ACUS11 KWNS 170842
SWOMCD
MESOSCALE DISCUSSION 1033
NWS STORM PREDICTION CENTER NORMAN OK
0341 AM CDT TUE JUN 17 2014
AREAS AFFECTED...N IL...FAR E IA/S WI
CONCERNING...SEVERE THUNDERSTORM WATCH 309...
VALID 170841Z - 170945Z
THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 309
CONTINUES.
SUMMARY...WITH AROUND 50-KT WIND GUSTS PERSISTING WITHIN THE REMNANT
QLCS OVER E IA...AND DOWNSTREAM AIR MASS RECOVERING IN THE WAKE OF
AN MCS NOW OVER LK MI...ADDITIONAL WW ISSUANCE IS POSSIBLE BY 10Z.
DISCUSSION...QLCS FROM DUBUQUE TO HENRY COUNTY IA HAS MAINTAINED
STRONG TO SEVERE WIND GUSTS /REF 51 KT KAWG AT 0815Z AND 47 KT KIOW
AT 0807Z/. ALTHOUGH OVERALL LIGHTNING TRENDS HAVE BEEN WEAKENING AND
TRAILING STRATIFORM RAIN AREA IN ITS WAKE HAS BEEN DECREASING...AIR
MASS IMMEDIATELY AHEAD OF THE LINE IS AT LEAST WEAKLY UNSTABLE WITH
SURFACE TEMPERATURES GENERALLY IN THE UPPER 60S AND 70S. DVN VWP
DATA INDICATES A LARGE HODOGRAPH WITH 0-1 KM SHEAR AROUND 45 KT.
THIS COULD FOSTER BRIEF QLCS TORNADOES AND MAINTAIN SUFFICIENT GUST
INTENSITY TO WARRANT AN ADDITIONAL WW BEYOND WW 309 GIVEN FAVORABLE
ALIGNMENT OF THE QLCS RELATIVE TO DEEP-LAYER FLOW.
..GRAMS/CORFIDI.. 06/17/2014
...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...LOT...ILX...MKX...DVN...
LAT...LON 42249061 42589017 42828908 42728797 42388767 41898740
41548735 41078803 40928992 40989067 41159105 41229113
42249061
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