SWOMCD
SPC MCD 291548
LAZ000-ARZ000-TXZ000-OKZ000-291745-
MESOSCALE DISCUSSION 2156
NWS STORM PREDICTION CENTER NORMAN OK
1048 AM CDT THU OCT 29 2009
AREAS AFFECTED...E TX/WRN LA
CONCERNING...SEVERE POTENTIAL...WATCH POSSIBLE
VALID 291548Z - 291745Z
STORMS ARE PROGGED TO SLOWLY INCREASE IN INTENSITY OVER THE NEXT FEW
HOURS ACROSS THIS REGION...WITH WW POSSIBLE BY EARLY AFTERNOON.
LATEST RADAR/VISIBLE IMAGERY AS WELL AS LIGHTNING DATA SHOW A
SLOW/STEADY INCREASE IN THUNDERSTORM COVERAGE AND INTENSITY OVER THE
PAST HOUR OR SO...BOTH INVOF THE COLD FRONT MOVING ACROSS CENTRAL TX
AS WELL AS WITHIN A ZONE OF PRE-FRONTAL WARM ADVECTION EXTENDING AS
FAR E AS WRN LA. WHILE HEATING REMAINS LIMITED BY ABUNDANT CLOUD
COVER...EVEN MODEST HEATING OF THE VERY MOIST /LOW TO MID 70S
DEWPOINTS/ BOUNDARY LAYER WILL RESULT IN ADDITIONAL DESTABILIZATION
OF THE PRE-FRONTAL WARM SECTOR. THIS -- COMBINED WITH WEAK HEIGHT
FALLS AHEAD OF THE APPROACHING UPPER SYSTEM SHOULD RESULT IN A
CONTINUED/STEADY INCREASE IN STORMS THROUGH THE AFTERNOON.
ALONG WITH THE THREAT FOR DAMAGING WINDS...SURFACE SELYS ACROSS TX
INCREASING/VEERING RAPIDLY TO SLY AT 50-PLUS KT AT 1/2 TO 1 KM IS
YIELDING LOW-LEVEL SHEAR SUPPORTIVE OF ROTATION/ISOLATED TORNADOES.
EXPECT SEVERE/TORNADO POTENTIAL TO INCREASE INTO THIS AFTERNOON IN
CONJUNCTION WITH THE STEADY INCREASE IN STORM
ORGANIZATION/INTENSITY.
..GOSS.. 10/29/2009
...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...LCH...SHV...HGX...FWD...OUN...EWX...SJT...
LAT...LON 33779704 33829525 33139390 31519206 30629249 30249411
30009597 30539770 30979856 32399756 33779704
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-
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