SWOMCD
SPC MCD 260946
ALZ000-FLZ000-MSZ000-LAZ000-261115-
MESOSCALE DISCUSSION 0592
NWS STORM PREDICTION CENTER NORMAN OK
0446 AM CDT THU APR 26 2007
AREAS AFFECTED...FAR SERN PARTS OF LA/MS INTO SWRN AL
CONCERNING...TORNADO WATCH 190...
VALID 260946Z - 261115Z
THE SEVERE WEATHER THREAT FOR TORNADO WATCH 190 CONTINUES.
POTENTIAL FOR LOCALLY STRONG WIND GUSTS AND ISOLATED TORNADOES IS
EXPECTED TO CONTINUE ACROSS ERN PORTIONS OF WW AREA THROUGH 11-12Z.
AS OF 0935Z...REGIONAL RADAR IMAGERY INDICATED A SLOW MOVING LINEAR
CONVECTIVE SYSTEM EXTENDING FROM E OF TCL TO JUST W OF GPT TO SW OF
HUM. WHILE THE OVERALL PROGRESSION OF THE LINE IS SLOWLY TO THE
E...EMBEDDED CONVECTIVE ELEMENTS EXHIBITING CYCLONIC ROTATION HAVE
BEEN OBSERVED MOVING NEWD AT A MORE RAPID SPEED. AIR MASS AHEAD OF
THESE STORMS REMAINS RELATIVELY WARM AND MOIST EARLY THIS
MORNING...THOUGH WEAK LAPSE RATES ARE LIMITING MLCAPES TO 200-400
J/KG.
MOB VWP INDICATES THAT LOW-LEVEL SHEAR HAS DECREASED SLIGHTLY OVER
THE PAST COUPLE OF HOURS OWING TO WEAK VEERING OF LOW-LEVEL WIND
FIELDS. HOWEVER...THE MOIST BOUNDARY LAYER COUPLED WITH 0-1 KM SRH
OF AROUND 150 M2/S2 STILL SUGGESTS SOME POTENTIAL FOR AN ISOLATED
TORNADO...EITHER SUPERCELLULAR OR VIA NON-DESCENDING PROCESS.
LOCALLY STRONG WIND GUSTS WILL ALSO BE POSSIBLE WITH ANY EMBEDDED
LEWP/BOWING STRUCTURES.
.MEAD.. 04/26/2007
..PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...BMX...MOB...JAN...LIX...LCH...
32448849 32398780 32108775 31958744 29838703 29638838
28458885 28418975 28559139 30329123 30549068 31209048
31228938
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