Alert archive / Illinois / Severe Thunderstorm Warnings in 2008
Severe Thunderstorm Warning 66, NWS Chicago, IL
NWS Chicago, IL issued this severe thunderstorm warning at Jun 7, 2008, 3:57 PM CDT for Winnebago County, Illinois. It was in force for 31 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 7, 2008, 3:57 PM CDT (20:57 UTC)
- Expired
- Jun 7, 2008, 4:28 PM CDT
- In force
- 31 min
- Issued by
- NWS Chicago, IL
- Area
- Storm-based polygon
County Winnebago County, IL
The radar
The Milwaukee radar (KMKX), 86 km from the middle of the area, began a volume at 21:00 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 |
|---|---|---|---|
| Jun 7, 2:01 PM CDT | Tornado Watch | SPC | 6 hr |
The nearest sounding before it
Davenport, (KDVN), launched 12:00Z, 9.0 hours before the alert went out and 136 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
- 2173 J/kg
- Mixed-layer CIN
- -30 J/kg
- Mixed-layer LCL
- 584 m above ground
- 0-6 km bulk shear
- 50 kt
- 0-1 km storm-relative helicity
- 173 m²/s²
- 0-3 km storm-relative helicity
- 96 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 10.7
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 7, 3:52 PM CDT, 5 minutes earlier.
Area forecast discussion, Jun 7, 3:52 PM CDT, 5 minutes before
<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>Service Notice</title>
<link rel="stylesheet" href="index.css">
</head>
<body>
<main class="wrap">
<section class="card" role="status" aria-live="polite">
<div class="status" id="status">Temporary Notice</div>
<h1 id="headline">This service is currently unavailable.</h1>
<p id="message1">
The site you requested is temporarily down for maintenance or an unexpected outage.
</p>
<p id="message2">
Please try again in a few minutes.
</p>
<p class="small" id="detail">
If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
</p>
</section>
</main>
<script src="index.js"></script>
</body>
</html>Hazardous weather outlook, Jun 7, 11:09 AM CDT, 4 hours 48 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
1109 AM CDT SAT JUN 7 2008
ILZ003>006-008-010>014-019>023-032-033-039-INZ001-002-010-011-019-
081615-
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-
1109 AM CDT SAT JUN 7 2008 /1209 PM EDT SAT JUN 7 2008/
THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF NORTH CENTRAL
ILLINOIS...NORTHEAST ILLINOIS AND NORTHWEST INDIANA.
.DAY ONE...TODAY AND TONIGHT.
WEATHER HAZARDS EXPECTED:
THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS OVER THE ENTIRE
OUTLOOK AREA. SCATTERED THUNDERSTORMS MAY PRODUCE...
FREQUENT CLOUD TO GROUND LIGHTNING.
LOCALLY HEAVY RAINFALL
LARGE HAIL
WIND GUSTS AROUND 60 MPH.
CHANCE OF AN ISOLATED TORNADO
AREAS AFFECTED AND TIMING:
THUNDERSTORMS WILL BECOME MORE NUMEROUS AS THE DAY PROGRESSES...
WITH THE GREATEST THREAT OF STORMS THIS AFTERNOON AND EARLY
EVENING. ALTHOUGH THERE IS A SLIGHT RISK OVER THE ENTIRE
AREA...THE GREATEST CHANCE OF SEVERE WEATHER IS EXPECTED TO BE
OVER EXTREME NORTHERN ILLINOIS.
DISCUSSION:
THUNDERSTORMS HAVE BEEN ONGOING ACROSS FAR SOUTHERN PORTIONS OF
THE OUTLOOK AREA...SOUTH OF PONTIAC AND KANKAKEE IN ILLINOIS AND
FROM FOWLER SOUTHWARD IN NORTHWEST INDIANA. SCATTERED
THUNDERSTORMS WILL LIKELY CONTINUE THIS AFTERNOON IN THESE AREAS
IN RESPONSE TO LIFT ALONG A BOUNDARY WHICH STRETCHES ACROSS
CENTRAL ILLINOIS AND CENTRAL INDIANA. WARM...MOIST SOUTHWESTERLY
FLOW CONTINUES TO CONVERGE INTO THIS BOUNDARY...AND THIS BOUNDARY
IS EXPECTED TO DEVELOP NORTHWARD THIS AFTERNOON BRINGING AN
INCREASED THREAT OF THUNDERSTORMS TO THE REMAINDER OF THE OUTLOOK
AREA. IN ADDITION...OTHER THUNDERSTORMS ARE EXPECTED TO DEVELOP
ACROSS NORTHERN IOWA...SOUTHERN MINNESOTA AND WESTERN WISCONSIN
THIS AFTERNOON...AND THESE STORMS MAY DEVELOP INTO PORTIONS OF
NORTHWEST AND NORTH CENTRAL ILLINOIS THIS AFTERNOON. THIS
AREA WILL LIKELY EXPERIENCE MORE SUNSHINE AND DESTABILIZATION
THAN AREAS FARTHER SOUTHEAST WHICH HAVE SEEN CLOUDS AND RAIN THIS
MORNING. BECAUSE OF THIS... THE GREATEST CHANCE OF LARGE HAIL AND
ISOLATED TORNADOES ASSOCIATED WITH SUPERCELL STRUCTURES WILL BE
OVER EXTREME NORTHERN ILLINOIS WHERE GREATER INSTABILITY IS
EXPECTED. ELSEWHERE...THE THREAT WILL BE MORE FOR
BRIEF...MARGINALLY SEVERE HAIL AND WIND GUSTS.
