Monday, November 12, 2007

DAY3SVR: Nws Storm Prediction Center Norman Ok

ACUS03 KWNS 120730
SWODY3
SPC AC 120728

DAY 3 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
0128 AM CST MON NOV 12 2007

VALID 141200Z - 151200Z

..NO SVR TSTM AREAS FORECAST...

..SYNOPSIS...
A PROGRESSIVE AND STRONG JET STREAM MOVING INTO THE NRN PLAINS AND
UPR MS VLY ON TUESDAY WILL AMPLIFY ACROSS THE ERN PORTIONS OF THE
COUNTRY BY WEDNESDAY. UPSTREAM CUT-OFF UPR LOW THAT WILL BE OFF THE
BAJA COAST WILL BEGIN TO MOVE SLOWLY EWD AS ANOTHER STRONG MID-LEVEL
WAVE APPROACHES THE PAC NW COAST BY 12Z THU. IN THE LOWER
LEVELS...A STRONG COLD FRONT ASSOCD WITH THE NRN STREAM SYSTEM WILL
ACCELERATE SEWD...REACHING THE WRN ATLC BASIN...THE SERN STATES AND
GULF COASTAL REGION BY EARLY THU.

..LWR MS VLY/MID-SOUTH...
PRESENCE OF STRONG SFC RIDGE ACROSS THE GULF BASIN THROUGH MID-WEEK
WILL LIMIT RETURN OF MARITIME TROPICAL AIR MASS NWD THROUGH THE
PERIOD. BUT...WRN GULF AIR MASS SHOULD MODIFY SUFFICIENTLY TO
SUPPORT MID-UPR 60S SFC DEW POINTS ACROSS THE LWR MS VLY AND
MID-SOUTH AHEAD OF THE APPROACHING COLD FRONT WEDNESDAY AFTN.
MID-TROPOSPHERIC LAPSE RATES WILL REMAIN RATHER POOR...HOWEVER...AND
MLCAPES SHOULD BE LIMITED TO AOB 1000 J/KG. A FEW TSTMS CAN BE
EXPECTED ALONG/AHEAD OF THE COLD FRONT...BUT COMBINATION OF MODEST
BUOYANCY AND PRIMARY SHEAR RELEGATED N OF THE BOUNDARY...WIDESPREAD
SVR TSTMS DO NOT APPEAR LIKELY.

.RACY.. 11/12/2007

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