MD 1945 CONCERNING SEVERE THUNDERSTORM WATCH 536… FOR NERN IL THROUGH EXTREME SRN WI
MESOSCALE DISCUSSION 1945
NWS STORM PREDICTION CENTER NORMAN OK
0822 PM CST WED NOV 11 2015
AREAS AFFECTED...NERN IL THROUGH EXTREME SRN WI
CONCERNING...SEVERE THUNDERSTORM WATCH 536...
VALID 120222Z - 120315Z
THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 536
CONTINUES.
SUMMARY...THREAT FOR DAMAGING WIND WILL PERSIST OVER NERN IL THROUGH
0330Z. BASED ON CURRENT MOVEMENT...SQUALL LINE WILL APPROACH THE
CHICAGO AREA NEAR 03Z.
DISCUSSION...A DECREASING TREND IN LIGHTNING AND STORM TOP HEIGHTS
HAS BEEN OBSERVED DURING THE PAST HOUR. HOWEVER...THE SQUALL LINE
EXTENDING FROM NERN THROUGH CNTRL IL REMAINS ORGANIZED WITH A FEW
BOWING SEGMENTS STILL OBSERVED. THE LINE IS MOVING EAST AT 40 KT AND
WILL APPROACH THE CHICAGO METRO AREA BY 03Z. A 61 KT WIND GUST WAS
RECENTLY REPORTED AT THE PEORIA ASOS...AND LATEST CHICAGO VWP
INDICATES A 75 KT SLY LLJ. DESPITE A LIKELY SLOW BUT GRADUAL
WEAKENING OF SQUALL LINE DURING THE NEXT COUPLE OF HOURS...THREAT
FOR ISOLATED STRONG TO DAMAGING WIND GUSTS WILL REMAIN POSSIBLE AS
HIGHER MOMENTUM AIR IS TRANSFERRED DOWN TO THE SFC LAYER WITHIN THE
CONVECTIVE BAND.
..DIAL.. 11/12/2015
...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...LOT...ILX...MKX...
LAT...LON 41558877 42498882 43108902 43078833 42158786 41378776
40668801 40588889 41558877
from SPC Mesoscale Discussions http://1.usa.gov/1PpjQAh
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