Saturday, July 31, 2010

MESO: Mesoscale Discussion 1518

ACUS11 KWNS 312254
SWOMCD
SPC MCD 312253
SDZ000-NDZ000-MTZ000-WYZ000-010100-

MESOSCALE DISCUSSION 1518
NWS STORM PREDICTION CENTER NORMAN OK
0553 PM CDT SAT JUL 31 2010

AREAS AFFECTED...NERN WY/SERN MT/SRN ND/WRN AND N CENTRAL SD

CONCERNING...SEVERE THUNDERSTORM WATCH 555...

VALID 312253Z - 010100Z

THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 555
CONTINUES.

STORMS HAVE INCREASED OVER THE PAST HOUR ACROSS NWRN/N CENTRAL
SD...WITH OUTFLOW NOW PUSHING SSEWD. MEANWHILE...SOME INCREASE IN
CONVECTION IS NOTED FARTHER W...ACROSS NERN WY AND INTO WRN SD.

WITH TIME...EXPECT MAIN CONVECTIVE THREAT TO FOCUS ACROSS THE WRN
HALF OF THE DAKOTAS...AS SLY LOW-LEVEL JET INTENSIFIES THIS EVENING.
IN THE MEAN TIME...STORMS MOVING SEWD TOWARD N CENTRAL/CENTRAL SD
APPEAR LIKELY TO SPREAD JUST E OF THE WATCH OVER THE NEXT 1-2 HOURS.
WHILE EWD PROGRESS SHOULD REMAIN LIMITED -- WHICH ATTM IT APPEARS
SHOULD PRECLUDE THE NEED FOR A NEW WW INTO THE ERN DAKOTAS...SOME
EWD EXPANSION IN AREA OF WW 555 MAY BE WARRANTED TO COVER THE
SEWD-MOVING SEVERE STORMS.

..GOSS.. 07/31/2010

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

ATTN...WFO...ABR...BIS...UNR...BYZ...

LAT...LON 43580299 43600532 44120572 46040394 46630218 46499987
45759934 44400002 44200147 43580299

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