Alert archive / Illinois / Severe Thunderstorm Warnings in 2014
Severe Thunderstorm Warning 73, NWS Chicago, IL
NWS Chicago, IL issued this severe thunderstorm warning at Jun 21, 2014, 6:32 PM CDT for Cook County, Kankakee County, Will County, Illinois; Lake County, Porter County, Indiana. It was in force for 58 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 21, 2014, 6:32 PM CDT (23:32 UTC)
- Expired
- Jun 21, 2014, 7:30 PM CDT
- In force
- 58 min
- Issued by
- NWS Chicago, IL
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties Cook County, IL, Kankakee County, IL, Will County, IL, Lake County, IN, Porter County, IN
The radar
The Chicago radar (KLOT), 43 km from the middle of the area, began a volume at 23:35 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 21, 1:33 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
The nearest sounding before it
Lincoln, IL (KILX), launched 12:00Z, 11.5 hours before the alert went out and 172 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
- 47 J/kg
- Mixed-layer CIN
- -222 J/kg
- Mixed-layer LCL
- 1469 m above ground
- 0-6 km bulk shear
- 13 kt
- 0-1 km storm-relative helicity
- 44 m²/s²
- 0-3 km storm-relative helicity
- 34 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 Jun 21, 5:20 PM CDT, 1 hour 12 minutes earlier.
Area forecast discussion, Jun 21, 5:20 PM CDT, 1 hour 12 minutes before
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</html>Hazardous weather outlook, Jun 21, 3:38 PM CDT, 2 hours 54 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL 338 PM CDT SAT JUN 21 2014 ILZ003>006-008-010>014-019>023-032-033-039-INZ001-002-010-011-019- 222045- 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- 338 PM CDT SAT JUN 21 2014 /438 PM EDT SAT JUN 21 2014/ THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTH CENTRAL ILLINOIS... NORTHEAST ILLINOIS AND NORTHWEST INDIANA. .DAY ONE...TONIGHT. WEATHER HAZARDS EXPECTED: THUNDERSTORMS...A FEW OF WHICH MAY PRODUCE: WIND GUSTS TO 60 MPH. TORRENTIAL DOWNPOURS AND LOCALIZED FLASH FLOODING. FREQUENT LIGHTNING. HAIL TO THE SIZE OF QUARTERS OR SLIGHTLY LARGER. AREAS AFFECTED AND TIMING: SCATTERED THUNDERSTORM WILL OCCUR ACROSS THE AREA INTO EARLY THIS EVENING. REGENERATION OF SCATTERED STORMS MAY CONTINUE LATER THIS EVENING INTO OVERNIGHT...MAINLY FOR AREAS ALONG AND SOUTH OF INTERSTATE 80. DISCUSSION: AS AN UPPER LEVEL DISTURBANCE MOVES EASTWARD ACROSS THE AREA INTO EARLY THIS EVENING..SCATTERED THUNDERSTORMS WILL CONTINUE TO DEVELOP. THE ATMOSPHERE IS FAVORABLE FOR A FEW STORMS OR CLUSTERS OF STORMS TO BECOME SEVERE... PRODUCING DAMAGING WINDS. ISOLATED INSTANCES OF HAIL UP TO THE SIZE OF A QUARTER ARE ALSO POSSIBLE. CONTINUED UNSTABLE AIR LATER TONIGHT MAY SUPPORT SCATTERED STORMS ACROSS THE AREA...ESPECIALLY SOUTH OF INTERSTATE 80. WATER LEVELS ALONG PORTIONS OF THE DUPAGE...ILLINOIS.. IROQUOIS...AND DES PLAINES RIVERS WILL REMAIN ELEVATED. .DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY. THERE WILL BE PERIODIC CHANCES FOR THUNDERSTORMS SUNDAY THROUGH FRIDAY. THE MOST LIKELY PERIODS FOR STRONGER AND MORE ORGANIZED THUNDERSTORMS ARE MONDAY AND MONDAY NIGHT. WATER LEVELS ALONG PORTIONS OF THE DUPAGE...ILLINOIS.. IROQUOIS...AND DES PLAINES RIVERS WILL REMAIN ELEVATED. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL BE NEEDED THROUGH EARLY THIS EVENING. && LMZ740>745-222045- 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- 338 PM CDT SAT JUN 21 2014 THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE ILLINOIS NEARSHORE WATERS OF LAKE MICHIGAN AND THE INDIANA NEARSHORE WATERS OF LAKE MICHIGAN. .DAY ONE...TONIGHT. AREAS OF DENSE FOG ARE LIKELY. SCATTERED THUNDERSTORMS ARE POSSIBLE INTO THIS EVENING...SOME OF WHICH MAY BECOME SEVERE AND PRODUCE WINDS IN EXCESS OF 35 KNOTS AND HAIL. .DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY. AREAS OF DENSE FOG ARE POSSIBLE