SWOMCD
SPC MCD 181541
ILZ000-WIZ000-IAZ000-MOZ000-181745-
MESOSCALE DISCUSSION 1005
NWS STORM PREDICTION CENTER NORMAN OK
1041 AM CDT FRI JUN 18 2010
AREAS AFFECTED...EXTREME NRN MO...ERN IA...NRN IL INTO SRN WI
CONCERNING...OUTLOOK UPGRADE
VALID 181541Z - 181745Z
THE MODERATE RISK ISSUED AT 13Z WILL BE ADJUSTED EAST AND NORTH TO
INCLUDE ALL OF NRN IL AND SRN WI IN ADDITION TO ERN IA AN EXTREME
NRN MO. DAMAGING WIND AND LARGE HAIL WILL BE THE MAIN
THREATS...THOUGH ISOLATED TORNADOES WILL ALSO BE POSSIBLE.
STORMS ARE EXPECTED TO CONTINUE DEVELOPING IN ASSOCIATION WITH
ONGOING MCS AS IT ADVANCES EWD THROUGH ERN IA...NRN IL AND SRN WI.
DEEP LAYER SHEAR WILL STRENGTHEN TO 40+ KT IN VICINITY OF MCS AS
MID-LEVEL JET ROTATES THROUGH BASE OF PROGRESSIVE UPPER TROUGH
CURRENTLY MOVING THROUGH THE UPPER MS VALLEY. THE ATMOSPHERE WILL
DESTABILIZE INTO WI THIS AFTERNOON AS SWLY LOW LEVEL JET ADVECTS
HIGHER THETA-E AIR NEWD WITH TIME. EMBEDDED ORGANIZED STORMS
INCLUDING BOW ECHOES AND SUPERCELLS WILL BE POSSIBLE AS ACTIVITY
DEVELOPS EWD INTO THE DESTABILIZING BOUNDARY LAYER.
..DIAL.. 06/18/2010
...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...LOT...ILX...MKX...LSX...DVN...ARX...DMX...EAX...
LAT...LON 40689391 41659191 43299123 43989020 43748815 42188781
40498909 39519411 40179475 40689391
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