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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.
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.
Tropical Cyclone Discussion (TCD)The TCD is a text product prepared by the National Hurricane Center (NHC) and Central Pacific Hurricane Center (CPHC) for tropical cyclones in their respective basin of responsibility. The TCD provides forecasters' reasoning behind the analysis and forecast of a tropical cyclone. Discussions include prognostic reasoning; objective techniques employed; NHC, CPHC, and Hydrometeorological Prediction Center guidance used; coordinated 12-, 24-, 36-, 48-, 72-, 96-, and 120-hour tropical cyclone forecast positions and maximum sustained wind speed forecasts; other meteorological decisions; and plans for watches and warnings. This product is also issued for subtropical storms.
Tropical Cyclone Forecast Advisories (TCM)The is a text product prepared by the National Hurricane Center (NHC) and the Central Pacific Hurricane Center (CPHC) for tropical cyclones in their respective basin of responsibility. TCMs are issued for the Atlantic and eastern Pacific basins by the NHC. TCMs are issued for the central Pacific by the CPHC. The product title depends on the intensity of the tropical cyclone, to include: Tropical Depression Advisory, Tropical Storm Advisory, Hurricane/Typhoon Advisory. This product is also issued for subtropical storms.
Tropical Cyclone Position Estimate (TCE)The Tropical Cyclone Position Estimate (TCE) is an event-driven (non-routinely issued) alphanumeric product comprised of information concerning the location of the center of a tropical cyclone as determined by land-based radar fixes. The National Hurricane Center (NHC), the Central Pacific Hurricane Center (CPHC), and the Weather Forecast Office (WFO) Guam prepare TCEs on an event-driven basis for tropical cyclone activity within the effective range of land base radars. NHC issues TCEs for tropical cyclone activity in the Atlantic and eastern north Pacific (north of the equator and east of 140 degrees west longitude) basins. CPHC issues TCEs for tropical cyclone activity in the central North Pacific (north of the equator between 140W and 180W longitude) basin and WFO Guam for the northwest Pacific (U.S. territories or the Republic of Palau, Federated States of Micronesia, and Republic of the Marshall Islands north of the equator and from 130W - 180W longitude).
Tropical Cyclone Public Advisories (TCP)This is a 2015 update to the existing to operational product. PPD updated to change issuance times.
Tropical Cyclone Report (TCR)The Tropical Cyclone Report (TCR) is a post-event overview of a tropical cyclone comprised of a narrative describing the overall storm and a detailed listing of 6-hourly location and intensity data in both text and graphic format. The National Hurricane Center (NHC) and the Central Pacific Hurricane Center (CPHC) prepare TCRs within 90 days of any tropical cyclone that occurs within their respective Area of Responsibility (AOR). NHC issues TCRs for tropical cyclone activity in the Atlantic and eastern north Pacific (north of the equator and east of 140 degrees west longitude) basins. CPHC issues TCRs for tropical cyclone activity in the central North Pacific (north of the equator between 140W and 180 degrees west longitude) basin.
Tropical Cyclone Storm Surge ProbabilitiesThe product consists of a graphic and GRIB2 data for creating the graphic for the Gulf of Mexico and Atlantic coastal areas of the continental United States. The graphic shows probabilities, in percent, of storm surge exceeding 2 feet through 25 feet, at 1 foot intervals (e.g., the probabilities in percent, of storm surge exceeding 2 feet, 3 feet, 4 feet, Ö, 25 feet). This storm surge graphic is based upon an ensemble of Sea, Lake, and Overland Surge from Hurricanes (SLOSH) model runs using the National Hurricane Center (NHC) official advisory and accounts for track, size, and intensity errors based on historical errors.
Tropical Cyclone Summary-Fixes (TCS)The TCS is an alphanumeric product which the Central Pacific Hurricane Center (CPHC) provides when there is a classifiable (using the Dvorak technique) tropical cyclone activity in the north central or south Pacific. The TCS is a satellite-based estimate of tropical cyclone location, movement, and intensity with a brief remarks section. Pacific Region's CPHC prepares TCS for a portion of their area of responsibility (AOR). The AORs for CPHC/Weather Forecast Office (WFO) Honolulu (CPHC is collocated with the Weather Forecast Office Honolulu) varies depending upon the program (tropical cyclone, aviation, marine, public, and satellite). For TCS program, CPHC's AOR is the area north of the equator between 140W - 180 longitude and from the equator to 25 S latitude between 120W to 160E.
