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34-knot Wind Speed Probability
Wind Speed
Wind History
Google Maps API Warnings and Track Forecast Cone
Interactive Map
Warnings and 5-Day Cone
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Surface Wind Field
Warnings and
Surface Wind

Hurricane Wind Speed Probability
Hurricane Wind Speed Probability

0 12 24 36 48 60 72 84 96 108 120 hours Loop
50-knot Wind Speed Probability
50-knot Wind Speed Probability
0 12 24 36 48 60 72 84 96 108 120 hours Loop
Trop Storm Wind Speed Probability
Tropical Storm Wind Speed Probability

0 12 24 36 48 60 72 84 96 108 120 hours Loop

[Image of probabilities of 50-kt winds]
Click Here for a Printer Friendly Graphic

Download 120-h GIS data: 0.1 degree .shp  0.5 degree .shp

About this product:

Note: The time of the tropical cyclone's center location at the bottom of the graphic will be 3 hours earlier than the time of the current advisory. The forecast cycle for each advisory begins 3 hours prior to the issuance of the advisory products.

These graphics show probabilities of sustained (1-minute average) surface wind speeds equal to or exceeding 50 kt (58 mph). These wind speed probability graphics are based on the official National Hurricane Center (NHC) track, intensity, and wind radii forecasts, and on NHC forecast error statistics for those forecast variables during recent years. Each graphic provides cumulative probabilities that wind speeds of at least 58 mph will occur during cumulative time periods at each specific point on the map. The cumulative periods begin at the start of the forecast period and extend through the entire 5-day forecast period at cumulative 12-hour intervals (i.e., 0-12 h, 0-24 h, 0-36 h, ... , 0-120 h). An individual graphic is produced for each cumulative interval, and the capability to zoom and animate through the periods is provided. To assess the overall risk of experiencing winds of at least 58 mph at any location, the 120-h graphics are recommended.

These probabilities will be updated by the NHC with each advisory package for all active tropical cyclones in the Atlantic and eastern North Pacific basins. While separate graphics are focused on each individual tropical cyclone, probabilities resulting from more than one active tropical cyclone may be seen on each graphic.

It is important for users to realize that wind speed probabilities that might seem relatively small at their location might still be quite significant, since they indicate that there is a chance that a damaging or even extreme event could occur that warrants preparations to protect lives and property.

Additionally, these probability products are available on the National Weather Service's National Digital Forecast Database (NDFD) graphical tropical webpage.