Alert archive / Illinois / Severe Thunderstorm Warnings in 2008
Severe Thunderstorm Warning 98, NWS Chicago, IL
NWS Chicago, IL issued this severe thunderstorm warning at Jun 15, 2008, 4:32 PM CDT for Ford County, Iroquois County, Livingston County, Illinois. It was in force for 46 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 15, 2008, 4:32 PM CDT (21:32 UTC)
- Expired
- Jun 15, 2008, 5:18 PM CDT
- In force
- 46 min
- Issued by
- NWS Chicago, IL
- Area
- Storm-based polygon
Counties Ford County, IL, Iroquois County, IL, Livingston County, IL
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 15, 11:42 AM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
The nearest sounding before it
Lincoln, IL (KILX), launched 12:00Z, 9.5 hours before the alert went out and 74 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
- 325 J/kg
- Mixed-layer CIN
- -194 J/kg
- Mixed-layer LCL
- 1628 m above ground
- 0-6 km bulk shear
- 52 kt
- 0-1 km storm-relative helicity
- 38 m²/s²
- 0-3 km storm-relative helicity
- 172 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.8
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 15, 3:05 PM CDT, 1 hour 27 minutes earlier.
Area forecast discussion, Jun 15, 3:05 PM CDT, 1 hour 27 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL 305 PM CDT SUN JUN 15 2008 .DISCUSSION... 305 PM...ABBREVIATED DISCUSSION WITH ONGOING CONVECTION AND EQUIPMENT ISSUES. MAIN FOCUS THIS AFTERNOON REMAINS CONVECTION THROUGH TONIGHT. THUNDERSTORMS OVER WESTERN IL HAVE CONTINUED TO BUILD NORTHWEST ACROSS NORTHEAST IL OVER THE PAST HR OR SO...ALONG A TONGUE OF HIGHER MOISTURE AND INCREASING DEWPOINTS. HAVE EXPANDED SVR WATCH 540 TO INCLUDE THE CHICAGO METRO AREA AND NORTHWEST INDIANA AHEAD OF THIS LINE. INDIVIDUAL CELLS TO START SHOULD EVENTUALLY EVOLVE INTO A LINE OF THUNDERSTORMS AS THEY SHIFT EAST ACROSS THE CWA. WILL CONTINUE WITH LIKELY POPS THIS EVENING WITH MENTION OF SVR THEN CHANCE ACROSS THE SOUTHEAST TONIGHT. LITTLE CHANGE TO REMAINDER OF THE FORECAST. NORTHWEST FLOW WILL ALLOW FOR A MAINLY DRY EARLY/MID WEEK WITH COOLER TEMPS...ONLY IN THE 70S THROUGH MID WEEK. ANY PRECIP EXPECTED TO REMAIN NORTH OF THE AREA MONDAY NIGHT AND TUESDAY. CMS && .AVIATION... 114 PM CDT 18Z TAFORS...LARGE BOWING LN OF TSRA FM FAR SE IA SW TO NE KS PUSHING SEWRD. GREATEST DEVELOPMENT ALONG WESTERN END IN NE KS AND FAR SE NEB BUT WITH DEW POINTS IN THE UPPER 60S AND LOWER 70S FEEDING NEWRD ACROSS THE MS RIVER INTO W CENTRAL AND NW IL UNDER STEEP MID LVL LAPSE RATES AREA FM SE AND NW IL S ACROSS NE MO AND W CENTRAL IL DESTABILIZING AS SFC TEMPS CLIMB INTO THE LOWER AND MID 80S WITH HEATING. WITH SB LI OF -7 TO -9 AND SB CAPE OF 2500 TO 3000 EXPECT SOME CELLS TO GET GOING IN THIS AREA OF MAX INSTABILITY AS SHORT WAVE TROF SEEN IN BACKING/VEERING SIGNATURE IN MID LVL WINDS FM SLATER IA MOVS E ACROSS THE MS RIVER. TSRA SHUD MOVE QUICKLY E-ESE AND OUT OF IMMEDIATE AREA LEAVING STABILIZED AIR IN PLACE FOR LATE AFTERNOON AND THIS EVE AHEAD OF CDFNT CURRENTLY RUNNING FM NE WI SWWRD ACROSS EXTREME SE MN AND N CENTRAL AND WESTERN IA. THIS BOUNDARY EXPECTED TO PASS ACROSS THE TERMINALS LATE EVE/OVERNIGHT WITH NIL CHC OF PCPN. TRS && .MARINE... 225 PM CDT COLD FRONT FROM EASTERN LK SUPERIOR SOUTHWESTWARD INTO IA WILL CONTINUE TO PUSH E AND ACROSS LK MI TONIGHT. HIGH PRES THEN SLOWLY BUILDS ACROSS THE NORTHERN AND CENTRAL PLAINS MON AND TUE...AND EVENTUALLY ACROSS THE MID MS AND LOWER OH VALLEYS MID WEEK. TRS && .LOT WATCHES/WARNINGS/ADVISORIES... IL...NONE. IN...NONE. LM...NONE. &&
Hazardous weather outlook, Jun 15, 4:30 PM CDT, 2 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>In the hours before
Local storm report, Jun 15, 4:01 PM CDT, 31 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>Local storm report, Jun 15, 4:03 PM CDT, 29 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>Local storm report, Jun 15, 4:05 PM CDT, 27 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>Local storm report, Jun 15, 4:07 PM CDT, 25 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>Local storm report, Jun 15, 4:11 PM CDT, 21 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>Local storm report, Jun 15, 4:18 PM CDT, 14 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>The office that day
Everything else NWS Chicago, IL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 15, 6:25 AM CDT | Severe Thunderstorm Warning | LOT | DeKalb, Kane, Lee, Ogle | 50 min |
| Jun 15, 6:32 AM CDT | Special Marine Warning | LOT | 118 min | |
| Jun 15, 6:49 AM CDT | Severe Thunderstorm Warning | LOT | DeKalb, Kane, Kendall, LaSalle, Lee | 41 min |
| Jun 15, 7:00 AM CDT | Severe Thunderstorm Warning | LOT | Cook, DuPage, Will | 60 min |
| Jun 15, 8:34 AM CDT | Special Marine Warning | LOT | 51 min | |
| Jun 15, 9:21 AM CDT | River Flood Advisory | LOT | Cook | 18 hr |
| Jun 15, 2:23 PM CDT | Severe Thunderstorm Warning | LOT | LaSalle | 67 min |
| Jun 15, 2:51 PM CDT | Severe Thunderstorm Warning | LOT | DeKalb, DuPage, Kane, Kendall, LaSalle, Will | 39 min |
| Jun 15, 3:01 PM CDT | Severe Thunderstorm Warning | LOT | LaSalle, Livingston | 59 min |
| Jun 15, 3:17 PM CDT | Flash Flood Warning | LOT | LaSalle | 3 hr |
| Jun 15, 3:23 PM CDT | Severe Thunderstorm Warning | LOT | Cook, Grundy, Kendall, Will | 50 min |
| Jun 15, 3:26 PM CDT | Severe Thunderstorm Warning | LOT | Kankakee, Will | 64 min |
| Jun 15, 3:51 PM CDT | Areal Flood Advisory | LOT | Kankakee, Will | 3 hr |
| Jun 15, 4:15 PM CDT | Areal Flood Advisory | LOT | Kankakee, Will | 3 hr |
| Jun 15, 4:46 PM CDT | Severe Thunderstorm Warning | LOT | Iroquois | 40 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.