Tropical Cyclone Surface Wind Speed Probabilities (TCSWSP) for the North Pacific Ocean in the NDFDThis update makes the TCSWSP in the NDFD for the North Pacific Ocean operational for the 2010 hurricane season. The TCSWSP elements depict probabilities, in percent, of sustained surface wind speeds. These probabilities are provided for wind speed thresholds equal to or exceeding 34-, 50-, and 64-knots. These wind speed probabilities are based on the track, intensity, and storm structure (size in terms of wind radii) uncertainties in the official tropical cyclone forecasts. TCSWSP elements covering the North Pacific Ocean are available in NDFD in experimental status. Similar elements for the continental U.S. are available in NDFD in operational status.
Tropical Cyclone Surface Wind Speed Probabilities - GraphicalThe Tropical Cyclone Surface Wind Speed Probabilities product displays probabilities in percent of sustained wind speeds equal to or exceeding 34-, 50-, and 64-knot wind speed thresholds. These wind speed probabilities are based on the track, intensity, and wind structure uncertainties in the official forecasts from the National Hurricane Center, Central Pacific Hurricane Center, and the Joint Typhoon Warning Center.
Tropical Cyclone Surface Wind Speed Probabilities - TextThe Tropical Cyclone Surface Wind Speed Probabilities text product contains two parts. The first part, called Maximum Wind Speed (Intensity) Probability Table, provides over a five day period what the probabilities are for the maximum sustained (1-minute average) wind speed of a tropical cyclone for various intensity categories. A second part, called Wind Speed Probability Table for Specific Locations, provides probabilities, in percent, of sustained wind speeds equal to or exceeding 34-, 50-, and 64-knot wind speed thresholds. These wind speed probabilities are based on the track, intensity, and wind structure uncertainties during recent years in the official forecasts from the National Hurricane Center and the Central Pacific Hurricane Center and are computed for coastal and inland cities as well as offshore locations (e.g., buoys).
Tropical Cyclone Surface Wind Speed Probabilities in NDFDThe NWS provides access to operational and experimental gridded forecasts of weather elements (e.g., maximum temperature, sky cover) through the National Digital Forecast Database (NDFD). The NDFD contains a seamless mosaic of digital forecasts from NWS field offices working in collaboration with the National Centers for Environmental Prediction (NCEP). The Tropical Cyclone Surface Wind Speed Probabilities (TCSWSP) is an NCEP, event-driven product. The TCSWSP is an experimental product which will be made available via the NDFD. This product depicts probabilities, in percent, of sustained surface wind speeds. These probabilities are expressed for wind speed thresholds equal to or exceeding 34-, 50-, and 64-knots. These wind speed probabilities are based on the track, intensity, and wind structure (size in terms of radii) uncertainties in the official forecasts from the National Hurricane Center (NHC). The product will cover the continental U.S. and adjacent waters.
Tropical Cyclone Threat Grids in the NDFDThe Tropical Cyclone (TC) Threat grids provide the worse-case plausible scenario or threat associated with the following hazards; wind, storm surge, flooding rain, and tornado. There are five levels to describe each TC Threat element; None, Low, Moderate, High, Extreme. The methodology for creating the grids takes in account the forecast magnitude and the associated forecast uncertainty for each of the hazards. The grids are produced only by coastal WFOs along the Atlantic and Gulf coasts as well as San Juan, PR whenever tropical cyclone watches and warnings are in effect for their area of responsibility
Tropical Cyclone Track and Watch/Warning GraphicUPDATES INCLUDE: Addition of CPHC as an issuing office Addition of Potential Tropical Cyclone and Post-Tropical Cyclone system types that necessitate issuance of the graphics This product is a graphical representation of text messages issued by NHC. It provides critical information on the forecast path of the tropical cyclone, forecast track uncertainty, and watches and warnings issued by NHC.The Tropical Cyclone Track and Watch/Warning Graphics are prepared by the National Weather Service (NWS) National Hurricane Center (NHC) and Central Pacific Hurricane Center (CPHC) for tropical cyclones in the Atlantic basin and eastern and central North Pacific basins. The graphics contain forecast track, an error cone along the track as well as coastal tropical storm and hurricane watches/warnings. To form the error cone, a set of imaginary circles are placed along the forecast track at the 12, 24, 36, 48, 72, 96, and 120 h positions, where the size of each circle is set so that it encloses 67% of the previous five years official forecast errors. The cone is then formed by smoothly connecting the area swept out by the set of circles. Both 3-day and 5-day versions of this product are created as well as that add the initial wind field to the other elements in the graphics. This product is also issued for all systems that NHC or CPHC are writing advisories, including subtropical storms, potential tropical cyclone, tropical cyclones, and post-tropical cyclones.
