Alert archive / Indiana / Severe Thunderstorm Warnings in 2011
Severe Thunderstorm Warning 124, NWS Chicago, IL
NWS Chicago, IL issued this severe thunderstorm warning at Jul 11, 2011, 8:22 AM CDT for Cook County, Will County, Illinois; Jasper County, Lake County, Porter County, Indiana. It was in force for 53 min. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Jul 11, 2011, 8:22 AM CDT (13:22 UTC)
- Expired
- Jul 11, 2011, 9:15 AM CDT
- In force
- 53 min
- Issued by
- NWS Chicago, IL
- Area
- Storm-based polygon
- Hail
- 0.5 in
- Wind
- 70.0 mph
Counties Cook County, IL, Will County, IL, Jasper County, IN, Lake County, IN, Porter County, IN
The radar
The Chicago radar (KLOT), 56 km from the middle of the area, began a volume at 13:23 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Jul 11, 5:37 AM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
The nearest sounding before it
Lincoln, IL (KILX), launched 12:00Z, 1.4 hours before the alert went out and 176 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 4025 J/kg
- Mixed-layer CIN
- -152 J/kg
- Mixed-layer LCL
- 1373 m above ground
- 0-6 km bulk shear
- 26 kt
- 0-1 km storm-relative helicity
- 203 m²/s²
- 0-3 km storm-relative helicity
- 187 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
What forecasters said that day
The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Chicago, IL wrote its last area forecast discussion before this severe thunderstorm warning went out at Jul 11, 6:49 AM CDT, 1 hour 33 minutes earlier.
Area forecast discussion, Jul 11, 6:49 AM CDT, 1 hour 33 minutes before
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</html>Hazardous weather outlook, Jul 11, 4:53 AM CDT, 3 hours 29 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL 453 AM CDT MON JUL 11 2011 ILZ003>006-008-010>014-019>023-032-033-039-INZ001-002-010-011-019- 121000- WINNEBAGO-BOONE-MCHENRY-LAKE ILLINOIS-OGLE-LEE-DE KALB-KANE- DUPAGE-COOK-LA SALLE-KENDALL-GRUNDY-WILL-KANKAKEE-LIVINGSTON- IROQUOIS-FORD-LAKE INDIANA-PORTER-NEWTON-JASPER-BENTON- 453 AM CDT MON JUL 11 2011 /553 AM EDT MON JUL 11 2011/ THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTH CENTRAL ILLINOIS... NORTHEAST ILLINOIS AND NORTHWEST INDIANA. .DAY ONE...TODAY AND TONIGHT. WEATHER HAZARDS EXPECTED: THUNDERSTORMS...SOME OF WHICH COULD PRODUCE: HAIL TO ONE INCH. STRONG DAMAGING WIND GUSTS IN EXCESS OF 60 MPH. LOCALLY HEAVY RAINFALL. AREAS AFFECTED AND TIMING: ALL OF NORTHERN ILLINOIS AND NORTHWEST INDIANA EARLY THIS MORNING THROUGH THIS AFTERNOON. DISCUSSION: A CLUSTER OF THUNDERSTORMS WILL CONTINUE TO SHIFT EAST INTO NORTHERN ILLINOIS AND NORTHWEST INDIANA EARLY THIS MORNING AS A MID LEVEL DISTURBANCE TRACKS EAST ACROSS THE REGION. AS THESE THUNDERSTORMS MOVE EAST...THEY WILL ENCOUNTER A STRONGLY UNSTABLE AND MOISTURE RICH ATMOSPHERE WHICH WILL ENABLE THESE STORMS TO MAKE A STRONG