Listing of Experimental Products (Static page. Please use browser search (Control-F) to find a product.)

Product Name and link to PDD or SDDDescription

Enhanced Product Modification of Severe Convective Warnings and Associated Follow up Statements to Emphasize Impacts, Intensity and Recommended Actions via Bulleted Messaging and Coded Tag Lines (Enhanced)

PDD_CR_IBW_011012.pdf

Enhanced wording within format of Tornado Warnings (TOR), Severe Thunderstorm Warnings (SVR), and Associated Follow-up Statements (SVS). Messages are modified to emphasize impacts, intensity, and recommended actions via bulleted messages and coded tag lines

Enhanced Product- Addition of Forecast Maximum Hail Size Coding to Tornado Warnings and Associated Follouw-up Statements (Enhanced)

SDD_CR_TORtag.pdf

The Tornado Warning (TOR) is an alphanumeric product providing short-fused warning information on hazardous conditions associated with thunderstorms which are expected to spawn one or more tornadoes, thus posing a threat to life and/or real property. This product is prepared by each National Weather Service (NWS) Weather Forecast Office (WFO) for their County Warning Area (CWA) of responsibility. Integrated Warning Team workshops, as well as several societal impacts groups, have indicated a desire by many emergency managers and media partners for a concise tag line on the end of the TOR product (as well as associated SVS follow-up statements) identifying maximum hail size expected for the storm(s) which prompted the TOR issuance. Decoding this tag line will facilitate the capability for partners to rapidly decode this information to make important decisions concerning the ancillary hail threat associated with those storms.

Enhancement to National Spot Webpage: Experimental HYSPLIT Trajectories Request Function (Enhanced)

spotwebpage_hysplit.pdf

The National Spot Webpage provides a nationally uniform portal for NWS customers to request, receive, and leave feedback for site specific spot forecasts. As of September 19, 2011, the National Spot Webpage will host a new functionality for requesting HYSPLIT (Hybrid Single Particle Lagrangian Integrated Trajectory model) trajectory runs from NOAA's Air Resources Laboratory (ARL) on an experimental basis. These elements will be available based on the NAM for the CONUS, and based on the GFS for Alaska and Hawaii.The HYSPLIT Trajectories Request Function would allow users to request HYSPLIT trajectory runs at 500, 1500, and 3000 meters for the latitude/longitude of the spot request. The trajectory runs will begin at the specified ignition time on the spot request. To request HYSPLIT trajectories with a spot request, the user must enter the phrase "hysplit to email@domain.gov" in the remarks section of the spot request form. The HYSPLIT trajectory raw data, as well as gif and KML files will be sent to the specified email address.

Enhancement to the National Snow Analysis: Experimental NOHRC Snow Model and Forecast Products Expansion (Enhanced)

NOHRSC_PDD_ANNE_OP.pdf

The NOHRSC is expanding the spatial domain of its gridded snow model into Canada to include the Great Lakes drainage area. Additionally, the NOHRSC is executing the model in a 72-hour forecast mode. The Rapid Refresh (RR) model forces the first 18 forecast hours and the North American Mesoscale (NAM) model forces the remaining 54 forecast hours.

Experimental Alaska Region NDFD Grids (NEW)

AK_ExperimentalPDD_08292011.pdf

PDD updated in 2011 to extend comment period. PDD updated in 2010 to extend comment period and to update links. PDD updated in 2009 to include new elements: Hazards, Weather, Temperature, Dew Point, Wind Gust, Sky Cover, Apparent Temperature, Relative Humidity, Quantitative Precipitation Forecast (QPF) and Snow Amount. Under statute, the National Oceanic and Atmospheric Administration (NOAA) National Weather Service (NWS) is charged to collect data on climate, water, and weather, provide forecasts and warnings of severe weather in order to protect life and property, and create and disseminate forecasts and other weather information for the benefit of a wide range of weather sensitive businesses and activities. By capitalizing on rapid advances in science and technology and infusing these advances into its operations, the NWS has taken steps to proactively respond to ever changing and growing demands of its users. The most recent experimental digital datasets (and associated graphic forecast displays) integrated into NDFD are the following elements for Alaska: Maximum Temperature, Minimum Temperature, 12-hour Probability of Precipitation, Wind Speed, Wind Direction, and Significant Wave Height.

