SWOMCD
SPC MCD 010226
ARZ000-LAZ000-TXZ000-OKZ000-010330-
MESOSCALE DISCUSSION 0674
NWS STORM PREDICTION CENTER NORMAN OK
0926 PM CDT SAT APR 30 2011
AREAS AFFECTED...NERN TX...EXTREME SERN OK AND SWRN AR
CONCERNING...TORNADO WATCH 257...
VALID 010226Z - 010330Z
THE SEVERE WEATHER THREAT FOR TORNADO WATCH 257 CONTINUES.
GREATEST SEVERE WEATHER POTENTIAL...INCLUDING A CONTINUED TORNADO
THREAT...EXISTS OVER THE ERN HALF OF WW 257. THE DIMINISHING SEVERE
WEATHER THREAT OVER THE NWRN HALF SHOULD CONTINUE AS A COLD FRONT
ADVANCES SSEWD. AND...IF THIS TREND PERSISTS IN THE SHORT
TERM...THEN THE NWRN HALF OF THIS WATCH COULD BE CANCELLED EARLY.
THE STRONGEST STORM WITHIN WW 257 WAS LOCATED OVER EXTREME NERN TX
/SRN MORRIS AND WRN CASS COUNTIES/ AND TRACKING ENEWD AT 25 KT. AIR
MASS ACROSS ERN TX TO THE ARKLATEX IS MOIST AND MODERATELY UNSTABLE.
THIS COMBINED WITH STRONG LOW LEVEL SHEAR PER 40-50 KT SSWLY LLJ
EXTENDING ACROSS THIS WATCH WITH BACKED SURFACE WINDS WILL CONTINUE
TO SUPPORT A TORNADO THREAT THIS EVENING AS ACTIVITY TRACKS TOWARD
SWRN AR.
MID EVENING SURFACE ANALYSES SHOWED A COLD FRONT MAKING A LITTLE
MORE PROGRESS SSEWD TO S AND E OF DALLAS. THE INITIAL STORMS THAT
FORMED OVER DALLAS AND COLLIN COUNTIES HAD WEAKENED...POSSIBLY BEING
UNDERCUT BY THE COLD FRONT AND/OR DUE TO INCREASING SURFACE BASED
INHIBITION GIVEN THE ONSET OF COOLING WITH THE LOSS OF DAYTIME
HEATING. THESE TRENDS ACROSS THE NWRN PORTION OF WW 257 SUGGEST
THESE COUNTIES MAY BE CANCELLED EARLY.
..PETERS.. 05/01/2011
...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...LZK...SHV...FWD...
LAT...LON 32309636 33079537 33739478 34359422 34179382 33909342
33399357 32989393 32389412 32289438 32059524 32009605
32309636
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-
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