Sunday, May 4, 2008

Tomorrow's Severe: Day 1 of 4

A low pressure will begin developing along an old frontal boundary tomorrow, and will spark off some storms. I do not think tomorrow will be a huge severe day but some severe is expected. Here is what I think will happen:
-Moisture return from the gulf has set up over the southern Plains. So it appears that south of Nebraska dew points will be into the 60s by tomorrow evening. This along with plenty of daytime heating tomorrow will result in storms popping by evening. CAPE values are expected to be over 1000 in much of the slight risk areas with LI's in the -6 to -8 range, so things will definitely be unstable enough for scattered storms with large hail/damaging winds by evening.
-Tomorrow night wind shear will increase some in the warm sector. This will enhance the threat for large hail and may also introduce a tornado threat.
-In summary scattered storms will develop in the warm sector with a hail/high wind risk with the stronger storms. Tomorrow night the wind threat will increase and isolated tornadoes are possible as wind shear increases.

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