Experimental Area Fire Weather Forecast Matrix (AFW) (NEW)

PDD_AFW_GSP.pdf

Land management agencies in Georgia, North Carolina and South Carolina have expressed a need for easily accessible tabular forecast data similar to the Point Fire Weather Forecast Matrix (PFW), except that it encompass an entire fire weather zone instead of just a point. The requirement is for something similar to the existing Area Forecast Matrix (AFM), but with fire weather/smoke management parameters included. It would be tailored to facilitate fire behavior applications in the planning stage by land managers. An area fire weather matrix would satisfy this need well because it would allow agency specialists to quickly run sample fire behavior models for planning purposes for random areas outside of PFW forecast points. The experimental product will be called the Area Fire Weather Forecast Matrix (AFW) and would be generated routinely for all 56 zones in the WFO Greenville-Spartanburg (GSP) county warning area. (CWA) : The experimental AFW is produced by running a modified AFM formatter that uses the local digital forecast data base (DFD). The product will be generated via a GFE automation script every time grids are published by a forecaster. A script will also post the AFW to the WFO GSP website. No additional grids or forecaster intervention will be required.

Experimental Aviation Impact Guidance for Convective Weather (AIGCW) (NEW)

AIGCW_PDD.pdf

The Aviation Impact Guidance for Convective Weather (AIGCW) is a graphical forecast capability that represents the probability of convective weather impacting air traffic operations in the National Airspace System (NAS). The weather portion of this product utilizes the Short Range Ensemble Forecast (SREF) Calibrated Thunderstorm output and the air traffic portion utilizes a 5-year sample set of historical air traffic data from 1 January 2004 through 31 December 2008. The AIGCW capability is then able to graphically illustrate the probability of convective weather impact to the normal albeit historical flow of air traffic in the NAS. The AIGCW was developed in conjunction with the FAAs longer range collaborative strategic planning process which is well beyond the traditional 6hr strategic planning timeframe. AIGCW provides a convective weather impact forecast to air traffic flows for 1-hour forecast intervals through 39 hours and 3-hour intervals through 87 hours.

Experimental Aviation Winter Weather Dashboard (NEW)

expr_common_wint_wx_pdd.pdf

The Experimental Aviation Winter Weather Dashboard depicts the potential winter weather impact to the Core 30 (minus Honolulu) airports. Updated four times per day, the web display shows the potential impact to each airport through a matrix of color coded boxes that depict nominal (green), slight (yellow), moderate (orange), and high (red) impact through eighty-seven forecast hours. The impact information is calculated using the Short-Range Ensemble Forecast (SREF) numerical weather prediction system

Experimental Cold Advisory for Newborn Livestock (CANL) Graphic (NEW)

canl_national_pdd.pdf

This is the fourth year of running this experimental program. In the winter of 2008-2009,NWS Glasgow ran this system. Due to significant livestock losses in other areas of the high plains during the winter of 2008-2009, additional NWS offices joined the experimental test period for the 2009-2010,2010-2011,and 2011-12 winter seasons including: WFO Aberdeen, SD WFO Billings, MT WFO Bismarck, ND WFO Glasgow, MT WFO Great Falls, MT WFO Pocatello, ID WFO Pendleton, OR Durint the 2011-2012 experimental test period, NWS will survey other entities in the weather enterprise for their interest in providing this type of service to the livestock industry.

Experimental Enhanced Hazardous Weather Outlook (EHWO) (NEW)

SGF_EHWO_PDD.pdf

The NWS core mission is to provide accurate and timely hazardous weather information for the protection of life and property. Although the textual Hazardous Weather Outlook (HWO) plays a vital role in supporting the NWS mission, effectively conveying hazardous weather information in a textual or narrative format can prove challenging to an increasingly diverse customer base. The EHWO is a decision support service that supports preparedness and response efforts prior to and during hazardous weather. In conjunction with the textual HWO, the clear and concise Internet-based EHWO graphics provides decision makers with convenient access to potential weather hazard information by graphically depicting the risk of multiple weather hazards out to seven days in the future. The Advanced Weather Interactive Processing System (AWIPS) Graphical Forecast Editor (GFE) produced EHWO packages multi-level color coded hazard graphics and text within a comprehensive web page suite. Further, weather hazards and thresholds are easily customized based on external customer needs for a particular office. Ultimately, workload is conserved through the use of existing local and national guidance GFE grids such as the Storm Prediction Center and the Hydrometeorological Prediction Centers, supporting a seamless office to office presentation.

Experimental Extreme Cold Warning (NEW)

Exp_Extreme_Cold.pdf

National (Optional) On occasion, winter temperatures may fall to extreme cold readings with no wind occurring. Currently, the only way to headline very cold temperatures is with the use of Wind Chill Advisory or Warning products. In the rare situations where actual temperatures reach Wind Chill Warning criteria with little or no wind, WFOs may issue an Extreme Cold Warning (EC).