SUNDAY THROUGH SUNDAY NIGHT. THERE WILL BE PERIODIC CHANCES FOR THUNDERSTORMS SUNDAY THROUGH FRIDAY. && LMZ080-261-362-364-366-563-565-567-669-671-673-675-777-779-868- 870-872-874-876-878-222045- 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- 338 PM CDT SAT JUN 21 2014 THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE OPEN WATERS OF LAKE MICHIGAN. .DAY ONE...TONIGHT. AREAS OF DENSE FOG WILL CONTINUE. SCATTERED THUNDERSTORMS ARE POSSIBLE ACROSS MAINLY THE SOUTHERN PART OF THE LAKE INTO THIS EVENING....SOME OF WHICH MAY PRODUCE WINDS IN EXCESS OF 35 KNOTS. .DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY. AREAS OF DENSE FOG ARE POSSIBLE SUNDAY AND SUNDAY NIGHT. THERE WILL BE PERIODIC CHANCES FOR THUNDERSTORMS SUNDAY THROUGH FRIDAY. && RC 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 21, 6:08 PM CDT, 24 minutes before
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</html>Local storm report, Jun 21, 6:09 PM CDT, 23 minutes before
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</html>Local storm report, Jun 21, 6:14 PM CDT, 18 minutes before
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</html>Local storm report, Jun 21, 6:18 PM CDT, 14 minutes before
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</html>Local storm report, Jun 21, 6:27 PM CDT, 5 minutes before
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</html>Local storm report, Jun 21, 6:30 PM 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 |
|---|---|---|---|---|
| Jun 20, 7:22 PM CDT | Dense Fog Advisory | LOT | Lake | 14 hr |
| Jun 20, 9:01 PM CDT | River Flood Advisory | LOT | LaSalle | 48 hr |
| Jun 20, 9:01 PM CDT | River Flood Advisory | LOT | Bureau, LaSalle | 58 hr |
| Jun 21, 12:39 PM CDT | Special Weather Statement | LOT | Kendall | 36 min |
| Jun 21, 1:11 PM CDT | Special Weather Statement | LOT | Will | 34 min |
| Jun 21, 1:16 PM CDT | Severe Thunderstorm Warning | LOT | Cook, Grundy, Kankakee, Will | 44 min |
| Jun 21, 2:42 PM CDT | Severe Thunderstorm Warning | LOT | Grundy, Iroquois, Kankakee, Livingston, Will | 48 min |
| Jun 21, 3:28 PM CDT | Severe Thunderstorm Warning | LOT | Iroquois, Kankakee, Livingston | 62 min |
| Jun 21, 3:35 PM CDT | Special Weather Statement | LOT | Winnebago | 40 min |
| Jun 21, 3:41 PM CDT | Areal Flood Advisory | LOT | Grundy, Iroquois, Kankakee, LaSalle, Livingston | 6 hr |
| Jun 21, 4:01 PM CDT | Special Weather Statement | LOT | Lee | 44 min |
| Jun 21, 4:09 PM CDT | Severe Thunderstorm Warning | LOT | Iroquois | 49 min |
| Jun 21, 4:17 PM CDT | Severe Thunderstorm Warning | LOT | Cook, Lake, McHenry | 58 min |
| Jun 21, 4:23 PM CDT | Tornado Warning | LOT | Lake, McHenry | 34 min |
| Jun 21, 4:40 PM CDT | Severe Thunderstorm Warning | LOT | LaSalle, Lee | 52 min |
| Jun 21, 4:41 PM CDT | Special Marine Warning | LOT | 2 hr | |
| Jun 21, 4:46 PM CDT | Severe Thunderstorm Warning | LOT | Iroquois | 47 min |
| Jun 21, 4:51 PM CDT | Tornado Warning | LOT | Iroquois | 39 min |
| Jun 21, 5:07 PM CDT | Severe Thunderstorm Warning | LOT | Cook, DuPage, Kane, Lake | 53 min |
| Jun 21, 5:11 PM CDT | Areal Flood Advisory | LOT | Cook, DeKalb, DuPage, Kane, Lake, Lee and 2 more | 6 hr |
| Jun 21, 5:36 PM CDT | Flash Flood Warning | LOT | Cook, DuPage | 6 hr |
| Jun 21, 5:37 PM CDT | Special Marine Warning | LOT | 83 min | |
| Jun 21, 5:42 PM CDT | Areal Flood Advisory | LOT | Iroquois | 6 hr |
| Jun 21, 5:44 PM CDT | Severe Thunderstorm Warning | LOT | Cook, DuPage, Grundy, Kane, Kendall, Will | 61 min |
| Jun 21, 5:56 PM CDT | Areal Flood Advisory | LOT | DeKalb, Grundy, Kane, Kendall, Will | 6 hr |
| Jun 21, 6:36 PM CDT | Flash Flood Warning | LOT | Lake | 6 hr |
Nearby
Severe Thunderstorm Warnings in Illinois, 2014Severe Thunderstorm Warnings in Indiana, 2014Every severe thunderstorm warning in 2014
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.