Severe thunderstorms capable of producing damaging wind gusts, large hail, and a few tornadoes, are likely to develop this afternoon from parts of the lower Ohio Valley into the southern Plains. An Enhanced Risk (Level 3 of 5) outlook has been issued. Further north, widespread rain showers are expected across portions of the Great Lakes and Northeast U.S. Read More >
"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 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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