Experimental Facebook Pages (NEW)

facebook_sdd.pdf

Facebook, the largest of the social media sites, is a social networking web site where users can connect and interact with other people, organizations, and businesses. NWS will be using local and national facebook pages as a supplemental channel to experimentally disseminate environmental information and promote weather awareness activities including outreach and educational efforts

Experimental Fire Weather Planning Forecast (FWF) Text Format (Enhanced)

FWF_Text_Format_Extension_PDD.pdf

Customer feedback from the Pacific Northwest test in 2011 was all positive. Based on those responses, the test has been expanded to include all WFOs in Western Region optionally, based on office need and customer concurrence. Each office that chooses to test this format in 2012 per the dates above will issue their own Service Change Notice. This experimental FWF text format utilizes left-justified asterisks to begin each line of text. The asterisks help maintain proper word wrapping and indentations in the AWIPS text editor, significantly reducing the amount of time needed to post edit the product before dissemination.

Experimental Forecast of Reference Evapotranspiration for Short Canopy Vegetation (CR) (NEW)

PDD_Extension_Central_Region_Evapotranspiration_Digital_Forecast.pdf

The experimental reference evapotranspiration forecast will be displayed as a graphic of gridded data within the WFOs county warning area. The forecast is the expected amount of daily reference evapotranspiration in hundredths of an inch for the next 7 days and a total reference of evapotranspiration for the 7 day period. The forecast is calculated by standardizing on the tall canopy vegetation (50 cm full cover alfalfa) algorithm. This product will be issued three times a day around 5 am, 12 pm, and 4 pm local time.

Experimental Forecast of Reference Evapotranspiration for Short Canopy Vegetation (WR) (NEW)

FRET_Ext_PDD.pdf

The experimental reference evapotranspiration forecast will be displayed as a graphic of gridded data and a supplemental tabular display of selected sites within the WFOs county warning area. The forecast is the expected amount of daily reference evapotranspiration in hundredths of an inch for the next 7 days and a total reference of evapotranspiration for the 7 day period. The forecast is calculated by standardizing on the short canopy vegetation (12 cm or 4.72 in grasses or alfalfa) algorithm. This product will be issued twice a day around 5 am and pm local time.

 

 

Experimental Gridded Marine Forecasts (NEW)

PDD_Gridded_Marine_Weather_Elements_official-1.pdf

 

 

The Tropical Analysis and Forecast Branch (TAFB) is providing on an experimental basis five (5) day forecasts of gridded Mean Sea Level Pressure, Surface (10-m) winds, significant wave heights, swell height/direction and primary wave period. These grids are produced by the forecaster through the AWIPS Graphical Forecast Editor (GFE) and are currently experimental.

Experimental HPC Quantitative Precipitation Forecasts for Puerto Rico and the Virgin Islands (NEW)

HPC_QPF_Puerto_Rico_PDD.pdf

This product provides Quantitative Precipitation Forecasts (QPFs) for Puerto Rico and the Virgin Islands for use as guidance at NWS WFOs and RFCs and the general public and emergency management commuunity, etc.

Experimental Hydrologic Short-Term Meteorological Model-based Ensemble Forecasting System (MMEFS) (NEW)

MMEFS_PDD_2ndrelease.pdf

The National Weather Service's (NWS) experimental Hydrologic Short-Term Meteorological Model-based Ensemble Forecasting System (MMEFS) webpage and text products are to provide continuous hydrologic contingency and planning river stage forecasts for many customers, such as the National Weather Service (NWS) Weather Forecast Offices (WFOs), emergency managers, the United States Army Corp of Engineers (USACE), United States Geological Survey (USGS), etc., which have a planning need for uncertainty in our short-term hydrologic forecasts within the first 7 days.

Experimental Ice Accumulation Grids (NEW)

ndfd_iceaccum.pdf

Ice Accumulation Grids will be available in the NDFD on an experimental basis. OCWWS will issue a Technical Information Notification to alert users (with 30 days advance noticre that an experimental period will commence in addition to a coordination memo for field offices which describes smart tools to create ice accumulation grids.

Experimental Marine Web Portal (NEW)

MarineWebPortalPDD_2010.pdf

The National Weather Services (NWS)Marine Web Portal provides marine observations, forecasts and short and long-fuse warnings for the coastal waters of North Carolina, South Carolina and northern Georgia and the Atlantic and Gulf coast areas of the Southern Region. The recent development of regional and sub regional coastal ocean observing systems under the national Integrated Ocean Observing System (IOOS) initiativecreates new opportunities for increased meteorological and oceanographicdata availability.

