Weather Impacts BriefingApril 25th 2011NWS Nashville

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Summary

– Significant weather impacts through Wednesday– Severe weather more likely each day– Flood threat continues to increase• Flash Flood Watch late Tuesday through Wednesday

– Will outline general threats today and stress specifics on Tuesday’s call

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Rainfall Forecast Through Wed

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Flood Threat

– 2 to 4 inches of rain has already fallen northwest• Stewart, Montgomery and Robertson Counties

– Locally heavy rain and flooding possible today, tonight and Tuesday• Highest threat northwest Middle TN

– Main flood threat Tuesday Night into Wednesday• Widespread flash flooding possible

– Significant rises likely on area rivers

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SPC “Day 1” Outlook

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Damaging Wind Potential Through Tonight

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Tornado Potential Through Tonight

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Next 24 Hours

– A few strong storms and downpours this morning– Additional storms redevelop this afternoon• Locally severe with heavy rain

– Line of storms possible overnight into Tue AM• Highest severe potential west of I-65

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SPC Tuesday Outlook

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SPC Wednesday Outlook

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SPC Wednesday Severe Chances

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Tuesday and Wednesday Impacts• Scattered storms expected to redevelop

Tuesday Afternoon – a few could be severe• Widespread storms expected Tuesday night– Some likely severe– Flood threat high

• Main cold front comes through Wednesday– Continued high flood threat– Severe weather likely– Supercells

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Summary• Significant flood threat – especially from late

Tuesday through Wednesday• Slight Risk for severe storms through Tuesday

Night– Damaging winds main threat– Isolated tornadoes possible

• Moderate Risk for Severe Weather Wednesday• Call at 11 AM Tuesday

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