May 19, 2013
A Powerful Shortwave Trough Will Dig Sewd Across The Upper Ms Valley And Into The Oh Valley On Fri...Moving Rapidly To The E Coast By Sat Morning.
At The Surface...A W-E Oriented Cold Front Will Sag Slowly Swd Across Ern Tx And Across The Cntrl Gulf Coast States.
While Dewpoints In The 50s Will Be Common...Instability Will Be
Insufficient For Thunderstorms.
To The W...A Weak Shortwave Trough Will Move Ewd Across Srn Ca...Nrn Mexico And Az Late Fri...Increasing The Chances Of Precipitation.
Forecast Soundings Indicate Very Little Instability.
However...An Isolated Lightning Strike May Occur Across Sern Az Where Forcing Will Be Maximized.
Elsewhere...Another Trough Will Affect The Pacific Nw With Cold Air
Aloft Creating Weak Instability Mainly Offshore. Forcing Will Generally Be Weak With This Trough...And An Isolated Lightning Strike Could Occur Offshore Fri Night.
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