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Day 1 Convective Outlook  
NWS Storm Prediction Center Norman OK
1247 AM CDT Thu Aug 11 2022

Valid 111200Z - 121200Z

...THERE IS A MARGINAL RISK OF SEVERE THUNDERSTORMS ACROSS PORTIONS
OF THE INTERIOR PACIFIC NORTHWEST...

...SUMMARY...
Isolated strong storms -- with one or two capable of producing
strong/damaging wind gusts -- may occur over portions of the Pacific
Northwest.

...Synopsis...
Upper ridging will prevail over the central U.S. and into the
Rockies Thursday, while troughing digs southeastward across the
East, and persists just off the West Coast.

At the surface, a cold front is forecast to shift southward across
the Mid-Atlantic region and Midwest, while remaining nearly
stationary along the western fringe, over the Mid-Missouri Valley
vicinity. 

...Parts of eastern Washington/Oregon across Idaho into far western
Montana...
Ahead of an upper low off the Pacific Northwest Coast, weak ascent
within the diffluent flow regime will help contribute to isolated
storm development.  The convection will be fueled by diurnal
heating/destabilization, as afternoon mixed-layer CAPE values exceed
1000 to 1500 J/kg.  Similar to Wednesday, moderate mid-level
southwesterlies will be sufficient to support at least some updraft
organization, with potential evaporative enhancement in the
sub-cloud layer possibly contributing to a few instances of
strong/damaging wind gusts during the late afternoon and early
evening hours.

..Goss/Lyons.. 08/11/2022