SWOMCD
SPC MCD 180942
IAZ000-NEZ000-181045-
MESOSCALE DISCUSSION 1858
NWS STORM PREDICTION CENTER NORMAN OK
0442 AM CDT SAT SEP 18 2010
AREAS AFFECTED...ECNTRL NEB AND WCNTRL/CNTRL IA
CONCERNING...SEVERE THUNDERSTORM WATCH 671...
VALID 180942Z - 181045Z
THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 671
CONTINUES.
...ISOLATED HAIL THREAT TO CONTINUE INTO MID-MORNING...
H925-H85 WINDS HAVE VEERED TO WSW...PRIMARILY FEEDING STRONGER
UPDRAFTS ALONG WRN EDGE OF THE COLLECTIVE COLD POOL ACROSS ERN NEB
WHILE LEADING ACTIVITY HAS DIMINISHED IN INTENSITY. RENEWED
ACTIVITY WILL MOST LIKELY EVOLVE ALONG THE H85 FRONT ALONG/N OF I-80
FROM ECNTRL NEB INTO WCNTRL/CNTRL IA FOR SEVERAL MORE HOURS THIS
MORNING. WHILE IT IS NOT OUT OF THE QUESTION FOR AN ISOLATED STORM
TO BECOME SUFFICIENTLY ROBUST TO PRODUCE SEVERE HAIL...REGION HAS
PRIMARILY SEEN A REDUCTION IN ELEVATED INSTABILITY COMPARED TO
EARLIER IN THE MORNING.
A NEW WW IS NOT ANTICIPATED AFTER 11Z EXPIRATION OF SEVERE
THUNDERSTORM WATCH 671...ALTHOUGH LOCAL WFO/S MAY LOCALLY EXTEND IF
NEEDED.
..RACY.. 09/18/2010
...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...DMX...OAX...GID...
LAT...LON 42069405 41429349 41049449 41149608 41369737 42119755
42069405
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