STORMS ARE EXPECTED TO BECOME MORE CONCENTRATED TO THE WEST AND
NORTH OF THE REGION OVERNIGHT WHERE LOW LEVEL CONVERGENCE WILL BE
MAXIMIZED.
PORTIONS OF THE KANKAKEE AND ILLINOIS RIVERS WILL REMAIN IN
FLOOD.
.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY.
THERE IS A CHANCE OF THUNDERSTORMS THROUGH MONDAY. THERE IS A
SLIGHT RISK THAT SOME OF THESE STORMS MAY BE SEVERE...DEPENDING
ON
TIMING. THUNDERSTORMS ARE EXPECTED TO BE MOST NUMEROUS SUNDAY
NIGHT
INTO MONDAY.
STORMS ARE POSSIBLE AGAIN WEDNESDAY NIGHT OR THURSDAY.
PORTIONS OF THE KANKAKEE AND ILLINOIS RIVERS WILL REMAIN IN
FLOOD THROUGH THE WEEKEND.
.SPOTTER INFORMATION STATEMENT...
SPOTTER ACTIVATION MAY BE NEEDED LATER THIS AFTERNOON AND
EVENING...PARTICULARLY OVER NORTH CENTRAL ILLINOIS.
&&
COMPLETE FORECAST INFORMATION IS AVAILABLE ON THE NWS CHICAGO
WEBPAGE: WEATHER.GOV/CHICAGO
LMZ740>745-081615-
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-
1109 AM CDT SAT JUN 7 2008
THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF THE ILLINOIS
NEARSHORE WATERS OF LAKE MICHIGAN AND THE INDIANA NEARSHORE
WATERS OF LAKE MICHIGAN.
.DAY ONE...TODAY AND TONIGHT.
A SMALL CRAFT ADVISORY IS IN EFFECT FROM 1000 AM CDT UNTIL 900 PM
CDT.
STRONG SOUTH TO SOUTHWEST WINDS WILL LEAD TO HAZARDOUS CONDITIONS
FOR SMALL CRAFT.
SHOWERS AND THUNDERSTORMS ARE POSSIBLE THIS AFTERNOON AND TONIGHT.
.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY.
THERE WILL BE PERIODIC CHANCES OF THUNDERSTORMS SUNDAY AND
MONDAY...AND AGAIN BY WEDNESDAY 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-
870-872-874-876-878-081615-
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 TOW 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-
1109 AM CDT SAT JUN 7 2008
THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF THE OPEN WATERS
OF LAKE MICHIGAN.
.DAY ONE...TODAY AND TONIGHT.
THERE IS A CHANCE OF THUNDERSTORMS ACROSS LAKE MICHIGAN THIS
AFTERNOON AND TONIGHT.
.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY.
THERE WILL BE PERIODS OF THUNDERSTORMS SUNDAY AND MONDAY...AND
AGAIN
BY WEDNESDAY NIGHT.
&&
COMPLETE FORECAST INFORMATION IS AVAILABLE ON THE NWS CHICAGO
WEBPAGE: WEATHER.GOV/CHICAGO
RATZERThe office that day
Everything else NWS Chicago, IL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 7, 3:10 PM CDT | Severe Thunderstorm Warning | LOT | Lee, Ogle | 65 min |
| Jun 7, 3:38 PM CDT | Tornado Warning | LOT | LaSalle, Livingston | 41 min |
| Jun 7, 3:48 PM CDT | Tornado Warning | LOT | LaSalle, Livingston | 57 min |
| Jun 7, 4:28 PM CDT | Tornado Warning | LOT | Grundy, Livingston | 47 min |
| Jun 7, 5:07 PM CDT | Severe Thunderstorm Warning | LOT | Cook, Lake | 32 min |
| Jun 7, 5:21 PM CDT | Tornado Warning | LOT | Cook, Will | 54 min |
| Jun 7, 5:29 PM CDT | Special Marine Warning | LOT | 61 min | |
| Jun 7, 5:45 PM CDT | Tornado Warning | LOT | Kankakee, Will | 60 min |
| Jun 7, 5:47 PM CDT | Special Marine Warning | LOT | 118 min | |
| Jun 7, 6:08 PM CDT | Tornado Warning | LOT | Cook, Will | 67 min |
| Jun 7, 6:32 PM CDT | Tornado Warning | LOT | Cook | 50 min |
| Jun 7, 6:36 PM CDT | Severe Thunderstorm Warning | LOT | Cook, DuPage | 24 min |
Nearby
Severe Thunderstorm Warnings in Illinois, 2008Every severe thunderstorm warning in 2008
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.