Alert archive / Illinois / Severe Thunderstorm Warnings in 2013
Severe Thunderstorm Warning 87, NWS Chicago, IL
NWS Chicago, IL issued this severe thunderstorm warning at Jun 27, 2013, 5:10 PM CDT for Cook County, DuPage County, Illinois. It was in force for 35 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
- Jun 27, 2013, 5:10 PM CDT (22:10 UTC)
- Expired
- Jun 27, 2013, 5:45 PM CDT
- In force
- 35 min
- Issued by
- NWS Chicago, IL
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Cook County, IL, DuPage County, IL
The radar
The Chicago radar (KLOT), 35 km from the middle of the area, began a volume at 22:12 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 nearest sounding before it
Lincoln, IL (KILX), launched 12:00Z, 10.2 hours before the alert went out and 201 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
- 2626 J/kg
- Mixed-layer CIN
- -21 J/kg
- Mixed-layer LCL
- 772 m above ground
- 0-6 km bulk shear
- 39 kt
- 0-1 km storm-relative helicity
- 60 m²/s²
- 0-3 km storm-relative helicity
- 87 m²/s²
- Significant tornado parameter
- 0.8
- Supercell composite
- 5.2
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 Jun 27, 3:05 PM CDT, 2 hours 5 minutes earlier.
Area forecast discussion, Jun 27, 3:05 PM CDT, 2 hours 5 minutes before
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</html>Hazardous weather outlook, Jun 27, 3:40 PM CDT, 1 hour 30 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL 340 PM CDT THU JUN 27 2013 ILZ003>006-008-010>014-019>023-032-033-039-INZ001-002-010-011-019- 282045- 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- 340 PM CDT THU JUN 27 2013 /440 PM EDT THU JUN 27 2013/ THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTH CENTRAL ILLINOIS... NORTHEAST ILLINOIS AND NORTHWEST INDIANA. .DAY ONE...TONIGHT. WEATHER HAZARDS EXPECTED: SCATTERED THUNDERSTORMS...SOME POSSIBLY SEVERE CAPABLE OF: HAIL TO THE SIZE OF GOLF BALLS. DAMAGING WINDS OVER 60 MPH. AND FREQUENT CLOUD TO GROUND LIGHTNING. AREAS AFFECTED AND TIMING: THUNDERSTORMS WILL BE MOST LIKELY THROUGH 10 PM....MAINLY ALONG AND NORTHEAST OF A LINE FROM NEAR DIXON TO RENSSELAER. DISCUSSION: AN UPPER LEVEL DISTURBANCE WILL MOVE ACROSS THE REGION LATE THIS AFTERNOON AND EVENING...AND LIKELY RESULT IN AT LEAST WIDELY SCATTERED THUNDERSTORMS DEVELOPING LATE THIS AFTERNOON AND LINGERING INTO THIS EVENING. VERY WARM...HUMID...AND UNSTABLE CONDITIONS ALONG WITH A STRONG JET STREAM ALOFT WILL PROVIDE FOR IDEAL CONDITIONS FOR ANY THUNDERSTORMS THAT DO FORM TO QUICKLY BECOME SEVERE. THE PRIMARY HAZARD WILL LIKELY BE LARGE HAIL...POSSIBLY UP TO GOLF BALL SIZED...ALONG WITH A SLIGHTLY LESSER THREAT OF LOCALLY DAMAGING WINDS. PORTIONS OF THE DES PLAINES...FOX...KISHWAUKEE...AND ROCK RIVERS WILL REMAIN IN FLOOD. .DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY. THERE IS A CHANCE OF THUNDERSTORMS AGAIN FRIDAY AFTERNOON AND EVENING...WITH A SLIGHT CHANCE OF THUNDERSTORMS AGAIN ON SATURDAY AFTERNOON. THE THREAT OF THUNDERSTORMS WILL RETURN BY NEXT TUESDAY. PORTIONS OF THE DES PLAINES...FOX...KISHWAUKEE...AND ROCK RIVERS WILL REMAIN IN FLOOD. HIGH WAVES MAY CREATE HAZARDOUS SWIMMING CONDITIONS THIS WEEKEND FOR AREA BEACHES. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION MAY BE NEEDED THROUGH EARLY THIS EVENING. && LMZ740>745-282045- 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- 340 PM CDT THU JUN 27 2013 THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE ILLINOIS NEARSHORE WATERS OF LAKE MICHIGAN AND THE INDIANA NEARSHORE WATERS OF LAKE MICHIGAN. .DAY ONE...TONIGHT. SCATTERED THUNDERSTORMS ARE EXPECTED TO DEVELOP LATE THIS AFTERNOON AND LINGER INTO THIS EVENING...SOME COULD PRODUCE LARGE HAIL AND WIND GUSTS OVER 50 KNOTS. .DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY. THERE WILL BE A CHANCE FOR THUNDERSTORMS FRIDAY...WITH LESSER CHANCES THIS WEEKEND BUT INCREASED CHANCES AGAIN TOWARD THE MIDDLE OF NEXT WEEK. STRONG WINDS AND HIGH WAVES MAY LEAD TO HAZARDOUS CONDITIONS FOR SMALL CRAFT SATURDAY AFTERNOON THROUGH SUNDAY. && LMZ080-261-362-364-366-563-565-567-669-671-673-675-777-779-868- 870-872-874-876-878-282045- 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- 340 PM CDT THU JUN 27 2013 THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE OPEN WATERS OF LAKE MICHIGAN. .DAY ONE...TONIGHT. SCATTERED THUNDERSTORMS ARE EXPECTED THROUGH THIS EVENING...SOME MAY PRODUCE PRODUCE LARGE HAIL AND WIND GUSTS OVER 50 KNOTS. .DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY. THERE WILL BE A CHANCE FOR THUNDERSTORMS FRIDAY...WITH LESSER CHANCES THIS WEEKEND BUT INCREASED CHANCES AGAIN TOWARD THE MIDDLE OF NEXT WEEK. && KJB VISIT US AT HTTP://WEATHER.GOV/CHICAGO (ALL LOWERCASE) FOLLOW US ON FACEBOOK...TWITTER...AND YOUTUBE AT: WWW.FACEBOOK.COM/US.NATIONALWEATHERSERVICE.CHICAGO.GOV WWW.TWITTER.COM/NWSCHICAGO WWW.YOUTUBE.COM/NWSCHICAGO
In the hours before
Local storm report, Jun 27, 12:51 PM CDT, 4 hours 19 minutes before
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</html>Local storm report, Jun 27, 1:22 PM CDT, 3 hours 48 minutes before
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</html>Special weather statement, Jun 27, 4:41 PM CDT, 29 minutes before
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</html>Local storm report, Jun 27, 4:55 PM CDT, 15 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 |
|---|---|---|---|---|
| Jun 27, 9:31 AM CDT | River Flood Advisory | LOT | Cook | 56 hr |
| Jun 27, 4:26 PM CDT | Special Weather Statement | LOT | McHenry | 19 min |
| Jun 27, 4:41 PM CDT | Special Weather Statement | LOT | Boone | 19 min |
| Jun 27, 5:21 PM CDT | Areal Flood Advisory | LOT | Cook, DuPage, Kane, Lake, McHenry | 4 hr |
| Jun 27, 5:22 PM CDT | Special Marine Warning | LOT | 83 min | |
| Jun 27, 5:34 PM CDT | Severe Thunderstorm Warning | LOT | Cook, DuPage | 56 min |
| Jun 27, 5:51 PM CDT | Flash Flood Warning | LOT | Cook, DuPage | 4 hr |
| Jun 27, 5:56 PM CDT | Special Marine Warning | LOT | 2 hr | |
| Jun 27, 6:13 PM CDT | Severe Thunderstorm Warning | LOT | Cook, Will | 62 min |
| Jun 27, 9:22 AM CDT | River Flood Watch | LOT | Lake, Newton | 12 hr |
| Jun 27, 6:53 PM CDT | Severe Thunderstorm Warning | LOT | Jasper, Lake, Porter | 52 min |
Nearby
Severe Thunderstorm Warnings in Illinois, 2013Every severe thunderstorm warning in 2013
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.