Experimental Maximum/Minimum Relative Humidity NDFD Grid (NEW)

MaxMinRHPDD.pdf

The Maximum and Minimum Relative Humidity grids will be calculated automatically nationally from existing NDFD hourly temperature and hourly dew point grids. The Maximum Relative Humidity grid will extend from 06Z to 18Z and the Minimum Relative Humidity grid will extend from 18Z to 06Z.

 

Experimental Mixed Case Letters in WFO Text Products (NEW)

Mixed_Case_WFO_Text_Products.pdf

 

Many NWS partners and users have identified the need for NWS text products to be provided in mixed case letters and to include an expanded punctuation and character set. Previously, national Public Information Statements (PNSs), including national Service Change Notices (SCNs) and national Technical Implementation Notices (TINs), were provided in mixed case letters with an expanded punctuation/character set for a risk reduction effort using non-operational products: (http://www.weather.gov/os/notification/scn10-28mixed_case.txt). This experimental PDD expands the risk reduction effort to a few operational, but non-critical, Weather Forecast Office (WFO) text products: the Area Forecast Discussion (AFD), the Regional Weather Summary (RWS) and local PNS's (including local SCN's and TIN's) for four WFOs: Kansas City/Pleasant Hill, MO - EAX Louisville, KY -LMK Spokane, WA - OTX Tallahassee, FL - TAE

Experimental Mobile Decision Support Services(MDSS) Interactive NWS iNWS Warning Alert SMS Text and Email Messaging Services via Mobile Device Technologies (NEW)

MDSS_National_SDD_Final_070710.pdf

The National Weather Service (NWS) is responsible for providing weather warnings and alerts in a timely and effective manner to support the protection of life and property. The NWS must provide this information to an increasingly mobile user community who are utilizing rapidly evolving technologies for accessing Internet content via mobile wireless devices. In response to this, the NWS is developing weather warning messaging services that leverage mobile device technologies such as Personal Digital Assistants (PDA) and cell phones, in order to better serve NWS core partners (see footnote) 1). The NWS Western Region (WR) has developed a real-time, warning messaging service adapted to the unique characteristics of cellular phones and mobile devices. This service has been named Mobile Decision Support Services (MDSS) interactive NWS iNWS. Users who subscribe can configure their user profile (via an interactive web page) to receive alerts for weather and environmental warnings, watches and advisories via Short Message Service (SMS) text messages or email, as they occur. This capability is provided on the MDSS iNWS webpage through an application called "iNWS Mobile Alerting". iNWS Mobile Alerting provides the user the option to choose which class/classes of NWS products (hydrologic, marine, severe weather, etc.) to be alerted for. iNWS Mobile Alerting also allows the user to define specific alert areas by city, state, line or point and the recently adopted polygon for defining short fused NWS watches and warnings. SMS text and email alerts will only be sent to users when an alert falls within the user's configured area of interest The SMS text and email alert provides a short headline and embedded hyperlink which the user can select to see additional multimedia information (including graphics and images relevant to the particular weather event). This additional information may include products currently available on the NWS Website or products generated specifically to support decision making by NWS core partners. MDSS iNWS services are provided via a web page http://inws.wrh.noaa.gov. Currently, only "iNWS Mobile Alerting" is being provided as an experimental service to NWS core partners in preparation for a decision on operational implementation. In future phases of this project in addition to the experimental service documented in this SDD, the web page may link to other mobile services that are already operational such as NWS web services via wireless technologies (see NWS web services via wireless technologies SDD) as well as additional experimental services. The national experimental MDSS iNWS SDD supersedes the regional experimental: NWS Warning Alert Messaging Services via Mobile Device Technologies SDD issued in November 2007. The regional experimental service was previously provided by NWS WR to the general public. In August 2009, the NWS approved a phased approach toward developing a standardized, baseline national mobile decision support service (see attached NWS Decision Memorandum, August, 2009) with the initial focus on NWS core partners. The experimental MDSS iNWS is now available as a national experimental service for NWS core partners only. 1 NWS core partners include (1) Members of the Emergency Management community at all levels of government;Federal, State, Local and tribal. Other members of this community include: safety and emergency personnel, from universities or other entities with large populations, whose roles are similar to the public safety officials. (2) Other government agencies: specific government partners NWS requires close coordination with, e.g. FAA officials (for NWS Center Weather Service Units) and water and land management officials (for NWS River Forecast Centers) Members of the Electronic Media: parties who operate systems that routinely provide weather and water warning information rapidly to a significant part of the population served by the NWS.

