SWODY2
SPC AC 171655
DAY 2 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
1155 AM CDT TUE MAR 17 2009
VALID 181200Z - 191200Z
...NO SVR TSTM AREAS FORECAST...
...SYNOPSIS...
UPR TROUGH CURRENTLY EVOLVING ACROSS THE NRN PLNS/CNTRL CANADIAN
PRAIRIES WILL AMPLIFY AS IT CONTINUES ACROSS ERN CANADA AND THE
GRTLKS/MIDWEST ON WEDNESDAY. ASSOCD CDFNT WILL MOVE S/SEWD INTO NEW
ENGLAND...MIDWEST...OH VLY AND THE SRN PLNS THROUGH THE DAY AND BE
THE FOCUS FOR CONVECTION.
...OZARKS NEWD INTO THE MIDWEST...
THOUGH SFC DEW POINTS HAVE BEEN RECOVERING ACROSS THE REGION...MOIST
LAYER IS QUITE SHALLOW AND SHOULD REMAIN THAT WAY THROUGH WEDNESDAY.
WHILE THIS WILL LIMIT OVERALL INSTABILITY...LAPSE RATES WILL REMAIN
QUITE STEEP AND AS MODEST COLUMN MOISTENING OCCURS ASSOCD WITH THE
ARRIVAL OF THE UPR WAVE...BANDS OF SHOWERS/TSTMS WILL DEVELOP
ALONG/BEHIND THE FRONT. IN ADDITION TO THE LIMITED BUOYANCY...
VERTICAL SHEAR WILL BE WEAK WITH ONLY WEAKLY ORGANIZED STORMS
EXPECTED AT BEST. THE STRONGER UPDRAFTS MAY YIELD MARGINALLY SVR
HAIL/GUSTY WINDS FROM PARTS OF WRN IND SWWD INTO THE OZARK PLATEAU
LATE WEDNESDAY AFTN AND EARLY EVENING.
...S FL...
MODIFIED S ATLANTIC BOUNDARY LAYER...EXHIBITING WEAK LAPSE
RATES/MINIMAL INSTABILITY WILL BE MAINTAINED ACROSS S FL ON
WEDNESDAY. SCTD DIURNALLY-ENHANCED SHOWERS AND TSTMS WILL BE
POSSIBLE WITHIN THIS REGIME...BUT STORMS WILL REMAIN SUB-SVR.
..RACY.. 03/17/2009
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