PUSH EAST THIS MORNING. ALTHOUGH LARGE HAIL WILL BE POSSIBLE...THE MAIN THREAT WITH THESE STORMS WILL BE STRONG DAMAGING WIND GUSTS AS WELL AS LOCALLY HEAVY RAINFALL. TEMPERATURES ARE FORECAST TO REACH THE LOWER 90S WITH HIGH HUMIDITY CONTRIBUTING TO HEAT INDEX VALUES OF 105 TO 110 DEGREES SOUTH OF A LINE FROM LIVINGSTON COUNTY IN ILLINOIS EAST TO JASPER COUNTY IN INDIANA...WITH ALL OTHER AREAS IN NORTHERN ILLINOIS AND NORTHWEST INDIANA FORECAST TO OBSERVE HEAT INDEX VALUES OF AROUND 100 DEGREES. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY. THERE WILL BE PERIODIC CHANCES FOR THUNDERSTORMS TUESDAY THROUGH SATURDAY. .SPOTTER INFORMATION STATEMENT... SPOTTERS WILL LIKELY BE NEEDED EARLY THIS MORNING THROUGH THIS AFTERNOON. && COMPLETE FORECAST INFORMATION IS AVAILABLE ON THE NWS CHICAGO WEBPAGE: WEATHER.GOV/CHICAGO LMZ740>745-121000- WINTHROP HARBOR TO WILMETTE HARBOR- WILMETTE HARBOR TO NORTHERLY ISLAND- NORTHERLY ISLAND TO CALUMET HARBOR-CALUMET HARBOR TO GARY- GARY TO BURNS HARBOR-BURNS HARBOR TO MICHIGAN CITY- 453 AM CDT MON JUL 11 2011 THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE ILLINOIS NEARSHORE WATERS OF LAKE MICHIGAN AND THE INDIANA NEARSHORE WATERS OF LAKE MICHIGAN. .DAY ONE...TODAY AND TONIGHT. THERE IS A CHANCE OF THUNDERSTORMS EARLY THIS MORNING THROUGH THIS AFTERNOON WITH WINDS OF 34 KNOTS OR GREATER POSSIBLE WITH THE STRONGEST THUNDERSTORMS. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY. THERE IS A CHANCE OF THUNDERSTORMS TUESDAY THROUGH TUESDAY NIGHT AND ONCE AGAIN ON FRIDAY THROUGH FRIDAY NIGHT. && COMPLETE FORECAST INFORMATION IS AVAILABLE ON THE NWS CHICAGO WEBPAGE: WEATHER.GOV/CHICAGO LMZ080-261-362-364-366-563-565-567-669-671-673-675-777-779-868- 870-872-874-876-878-121000- LAKE MICHIGAN FROM MICHIGAN CITY IN TO ST. JOSEPH MI 5 NM OFFSHORE TO MID LAKE- LAKE MICHIGAN FROM SEUL CHOIX POINT TO ROCK ISLAND PASSAGE 5 NM OFFSHORE TO MID LAKE- LAKE MICHIGAN SOUTH OF A LINE FROM SEUL CHOIX POINT TO THE MACKINAC BRIDGE AND NORTH OF A LINE FROM CHARLEVOIX MI TO SOUTH FOX ISLAND 5 NM OFFSHORE- LAKE MICHIGAN FROM CHARLEVOIX TO POINT BETSIE MI 5 NM OFFSHORE TO MID LAKE- LAKE MICHIGAN FROM POINT BETSIE TO MANISTEE MI 5 NM OFFSHORE TO MID LAKE- LAKE MICHIGAN FROM ROCK ISLAND PASSAGE TO STURGEON BAY WI- LAKE MICHIGAN FROM STURGEON BAY TO TWO RIVERS WI 5 NM OFFSHORE TO MID LAKE- LAKE MICHIGAN FROM TWO RIVERS TO SHEBOYGAN WI 5 NM OFFSHORE TO MID LAKE- LAKE MICHIGAN FROM SHEBOYGAN TO PORT WASHINGTON WI 5 NM OFFSHORE TO MID LAKE- LAKE MICHIGAN FROM PORT WASHINGTON TO NORTH POINT LIGHT WI 5 NM OFFSHORE TO MID LAKE- LAKE MICHIGAN FROM NORTH POINT LIGHT TO WIND POINT WI 5 NM OFFSHORE TO MID LAKE- LAKE MICHIGAN FROM WIND POINT WI TO WINTHROP HARBOR IL 5 NM OFFSHORE TO MID LAKE- LAKE MICHIGAN FROM WINTHROP HARBOR TO WILMETTE HARBOR IL 5 NM OFFSHORE TO MID LAKE- LAKE MICHIGAN FROM WILMETTE HARBOR