Experimental National Fire Weather Web Page (NEW)

NationalFireWxWebPagePDD.pdf

The ability of the National Weather Service (NWS) to provide digital and graphic fire weather products and services over the internet continues to increase. Concurrently, the need for improved fire weather information on the internet by land management and fire suppression agencies also continues to increase. Multiple federal fire weather user agencies have expressed a need for an improved national fire weather web page that includes more interactive graphics. OS/22 Fire and Public Weather Branch began testing a new, highly interactive national fire weather web page October 1, 2009. Because existing fire weather information is bundled and/or presented in new formats, the national fire weather web page is considered a new experimental service

Experimental National Marine Weather Web Portal (NEW)

National_MWP_2012.pdf

The National Marine Weather Web Portal is an experimental effort designed to provide a seamless suite of information to the marine community. This effort has grown out of an initial Eastern and Southern Regional led and NOAA IOOS sponsored/developed effort in 2006 in the Gulf of Mexico and Southeast and is now being expanded nationwide.

 

 

 

Experimental National Water Resources Web Page (NEW)

ExpNationalWaterResourcesWebpage.pdf

 

 

 

The Experimental Water Resources Web Page provides a single web page for displaying water resources information from all River Forecast Centers (RFC). Water resources information includes expected streamflow conditions for next 30, 60, and 90 days. A range of flows are provided for each time period. Forecasts of the most likely value are color coded according to percentage of normal streamflow. More specific information for individual forecast points are available by drilling down to points. Gridded information, such as soil moisture and snow water equivalent may also be provided.

Experimental NDFD Full Resolution (Enhanced)

NDFD_FULL_RES_PDD.pdf

The resolution will be increased in the National Digital Forecast Database. The NDFD spatial resolution will be available in experimental status at 2.5km resolution for all forecast times. The NDFD temporal resolution will be available in experimental status at one hour resolution for the first 36 hours from NDFD issuance time. These are the finest spatial and temporal resolutions at which Weather Forecast Offices in the Conterminous United States /CONUS/ provide forecasts. Forecasts from NWS offices and centers employing coarser resolutions will be mapped onto the finer resolution NDFD grid This change will affect files which contain data for the entire CONUS, but will not include Alaska, Hawaii, Guam, Puerto Rico and the Virgin Islands, or the 16 CONUS subsectors which will remain at their current operational resolutions

Experimental New NWS Hazards Map Interface (NEW)

newmappdd.pdf

An experimental new interactive web map displaying National Weather Service (NWS) hazardous, routine, and observed weather information and forecasts.The operational web-based watch/warning/advisory (w/w/a) map was conceived and implemented nearly a decade ago, and does not take advantage of the capabilities of modern web browsers. Comments recently gathered from key partners in the emergency management and electronic media communities indicate the existing interface is difficult to understand and does not fully meet their needs. This new experimental NWS hazards map interface provides more interactive, easier to understand access to NWS weather information.The intended audience is the general public, emergency managers, electronic media, NOAA, and other federal, state, and local government agencies.

Experimental NHC Audio Briefings (Podcasts) (NEW)

NHCPDDPodcast.pdf

NHC will be producing experimental audio briefings (also called podcasts) again for the 2012 Hurricane season when the media pool is activated. The audio feeds will be created in mp3 format, and to increase their accessibility, links to the mp3 files will be made available through XML/RSS technology. Anyone with an mp3 player and podcasting software can receive the audio file from the National Hurricane Center. The .mp3 audio format is an industry standard which allows audio products to be dissemeniated via the Internet.

 

 

Experimental NHC Media Briefings : Videocasts (NEW)

NHCPDDVideocast.pdf

 

 

For the 2012 Hurricane Season The National Hurricane Center (NHC) has entered into an agreement with Weather Decision Technologies (WDT), Inc. to provide internet protocol (ip) based audio and video streaming of its hourly hurricane briefings. The URL to the briefings will be posted on the NHC web site when the media pool is activated. Anyone with access to the internet and a web browser supporting audio and video can view the briefings broadcast from the NHC.

