SWODY1
SPC AC 180448
DAY 1 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
1148 PM CDT WED MAR 17 2010
VALID 181200Z - 191200Z
...NO SVR TSTM AREAS FORECAST...
...SYNOPSIS...
RELATIVELY DRY AIR WILL REMAIN AT THE SURFACE ACROSS THE ENTIRE
CONUS TODAY...WITH LITTLE INSTABILITY FOR THUNDERSTORMS. A BROAD
AREA OF WEAK LOW PRESSURE WILL DEVELOP LATER TODAY FROM THE CO RIVER
VALLEY NEWD ACROSS THE FOUR CORNERS REGION AHEAD OF A COLD FRONT.
SOME COOLING ALOFT WILL OCCUR BENEATH A POSITIVELY TILTED UPPER
TROUGH...AND THIS WILL COMBINE WITH DAYTIME HEATING TO CREATE A
WEAKLY UNSTABLE ATMOSPHERE FROM SRN NV EWD INTO WRN CO THIS
AFTERNOON. FARTHER E...A DEEPENING COLD FRONT AND MID LEVEL FORCING
MAY RESULT IN ISOLATED THUNDERSTORMS OVER SRN NEB.
...GREAT BASIN/CNTRL ROCKIES...
WEAK INSTABILITY WILL MATERIALIZE BY LATE AFTERNOON ACROSS THE WRN
GREAT BASIN AND INTO WY/CO ALONG A COLD FRONT. ALTHOUGH HEATING WILL
RESULT IN STEEP LOW LEVEL LAPSE RATES WITH EVAPORATIVE COOLING
POTENTIAL...LOW TO MID LEVEL WIND FIELDS WILL REMAIN RATHER
WEAK...AVERAGING LESS THAN 20 KT. THUS...SEVERE WIND GUSTS ARE NOT
ANTICIPATED.
...SW NEB/NW KS...
ELEVATED INSTABILITY ROOTED AROUND 700 MB IS FORECAST TO DEVELOP BY
LATE EVENING AND INTO THE OVERNIGHT HOURS ABOVE A DEEPENING COLD
FRONT. ALOFT...HEIGHT FALLS/COOLING WILL CONTINUE AS THE TROUGH DIGS
SEWD. FORECAST SOUNDINGS FROM THE NAM AS WELL AS THE GFS SUGGEST AT
LEAST 100 J/KG MUCAPE WILL BE PRESENT ALONG WITH UPWARD MID LEVEL
VERTICAL MOTION. THUS...AN ELEVATED BAND OF THUNDERSTORMS CANNOT BE
RULED OUT.
..JEWELL.. 03/18/2010
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-
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