SWODY3
SPC AC 120723
DAY 3 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
0223 AM CDT MON APR 12 2010
VALID 141200Z - 151200Z
...SYNOPSIS...
DOMINANT UPPER HIGH CENTERED OVER THE TN VALLEY/SERN U.S. WILL BUDGE
LITTLE DURING THE PERIOD. AS A RESULT...STRONG TROUGH WILL BE
FORCED TO EJECT NEWD ACROSS THE NRN PLAINS INTO SCNTRL CANADA BEFORE
TURNING SEWD IN LATER PERIODS. LARGE SCALE SUBSIDENCE BENEATH THE
UPPER RIDGE AND DEEP NELY FLOW ACROSS MUCH OF THE GOM WILL LIMIT
MOISTURE RETURN AROUND THE WRN PERIPHERY INTO TX...AND ULTIMATELY
RESTRICT HIGHER MOISTURE CONTENT FROM SPREADING INLAND.
DESPITE THE ADVERSE LARGE SCALE PATTERN FOR MARITIME TROPICAL
AIRMASS TO RETURN TO THE CONUS...A NARROW BAND OF MODIFIED BOUNDARY
LAYER MOISTURE WILL SPREAD NWD ACROSS THE PLAINS INTO THE UPPER MS
VALLEY AHEAD OF WIND SHIFT WHERE 50S SFC DEW POINTS SHOULD BE NOTED.
EVEN SO FORECAST SOUNDINGS SUGGEST INSTABILITY WILL REMAIN
MEAGER...BUT SUFFICIENT FOR WEAK CONVECTION FROM PORTIONS OF
MN/WI...SWWD INTO NM/WEST TX. POCKETS OF STRONG DIURNAL HEATING
NEAR THE FRONT MAY BRIEFLY CONTRIBUTE TO ROBUST UPDRAFTS BUT OVERALL
PATTERN DOES NOT LOOK FAVORABLE FOR ORGANIZED SEVERE THUNDERSTORMS.
..DARROW.. 04/12/2010
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