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Listing of EXPERIMENTAL Products
 
Product Name Brief Description Submitter Date Entered
Proposed Changes to the National Tropical Cyclone Watch and warning (TCV) products for the Atlantic Basin for 2017 Effective on or around June 1, 2017, the National Hurricane Center (NHC) will expand the tropical cyclone watch and warning information available in its National Tropical Cyclone Watch/Warning (TCVAT#) products issued for Atlantic tropical cyclones. In past hurricane seasons, the National TCV products for the Atlantic basin contained only the tropical cyclone wind watches and warnings along coastal segments issued by NHC. Beginning in the 2017 hurricane season, the national TCV products from NHC for the Atlantic basin will include all NWS-issued zone-based tropical cyclone wind and storm surge watches and warnings from both NHC and local Weather Forecast Offices (WFOs) and will no longer contain breakpoint information. Wayne Presnell 2017-02-27
Proposed changes to the Operational Collaborative Convective Forecast Product (CCFP):Traffic Flow Management Convective Forecast (TCF) The Federal Aviation Administration (FAA) has requested the National Weather Service (NWS) update the CCFP to only include high-confidence forecasts and to rename the product the Traffic Flow Management (TFM) Convective Forecast (TCF). Like the CCFP, the TCF is a NWS product collaborated by meteorologists at the Aviation Weather Center (AWC) in Kansas City and embedded at the FAA Air Traffic Control System Command Center (ATCSCC) in Warrenton, VA, at the Center Weather Service Units (CWSU) embedded at the FAA’s Air Route Traffic Control Center (ARTCC), and at various airlines and authorized organizations. The TCF is a high confidence graphical representation of forecasted convection meeting specific criteria of coverage, intensity, and echo top height. These forecasts will allow Air Traffic Management (ATM) decision makers to proactively and collaboratively initiate, amend, or terminate planned or active Traffic Flow Management initiatives, resulting in safe and efficient use of the NAS. Clinton Wallace 2017-02-10
Proposed changes to the criteria for issuing tropical cyclone watches and warnings to include certain land-threatening disturbances that are not yet tropical cyclones The National Weather Service (NWS) proposes beginning on or about May 15, 2017,to have the option to issue watches, warnings, and graphical and textual advisory products for disturbances that are not yet a tropical cyclone, but which pose the threat of bringing tropical storm or hurricane conditions to land areas within 48 hours. Under previous long standing NWS policy, the NWS has not been permitted to issue a hurricane or tropical storm watch or warning until after a tropical cyclone had formed. Jessica Schauer 2017-01-31
Proposed Changes to Tropical Cyclone Forecast Graphics and GIS Files Effective on or about May 15, 2017, the appearance of the graphics accompanying tropical cyclone advisory packages issued by the National Hurricane Center (NHC) and Central Pacific Hurricane Center (CPHC) will change. These changes are required for the NHC and CPHC to begin issuing forecasts and watches/warnings for potential tropical cyclones.three new Keyhole Markup Language (KML) files will be available and the wind speed probability Geographic Information System (GIS) files will be available at higher resolution. Wayne Presnell 2017-01-31
Proposed Changes to the Hurricane/Typhoon Local Statement at WFO HNL The following changes to the operational Hurricane/Typhoon Local Statement (HLS) were implemented for the 2015 hurricane season (for the Atlantic Hurricane basin only): 1) HLS is a non-segmented product - No Universal Geographical Code (UGC). 2) HLS contains no Valid Time Event Codes (VTEC). 3) HLS covers land areas only. For the 2017 Hurricane Season, Weather Forecast Office (WFO) Honolulu plans to begin issuing the HLS in the same format used by the WFOs covering the Atlantic Hurricane Basin. There will be no changes for Western Region or for the other WFOs in the Pacific Region. Jessica Schauer 2016-12-06
Proposal to operationally implement the Hurricane Local Watch/Warning Product (TCV) at WFO Honolulu The Hurricane Local Watch/Warning product (TCV) was operationally implemented at Weather Forecast Offices (WFOs) in the Atlantic hurricane basin during the 2015 Hurricane season to accompany changes made to the Hurricane Local Statement. Plans to implement for Western Region and the remainder of Pacific Region are to be determined at a later date. For the 2017 Hurricane Season, WFO Honolulu plans to begin issuing the TCV in the same format used by the WFOs covering the Atlantic Hurricane Basin. There will be no changes for Western Region or for other WFOs in the Pacific Region. Jessica Schauer 2016-12-06
