SWODY2
SPC AC 150513
DAY 2 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
1213 AM CDT SUN MAR 15 2009
VALID 161200Z - 171200Z
...NO SVR TSTM AREAS FORECAST...
...SYNOPSIS...
SRN STREAM MID-LEVEL TROUGH WILL CONTINUE CROSSING THE CENTRAL AND
ERN U.S. THIS PERIOD...WHILE BROAD CYCLONIC FLOW FIELD REMAINS
ACROSS THE NORTHWEST U.S. S OF A LARGE TROUGH IN THE NRN STREAM --
OVER NERN PACIFIC/WRN CANADA/AK.
AT THE SURFACE...A WEAK FRONT WILL CONTINUE MOVING SEWD ACROSS THE
SOUTHEAST...WHILE A MUCH STRONGER FRONT -- ALIGNED ENE-WSW ACROSS MT
AND THE PAC NW -- CONTINUES MAKING VERY SLOW SEWD PROGRESS.
...SERN STATES...
WEAK CONVECTION WILL CONTINUE ACROSS PARTS OF THE SOUTHEAST THIS
PERIOD...INVOF A WEAK COLD FRONT MOVING SLOWLY SEWD ACROSS THE
REGION. THOUGH INSTABILITY WILL REMAIN MEAGER...A FEW EMBEDDED
LIGHTNING STRIKES MAY OCCUR -- PARTICULARLY DURING THE AFTERNOON AND
EVENING.
...PAC NW COAST...
WIDESPREAD SHOWERS ARE FORECAST ACROSS THE NORTHWEST QUARTER OF THE
U.S. THIS PERIOD...AS STRONG ONSHORE FLOW ALOFT PERSISTS. WHILE A
GENERAL LACK OF INSTABILITY WILL PRECLUDE APPRECIABLE THUNDER
POTENTIAL IN MOST AREAS...WILL INTRODUCE A 10% THUNDER LINE ACROSS
COASTAL PORTIONS OF WA WHERE THE GREATEST LIKELIHOOD OF A FEW
LIGHTNING STRIKES APPEARS TO EXIST.
..GOSS.. 03/15/2009
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