Experimental NHC/TAFB Satellite Rainfall QPE and QPF Webpage (NEW)

NHC_TAFB_Sat_Rainfall_Exp.pdf

This experimental webpage provides event-driven satellite-based quantitative precipitation estimates (QPE) and model-derived quantitative precipitation forecasts (QPF) for tropical cyclones and tropical disturbances affecting areas within the National Hurricane Center and Central Pacific Hurricane Center areas of responsibility (AOR). The experimental product represents an improvement over the existing text-only satellite precipitation estimate product which is based on the Griffith-Woodley technique developed in the 1970s. The experimental product provides more robust satellite-based precipitation estimates from the Naval Research Laboratory (NRL) Blended and the Climate Prediction Center (CPC) QMORPH techniques and a time-matched forecast from the Global Forecast System (GFS) in tabular text and storm centered graphical formats. A graphical version of these precipitation estimates is also provided. In addition, the experimental product provides a graphical 24 hour QPF from the Princeton Geophysical Fluid Dynamics (GFDL), the NOAA Hurricane Weather Research and Forecast (HWRF), and the GFS models. The target audience for this product primarily includes the forecast centers in the Caribbean, Mexico, Central America, and the Eastern and Central North Pacific. . In addition, decision support service (DSS) entities would have access to targeted QPF guidance that may be of assistance for distributing and directing resources to areas impacted by heavy rainfall

Experimental NHC/TAFB Web Based Graphicast (NEW)

PDD_TAFBGraphicasts_Experimental_2012.pdf

Daily graphical/alphanumeric depiction of significant weather features expected to affect the Tropical North Atlantic, Tropical Northeast Pacific and Southeast Pacific offshore waters and high seas area of responsibility of the Tropical Analysis and Forecast Branch.

Experimental NOAA NWS RFC Soil Moisture Model Output (NEW)

NOAA_NWS_RFCSoilMoistureModelOutput.pdf

The North Central River Forecast Center (NCRFC) has been exploring usability of National Weather Service (NWS) river forecast model soil moisture model output for applications beyond river flood forecasting. This valuable output could be used to support various activities related to economic cost savings for industry sectors involved in land resource management.

 

 

Experimental NWS Use of Twitter as an Environmental Information Service (NEW)

twitter_sdd.pdf

 

 

NWS will be using Twitter as a supplemental channel to experimentally disseminate environmental information and promote weather awareness activities including outreach and educational efforts.

Experimental PQR Model Spectrum Webpage (NEW)

Experimental_Portland_Model_Spectrum_WebpagePDD.pdf

This experimental web page originally developed at WFO Portland, OR (PQR) displays a "box and whisker" plot time series of statistical data that summarizes output from multiple numerical weather models in addition to the NWS forecast.This experimental web page will clearly show the uncertainty in the models (a good indicator of the possible outcomes) while at the same time being easy to understand. This service is meant to provide users the range of possibilities that exist in a forecast, not simply a single number that may be right or wrong. Users can use this web page to make a more informed decision based on the data presented, with the option to choose the NWS forecast if they feel uncomfortable with their interpretation of the data.

Experimental Probabilistic Day 3-8 Fire Weather Outlooks (NEW)

spc_day38fire_prob_pdd_ext 2012.pdf

The SPC Probabilistic Day 3-8 Fire Weather Outlooks provide a daily probabilistic forecast of critical fire weather conditions for dry thunderstorms and/or strong winds combined with low relative humidity for the continental U.S.

Experimental Probabilistic Tropical Cyclone Inundation Guidance Products (NEW)

PHISH_Products_032712.pdf

The Probabilistic Tropical Cyclone Inundation Guidance products consists of two suites of probability products for the Gulf of Mexico and Atlantic coastal areas. The first suite of products shows probabilities, in percent, of inundation exceeding 0 feet though 20 feet above ground level, at 1 foot intervals (e.g., the probabilities in percent, of inundation exceeding 0 feet, 1 feet, 2 feet, ... , 20 feet). The second set of products show the probabilities of inundation heights (above ground level) being exceeded, from 10 to 90 percent, at 10 percent intervals. The two suites of probabilities do not account for tide, waves, and fresh water (i.e. precipitation runoff and river inflow).

