SPC AC 241719
DAY 2 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
1119 AM CST THU JAN 24 2008
VALID 251200Z - 261200Z
...NO SVR TSTM AREAS FORECAST...
...SYNOPSIS...
UPPER LOW WILL REMAIN QUASI-STATIONARY OFF THE CA COAST WHILE
DOWNSTREAM SHORT WAVE TROUGH INITIALLY OVER THE CNTRL ROCKIES
TRANSLATES EWD INTO THE MIDWEST. IN THE LOW LEVELS...SURFACE LOW
AND ATTENDANT FRONTAL BOUNDARY WILL DEVELOP EWD FROM THE NRN/CNTRL
PLAINS INTO MN/IA IN THE WAKE OF EXPANSIVE ANTICYCLONE SHIFTING EWD
ACROSS THE ERN THIRD OF THE NATION.
...TX/LA COASTS...
SWRN EXTENSION OF LLJ ASSOCIATED WITH ABOVEMENTIONED...MIGRATORY
SHORT WAVE TROUGH WILL RESULT IN AN INCREASE IN MOISTURE AND WARM
THERMAL ADVECTION ABOVE LOW-LEVEL INVERSION THROUGH THE PERIOD.
WHILE MIDLEVEL LAPSE RATES WILL REMAIN WEAK AND GENERALLY LESS THAN
MOIST ADIABATIC...THE WARMING/MOISTENING AROUND 850 MB WILL
CONTRIBUTE TO SOME CONVECTIVE INSTABILITY. AS SUCH...A FEW ELEVATED
TSTMS ARE POSSIBLE FRIDAY NIGHT INTO SATURDAY MORNING.
...NRN/CNTRL CA COAST...
A POCKET OF COLD MIDLEVEL TEMPERATURES /-28 TO -30 C AT 500 MB/ WILL
BE COINCIDENT WITH UPPER LOW WHICH WILL CONTRIBUTE TO STEEP LAPSE
RATES AND WEAK CONVECTIVE INSTABILITY ALONG THE COAST. A RATHER
STRONG VORTICITY MAXIMUM IS FORECAST TO ROTATE AROUND ERN PERIPHERY
OF UPPER SYSTEM WITH ASSOCIATED FRONTAL BOUNDARY MOVING ONSHORE
FRIDAY. A FEW OF THE CONVECTIVE ELEMENTS ASSOCIATED WITH THIS
FRONT...OR DEVELOPING IN POST-FRONTAL ONSHORE FLOW MAY GROW
SUFFICIENTLY DEEP TO SUPPORT ISOLATED LIGHTNING STRIKES.
..MEAD.. 01/24/2008
CLICK TO GET WUUS02 PTSDY2 PRODUCT
NOTE: THE NEXT DAY 2 OUTLOOK IS SCHEDULED BY 0800Z
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