Weather Impacts BriefingApril 15, 2011NWS Nashville

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Round 1: Today

• Storms with brief gusty winds this morning• Wind Advisory in effect all day• Afternoon and evening main threat– SPC “Slight Risk” for most of Middle TN– Storm clusters with damaging winds possible– Isolated Supercells/tornadoes also possible– 1 to locally 3 inches of rain

• Severe potential depends on afternoon sun and gulf moisture “surge”

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Morning Radar

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SPC Outlook – Slight Risk for TN

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Forecast Rainfall Today

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Round 2: Mid/late Next Week (4/20 – 4/22)• Another storm system and cold front will

bring threat for more thunderstorms• Long range model shows two more possibly

significant storms the following week– Week of April 25– Flooding threat will increase with each successive

storm– CPC’s 8-14 day outlook for above average rainfall

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8-14 Day Rainfall Outlook

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Summary

• Severe storms and 1-3 inches of rain possible • Another round of storms mid/late next week• End of April also looks active/stormy– Will increase flood threat if we get too many

rounds spaced too close together

• Next webinar – 10am Monday

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