SWOMCD
SPC MCD 222251
MTZ000-WYZ000-COZ000-UTZ000-IDZ000-230045-
MESOSCALE DISCUSSION 1739
NWS STORM PREDICTION CENTER NORMAN OK
0551 PM CDT SUN AUG 22 2010
AREAS AFFECTED...PARTS OF NRN/ERN UT...WRN/CNTRL WY INTO ERN MT
CONCERNING...SEVERE POTENTIAL...WATCH UNLIKELY
VALID 222251Z - 230045Z
AHEAD OF A VIGOROUS SHORT WAVE TROUGH...STRONGEST MID-LEVEL FORCING
FOR UPWARD VERTICAL MOTION...NOW IMPACTING MUCH OF THE
NORTHERN/EASTERN GREAT BASIN...INCLUDING THE SALT LAKE VALLEY...
APPEARS LIKELY TO CONTINUE LIFTING NORTH NORTHEASTWARD THROUGH THE
NORTHERN ROCKIES AND ADJACENT HIGH PLAINS BETWEEN NOW AND 01-03Z.
AS THIS OCCURS...SCATTERED THUNDERSTORMS NEAR THE SALT LAKE CITY
AREA MAY BEGIN TO DIMINISH...BUT ACTIVITY SHOULD PERSIST...AND
PERHAPS EVEN INCREASE IN COVERAGE...IN A PRE-FRONTAL CORRIDOR ACROSS
SOUTHWEST THROUGH NORTH CENTRAL WYOMING INTO THE LEE OF THE HIGHER
TERRAIN...ACROSS EASTERN MONTANA.
MOISTURE LEVELS ACROSS THIS REGION ARE ONLY SUPPORTING WEAK CAPE
...BUT LAPSE RATES ARE STEEP...AND THE BOUNDARY LAYER IS DEEPLY
MIXED WITH 40-50 DEGREE SURFACE TEMPERATURE-DEW POINT SPREADS.
THESE THERMODYNAMIC PROFILES SHOULD REMAIN FAVORABLE FOR DOWNBURSTS
INTO THE EVENING HOURS. COUPLED WITH THE DOWNWARD TRANSFER OF
MOMENTUM ASSOCIATED WITH 30-40+ SOUTHWESTERLY DEEP LAYER MEAN
FLOW...SOME OF THE SURFACE GUSTS COULD CONTINUE TO BECOME LOCALLY
VERY STRONG AND DAMAGING.
..KERR.. 08/22/2010
...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...UNR...CYS...BYZ...RIW...GJT...SLC...PIH...
LAT...LON 41301251 42821052 45600870 46320729 45740541 42890650
40430919 39831158 40161269 41301251
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-
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