[SWODY2] {Spam?} SWODY2

[Severe Weather Outlook - Day 2]

ACUS02 KWNS 231712
SWODY2
SPC AC 231711

DAY 2 CONVECTIVE OUTLOOK  
NWS STORM PREDICTION CENTER NORMAN OK
1111 AM CST THU MAR 23 2006

VALID 241200Z - 251200Z

...NO SVR TSTM AREAS FORECAST...

THE BULK OF A STRONGER BELT OF WESTERLIES HAS SHIFTED OUT ACROSS THE
ATLANTIC...AND THE LAST IN A SERIES OF ASSOCIATED SHORT WAVE TROUGHS
ASSOCIATED WITH THIS FEATURE IS FORECAST TO PROGRESS EAST OF THE
SOUTH ATLANTIC COAST BY MID DAY FRIDAY.  IN ITS WAKE... MODELS
INDICATE THAT THE HIGHER LATITUDE BLOCKING PATTERN WILL PERSIST...
WITH AN UPPER HIGH REMAINING CENTERED OVER THE NORTH CENTRAL
CANADIAN PROVINCES...WHILE CLOSED LOWS LINGER OVER THE NORTHEAST
PACIFIC AND OHIO VALLEY.

UPPER FLOW REGIME WILL CONTINUE TO SUPPORT A LARGE COLD SURFACE
RIDGE ACROSS MUCH OF EASTERN NORTH AMERICA THROUGH THE WESTERN GULF
OF MEXICO/BAY OF CAMPECHE AND YUCATAN PENINSULA. SOUTHERN PORTION OF
THIS RIDGE MAY BEGIN TO WEAKEN IN RESPONSE TO SHORT WAVE TROUGH
PROGRESSING THROUGH RELATIVELY WEAK BELT OF SUBTROPICAL WESTERLIES
ACROSS THE MEXICAN PLATEAU.  HOWEVER... EFFECTS OF SURFACE RIDGE
WILL MINIMIZE CONVECTIVE POTENTIAL ACROSS MUCH OF THE NATION EAST OF
THE ROCKIES THROUGH THIS PERIOD AND BEYOND.

MODELS DO SUGGEST A MORE PROGRESSIVE UPPER FLOW MAY BEGIN TO DEVELOP
FRIDAY ACROSS THE NORTH CENTRAL/NORTHEAST PACIFIC INTO THE NORTHERN
PACIFIC COAST STATES.  IN RESPONSE TO AN UPSTREAM IMPULSE DIGGING TO
THE SOUTH/EAST OF THE ALEUTIANS...A VIGOROUS SHORT WAVE
TROUGH...CURRENTLY EMBEDDED WITHIN BROADER CIRCULATION OVER THE
NORTHEAST PACIFIC...IS PROGGED TO APPROACH THE NORTH CENTRAL PACIFIC
COAST. THIS PROBABLY WILL NOT OCCUR UNTIL LATE FRIDAY NIGHT/EARLY
SATURDAY...BUT MODELS SUGGEST TROUGH WILL BE PRECEDED
INLAND...ACROSS WASHINGTON/OREGON...BY A WEAKER IMPULSE.

...PACIFIC NORTHWEST COAST STATES...
MID-LEVEL COOLING ASSOCIATED WITH THE LEAD IMPULSE IS EXPECTED TO
CONTRIBUTE TO SUFFICIENT DESTABILIZATION FOR SCATTERED AFTERNOON
THUNDERSTORMS...MAINLY ACROSS COASTAL AND INTERIOR SECTIONS OF
WASHINGTON/OREGON.  WEAK INSTABILITY WILL LIMIT STRENGTH OF
UPDRAFTS...BUT THERMODYNAMIC ENVIRONMENT COULD BE SUFFICIENT FOR
SOME SMALL HAIL OR GRAUPEL REACHING THE SURFACE IN STRONGER CELLS.
MOST STORMS LIKELY WILL DIMINISH AFTER DARK FRIDAY EVENING...BUT  A
FEW STORMS MAY APPROACH SOUTHERN OREGON/NORTHERN CALIFORNIA COASTAL
AREAS WITH STRONGER FORCING LATE FRIDAY NIGHT/EARLY SATURDAY.

..KERR.. 03/23/2006