Prototype Winter Storm Severity Index The prototype WSSI utilizes National Weather Service (NWS) gridded forecasts from the National Digital Forecast Database (NDFD) for winter weather elements and combines this data with non-meteorological or static information datasets (e.g., climatology, land-use, population) to create a graphical depiction of anticipated overall impacts to society due to winter weather.The experimental WSSI was evaluated internally at several Weather Forecast Offices (WFOs) last winter and produced excellent results. In most cases, the predicted WSSI impact was precisely the impact experienced. Feedback on the results was reported back to the originators at WFO Burlington and further improvement in the methodology is expected to yield even better results this upcoming winter – 15 selected WFOs in the Contiguous United States (CONUS) Regions will display the prototype on public facing web pages to gather feedback. Dave Soroka 2016-11-17
Prototype NWS on Instagram Provide the use of Instagram on a limited basis as a prototype through NWSI 10-102. Initial participation includes 2 WFOs per region and National Centers/National Water center. Melinda Bailey 2016-10-19
Experimental Day 4-7 Winter Weather Outlook Product in the NDFD The National Centers for Environmental Prediction’s (NCEP) Weather Prediction Center’s (WPC) computes the probability of winter precipitation (snow/sleet) exceeding 0.25 inches (~6 mm) water equivalent over a 24hour period (Valid Time 12Z12Z)for Days 4, 5, 6,and 7. The National Weather Service (NWS) is adding this information to the National DigitalForecast Database (NDFD) as an experimental element. The outlook is prepared twice daily by WPC medium range forecasters. David Soroka 2016-09-20
Experimental Post Wildfire Debris Flow and Flash Flood Webpage experimental web page with information on recent burn scars that pose an increased risk to life and property. The web page includes an overview page showing burn scars across the Western United States. Individual burn scars linked from the overview page will have their individual web pages. Burn scar specific web page(s) will provide more detailed information including a map of the burn scar, road, communities, and other values at risk. Public safety information will be included to educate and inform the public. Matthew Solum 2016-09-15
Experimental Pacific Offshore Waters Forecast The Tropical Analysis and Forecast Branch (TAFB) is providing on an experimental basis East Pacific Offshore Waters Forecasts for the proposed area of responsibility (Figure 1). The proposed TAFB offshore waters area of responsibility encompasses the waters within 60 nautical miles offshore of Mexico from the Mexico/United States border south to 29N, and within 250 nautical miles south of 29N including Mexico, Central America, Colombia, and within 750 NM of Ecuador. The east Pacific offshore waters forecasts will provide enhanced marine services for the customers in the region. The experimental east Pacific offshore waters forecasts provide zone forecasts for 10-m winds, significant wave heights, primary swell direction, the dominant wave period, and significant weather for 17 zones in the proposed TAFB offshore waters area of responsibility (Figure 1). The list of offshore waters zones for within 60 NM of Mexico from the Mexico Border S to 29N and within 250 NM of Mexico S of 29N can be found in Table 1. The list of offshore waters zones for within 250 NM of Central America, Colombia and within 750 NM of Ecuador are listed in Table 2. Hugh Cobb 2016-08-19
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 3km AR NDFD Grids Operational 6 km digital datasets (and associated graphic forecast displays) integrated into NDFD for Alaska are available for the following elements: Maximum Temperature, Minimum Temperature, 12-hour Probability of Precipitation, Wind Speed, Wind Direction, Significant Wave Height, Hazards, Weather, Temperature, Dew Point, Wind Gust, Sky Cover, Apparent Temperature, Relative Humidity, Maximum Relative Humidity, Minimum Relative Humidity, Quantitative Precipitation Forecast (QPF) and Snow Amount. New experimental 3 km datasets for Alaska are now being provided for the same elements. Andy Horvitz 2016-07-12
Experimental East Pacific Offshore Waters Forecasts The Tropical Analysis and Forecast Branch (TAFB) is providing on an experimental basis East Pacific Offshore Waters Forecasts for the proposed TAFB offshore waters area of responsibility which encompasses the waters within 60 nautical miles offshore of Mexico from the Mexico/United States border south to 29N, and within 250 nautical miles south of 29N including Mexico, Central America, Colombia, and within 750 NM of Ecuador. The experimental east Pacific offshore waters forecasts provide zone forecasts for 10-m winds, significant wave heights, primary swell direction, the dominant wave period, and significant weather for 17 zones in the proposed TAFB offshore waters area of responsibility. Hugh Cobb 2016-07-01

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