SWOMCD
SPC MCD 190824
ILZ000-MOZ000-IAZ000-190930-
MESOSCALE DISCUSSION 1863
NWS STORM PREDICTION CENTER NORMAN OK
0324 AM CDT SUN SEP 19 2010
AREAS AFFECTED...EXTREME SCNTRL IA...NRN MO AND WCNTRL IL
CONCERNING...SEVERE POTENTIAL...WATCH LIKELY
VALID 190824Z - 190930Z
...LARGE HAIL AND HEAVY RAINFALL TO CONTINUE...
MOSTLY ELEVATED THUNDERSTORMS CONTINUE TO THRIVE IN A BROAD ZONE OF
ENHANCED LOW/MID-LVL THETA-E ADVECTION COINCIDENT WITH THE NOSE OF A
30-40 KT WSW LOW-LEVEL JET. STRONGEST LARGE SCALE ASCENT...TIED TO A
MID-LEVEL WAVE...WILL TRANSLATE TOWARD MID-MS VALLEY THROUGH
MID-MORNING...LIKELY SHIFTING THREATS FOR LARGE HAIL AND HEAVY
RAINFALL ESE WITH TIME. STORMS WILL ALSO CONTINUE TO BACKBUILD WNW
INTO THE VEERING LLJ ACROSS NRN MO...WITH THE WEST EXTENT OF THE
UPDRAFT GENERATION ZONE MARKED BY SLIGHT WARMING IN THE H7-H5 LAYER
NOSING INTO THE KANSAS CITY AREA/WRN MO.
GIVEN THE EWD TRANSLATION OF THE SVR THREAT...A NEW WW IS BEING
CONSIDERED THAT WILL COVER NRN MO AND PARTS OF WCNTRL IL THROUGH
MID-MORNING.
..RACY.. 09/19/2010
...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...ILX...LSX...DVN...DMX...EAX...
LAT...LON 40649435 39959016 38958955 38919049 39479296 39589435
40309476 40649435
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