Isolated to scattered severe thunderstorms are expected Wednesday from the ArkLaTex and Lower Mississippi Valley northeastward through the Ohio Valley and Mid-Atlantic. Thunderstorms may produce heavy to excessive rain that could pose a flooding threat from east Texas into Upstate New York. A moderate atmospheric river will bring heavy snow and high winds to the Northwest U.S. Read More >
Eastern Region Headquarters
Regional Headquarters
"How to Interpret the Hydrologic Ensemble Forecast Service (HEFS) Short-Term Probabilistic Guidance" training materials at COMET (free registration required)
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Map Last Updated:
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Map Legend
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Chance of Exceedance
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River Forecast Centers
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30%
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Level
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70%
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Action
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Minor Flood
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Moderate Flood
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Major Flood
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 = less than 30% chance of reaching Action level |
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 = no critical levels defined for this point |
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US Dept of Commerce
National Oceanic and Atmospheric Administration
National Weather Service
Eastern Region Headquarters
630 Johnson Ave., Ste. 202
Bohemia, NY 11716
631-244-0100
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