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Listing of EXPERIMENTAL Products
Product Name Brief Description Submitter Date Entered
Experimental PQR Model Spectrum Webpage 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. Jonathan Wolfe 2011-04-15
Experimental Precipitation Potential Index (PPI) in the NDFD The Precipitation Potential Index forecast is now available as a new element in NDFD experimentally. The Precipitation Potential Index (PPI) is used by Weather Forecast Offices to derive 12-hour Probability of Precipitation (PoP12) forecasts and provides detail on precipitation timing at up to hourly resolution Providing PPI via NDFD enables users to make near-term decisions based on finer temporal resolution precipitation information than 12-hour Probability of Precipitation Andy Horvitz 2015-07-24
Experimental Probabilistic Snowfall Internet Graphical Products Probabilistic internet-based snowfall products provide customers and partners a range of snowfall possibilities, better communicate forecast uncertainties and enhance Decision Support Services during winter weather events. These snowfall products will complement existing National Weather Service deterministic snowfall graphics indicating areas of low and/or high uncertainty. Feedback on the experimental products has been overwhelmingly positive. This will be the fourth winter of the experiment, with the project expanding from a total of 18 Contiguous United States (CONUS) Weather Forecast Offices (WFOs) last winter to 60 CONUS WFOs for the Winter 2016/2017 season (note that 16 of the 60 will utilize the date “internally” only). Feedback will continue to be collected via the formal web survey and interaction with major users as well as an ongoing Social Science study. Richard Watling 2013-11-06
Experimental Probability of Exceedance Forecast for Precipitation and Snowfall 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 (PoP) 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. John S. Eise 2012-02-17
Experimental Rayleigh Distribution in the NWS Coastal Waters Forecast Product Comment period extended to add more SR offices. WFOs Miami, San Juan, Houston, Brownsville, Jacksonville, Corpus Christi and Houston. 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. Melinda Bailey 2012-03-12
Experimental Revised Wave Terminology in the Coastal Waters Forecast 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. Brian Garcia 2012-06-26
Experimental RIDGE2 RIDGE2 displays radar data in a web mashup using a web mapping application-programming interface (API) in combination with global information system (GIS) imagery overlays in the form of web mapping services (WMS). John Ferree 2012-11-19
Experimental Rip Current Risk Graphic Graphical Rip Current Risk derived from the Surf Zone Forecast. Wayne Presnell 2015-09-02
Experimental Service National Weather Service Provision of Supplemental Public Safety Information before, during and after High Impact Events A number of government agencies (federal, state and local) produce supplemental public safety information that is useful to the general public before, during and after high impact events. Recently, after two such high impact events, the National Weather Service (NWS) was able to share supplemental public safety information via the National Oceanic and Atmospheric Administration (NOAA) Weather Radio (NWR) and as messages in text format via the Public Information Statement (PNS) or Special Weather Statement (SPS) as described in NWSI 10-501 and NSWI 10-517. This SDD describes a service that will provide an established method of dissemination of this important information, without incurring the cost that would come with setting up a dissemination architecture system Michelle D. Hawkins 2013-03-27
Experimental Severe Weather Impact Graphics This product is a graphical depiction of each short-fuse warning product issued by the NWS Weather Forecast Office (WFO), CONUS only, with the inclusion of impact information to supplement the graphics. "Short-fuse warnings" include Tornado, Severe Thunderstorm, Flash Flood and Extreme Wind Warnings. Brian Walawender 2014-06-03
Experimental Short Range River Forecast Uncertainty (AHPS) A graphical hydrograph depiction of short-range river forecast uncertainty. The product provides probabilistic bounds for the river forecast in the context of high and low water thresholds used in AHPS. Ernie Wells 2015-02-25
Experimental Situation Report Hazardous Weather Outlooks modified to include graphics, links and other relevant information. Name changed from Experimental HWO Briefing. Derek Deroche 2014-01-08
Experimental SPC Probabilistic Day 3-8 Fire Weather Outlooks 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. John Ferree 2011-04-12
Experimental Tampa Bay Marine Channel Forecast Point forecast for 13 locations along the Tampa Bay channel designed to aid local mariners including emergency managers, United States Coast Guard, researchers (NOAA, universities, Florida Fish and Wildlife), Tampa Bay Harbor Pilots, towing or tug boat operators, recreational boaters, and any customer or partner with interest in the respective environmental data for Tampa Bay. A static Google Earth map displays the shipping channel in Tampa Bay along with 13 forecast points. Digital and high resolution model forecast data are used to produce the forecast for all points. Users may click on any point to view the latest information. Melinda Bailey 2012-12-05

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