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National Weather Service
Report - listing of Operational Products in database, sorted by product Originator.
Product Name Brief Description     Click Here for "Printable" version of this list. Originator
Observed Precipitation Map The National Weather Service (NWS) collects rainfall data to support its forecast and warning operations. Individual River Forecast Centers (RFCs)and Weather Forecast Offices typically provide rainfall collectives in text format and graphical format for their areas of responsibility. The National Centers for Environmental Prediction (NCEP) Climate Prediction Center (CPC), collects additional data from cooperative observers. This rainfall data is made available to HPC and is used extensively for verification purposes.This rainfall data is plotted on a map of the CONUS and made available to forecasters. The data is used for feedback on forecast accuracy and can be used in case studies and other scientific endeavors. Edwin Danaher 
HPC Today's National Weather Chart in Spanish This product is a Spanish language version of the HPC National Forecast Chart providing an overview of today’s national weather with an emphasis on hazardous and significant weather Edwin Danaher 
HPC Probabilistic Freezing Temperature Charts This product provides a probability that the temperature at a location will fall below 32 degrees Fahrenheit. This product is derived from the NDFD temperature grid data and the 2 meter temperature grid spread data from the GFS ensemble. Edwin Danaher 
HPC Probabilistic Quantitative Precipitation Forecasts This product provides a probabilistic forecast of rainfall over the continental U.S. in six hour increments. Edwin Danaher 
HPC 6hr Interval Quantitative Precip Forecast for days 4 and 5 This Product provide QPF forecasts for days 4 and 5 in six hour increments. HPC forecasters prepare forecasts for 6hr periods out three days. In addition HPC forecasters prepare a 48hr forecast for days 4 and 5. Several RGCs have requested that HPC provide the day 4 and 5 forecasts in six hour increments rather than one 48 hr increment.This will augment the current 48 hr forecast prepared by HPC. Edwin Danaher 
NATIONAL MULTI-SENSOR PRECIPITATION ESTIMATES WEB-BASED SERVICE These Quantitative Precipitation Estimates (QPE) Graphics are representations of rainfall that has occurred for a specific length of time. Currently, each RFC prepares its QPE graphics using different colors, precipitation thresholds, and geographic projections. By producing these graphics centrally, it will enable the public to compare data across the CONUS and Puerto Rico. Parameter-Elevation Regressions on Independent Slopes Model (PRISM) climate data from a cooperative venture between Oregon State University and the United States Department of Agriculture-Natural Resources Conservation Service provides a grid format of normal precipitation. Frank Richards 
Collaborative Convective Forecast Product The Collaborative Convective Forecast Product (CCFP) is a graphical representation of expected convective occurrence at 2-, 4-, and 6-hours after issuance time. Convection is defined as a polygon of at least 3,000 square miles with coverage of at least 25% with echoes of at least 40 dbZ composite reflectivity and at least one echo top of 25,000 feet or greater. CCFP covers the contiguous 48 states and portions of Ontario and Quebec south of 48 degrees north latitude. Fred Johnson 
Precipitation Frequency Data Server NWS precipitation frequency estimates have traditionally been delivered in the form of Weather Bureau Technical Papers and Memoranda as well as NOAA Atlases, all hard copy documents. With the advent of the World Wide Web, these documents have been scanned and made available via web pages. The National Weather Service specifically developed the Precipitation Frequency Data Server as the primary web portal to precipitation frequency estimates and associated information (Parzybok and Yekta, 2003). Recent updates to NWS precipitation frequency are being delivered entirely in digital rather than hard copy form in order to make the estimates more widely available to the public and to provide the data in a broader and more accessible range of formats. Geoffrey Bonnin 
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). Gregory Schoor 
Enhanced Product Fire Weather Planning Forecast (FWF) Bullet Format A Fire Weather Forecast (FWF) that utilizes left-justified asterisks to begin each line of text. The asterisks help maintain proper word wrapping and indentations in the AWIPS text editor. This significantly reduces the amount of time needed to edit the product before dissemination. Heath Hockenberry 
Wind Speed Probabilities-based Tropical Cyclone Danger Graphic The Tropical Analysis and Forecast Branch (TAFB) is providing 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. Hugh Cobb 
NHC/TAFB Web Based Graphicast 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. Hugh D. Cobb 

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