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National Weather Service
Report - listing of Operational Products in database, sorted by product name.
Product Name Brief Description     Click Here for "Printable" version of this list.
SPC Day 1-3 Categorical Convective Outlooks The Storm Prediction Center Day 1-3 Categorical Outlook include a defined areas of general non-severe thunderstorms, and 5 risk categories of severe convection (1 - Marginal, 2- Slight, 3-Enhanced, 4-Moderate, and 5-High). These outlooks previously included a defined area of general thunderstorms, and only three defined risk categories of severe convective weather (SLIGHT, MODERATE, and HIGH). The addition of “Marginal” and “Enhanced” categories will more closely compare to the SPC Day 1-3 Narrative and Probabilistic Convective Outlooks, and WFO products.
SPC Day 4-8 Severe Weather Outlooks The Storm Prediction Center (SPC) Day 4-8 Severe Weather Outlooks are five separate graphics, one for each day (D4, D5, D6, D7, and D8), that depict areas of organized convection in the contiguous U.S. (CONUS). Two thresholds (15% probability and 30% probability) are used to depict these areas.The outlooks help users to adequately prepare several days in advance of an expected severe weather episode.The target audience includes NWS CONUS Weather Forecast Offices (WFOs), the public, media and emergency managers. products will provide five separate outlook graphics, one for each day (D4, D5, D6, D7, and D8).
SPC Dry Thunderstorm Fire Weather Outlook for Days 4 through 8 This product provides a daily categorical forecast of critical fire weather conditions for dry thunderstorms in the 4 through 8 day period.The National Centers for Environmental Prediction (NCEP) Storm Prediction Center (SPC) provides Day 1, Day 2 and Day 3-8 Fire Weather Outlooks (narrative and graphical) describing large-scale meteorological conditions in the lower 48 states which, when combined with the antecedent fuel conditions, favor the rapid growth and spread of a wildfire, should a fire ignition occur. These outlooks provide guidance for WFO forecasters and aid land management agencies in determining large-scale areas of fire danger risk.
SPC Enhanced Resolution Thunderstorm OutlookThe Storm Prediction Center (SPC) is the National Weather Service’s (NWS)center of expertise for forecasting convection, including economically-disruptive weather events such as tornadoes, large hail, damaging winds and heavy rainfall. Included within the SPC Severe Weather (Convective) Outlook (SWO) for the CONUS is a forecast for a 10% or greater probability of thunderstorms. Since these thunderstorm forecasts cover a 24 hour period with only the 10% probability contour, they provide little in the way of temporal or spatial resolution. The SPC Thunderstorm Outlook adds greater temporal and spatial resolution by depicting the expected areal coverage and probabilities for thunderstorms in 4 or 8 hour time periods. A 40% probability means that given similar environmental conditions, a thunderstorm would be observed at any one location (in either a county or city) within the 40% thunderstorm probability area four times out of ten, or 40% of the time. The greater temporal and spatial resolution of the SPC Thunderstorm Outlook will aid both NWS forecasters and NWS Partners in time-sensitive decisions related to thunderstorms, and ultimately provide greater safety for the United States public.
Special Marine WarningAn alphanumeric product issued from all WFOs with Marine responsibility. The product is issued to provide notification of short duration marine hazards such as waterspouts, thunderstorms, or hail.
SR CWSU Web-based TRACON Briefings The National Weather Service-Southern Region Center Weather Service Units (CWSU) may develop web-based briefings for Terminal Radar Approach CONtrol (TRACON) that aviation customers can use for tactical and strategic planning for operations. Maps and other graphics used in the web-based TRACON briefings are culled from various maps, models and charts available on the web. Variations in the presentation and depiction are authorized based on the needs and requirements of the specific ARTCC TMU and TRACON.
Standardized WFO, Regional, and National Climate Web PagesOnce implemented, this standardization of climate information (regarding what type is provided and where it?s located on NWS Web pages) will enable our users to consistently find climate data no matter which NWS level (WFO, regional, or national) they access via the Web.
