AREAS AFFECTED...EXTREME ERN IA...NRN IL...NRN IND...NWRN OH
CONCERNING...OUTLOOK UPGRADE
VALID 121526Z - 121630Z
SUMMARY...THE 1630Z CONVECTIVE OUTLOOK WILL INCLUDE A CATEGORICAL
UPGRADE TO HIGH RISK FOR DAMAGING WIND POTENTIAL FROM EXTREME
EASTERN IOWA INTO NORTHERN PORTIONS OF ILLINOIS AND INDIANA...AND
NORTHWEST PORTIONS OF OHIO. IN ADDITION...TORNADO PROBABILITIES WILL
BE INCREASED TO 15 PERCENT OVER PORTIONS OF EXTREME EASTERN IOWA
INTO NORTHWEST ILLINOIS.
DISCUSSION...SVR TSTMS ARE EXPECTED TO DEVELOP THIS AFTERNOON IN THE
VICINITY OF EASTERN IOWA/NORTHWEST ILLINOIS AND QUICKLY BECOME
SEVERE SUPERCELLS WITH A RISK FOR TORNADOES...POSSIBLY
SIGNIFICANT...WITH UPSCALE GROWTH INTO A FAST-MOVING AND
FORWARD-PROPAGATING MESOSCALE CONVECTIVE SYSTEM. WIDESPREAD DAMAGING
WINDS ARE LIKELY ACROSS THE HIGH RISK AREA...WITH SOME SIGNIFICANT
SEVERE GUSTS POSSIBLE.
DETAILS WILL BE FORTHCOMING IN THE 1630Z CONVECTIVE OUTLOOK.
..BUNTING/CARBIN.. 06/12/2013
...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...ILN...IWX...IND...LOT...ILX...DVN...
LAT...LON 40428861 40538938 40979080 41469099 41919096 42269070
42459028 42358912 42388860 42298808 41728689 41638595
41678518 41698471 41658438 41248404 40608437 40348508
40288608 40328738 40428861
