Friday, May 4, 2007

MESO: Mesoscale Discussion 0691

ACUS11 KWNS 050241
SWOMCD
SPC MCD 050241
NEZ000-KSZ000-050415-

MESOSCALE DISCUSSION 0691
NWS STORM PREDICTION CENTER NORMAN OK
0941 PM CDT FRI MAY 04 2007

AREAS AFFECTED...NCNTRL KS AND CNTRL NEB

CONCERNING...TORNADO WATCH 229...

VALID 050241Z - 050415Z

THE SEVERE WEATHER THREAT FOR TORNADO WATCH 229 CONTINUES.

NOCTURNAL INCREASE IN THE SLY LLJ HAS COMMENCED PER AREA PROFILERS
ACROSS THE CNTRL PLAINS WITH 40-45 KTS OBSERVED AT SEVERAL SITES.
RESULTANT INCREASE IN THE LOW-LEVEL WARM ADVECTION REGIME WILL
CONTINUE TO SUPPORT AN UPSWING IN TSTMS. THERE WILL BE SEVERAL FOCI
TO MONITOR. ONE IS ALONG/N OF A WEAK WARM FRONT SITUATED FROM
SCNTRL NEB INTO NERN KS. SUPERCELLS HAVE ALREADY FORMED ALONG THIS
FEATURE AND OTHERS ARE APT TO FORM OVER CNTRL/SCNTRL NEB LATER THIS
EVE. OTHER STORMS WILL EVOLVE FROM LEFT-SPLITS FROM SUPERCELLS
FARTHER SOUTH OVER CNTRL KS. YET ANOTHER GENERATION AREA WILL BE
ALONG THE RETREATING DRYLINE/LEE-TROUGH OVER NWRN KS/NERN CO.

KINEMATIC PROFILES WILL REMAIN QUITE FAVORABLE FOR SUPERCELLS. THE
HBR PROFILER SHOWS MORE THAN 200 M2/S2 0-1KM SRH WITHIN THE CORE OF
THE LLJ. GIVEN THE AMPLY MOIST BOUNDARY LAYER AND SUSTAINED
SUPERCELL STORMS...TORNADOES WILL BE LIKELY.

.RACY.. 05/05/2007

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

ATTN...WFO...GID...LBF...DDC...GLD...

39040055 40120042 40389975 40839968 41790043 42829971
42849857 41469842 41239767 40889809 39419834

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