SWOMCD
SPC MCD 310830
MNZ000-SDZ000-NDZ000-311000-
MESOSCALE DISCUSSION 1971
NWS STORM PREDICTION CENTER NORMAN OK
0330 AM CDT THU JUL 31 2008
AREAS AFFECTED...SOUTHERN ND AND NORTHERN/EASTERN SD INTO FAR
WESTERN MN
CONCERNING...SEVERE THUNDERSTORM WATCH 777...778...
VALID 310830Z - 311000Z
THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH
777...778...CONTINUES.
SEVERE TSTM WATCHES 777/778 CONTINUE UNTIL 10Z/12Z. SEVERE MCS
ADVANCING ACROSS NORTHEAST SD/WW 778 WILL CONTINUE TO PRODUCE BOUTS
OF DAMAGING WINDS AND SEVERE HAIL ACROSS NORTHEAST/EAST CENTRAL SD
OVERNIGHT...LIKELY IMPACTING THE ABERDEEN VICINITY BY AROUND 09Z/4AM
LOCAL TIME. DOWNSTREAM AREAS WILL CONTINUE TO BE MONITORED FOR AN
ADDITIONAL WATCH ACROSS SOUTHEAST SD/SOUTHWEST MN...WHICH COULD BE
NEEDED IN THE NEXT 1-2 HOURS.
30-35 KT SOUTHEAST-ADVANCING QUASI-LINEAR MCS CONTINUES TO ORGANIZE
WITH A GRADUALLY EXPANDING SURFACE COLD POOL...LOCATED ABOUT 35
MILES NORTHWEST OF ABERDEEN AS OF 0815Z. VOLUMETRIC RADAR DATA ALSO
SUGGESTS A BROAD CIRCULATION IS DEVELOPING AMIDST THE LINEAR
MCS...WHICH WOULD SERVE TO ENHANCE MCS SUSTAINABILITY OVERNIGHT. IN
ADDITION...AS THE SURFACE COLD POOL CONTINUES TO EVOLVE OVER THE
NEXT 1-2 HOURS...IT IS PLAUSIBLE THAT SOME ACCELERATION OF THE MCS
MAY OCCUR ACROSS NORTHEAST/EAST CENTRAL SD. AS A SOUTHWESTERLY LOW
LEVEL JET CONTINUES TO INCREASE ACROSS THE REGION /50 KT NOW EVIDENT
NORTH PLATTE WSR-88D VWP/...THE MOST INTENSE PORTION OF THE MCS WILL
TEND TO FAVOR THE NORTHWEST-SOUTHEAST ORIENTED FRONTAL BOUNDARY THAT
EXTENDS ACROSS NORTHEAST/EAST CENTRAL SD INTO SOUTHERN MN.
OTHERWISE...IN THE IMMEDIATE WAKE OF THE MCS /ROUGHLY 50 MILES
BEHIND/...SOME THREAT FOR SEVERE HAIL WILL REMAIN OWING TO WARM
ADVECTION ATOP THE SURFACE COLD POOL.
..GUYER.. 07/31/2008
...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...MPX...FGF...FSD...ABR...BIS...
46760001 46309760 45169576 43639603 43709770 45930155
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-
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