Alert archive / Illinois / Severe Thunderstorm Warnings in 2014
Severe Thunderstorm Warning 83, NWS Chicago, IL
NWS Chicago, IL issued this severe thunderstorm warning at Jun 30, 2014, 6:48 PM CDT for Kendall County, Will County, Illinois. It was in force for 27 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 30, 2014, 6:48 PM CDT (23:48 UTC)
- Expired
- Jun 30, 2014, 7:15 PM CDT
- In force
- 27 min
- Issued by
- NWS Chicago, IL
- Area
- Storm-based polygon
- Tornado
- Possible
- Hail
- 0.75 in
- Wind
- 80.0 mph
Counties Kendall County, IL, Will County, IL
The radar
The Chicago radar (KLOT), 14 km from the middle of the area, began a volume at 23:49 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 30, 3:33 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
The nearest sounding before it
Davenport, (KDVN), launched 12:00Z, 11.8 hours before the alert went out and 191 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
- 1426 J/kg
- Mixed-layer CIN
- -49 J/kg
- Mixed-layer LCL
- 544 m above ground
- 0-6 km bulk shear
- 46 kt
- 0-1 km storm-relative helicity
- 253 m²/s²
- 0-3 km storm-relative helicity
- 262 m²/s²
- Significant tornado parameter
- 2.3
- Supercell composite
- 15.0
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 30, 5:28 PM CDT, 1 hour 20 minutes earlier.
Area forecast discussion, Jun 30, 5:28 PM CDT, 1 hour 20 minutes before
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</html>Hazardous weather outlook, Jun 30, 3:28 PM CDT, 3 hours 20 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL 328 PM CDT MON JUN 30 2014 ILZ003>006-008-010>014-019>023-032-033-039-INZ001-002-010-011-019- 012030- 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- 328 PM CDT MON JUN 30 2014 /428 PM EDT MON JUN 30 2014/ THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTH CENTRAL ILLINOIS... NORTHEAST ILLINOIS AND NORTHWEST INDIANA. .DAY ONE...TONIGHT. WEATHER HAZARDS EXPECTED: SEVERE THUNDERSTORMS...SOME OF WHICH MAY PRODUCE: WIND GUSTS IN EXCESS OF 70 MPH. ISOLATED GUSTS IN EXCESS OF 90 MPH. POSSIBLY A TORNADO. HAIL UP TO 2 INCHES IN DIAMETER. TORRENTIAL RAINFALL AND LOCALIZED FLOODING. FREQUENT CLOUD TO GROUND LIGHTNING. AREAS AFFECTED AND TIMING: A LINE OF THUNDERSTORMS HAS ALREADY DEVELOPED OVER EAST CENTRAL IOWA AND IS EXPECTED TO ARRIVE OVER NORTHERN ILLINOIS AROUND 530PM CDT AND CONTINUE TO PUSH EAST NEARING NORTHWEST INDIANA BY 7 PM CDT. SOME OF THESE STORMS MAY BE SEVERE AND MAY ALSO PRODUCE LOCALLY HEAVY RAINFALL THIS EVENING. THUNDERSTORMS WILL THEN DIMINISH AND GRADUALLY MOVE EAST OF THE AREA LATER THIS EVENING. DISCUSSION: THE COMBINATION OF STRONG INSTABILITY...STRONG WINDS ALOFT... AND THE APPROACHING LOW PRESSURE IS EXPECTED TO RESULT IN SEVERE THUNDERSTORMS ARRIVING IN WEST CENTRAL ILLINOIS THIS AFTERNOON. THESE STORMS WILL SPREAD EAST INTO NORTHERN ILLINOIS AND NORTHWEST INDIANA THROUGH THE EVENING HOURS. THE LINE OF STORMS IS EXPECTED TO DEVELOP INTO AN EASTWARD MOVING COMPLEX WITH A SIGNIFICANT POTENTIAL FOR DAMAGING WINDS ACROSS NORTHERN ILLINOIS AND NORTHWEST INDIANA THIS EVENING. WIND GUSTS IN EXCESS OF 70 MPH...WITH AN ISOLATED GUST IN EXCESS OF 90 MPH POSSIBLE. PORTIONS OF THE KANKAKEE RIVERS WILL REMAIN IN FLOOD. OTHER AREA STREAMS WILL REMAIN NEAR BANKFULL CONDITIONS...HOWEVER WITH ADDITIONAL RAINFALL EXPECTED A FEW SITES MAY APPROACH FLOOD STAGE AGAIN. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY. THERE IS A SLIGHT CHANCE OF THUNDERSTORMS SATURDAY NIGHT INTO SUNDAY. PORTIONS OF THE KANKAKEE RIVERS WILL REMAIN IN FLOOD. OTHER AREA STREAMS WILL REMAIN NEAR BANKFULL CONDITIONS...HOWEVER WITH ADDITIONAL RAINFALL A FEW SITES MAY APPROACH FLOOD STAGE AGAIN. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL BE NEEDED THIS AFTERNOON THROUGH THIS EVENING. && LMZ740>745-012030- 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- 328 PM CDT MON JUN 30 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. THUNDERSTORMS ARE LIKELY THIS EVENING THROUGH TONIGHT...WITH SEVERE THUNDERSTORMS POSSIBLE DURING THE EVENING. WIND GUSTS IN EXCESS OF 60 KNOTS WILL BE POSSIBLE THIS EVENING. