[MCD] SWOMCD

Sat Apr 29 03:03:59 UTC 2006

ACUS11 KWNS 290303
SWOMCD
SPC MCD 290303 
TXZ000-290430-

MESOSCALE DISCUSSION 0687
NWS STORM PREDICTION CENTER NORMAN OK
1003 PM CDT FRI APR 28 2006

AREAS AFFECTED...EAST TX

CONCERNING...TORNADO WATCH 258...259...

VALID 290303Z - 290430Z

...SEVERE THREAT WILL INCREASE EAST OF WATCHES 258/259 ACROSS EAST
TX BY THE EARLY MORNING HOURS. TORNADO WATCH WILL BE ISSUED BY
MIDNIGHT...

COLD FRONT CONTINUES TO SURGE SWD ACROSS THE TX HIGH PLAINS WHILE
WARM ADVECTION APPEARS TO BE THE PRIMARY AGENT IN SEVERE
THUNDERSTORM CLUSTERS FROM NEAR THE RED RIVER...SWD INTO THE HILL
COUNTRY.  AS LARGE SCALE FORCING SPREADS ACROSS CNTRL TX CONVECTION
SHOULD BEGIN TO DEVELOP NEAR THE ERN EDGE OF TORNADO
WATCHES...BENEATH STRONG LLJ.  LATEST THINKING IS SEVERE
THUNDERSTORM CLUSTERS OVER THE HILL COUNTRY...AND OVER THE DFW
METROPLEX WILL BE APPROACHING THE ERN EDGE OF TORNADO WATCHES BY
MIDNIGHT.  GIVEN THE STRONG LOW LEVEL SHEAR...40KT
SFC-1KM/HELICITY...500-700M2/S2...NEW TORNADO WATCH WILL BE ISSUED
DOWNSTREAM TO ACCOUNT FOR THIS EVOLUTION.

..DARROW.. 04/29/2006

...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...

ATTN...WFO...SHV...HGX...FWD...EWX...

30039740 33589625 33109433 30049552 

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