Storm Based (Polygon) Special Weather Statements ERThreat based polygon warnings, or storm based warnings were implemented nationally in 2008 and essential to effectively warn for severe weather and flash floods. SB warnings show the specific meteorological threat area and are not restricted to geopolitical boundaries. By focusing on the true threat area, polygons help improve NWS warning accuracy and quality. ER initiated an experimental Polygon Storm Based Special Weather Statements (SBS) at Weather Forecast Offices (WFO) Blacksburg, VA and State College, PA in 2009 to promote increased accuracy of alerting the public to significant weather events. The SBS methodology allows the forecaster the opportunity to be spatially specific, eliminating large areas needlessly alerted when compared to issuing a county based SBS. Based on positive feedback from partners and users, the SBS has been transitioned to an official product for all ER WFOs. The Guidelines for SBS issuance are included in ER supplement 05-2010 Special Weather Statements.
Storm Prediction Center Day 3-8 Fire Weather Outlook GuidanceThis Product Description Document concerns SPC issuance of Day 3-8 fire weather outlooks to provide national guidance on a critical public safety issue for media, emergency managers, local National Weather Service Forecast Offices and ultimately the United States public. This product will help its customers to adequately prepare several days in advance for the potential of significant fire weather conditions. This product enhancement is aligned with the NOAA Strategic Objective for FY2005-2010 to ?Improve predictability of the onset, duration and impact of hazardous severe weather and water events? and its experimental initiation was part of the 2005 NWS Service Improvement Plan.
Surf Zone ForecastAn alphanumeric product issued from selected WFOs with coastal waters marine responsibility.  The product provides information on surf, water, any potential marine hazards such as rip currents, and the general weather conditions within the surf zone.
Surface AnalysisA graphical product depicting of significant surface features over the Atlantic and Pacific Ocean Basins north of 15 degrees north. Features such as the location of high and low pressure systems, frontal positions, and the analyzed locations of any existing Tropical Cyclones are included.
Surface Temperature Analysis and AnomalyThe Sea Surface Temperature Analysis (SST) and Sea Surface Temperature Anomalies (SSTA)are graphical products depicting sea surface water temperatures and departure from normal. WFO Honolulu produces the SST for the North Pacific (area bounded by equator to 55N and 110W to 160E) and the National Centers for Environmental Prediction (NCEP) Environmental Modeling Center (EMC) produces the SST for both the Atlantic and Eastern Pacific(area bounded by 10S to 50N and 0 to 180 longitude) and the SSTA product for the Atlantic and Eastern Pacific (area bounded by 10S to 50N and 0 W to 180 W longitude).
Tabular Product Evolution in eXtensible Markup Language - Derived Selected Cities Summary ProductsTPEX-derived Selected Cities Summary (SCS) products are created from three eXtensible Markup Language (XML) products: ObX - hourly observations FOX3 - highly summarized 3 day forecasts TEX - observed National high/low temperatures The TPEX-derived SCS products are created using an eXtensible Stylesheet Language Transformation (XSLT) style sheet and mimic the legacy SCS products
Tabular Product Evolution in eXtensible Markup Language Products Four eXtensible Markup Language (XML) products have been created using the forecast information contained in the National Digital Forecast Database (NDFD) for those cities currently contained in the Selected Cities Summary (SCS): ObX - hourly observations FOX3 - highly summarized 3 day forecasts FOX7 -highly summarized 7 day forecasts TEX - observed National high/low temperatures These products can be used as is, or user defined format products (text, HTML, etc.) can be created using eXtensible Stylesheet Language Transformation (XSLT) style sheets. We hope our users and partners will migrate away from legacy text products (e.g., SCS, etc.) to the new XML products.
