Geos Posted May 20, 2012 Share Posted May 20, 2012 Thunderstorm over McHenry county gathering strength! Winds almost hurricane force possible. Really starting to get dark here already. SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL 423 PM CDT SUN MAY 20 2012 ILC097-111-202200- /O.CON.KLOT.SV.W.0030.000000T0000Z-120520T2200Z/ MCHENRY IL-LAKE IL- 423 PM CDT SUN MAY 20 2012 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR NORTHWESTERN LAKE AND MCHENRY COUNTIES UNTIL 500 PM CDT... AT 417 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND DESTRUCTIVE WINDS IN EXCESS OF 70 MPH. THESE STORMS WERE LOCATED ALONG A LINE EXTENDING FROM HEBRON TO BULL VALLEY...MOVING NORTHEAST AT 45 MPH. IN ADDITION...AT 400 PM....70 MPH WINDS WERE REPORTED BY A TRAINED WEATHER SPOTTER IN MARENGO WITH THESE STORMS. FURTHERMORE...QUARTER SIZED HAIL HAS BEEN REPORTED IN WOODSTOCK. SEVERE THUNDERSTORMS WILL BE NEAR... SUNNYSIDE...SPRING GROVE...RICHMOND AND PISTAKEE HIGHLANDS AROUND 430 PM CDT. FOX LAKE AROUND 435 PM CDT. LAKE CATHERINE...CHANNEL LAKE AND ANTIOCH AROUND 440 PM CDT. THE FOLLOWING LOCATIONS MAY ALSO BE IMPACTED... CHAIN O LAKES STATE PARK AND MCHENRY COUNTY FAIRGROUNDS. Link to comment Share on other sites More sharing options...
kevlon62 Posted May 20, 2012 Share Posted May 20, 2012 Really dodged a bullet here as far as the hail and straight line wind reports go. We had about a minute of 40+ sustained gusts accompanied by an intense downpour. The main portion stayed moving NE enough to just clip. I threw my bike to the side and helped a couple from Michigan tear down and load their trailer. Most are still set up/half dismantled with goods and waiting for vehicles. That was memorable. Link to comment Share on other sites More sharing options...
BeastFromTheEast Posted May 20, 2012 Share Posted May 20, 2012 nice little outflow boundary coming off that line already. some popcorn cells over the lake, might go snap some pics. That OFB is legit!! Getting a real nice gust of wind right now.. Link to comment Share on other sites More sharing options...
wisconsinwx Posted May 20, 2012 Share Posted May 20, 2012 Looks like that cell straddling the border will hit Kenosha and Racine Counties pretty well, miss us just to the south. Almost completely overcast now, but little in the way of really dark sky. Link to comment Share on other sites More sharing options...
Geos Posted May 20, 2012 Share Posted May 20, 2012 Some storms reports: 0400 PM TSTM WND GST MARENGO 42.25N 88.60W 05/20/2012 M75 MPH MCHENRY IL TRAINED SPOTTER ALSO ENCOUNTERED PENNY SIZE HAIL 0415 PM HAIL 5 NW WOODSTOCK 42.36N 88.51W 05/20/2012 M1.00 INCH MCHENRY IL PUBLIC ALDEN RD. RELAYED BY WREX. 0423 PM HAIL W WOODSTOCK 42.31N 88.44W 05/20/2012 M1.00 INCH MCHENRY IL PUBLIC US 14 AND KISHWAUKEE RD. RELAYED BY WREX 0439 PM HAIL RICHMOND 42.48N 88.31W 05/20/2012 M0.25 INCH MCHENRY IL TRAINED SPOTTER Edit: Winds are ripping out of the west right now. 45mph or greater! Link to comment Share on other sites More sharing options...
Geos Posted May 20, 2012 Share Posted May 20, 2012 New Warning for the far western burbs of Chicago. SEVERE THUNDERSTORM WARNING ILC037-089-093-099-202300- /O.NEW.KLOT.SV.W.0031.120520T2203Z-120520T2300Z/ BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL 503 PM CDT SUN MAY 20 2012 THE NATIONAL WEATHER SERVICE IN CHICAGO HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... SOUTHERN DE KALB COUNTY IN NORTH CENTRAL ILLINOIS... SOUTHERN KANE COUNTY IN NORTHEAST ILLINOIS... NORTHERN KENDALL COUNTY IN NORTHEAST ILLINOIS... NORTHEASTERN LA SALLE COUNTY IN NORTH CENTRAL ILLINOIS... * UNTIL 600 PM CDT * AT 500 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED NEAR LELAND...OR 8 MILES SOUTH OF SHABBONA...AND MOVING NORTHEAST AT 35 MPH. * THE SEVERE THUNDERSTORM WILL BE NEAR... SOMONAUK AND WATERMAN AROUND 510 PM CDT. HINCKLEY AND SANDWICH AROUND 520 PM CDT. LITTLE ROCK AND PLANO AROUND 525 PM CDT. SUGAR GROVE AROUND 535 PM CDT. ELBURN AROUND 540 PM CDT. MONTGOMERY AROUND 545 PM CDT. NORTH AURORA AND AURORA AROUND 550 PM CDT. BATAVIA...GENEVA AND ST. CHARLES AROUND 555 PM CDT. THE FOLLOWING LOCATIONS MAY ALSO BE IMPACTED... AURORA UNIVERSITY...FERMILAB...ILLINOIS MATH AND SCIENCE ACADEMY... KANE COUNTY COUGARS BALLPARK...SANDWICH FAIRGROUNDS AND WAUBONSEE COMMUNITY COLLEGE. Link to comment Share on other sites More sharing options...
