Saturday, May 21, 2011

May 21 Severe Weather

DISCUSSION
Dryline which has been the focus for severe storms yesterday will shift eastward before retreating west again.
Residue from MCS that moved through the central US yesterday will have potential for early morning thunderstorms. Ample and elevated CAPE will be present for a hail and damaging wind threat.
Given the moist atmosphere the storms would be in, there would be potential for the storms to persist. That would give the storms a large hail threat and a tornado threat.

By late afternoon, Central/East Kansas through East Nebraska and East OK/KS will be the feature of scattered thunderstorm development. Some of the storms will be supercells, especially in Oklahoma and Kansas. With CAPE from 2000 j/kg in Neb. to over 3000 j/kg in Oklahoma, there will be a threat for very large hail and damaging winds. Tornadoes are a possibility, especially over eastern Oklahoma and Kansas in the evening as the lower level jet stream strengthens.

Farther East and NE, into East Arkansas, East Missouri E/NE into portions of IL/IN and even west TN/KY, storms may develop separate from the ones mentioned above. There is potential for bowing segments with risk for damaging winds.
Today's Hail threat

Today's wind threat

Today's tornado threat

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