ACUS01 KWNS 170452
SWODY1
SPC AC 170450
DAY 1 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
1050 PM CST FRI NOV 16 2012
VALID 171200Z - 181200Z
...NO SVR TSTM AREAS FORECAST...
...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 TO 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.
..DISPIGNA/GRAMS.. 11/17/2012
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