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Listing of EXPERIMENTAL Products
 
Product Name Brief Description Submitter Date Entered
Experimental Enhanced Graphical Hazardous Weather Outlook (EHWO) 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. John Ferree 2010-11-18
Experimental GATE Forecast Arrival and departure sectors for major airports, also called gates, are polygonal regions which roughly follow Air Route Traffic Control Center (ARTCC) low-level sectors where arrivals and departures to these airports will be routed. It is important to know whether significant weather, such as thunderstorms, could affect large portions of the sectors so that traffic can be rerouted, if needed, to other sectors. The Gate Forecast is a decision support algorithm that uses the High-Resolution Rapid Refresh (HRRR) model to determine whether there is the potential for thunderstorm activity in a particular terminal gate. The algorithm initializes with the HRRR composite reflectivity forecasts and then does a time lag ensemble using the previous three HRRR model runs. It creates a grid with the maximum composite reflectivity at each grid point from the three runs (for example, the 1 hr. forecast from the 18UTC run plus the 2 hr. forecast from the 17 UTC run and the 3 hr. forecast from the 16 UTC run). From that grid, a probability factor is computed. Low composite reflectivity equates to low probability. High reflectivity equates to high probability. The algorithm computes the gate sector coverage of these probabilities. If more than 1% of the sector is covered in low probability (.25 chance), the gate is colored yellow. If more than 4% of the sector is covered in high probability (.60 chance), then it is colored red. These are then computed for each forecast time from the HRRR. The product display overlays the sector boundaries on the current radar loop. The sectors are color-coded using a three tiered approach: • Green - no significant weather • Yellow - some significant weather that might affect some portions of the gate • Red - significant weather that could affect large portions of the gate Around each gate is an icon with the gate name and the forecasts for the next nine hours. Clicking on the icon will bring up a dialog box that shows the percent coverage of low (2560) thunderstorm probability, the three HRRR runs used in the forecast and the time of the last update. Mike Bettwy 2015-06-02
Experimental Gerling-Hanson Wind Wave Plots The experimental Experimental Gerling-Hanson Wind Wave Plots are graphical vector plots 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 Nearshore Wave Prediction System (NWPS) model output. The wind is derived from the official forecast gridded database so they are consistent with all other forecast products, such as the Coastal Waters Forecast. WFO Eureka has been providing the Experimental Wave/Wind (Gerling-Hanson Plots) on an experimental basis since 2010. The Gerling-Hanson plots have been very useful for the marine customers and the product has been expanded to other regions for comment and review. Troy Nicolini 2014-11-07
Experimental Graphical Forecasts for Aviation In May 2015 the National Weather Service received a formal request from the Federal Aviation Administration (FAA) for the NWS to cease production of textual Area Forecasts (FAs), contingent upon the provision of equivalent meteorological information in support of aviation.The Graphical Forecasts for Aviation include observations and forecasts valid for the continental United States. Observational data and warnings are time synchronized and available by the hour for the current time and the prior six hours. Hourly model data and forecasts, including National Digital Forecast Data (NDFD), are available to 15 hours in the future. Wind, icing and turbulence forecasts are available in 3000 ft. increments from the surface up to 18000 ft. MSL, and in 6000 ft. increments from 18,000 MSL to FL420 (42,000 ft. MSL). Turbulence forecasts are also broken into LO (below 18,000 MSL) and HI (at or above 18,000 MSL) graphics. A maximum icing graphic and maximum wind velocity graphic (regardless of altitude) are also available.Multiple fields of interest are combined in categories that the user is able to select from the top level Weather menu. The data for each category is determined by the time period, observations (current time and the prior six hours) and forecasts (valid up to 15 hours in the future). Additional information is available in text format when mouse-clicking on the map or using the hover function. The “Configure” menu enables the user to customize the satellite and radar displays in addition to choosing parameters for the observations and aviation advisories displayed. Imagery, observations, and forecast graphics are overlaid on high-resolution basemaps from ESRI, including colored relief, satellite and street views. Overlays include navigational aids, airports, and heliports for the entire United States. More detail is revealed as you zoom in and individual layers can be turned on or off independently. Debra Blondin 2016-01-05
Experimental Graphical Weather Review Webpage The WFO Corpus Christi issues daily LCO, RTP, and RRM text products for users. This local data is merged with the national AHPS rainfall data to produce PNG and KMZ files of daily high temperatures, daily low temperatures, and daily rainfall for the WFO Corpus Christi County Warning Area. The ability to retrieve past PNG and KMZ files exists within the web interface. Melinda Bailey 2013-11-08
Experimental Graphical Wind Against Current The experimental product is a graphical depiction of the maximum 24 hour wind component from the NWS Global Forecast System that opposes the surface current of the Gulf Stream system as defined by the U.S. Navy High Resolution Coastal Ocean Model (NCOM). Joseph Sienkiewicz 2014-05-01
