SWODY2
SPC AC 250659
DAY 2 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
1259 AM CST THU FEB 25 2010
VALID 261200Z - 271200Z
...NO SVR TSTM AREAS FORECAST...
...PARTS OF E TX/UPPER TX COAST TO WRN/SRN LA...
A SRN STREAM SHORTWAVE TROUGH EXPECTED TO AMPLIFY INTO THE SRN
PLAINS BY 12Z FRIDAY WILL REMAIN PROGRESSIVE DURING DAY 2...MOVING
SEWD THROUGH E TX/UPPER TX COASTAL AREA BY LATE FRIDAY AFTERNOON AND
REACHING THE LOWER MS VALLEY/NRN GULF OF MEXICO BY 12Z SATURDAY. AN
ATTENDANT WEAK SURFACE LOW LOCATED OVER SRN OK AT 12Z FRIDAY...AND A
TRAILING COLD FRONT EXTENDING SSWWD THROUGH TX WILL SPREAD SEWD
REACHING THE CENTRAL PART OF THE GULF OF MEXICO BY 12Z SATURDAY.
E/NELY SURFACE TRAJECTORIES EMANATING FROM AN AREA OF CP HIGH
PRESSURE OVER THE MID MS VALLEY TO THE CENTRAL GULF COAST STATES
WILL MAINTAIN A STABLE BOUNDARY LAYER INTO THE LOWER MS VALLEY.
MEANWHILE...WEAK MOISTURE RETURN SHOULD OCCUR INTO THE UPPER TX
COAST/SWRN LA FRIDAY AFTERNOON. STEEP MID LEVEL LAPSE RATES AND
FORCING FOR ASCENT WILL SPREAD SEWD ACROSS THE UPPER TX COAST/SWRN
LA ON FRIDAY ATTENDANT TO THE PROGRESSIVE SHORTWAVE TROUGH AIDING IN
SOME DESTABILIZATION FOR CONVECTION/EMBEDDED TSTMS SPREADING ESEWD
FROM E TX TO SRN LA. WEAK INSTABILITY OVER INLAND AREAS WILL
PRECLUDE A SEVERE WEATHER THREAT.
...CA COAST AND THE INTERIOR VALLEY...
A DEEPENING PACIFIC LONGWAVE TROUGH WILL MOVE INLAND ALONG THE WEST
COAST BRINGING WITH IT THE POTENTIAL FOR TSTMS FROM N-S DURING
MAINLY THE LATTER HALF OF THE DAY 2 PERIOD. COLD MID LEVEL
TEMPERATURES /-22 TO -27 C AT 500 MB/ AND STEEPENING LAPSE RATES
SHOULD SUPPORT MUCAPE 200-400 J/KG. A FEW OF THE STRONGER STORMS
COULD PRODUCE SMALL HAIL.
..PETERS.. 02/25/2010
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-
To unsubscribe from WX-STORM send e-mail to LISTSERV@LISTSERV.ILLINOIS.EDU with
"unsub wx-storm" in the body of your message. For more information write cnovy@cox.net.
No comments:
Post a Comment