SchaumburgStormer Posted May 20, 2012 Share Posted May 20, 2012 Had one storm miss me 5 miles to the north, second warning missed me 5 miles to the south... Link to comment Share on other sites More sharing options...
Geos Posted May 20, 2012 Share Posted May 20, 2012 Looks like new storms trying to fire up right along the cold front west of here. Just had another t-shower. Really hoping for a good downpour this evening. On a side note, these storms will probably help to disperse the protests in Chicago. Link to comment Share on other sites More sharing options...
Hoosier Posted May 21, 2012 Share Posted May 21, 2012 Sounds like some pretty strong winds in Gary http://www.nwitimes.com/news/local/lake/gary/cause-not-yet-determined-in-calumet-township-mall-collapse/article_dfcde95b-8d85-55cc-b65a-c89ff9400bac.html The microburst/tornado line is a little interesting. Based on this and other reports it's probably gotta be one or the other...probably the first one given the environment yesterday. Link to comment Share on other sites More sharing options...
Chicago Storm Posted May 22, 2012 Author Share Posted May 22, 2012 Sounds like some pretty strong winds in Gary http://www.nwitimes....9ff9400bac.html The microburst/tornado line is a little interesting. Based on this and other reports it's probably gotta be one or the other...probably the first one given the environment yesterday. Microburst it is... PUBLIC INFORMATION STATEMENT...CORRECTED NATIONAL WEATHER SERVICE CHICAGO IL 644 PM CDT MON MAY 21 2012 /744 PM EDT MON MAY 21 2012/ ...MICROBURST WIND DAMAGE CONFIRMED NEAR GARY INDIANA ON SUNDAY EVENING... THE NATIONAL WEATHER SERVICE CONDUCTED A STORM SURVEY IN NORTH CENTRAL LAKE COUNTY INDIANA OF DAMAGE THAT WAS EXPERIENCED FROM A SEVERE THUNDERSTORM ON SUNDAY EVENING MAY 20TH. EVENT...MICROBURST. MAXIMUM WINDS...85 TO 90 MPH. TOTAL DAMAGE PATH LENGTH...1.25 MILES. HOWEVER...MAXIMUM ESTIMATED WINDS WERE CONFINED TO A PATH LENGTH OF 0.6 MILES...ENDING JUST NORTHEAST OF THE STRIP MALL DAMAGE. LOCATION...4 MILES SOUTH SOUTHWEST OF GARY INDIANA. THE MOST SIGNIFICANT DAMAGE WAS CONFINED BETWEEN 41ST AVENUE AND 45TH AVENUE NEAR CLEVELAND STREET (ROUTE 55). MAXIMUM WIDTH...ESTIMATED TO BE AROUND 1/3 OF MILE. TIME...ESTIMATED BASED OFF RADAR AND SECURITY CAMERA TIME STAMP TO BE BETWEEN 7:18 TO 7:21 PM ON SUNDAY MAY 20TH. DAMAGE SUMMARY...SEVERE DAMAGE OCCURRED TO A PORTION OF A STRIP MALL LOCATED ON CLEVELAND STREET NEAR 41ST AVENUE. THE BUILDING BECAME COMPROMISED AS THE FRONT WINDOWS WERE SHATTERED FROM THE STRONG STRAIGHT LINE WINDS. THIS RESULTED IN THE COLLAPSE OF A CINDER BLOCK WALL ALONG THE BUILDINGS SOUTH SIDE. ONE TENT IN THE FRONT PARKING LOT WAS BLOWN ONTO NEARBY POWER LINES AND A TRAILER WAS MOVED SEVERAL FEET. THE EVENT WAS CAUGHT ON SECURITY CAMERAS...WHICH HELPED CONFIRM THAT STRONG STRAIGHT LINE WINDS WERE RESPONSIBLE FOR THE DAMAGE. NO OTHER STRUCTURAL DAMAGE WAS FOUND AROUND THE AREA...WITH THE EXCEPTION OF DAMAGE DUE TO TREES AND LIMBS FALLING ON HOMES AND CARS. THERE WAS SOME SIGNIFICANT TREE DAMAGE ON THE WEST AND SOUTHWEST SIDE OF CLEVELAND STREET. SEVERAL SOFTWOOD TREES WERE FOUND TO BE UPROOTED AND A FEW SMALLER TRUNKED HARDWOODS WERE SNAPPED OFF AT THE TRUNK. THERE WERE ALSO NUMEROUS TREE LIMBS OF VARIOUS SIZES RIPPED OFF OF TREES. IN ADDITION TO THE SECURITY CAMERA FOOTAGE SUPPORTING A STRAIGHT LINE WIND EVENT...ALL OF THE UPROOTED OR SNAPPED TREES WERE FOUND TO BE FACING TOWARDS THE NORTHEAST...IN THE DIRECTION OF STORM MOTION. THERE WAS NO CONVERGENT...OR ROTATIONAL DAMAGE NOTED. THE ABOVE DAMAGE WAS CONSISTENT WITH A MAXIMUM EQUIVALENT WIND SPEED OF A LOW END EF-1 ON THE ENHANCED FUJITA SCALE...WITH THE MORE SIGNIFICANT TREE DAMAGE AND WINDOW DAMAGE CAUSING THE WALL COLLAPSE USED TO SUPPORT THE 85 TO 90 MPH ESTIMATE. OUTSIDE OF THE MOST SIGNIFICANT DAMAGE...WIND SPEEDS WERE ROUGHLY OF LOW END EF-0 INTENSITY...OR 65 TO 70 MPH. Link to comment Share on other sites More sharing options...
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