SWODY3
SPC AC 170718
DAY 3 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
0218 AM CDT TUE APR 17 2007
VALID 191200Z - 201200Z
..NO SVR TSTM AREAS FORECAST...
..SYNOPSIS...
AMPLIFIED UPPER FLOW PATTERN OVER NOAM FORECAST TO CONTINUE THROUGH
DAY 3...WITH A WRN U.S. TROUGH...AND ERN U.S./WRN ATLANTIC
TROUGH...AND A RIDGE IN BETWEEN -- CENTERED OVER ONTARIO/SRN HUDSON
BAY REGION THROUGH THE PERIOD.
LACK OF APPRECIABLE INSTABILITY ACROSS MOST OF THE CONUS SHOULD
GENERALLY PRECLUDE THUNDERSTORMS. GREATEST INSTABILITY IS
ANTICIPATED OVER THE CENTRAL CONUS -- INVOF KS/OK -- WHERE AROUND
500 J/KG MEAN-LAYER CAPE MAY DEVELOP. HOWEVER...BOUNDARY LAYER
SHOULD REMAIN CAPPED -- WITH LARGE-SCALE SUBSIDENCE FORECAST TO
PREVAIL BENEATH UPPER RIDGE. THOUGH A FEW STORMS MAY DEVELOP DURING
THE AFTERNOON AND CONTINUE INTO THE EVENING ACROSS THIS AREA...LACK
OF FAVORABLE INSTABILITY AND RELATIVELY WEAK DEEP-LAYER FLOW
SUGGESTS LITTLE SEVERE THREAT THROUGH THE END OF THE PERIOD.
.GOSS.. 04/17/2007
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