[SWODY1] SWODY1

[Severe Weather Outlook Day 1]

ACUS01 KWNS 151606
SWODY1
SPC AC 151604

DAY 1 CONVECTIVE OUTLOOK  
NWS STORM PREDICTION CENTER NORMAN OK
1004 AM CST FRI DEC 15 2006

VALID 151630Z - 161200Z

...NO SVR TSTM AREAS FORECAST...

INTENSE SYSTEM THAT MOVED ONTO PAC NW COAST LAST NIGHT CURRENTLY
MOVING ACROSS SRN PRAIRIE PROVINCES OF SWRN CANADA WITH A STRONG
COLD FRONT TRAILING SWWD FROM CENTRAL MT TO NWRN NV. ANOTHER
VIGOROUS UPPER TROUGH INITIALLY GREAT LAKES ROTATES EWD ACROSS NERN
U.S. BY TONIGHT.

BOTH OF THE UPPER SYSTEMS NRN TIER OF CONUS  WILL BE ACCOMPANIED BY
ONLY MARGINAL INSTABILITY.  OTHER THAN ISOLATED LIGHTNING STRIKES
ACROSS NERN U.S. WITH UPPER TROUGH AND POSSIBLY NEAR FRONTAL BAND MT
TO NV...THE ONLY AREA ATTM THAT THERE APPEARS A CHANCE OF MORE THAN
A FEW STRIKES WILL BE THE AREA OF COASTAL OR/WA WHERE A CONTINUED
BUT WEAKENING ONSHORE FLOW OF MOIST/MARGINALLY UNSTABLE COLD AIR
WILL PERSIST THRU THE PERIOD AHEAD OF AMPLIFYING UPPER TROUGH ALONG
THE WEST COAST.

VERY MOIST AIR REMAINS S FL...HOWEVER INSTABILITY AND SHEAR HAS
WEAKENED PAST 24 HOURS.  A FEW THUNDERSTORMS ARE LIKELY THIS
AFTERNOON/EVENING...WHERE SOME HEATING CAN OCCUR THRU THE EXTENSIVE
MID/UPPER LEVEL CLOUDINESS.

..HALES.. 12/15/2006