IL TO MICHIGAN CITY IN 5 NM OFFSHORE TO MID LAKE- LAKE MICHIGAN FROM PENTWATER TO MANISTEE MI 5 NM OFFSHORE TO MID LAKE- LAKE MICHIGAN FROM WHITEHALL TO PENTWATER MI 5 NM OFFSHORE TO MID LAKE- LAKE MICHIGAN FROM GRAND HAVEN TO WHITEHALL MI 5 NM OFFSHORE TO MID LAKE- LAKE MICHIGAN FROM HOLLAND TO GRAND HAVEN MI 5 NM OFFSHORE TO MID LAKE- LAKE MICHIGAN FROM SOUTH HAVEN TO HOLLAND MI 5 NM OFFSHORE TO MID LAKE- LAKE MICHIGAN FROM ST. JOSEPH TO SOUTH HAVEN MI 5 NM OFFSHORE TO MID LAKE- 453 AM CDT MON JUL 11 2011 THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE OPEN WATERS OF LAKE MICHIGAN. .DAY ONE...TODAY AND TONIGHT. THERE IS A CHANCE OF THUNDERSTORMS EARLY THIS MORNING THROUGH THIS AFTERNOON WITH WINDS OF 34 KNOTS OR GREATER POSSIBLE WITH THE STRONGEST THUNDERSTORMS. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY. THERE IS A CHANCE OF THUNDERSTORMS TUESDAY THROUGH TUESDAY NIGHT MAINLY FOR THE SOUTHERN HALF OF LAKE MICHIGAN...AND ONCE AGAIN THURSDAY NIGHT THROUGH FRIDAY NIGHT FOR THE ENTIRE LAKE. && COMPLETE FORECAST INFORMATION IS AVAILABLE ON THE NWS CHICAGO WEBPAGE: WEATHER.GOV/CHICAGO RODRIGUEZ
In the hours before
Local storm report, Jul 11, 8:04 AM CDT, 18 minutes before
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</html>Local storm report, Jul 11, 8:09 AM CDT, 13 minutes before
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</html>Local storm report, Jul 11, 8:16 AM CDT, 6 minutes before
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</html>Local storm report, Jul 11, 8:18 AM CDT, 4 minutes before
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</html>Local storm report, Jul 11, 8:20 AM CDT, 2 minutes before
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</html>The office that day
Everything else NWS Chicago, IL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 11, 4:17 AM CDT | Heat Advisory | LOT | Ford, Iroquois, Kankakee, Livingston | 15 hr |
| Jul 11, 6:16 AM CDT | Severe Thunderstorm Warning | LOT | Boone, DeKalb, LaSalle, Lee, Ogle, Winnebago | 59 min |
| Jul 11, 6:48 AM CDT | Special Marine Warning | LOT | 3 hr | |
| Jul 11, 7:03 AM CDT | Severe Thunderstorm Warning | LOT | Boone, Cook, DeKalb, DuPage, Kane, Kendall and 6 more | 57 min |
| Jul 11, 7:17 AM CDT | Severe Thunderstorm Warning | LOT | Lee, Ogle, Winnebago | 43 min |
| Jul 11, 7:44 AM CDT | Severe Thunderstorm Warning | LOT | Cook, DuPage, Kendall, Lake, Will | 46 min |
| Jul 11, 8:01 AM CDT | Special Weather Statement | LOT | Kane, McHenry | 29 min |
| Jul 11, 8:33 AM CDT | Special Weather Statement | LOT | DuPage, Kendall, Lake | 42 min |
| Jul 11, 9:31 AM CDT | Lakeshore Flood Warning | LOT | Lake | 3 hr |
Nearby
Severe Thunderstorm Warnings in Indiana, 2011Severe Thunderstorm Warnings in Illinois, 2011Every severe thunderstorm warning in 2011
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.