Tropical Cyclone Update (TCU)The TCU is a brief alphanumeric text product which the National Hurricane Center (NHC) and the Central Pacific Hurricane Center (CPHC) issue to inform customers of unexpected or sudden changes in a tropical cyclone or to post or cancel watches and warnings. NHC and CPHC issue TCUs on an event-driven basis in lieu of or preceding special advisories.
Tropical Cyclone Watch/Warning ProductThe Tropical Cyclone Watch/Warning product (TCV) is based upon the Valid Time Event Code (VTEC). It summarizes all new, continued, and cancelled tropical cyclone watches and warnings issued by: the National Hurricane Center (NHC) for the U.S. Atlantic and Gulf coasts, Puerto Rico and U.S. Virgin Islands; and the Central Pacific Hurricane Center (CPHC) for the main islands of Hawaii.
Tropical Cyclone Wind Field GraphicThis update makes the Tropical Cyclone Wind Field Graphic (TCWFG) issued by the Central Pacific Hurricane Center operational for the 2010 hurricane season. This graphic illustrates the areas potentially being affected by tropical cyclone sustained winds of varying force. The graphic also shows an approximate representation of coastal areas under a hurricane warning, hurricane watch, tropical storm warning and tropical storm watch. The white dot indicates the current position of the center of the tropical cyclone, and the dashed black line shows the history of the center of the tropical cyclone.
Tropical Pacific Mean Sea-Surface Temperature (SST) OutlookThe Climate Prediction Center's climate outlook techniques rely significantly upon the slowly varying global SST field and do not have usable accuracy at long lead times. These SST outlooks make tangible the results of research activities by scientists.
Tropical Streamline Surface AnalysisA graphic product issued from the WFO Honolulu, HI, that provides information on significant surface features over the Pacific Ocean Basin such as location of high and low pressure systems, areas of gale strength winds, and the Inter-tropical Convergence
Tropical Surface AnalysisA graphic product issued from the Tropical Prediction Center and the WFO Honolulu, HI, that provides a depiction of significant surface features over the Tropical Atlantic and Pacific Ocean Basins. Features such as the location of high and low pressure s
Tropical Weather Discussion (TWD)The TWD is an alphanumeric product providing information on current atmospheric conditions at the surface and aloft such as tropical cyclones, mesoscale and synoptic scale features, and areas of shallow and deep convection. This product is prepared over the tropical and subtropical Atlantic and Pacific ocean areas by the Tropical Prediction Center and the Honolulu Weather Forecast Office.
Tropical Weather Outlook (TWO)The Tropical Weather Outlook (TWO) provides probabilistic information, in 10-percent increments, about a systemís potential for developing into a tropical cyclone. The forecast and discussion is provided on a disturbance-by disturbance basis out to both 48 hours and 120 hours. The National Hurricane Center issues TWOs for the Atlantic and east Pacific basins while the Central Pacific Hurricane Center issues TWOs for the central Pacific basin.
Tropical Weather Summary (TWS)PDD updated for the following: Effective with the 2009 season, the product changes from a narrative to a mainly tabular format. The TWS is a monthly alphanumeric product issued by the National Hurricane Center (NHC) and the Central Pacific Hurricane Center (CPHC) to summarize tropical cyclone activity for the previous month. NHC issues summaries for tropical cyclone activity over the Atlantic and eastern north Pacific (north of the equator and east of 140W longitude) basins. CPHC issues summaries for tropical cyclone activity over the central North Pacific (north of the equator between 140W and 180W longitude) basin. The centers issue new summaries the first day of each month from June through December. The last TWS of the tropical cyclone season (December issuance) covers activity for the entire season from June through the end of November. Effective with the 2009 season, the product changes from a narrative to a mainly tabular format.

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