May 18, 2013
Synopsis…
A Strong Short Wave Trough Is Expected To Impact The Pacific
Northwest Through The Period. Steepening Lapse Rates Owing To
Cooling Temperatures Aloft In Combination With Upslope/Onshore Flow May Be Sufficient For A Few Lightning Strikes Near The Coast... Particularly In The Latter Half Of The Period As The System Progresses Inland. Sparse Instability Is Expected To Hinder Severe
Potential.
Farther East...A Weak Upper Trough Will Meander Off The Atlantic
Coast. Coastal And Offshore Thunderstorms May Continue Along A
Subtle Sw-Ne Area Of Surface Convergence Invof Mlb And Extending
Well Offshore Of The Carolinas. Weak Shear And Inversions At 850 And 700 Mb /Sampled Well On The 00z Jax Sounding/ Will Preclude Severe Thunderstorm Development.
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