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Tropical Depression EIGHT
Wind speed forecast and probability chart
Click image to zoom in
![[Chart of forecast and probable wind speeds]](/storm_graphics/AT08/refresh/AL0809I_sm2+gif/203114P_sm.gif)
About this product:
It shows the National Hurricane
Center (NHC) maximum 1-minute wind speed forecast as a broad blue line on a
chart of wind speed versus forecast period. The narrower lines, labeled 10%
and 20% (or 30%), indicate the probability that the maximum wind speed will
be some other magnitude than what the NHC has forecast. For example, the
cyclone could become stronger than the NHC has forecast, with there being a
10% chance that the wind speed will attain the level indicated by the 10%
line plotted above the NHC forecast. The probabilities are based on NHC
forecasts from 1988-1997. The data base excludes unnamed tropical
depressions. Current advisory information is shown near the bottom of the
chart. When applicable, the Saffir/Simpson Hurricane Scale is shown at
right. "Inland" is indicated for periods when the cyclone center is forecast
to be over land. "Ext" indicates that the NHC forecasts the cyclone to be
extratropical at that time.
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weather.gov
