Severe Weather Threat Day 2 Sun May 12

A Large Upper Trough/Low Over Ern Noam Will Continue Making Slow Ewd Progress...While An Ern Pacific Trough Advances More Quickly Ewd Toward The W Coast. In Between...Ridging Will Prevail/Slide Ewd Across The Intermountain West Through The Period.

At The Surface...A Cold Front Is Forecast To Advance Across The Nwrn
U.S. Ahead Of The Approaching Upper Trough...While A Lee Trough
Persists Across The High Plains. Showers And Embedded Thunderstorms Are Forecast Across Parts Of The Nwrn U.S. -- Particularly Ern Portions Of Wa/Oregon And Into Id/Wrn Mt...But Instability Is Forecast To Be Insufficient To Support Any Appreciable Severe Threat.

Farther E...
The Main Surface Cold Front Is Progged To Reside Over The Wrn Atlantic By The Start Of The Period...Trailing Wwd Across Central Fl And Into The Gulf Of Mexico. During The Day...The Front Will Advance Slowly Swd Across The Fl Peninsula -- With Showers And A Few Thunderstorms Likely Near/S Of The Front. With Generally Weak Flow Aloft Forecast On The Warm Side Of The Front And Only Modest
Instability Expected...Severe Weather Potential Is Not Evident Attm.


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