Experimental Probability of Exceedance Forecast for Precipitation and Snowfall (NEW)

PDD_Experimental_Probablility_of_Exceedance_.pdf

. This service enhancement adds the probability of exceedance for specific rainfall amount thresholds (0.10, 0.25, 0.50 and 1.00 inch) and snowfall amount thresholds (0.1, 1, 3, 6 and 12 inches) to the list of selectable elements for display by the user. B. Purpose/Intended Use: Enhancement of the Hourly Weather Graph format to provide access to forecast probabilities for rainfall and snowfall exceeding specific thresholds. The NWS has historically provided the probability of precipitation for 12 hour time periods which is the chance that the occurrence of rainfall will equal or exceed 0.01 inch or more at the selected location. This service enhancement provides the probability that rainfall or snowfall will exceed additional (higher) threshold amounts. Potential users of this enhancement would be in construction, agriculture, water management, outdoor planning, media, academia and the general public. For example, workers pouring concrete often need to know what is the chance of rainfall exceeding 0.10 inches, since rainfall above 0.10 would hamper or damage their work. Therefore, they would be able to display the probability of rainfall above the threshold of 0.10.

Experimental Rayleigh Distribution in the NWS Coastal Waters Forecast Product (Enhanced)

PDD_Rayleigh Distribution_CWF.pdf

This is an enhancement to the CWF product at WFO Miami (MFL) with the inclusion of additional wave height fields by implementing the theoretical Rayleigh Distribution. The inclusion of the average height of the highest 10%of waves observed at sea into the CWF product will provide a more descriptive and accurate assessment of the wave field expected for any particular time across a given marine zone.

Experimental Redesign NWS Web Services Via Wireless Technologies (Enhanced)

mobile.wx.gov_Redesign_PDD.pdf

This product is an experimental redesign of its existing mobile web page, http://mobile.weather.gov. The goal of the redesign is to update the look, feel, and functionality of NWS mobile web presence in order to better take advantage of the capabilities.

Experimental Revised Wave Terminology in the Coastal Waters Forecast (Enhanced)

PDD_WaveTerm_Full.pdf

Provide enhanced descriptions of the wave environment in the coastal waters. This will eliminate the terms "wind wave" and "swell" from the CWF and replace them with more descriptive wave systems. The enhanced wave terminology will introduce an overall sea state to every forecast period and provide a wave period for each significant wave system. Each forecast period will contain at minimum the overall sea height and a dominant period. At maximum given forecast periods will contain an overall sea height and its component wave systems and associated wave periods. At most, four wave systems could be listed. The old way of creating the CWF forces forecasters to arbitrarily break a combined sea state into swell and wind wave components using nomograms from the middle of the last century. Moving toward enhanced wave terminology allows the forecaster to detach from rules of the last century and leverage off of modern technology and establish a framework for utilization of future wave modeling advances.

Experimental RFC Decision Support Interface (NEW)

SDD_SR_RFC_FrontPage.pdf

A Google Earth based mapping service in which a variety of existing RFC products would be available for display and overlay.

Experimental Scaled Predictive Ice Storm Aftermath Index (NEW)

SPIA_pdd.pdf

The Scaled Predictive Ice Storm Aftermath Index (SPIA Index) utilizes gridded forecasts routinely prepared by NWS WFOs as a part of the National Digital Forecast Database. Forecast wind and ice accumulation grids are parsed to determine where specific overlapping criteria are met. The effects of the wind and ice accumulation are scaled from zero to five, with each element of the scale describing expected impacts to exposed electric utility systems. During an ice storm, forecast grids are combined with observed wind and ice accumulations grids to fully quantify the impacts.

(Approved: OPERATIONAL) SPC Enhanced Resolution Thunderstorm Outlook (NEW)

SPC_NewThunderFY11.pdf

This Product Description Document replaces the existing PDD, whose evaluation period expired 5 February 2010, and revises the current Experimental SPC Thunderstorm Outlook product based on customer and partner feedback. The revision to be tested this year provides greater temporal detail and year-round availability. This year's test will also evaluate changes in the distribution of SPC forecaster workload and the ability to maintain this product for all scheduled convective outlook times. The Experimental SPC Thunderstorm Outlook adds greater temporal and spatial resolution by depicting the expected areal coverage and probabilities for thunder in 4 or 8 hour time periods. A 40% probability means that given similar environmental conditions, thunder would be observed at any one location (in either a county or city) within the 40% thunder probability area four times out of ten, or 40% of the time.

Experimental TRACON Forecasts (NEW)

ZNYTRACONPDD.pdf

The web based Tracon Forecast provides categorical convective guidance for specific locations in the National Airspace System (NAS) allowing for more efficient air traffic management.