Tactical Convective Hazard Product (TCHP)The TCHP provides a graphical presentation of thunderstorm hazards to aviation operations. It depicts current hazardous thunderstorms and a one-hour forecast of hazardous thunderstorm locations. The TCHP updates automatically every 5 minutes. The product is created from radar and lightning data as well as human-generated Convective SIGMET in-flight advisories (SIGMETs updated hourly).
Tactical Decision AidThe Tactical Decision Aid (TDA) web page for the Terminal Radar Approach Controller (TRACON) highlights forecasts of thunderstorm potential for the TRACON's aircraft arrival corner posts. These forecasts will be updated hourly during periods of convective weather (occurring or forecast) and every four hours during periods of no convective weather. Forecasts will cover a 4 hour time frame. Forecast output will be a color-coded, bar graph indicating the hourly probability of thunderstorm activity at each corner post during the upcoming 4 hour period.
TAFB Marine Weather Discussion (MIM)Plain language free text discussion of computer model trends which focuses on expected wind and sea conditions. The product is used as a coordination vehicle among the national centers and coastal Weather Forecast Offices.
Take Off Forecast ProductThe Take Off Forecast is a text product produced by an automated program that is then edited and/or augmented by Forecasters or Hydro-Meteorological Technicians (HMTs). The automated program uses FRH model data output for pressure, the Terminal Aerodrome Forecast (TAF) for winds, and the Aviation Model Output Statistics (MAV) for temps and comes up in an editable display with the last 6 hours of obs displayed. The forecast includes an hour by hour prediction of the winds, temps, altimeter setting, and, sometimes, a forecast of wet or dry runway conditions expected on the airport within a 6 hour period from the time of issuance. Forecasts are updated every 6 hours.
Terminal Aerodrome Forecast (TAF)The TAF is an operational forecast consisting of the expected meteorological conditions significant to a given airport or terminal. TAFs always include a forecast of surface wind speed and direction, visibility, and clouds.
Three-Month Climate Outlooks (Contiguous U.S. and Alaska).The Climate Prediction Center (CPC) issues a series of thirteen probabilistic three-month temperature and precipitation outlooks.
Three-Month Outlooks Discussion (Contiguous U.S. and Alaska).The Climate Prediction Center (CPC) provides a technical discussion of the meteorological and climatological basis for the outlooks.
Three-month Probability of Exceedence OutlooksThe Climate Prediction Center (CPC) issues a series of thirteen three-month probability of exceedence outlooks for temperature, precipitation, and heating and cooling degree days for the conterminous U.S.
Tropical Cyclone Advisory MessageThe Tropical Cyclone Advisory message (TCA) is an abbreviated alphanumeric text product which the National Hurricane Center (NHC) and the Central Pacific Hurricane Center (CPHC) issue.
Tropical Cyclone Cumulative Wind Distribution (CWD) GraphicThe CWD graphic is issued by the National Hurricane Center. It summarizes how the size of a storm has changed, and the areas potentially affected by sustained winds of tropical storm force (in orange) and hurricane force (in red) for tropical cyclones in the Atlantic and Eastern Pacific basins. This product is also issued for subtropical storms.
Tropical Cyclone Danger AreaThe Tropical Cyclone Danger Area is a graphical marine product depicting a tropical cyclone's track (out to 72 hours) and shades in a danger area determined by adding 100, 200, and 300 nautical miles plus the 34 knot wind radii to the 24-, 48-, and 72- hour forecast position respectively in the Atlantic and east Pacific. For the central Pacific the shaded danger area will varying in width dependent upon the hurricane specialists confidence in the track and the length of the 34 knot wind radii. In addition, areas of possible tropical cyclone genesis (out to 36 hours) are included and depicted as either a circular, rectangle, oval, or polygon shaped area. The product is prepared by the TPC and covers the entire Atlantic north of the equator and the Pacific north of the equator from the Mexican and Central America coast west to 140 west. CPHC prepares a separate chart for 140 west to the International Dateline north of the equator.

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