SWODY3
SPC AC 120730
DAY 3 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
0130 AM CST THU NOV 12 2009
VALID 141200Z - 151200Z
...SYNOPSIS...
A SERIES OF IMPULSES WILL MOVE THROUGH BROADER SCALE UPPER TROUGH
OVER THE CNTRL AND WRN STATES. SHORTWAVE THROUGH THAT WILL MOVE
THROUGH THE PACIFIC NW AND NRN ROCKIES FRIDAY IS FORECAST TO AMPLIFY
SEWD INTO THE GREAT BASIN SATURDAY...WHILE SRN BRANCH SHORTWAVE
TROUGH EJECTS INTO THE SRN ROCKIES AND SRN PLAINS. BAROCLINIC ZONE
THAT WILL EXTEND FROM THE GREAT LAKES SWWD INTO THE CNTRL ROCKIES
EARLY SATURDAY WILL CONTINUE SLOWLY SEWD DURING THE DAY.
...CNTRL ROCKIES THROUGH CNTRL PLAINS...UPPER MS VALLEY AND GREAT
LAKES...
LIMITED MOISTURE WILL RETURN NWD THROUGH PRE-FRONTAL WARM SECTOR
OVER THE SRN PLAINS AND LOWER-MID MS VALLEY. AS A
RESULT...INSTABILITY WILL REMAIN VERY LIMITED. AREAS OF CONVECTION
WILL REMAIN POSSIBLE...PRIMARILY IN POST FRONTAL ZONE FROM THE CNTRL
ROCKIES THROUGH THE CNTRL PLAINS AND UPPER MS VALLEY WHERE DEEPER
FORCING ASSOCIATED WITH IMPULSES EJECTING NEWD ON COOL SIDE OF FRONT
WILL EXIST. WEAK INSTABILITY SUGGESTS ANY THUNDERSTORM ACTIVITY WILL
REMAIN ISOLATED.
..DIAL.. 11/12/2009
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