Experimental Tropical Cyclone Hazards Graphics (NEW)

PDDEXP_TCIG2012.pdf

Customers have requested additional tropical cyclone graphics to supplement the text products provided by WFOs. In addition, the hazards graphics will help to emphasize the wide-ranging impacts of tropical cyclones, particularly for areas away from the immediate coastline. The Tropical Cyclone Hazard Graphics comment period is being extended for the 2011 Hurricane season for the following reasons: 1) The lack of land falling tropical storms and hurricanes in 2010 has resulted in limited product production which in turn has resulted in limited feedback from users. 2) The 2010 NOAA Hurricane Conference recommended the product remain experimental for the 2011 Hurricane Season. 3) The addition of 2 Western Region WFOs: WFO San Diego and WFO Los Angeles The Tropical Cyclone Hazards Graphics is an experimental, internet-based, product suite consisting of four hazard graphics: wind, tornado, coastal flood, and inland flood. These WFO-generated graphics provide qualitative forecasts for the primary tropical cyclone hazards based on the track, intensity, and uncertainties in the official forecasts from the National Hurricane Center (NHC), Storm Prediction Center, and Hydrometeorological Prediction Center. In a new era marked by digital and probabilistic forecasts, the hazards graphics provide users with local products tailored by the wide-ranging knowledge and experience of the local WFO for their area of responsibility. All coastal WFOs in Eastern and Southern Regions. WFO San Juan is a new office which will be issuing the product for the 2010 hurricane season

Experimental Western Region WaveWind Hanson Plots Graphical Point Forecasts (NEW)

HansonPlots_Extension_PDD .pdf

WFO Eureka has developed a graphical vector plot of predefined point guidance for up to six wave trains (direction, height, and period), and wind (direction, speed) through a five day period at six hourly increments. If the point is associated with a buoy location, the previous 24 hour observations, partitioned in the same manner as the forecast waves, are plotted in three hour intervals. The forecast wave information is from the partitioned SWAN (Simulating Waves near shore) model output. The wind is forecaster derived. The current forecast coverage is limited to EKA WFO's forecast area, but as additional West Coast WFOs implement their local SWAN model, plots for other locations may be added over time

Experimental WFO WRF_NMM (NEW)

WFO_WRF_NMM_PDD_EXP.pdf

The WRF NMM is run locally at the WFO. It generates hourly output data out to 48 hours. The high resolution model is used for operational forecasting and research. Model Output graphics, generated by GEMPAK software, are posted for 3 hourly forecast time steps to a local WFO web page. The fields include geopotential heights, vorticity, temperatures, dew point, relative humidity, wind, vertical velocity, freezing level, precipitation amount and type, seal level pressure, thickness, clouds, precipitable water, convective available potential energy (CAPE), and convective inhibition (CIN). The web page is a convenient way for the local customers to view the same meteorological forecast data as the local WFO forecaster. This model has been run operationally at WFO Sacramento since May 2009 and the PDD is being expanded to provide this capability to other WFOs in the WR.

Experimental Wind Speed Probabilities-based Tropical Cyclone Danger Graphic (Enhanced)

PDD_Probabalistic_Danger_Graphic_FINAL.pdf

The Tropical Analysis and Forecast Branch (TAFB) is providing on an experimental basis a Tropical Cyclone Danger Area graphic based on the 34-kt wind speed probabilities through 72-hours from the latest tropical cyclone advisory for an active tropical cyclone. The graphic outlines avoidance areas using the 10% and 50% 34-kt wind speed probability contours from the latest tropical cyclone advisory issuances for both the Atlantic and East Pacific basins (Figures 1 and 2). The current Tropical Cyclone Danger Area graphic utilizes the mariners 1-2-3 rule to outline avoidance areas through 72 hours for active tropical cyclones. Feedback from users indicated that the use of the 1-2-3 methodology has led to "over-warned" large avoidance areas. The 1-2-3 methodology assumes an average forecast track error of 100 nmi at Day 1, 200 nmi at Day 2 and 300 nmi at Day 3 rule (Figure 3). These values are well above the most recent 10-year averaged forecast track errors of 50 nmi at Day 1, 85 nmi at Day 2 and 120 nmi at Day 3.

Weather, Water, and Climate Information Podcasts (NEW)

podcasts_2010.pdf

Podcasts are produced through the use of Really Simple Syndication (RSS) feeds and industry-standard mp3 files created by the NOAA Weather Radio All Hazards (NWR) broadcast management system that can be distributed over the Internet using syndication feeds, for playback on mobile devices and personal computers, thus making NWS data and products available in Internet-accessible, vendor-neutral form. The Podcasts are not a replacement for NWR and do not offer the warning capability of NWR Specific Area Message Encoding or Warning Alarm Tone, but rather allow the user to download products for playback at a later time on their computer or portable mp3 player.