SPC AC 070544
DAY 1 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
1144 PM CST FRI NOV 06 2009
VALID 071200Z - 081200Z
...NO SVR TSTM AREAS FORECAST...
...PACIFIC NW...
A SERIES OF WEAK IMPULSES WILL TRANSLATE ACROSS THE ERN PACIFIC INTO
THE NWRN CONUS OVER THE NEXT FEW DAYS AS HEIGHTS GRADUALLY LOWER AND
THE PRIMARY JET CORE SAGS SWD INTO CA. DEEP WLY ONSHORE FLOW WILL
MAINTAIN WEAK BUOYANCY ALONG THE COAST AS MARINE LAYER IS FORCED
AGAINST THE CASCADE RANGE. FORECAST SOUNDINGS ALONG THE COAST
SUGGEST LOW-MID LEVEL LAPSE RATES WILL REMAIN SUFFICIENTLY STEEP FOR
ROBUST UPDRAFTS AND POSSIBLE THUNDERSTORM DEVELOPMENT. WITH SBCAPE
VALUES LIKELY ON THE ORDER OF 200-300 J/KG...CLOUD TOPS COULD EASILY
EXCEED LEVELS NECESSARY FOR LIGHTNING DISCHARGE.
...ELSEWHERE...
DRY CONTINENTAL AIRMASS WILL CONTINUE ACROSS MOST OF THE
ROCKIES...EAST TO THE ATLANTIC COAST. THE ONLY POSSIBLE EXCEPTION
WHERE ISOLATED THUNDERSTORMS COULD DEVELOP WILL BE AHEAD OF A STRONG
SHORTWAVE TROUGH OVER NRN MEXICO. HOWEVER...THIS FEATURE WILL NOT
AFFECT TX UNTIL LATER IN THE DAY2 PERIOD.
..DARROW/HURLBUT.. 11/07/2009
NOTE: THE NEXT DAY 1 OUTLOOK IS SCHEDULED BY 1300Z
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