May Summary

For being a spring month known for its rough weather, May was relatively quiet this year.  The Louisville NWS office issued 47 severe weather warnings during the entire month (the fewest in May since 2009) and severe weather occurred on only five days of the month.  The most widespread event took place during the pre-dawn hours of the 5th when a large complex of storms developed over southern Illinois and southern Indiana and swept southeastward across central Kentucky.  There were many reports of damaging winds, including 70 mph gusts from a downburst between Cave City and Glasgow, KY.

The other most significant event took place on the 29th as thunderstorms developed and regenerated over Louisville, dumping 2 to 4 inches of rain in about three hours from southern Harrison County, IN, to western Oldham County.  Flash flooding developed in urban Louisville, with several cars becoming stranded and their drivers needing rescue.

Memorial Day weekend felt more like the Fourth of July as a hot dome of air settled over the Ohio and Tennessee Valleys.  Temperatures soared into the upper 80s and lower 90s in many locations from the 25th to the 28th.  The hot air combined with nearly calm winds led to Air Quality Alerts in Louisville.

Location Average Temperature Departure from Normal Precipitation Departure from Normal
Bowling Green 72.6° +6.2° 3.31" -2.32"
Frankfort 68.5° +4.6° 5.07" +0.22"
Lexington 68.7° +4.5° 3.60" -1.66"
Louisville Bowman 73.1° +6.8° 8.40" +3.28"
Louisville OFFICIAL 72.6° +5.5° 7.87" +2.60"


2nd:  Warm low of 71° at Louisville, warm low of 66° at Lexington
3rd:  Warm low of 68° at Louisville
13th:  Record rainfall of 1.89" at Louisville
25th:  Warm low of 73° at Louisville

4th warmest May on record at Bowling Green
8th warmest May on record at Frankfort
3rd warmest May on record at Louisville

Madison, Indiana May 1, 2012

A severe storm strikes Madison, Indiana on May 1.  Photo forwarded to us by Reed Yadon/WHAS

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