May 22, 2013
Synopsis...
Additional Amplification Of The Large-Scale Upper Trough Covering
The U.S. Is Forecast This Period...As A Jet Streak Digs Sewd Across
The Nwrn Portion Of The Country And Into The Intermountain West.
As This Occurs...A Reinforcing Surge Of Low-Level Cold Air Is Forecast To Continue Spreading Sewd Across Intermountain West During The Day...And Then Across The Central Plains Region Through The Second Half Of The Period.
Showers And A Few Thunderstorms Will Again Be Possible In A Wsw-Ene Band From Ern Ok/Nern Tx Enewd Across The Tn And Oh Valleys...Though Modest Instability Should Hinder Appreciable Organization.
During The Second Half Of The Period...Convection Should Continue -- Particularly Over The Wrn Half Of The Area As The Reinforcing
Frontal Surge Arrives.
While Ample Shear And Stronger Ascent Associated With This Reinforcing System Would Suggest Some Threat For A Few Stronger Cells...Threat For Severe Storms Remains Low -- Insufficient To Warrant Issuance Of A 5% Threat Area This Forecast.
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