Experimental Gridded Marine Offshore and High Seas Forecasts in the NDFD The National Weather Service’s National Hurricane Center’s Tropical Analysis and Forecast Branch (TAFB), the National Centers for Environmental Prediction’s (NCEP) Ocean Prediction Center (OPC) and the Honolulu Weather Forecast Office (HFO) will provide gridded forecasts of four marine weather elements to the National Digital Forecast Database (NDFD) on an experimental basis for their offshore waters and high seas forecast areas of responsibility for the Atlantic and Pacific basins. The Weather Forecast Offices (WFO’s) in Fairbanks, Anchorage and Juneau Alaska will continue to supply on an experimental basis to the National Digital Forecast Database (NDFD) gridded forecasts of five marine weather elements over their offshore waters in the Arctic basin. Richard May 2013-03-14
Experimental Guidance from the National Blend of Models The National Weather Service (NWS) is developing the National Blend of Models (NBM) to provide a nationally consistent and skillful suite of calibrated forecast guidance based on a blend of NWS and non-NWS deterministic, ensemble, and statistically post-processed model output. The NBM was motivated by recent efforts to blend numerical model guidance to provide a better starting point for NWS gridded forecasts at the NWS Regions and the National Centers for Environmental Prediction (NCEP) Weather Prediction Center. The Disaster Relief Appropriations Act of 2013 (Sandy Supplemental) provided support for the NWS to leverage these ideas to implement a national-scale, centrally-produced, model blending approach. Lora Wilson 2016-08-19
Experimental Gulf Stream Forecast The Gulf Stream Forecast is a 3 hourly forecast for areas along the Gulf Stream as output from the NWPS model from the WFO Miami Forecast Office. The graphic display shows the Gulf Stream current, significant wave height, wind speed, and peak wave period and direction in graphical formats. There are 4 separate geographical areas, and all the graphs can be stepped in time or looped on the webpage. Melinda Bailey 2015-09-11
Experimental Hold Over Threat Index (Elko) In the Great Basin a significant threat to large fire spread occurs when relative humidity is low and strong winds develop a day or two after a lightning event. The Holdover Threat Index is a GFE graphic that displays the threat of “holdover fires” for the WFO Elko county warning area. It can also be displayed on the web with all other fire weather graphical forecasts. This graphic is intended to heighten awareness for days when conditions are favorable for smoldering fires to grow. Users of this product are the fire weather community. Claudia Bell 2014-05-14
Experimental Hurricane Threats and Impacts Web Interface The experimental Hurricane Threats and Impacts Web Interface (HTI-Web) is an internet-based decision-support service designed to help users quickly interface with local hazard information whenever tropical storm and/or hurricane watches and warnings are in effect along the United States East and Gulf coasts, including Puerto Rico. Local threat assessments and corresponding potential impacts information about tropical storm or hurricane wind, storm surge, flooding rain, and tornadoes are provided by coastal Weather Forecast Offices (WFOs). Select preparedness information is also provided. Mike Dion 2015-06-03
Experimental Impact Based Warnings This is an expansion of the NWS Experimental Central Region Impact Based Warning demonstration in 2012 and 2013.Severe Thunderstorm Warning (SVR), Tornado Warning (TOR) and Severe Weather Statement (SVS) products will be stratified into categories distinguishing extreme cases from base convective warnings. Additional enhanced wording will be included to convey information about associated impacts, specific hazards expected, and recommended actions, both within the bullet statements and as part of the tag line codes.Based on feedback from the Central Region 2013 Experimental Impact Based Warnings, the 2014 demonstration will include some changes. The most significant change for the 2014 national experiment is that the impact statements for “CONSIDERABLE” and “CATASTROPHIC” serve as markers of confidence of tornado occurrence, with both reflecting an “elevated tier” of tornado damage and risk. The term CATASTROPHIC will only be used when a tornado is striking an actual community. Issuing enhanced convective warnings in 2014 will be the 38 Central Region Weather Forecast Offices (WFOs), 5 WFOs within NWS Southern Region (Norman, OK; Tulsa, OK; Jackson, MS; Lubbock, TX and San Angelo, TX); 1 WFO within NWS Eastern Region (Blacksburg, VA); and 2 WFOs within NWS Western Region (Great Falls, MT and Glasgow, MT). John Ferree 2014-03-11
Experimental Impact-Based Marine Hazard Grids Impact-based marine hazard grids (IBH) provide the marine community with a detailed depiction of expected adverse weather conditions. Unlike zone-based hazards, IBH also show parts of zones where no hazard is expected which allows for continued marine operations. The Weather Ready Nation concept calls for improving information to customers and partners to enhance decision support. Providing additional hazard details fills that requirement. Jeff Lorens 2015-06-01
Experimental International Arrival and Departure GATE Forecasts These web-based International Departure Gate Forecast (IDGF) and International Arrival Fix (IAF) forecasts provide categorical convective guidance for specific locations in the National Airspace System (NAS) allowing for more accurate air traffic management. These forecasts will be a collaborative effort between the NOAA/NWS Center Weather Service Units (CWSU) located at the FAA Air Route Traffic Control Centers in Nashua NH (Boston), Ronkonkoma NY (New York) and Leesburg VA (Washington).The purpose of this experimental web page is to provide the Federal Aviation Administration (FAA) and the airlines with expanded weather planning information.This expanded information begins to address a gap in the NWS convective product suite and the Terminal Aerodrome Forecast (TAF). Specific forecast products are not available that forecast convective weather at aeronautical arrival and departure fixes (known as ‘gates’). Thunderstorm impact at or near these gates has a significant impact on the flow of aircraft through the NAS causing delays. This will allow critical partners and customers to make more informed decisions regarding the air traffic flow through the NAS. Scott Reynolds 2015-08-28

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