SPC AC 220550
DAY 1 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
1150 PM CST SAT FEB 21 2009
VALID 221200Z - 231200Z
...NO SVR TSTM AREAS FORECAST...
...SYNOPSIS/FORECAST...
WHILE A POTENT UPPER TROUGH CROSSES THE GREAT LAKES REGION/NEW
ENGLAND STATES...AN UPPER TROUGH IN THE EASTERN PACIFIC AROUND
135-140 W WILL SLOWLY PIVOT EASTWARD AS A STRONG UPPER JET SPREADS
NORTHEASTWARD INLAND ACROSS NORTHERN CA/ORE. ISOLATED TSTMS WILL BE
A POSSIBILITY FROM COASTAL NORTHERN CA TO WESTERN ORE/PERHAPS
SOUTHERN COASTAL WA AND THE ADJACENT OFFSHORE WATERS MAINLY THIS
AFTERNOON/EARLY EVENING. IN FACT...STEEP MID LEVEL LAPSE RATES AND
00Z NAM/GFS DEPICTIONS OF SBCAPE UP TO A COUPLE HUNDRED J/KG IMPLY A
FEW STRONGER STORMS MAY BE CAPABLE OF SMALL HAIL ACROSS WESTERN ORE
THIS AFTERNOON.
ELSEWHERE...IN THE WAKE OF A COLD FRONT EXITING THE EASTERN
SEABOARD...COOL/STABLE CONDITIONS ARE EXPECTED TO PRECLUDE TSTMS
ACROSS THE REMAINDER OF THE CONUS.
..GUYER.. 02/22/2009
CLICK TO GET WUUS01 PTSDY1 PRODUCT
NOTE: THE NEXT DAY 1 OUTLOOK IS SCHEDULED BY 1300Z
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