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY. GUSTY WEST WINDS MAY PRODUCE HAZARDOUS CONDITIONS FOR SMALL CRAFT ON TUESDAY. THERE IS A SLIGHT CHANCE OF THUNDERSTORMS SATURDAY NIGHT INTO SUNDAY. && LMZ080-261-362-364-366-563-565-567-669-671-673-675-777-779-868- 870-872-874-876-878-012030- 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- 328 PM CDT MON JUN 30 2014 THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE OPEN WATERS OF LAKE MICHIGAN. .DAY ONE...TONIGHT. THUNDERSTORMS...SOME OF WHICH MAY BE SEVERE...ARE EXPECTED OVER MUCH OF THE LAKE LATER THIS AFTERNOON AND TONIGHT. WIND GUSTS IN EXCESS OF 60 KNOTS WILL BE POSSIBLE. PATCHY DENSE FOG IS POSSIBLE ACROSS THE NORTHERN HALF OF THE LAKE THROUGH TONIGHT. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY. PATCHY DENSE FOG MAY LINGER MAINLY ACROSS NORTHERN LAKE MICHIGAN THROUGH TUESDAY. THERE IS A SLIGHT CHANCE OF THUNDERSTORMS SATURDAY NIGHT INTO SUNDAY. && BEACHLER 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 30, 6:26 PM CDT, 22 minutes before
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</html>Local storm report, Jun 30, 6:28 PM CDT, 20 minutes before
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</html>Local storm report, Jun 30, 6:34 PM CDT, 14 minutes before
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</html>Local storm report, Jun 30, 6:36 PM CDT, 12 minutes before
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</html>Local storm report, Jun 30, 6:39 PM CDT, 9 minutes before
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</html>Local storm report, Jun 30, 6:47 PM CDT, 1 minute 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 30, 12:03 AM CDT | Special Weather Statement | LOT | Winnebago | 27 min |
| Jun 30, 12:21 AM CDT | Severe Thunderstorm Warning | LOT | Boone, McHenry, Winnebago | 54 min |
| Jun 30, 12:34 AM CDT | Severe Thunderstorm Warning | LOT | Lee, Ogle | 56 min |
| Jun 30, 1:16 AM CDT | Severe Thunderstorm Warning | LOT | DeKalb, LaSalle, Lee, Ogle | 44 min |
| Jun 30, 1:23 AM CDT | Areal Flood Advisory | LOT | Boone, Winnebago | 6 hr |
| Jun 30, 1:50 AM CDT | Tornado Warning | LOT | McHenry | 40 min |
| Jun 30, 1:57 AM CDT | Special Weather Statement | LOT | DeKalb, Kane, Kendall | 33 min |
| Jun 30, 2:31 AM CDT | Special Weather Statement | LOT | Lake | 29 min |
| Jun 30, 2:52 AM CDT | Special Weather Statement | LOT | LaSalle | 23 min |
| Jun 30, 3:12 AM CDT | Special Weather Statement | LOT | Grundy, Livingston | 33 min |
| Jun 30, 3:45 AM CDT | Special Weather Statement | LOT | Lake | 45 min |
| Jun 30, 3:52 AM CDT | Special Marine Warning | LOT | 83 min | |
| Jun 30, 4:12 AM CDT | Flash Flood Watch | LOT | Boone, DeKalb, DuPage, Grundy, Kane, Kankakee and 8 more | 21 hr |
| Jun 30, 4:35 AM CDT | Areal Flood Advisory | LOT | Grundy, LaSalle, Livingston | 4 hr |
| Jun 30, 5:51 AM CDT | Severe Thunderstorm Warning | LOT | Ford, Iroquois, Livingston | 54 min |
| Jun 30, 6:21 AM CDT | Special Marine Warning | LOT | 54 min | |
| Jun 30, 6:30 AM CDT | Severe Thunderstorm Warning | LOT | Ford, Iroquois | 60 min |
| Jun 30, 6:44 AM CDT | Areal Flood Advisory | LOT | Ford, Iroquois, Livingston | 6 hr |
| Jun 30, 10:03 AM CDT | River Flood Watch | LOT | Winnebago | 8 days |
| Jun 30, 10:03 AM CDT | River Flood Watch | LOT | Winnebago | 7 days |
| Jun 30, 10:03 AM CDT | River Flood Watch | LOT | Ogle | 5 days |
| Jun 30, 10:03 AM CDT | River Flood Watch | LOT | Winnebago | 4 days |
| Jun 30, 11:08 AM CDT | River Flood Watch | LOT | Lake | 7 days |
| Jun 30, 11:27 AM CDT | River Flood Watch | LOT | LaSalle | 4 days |
| Jun 30, 12:27 PM CDT | River Flood Advisory | LOT | Kane, Kendall | 7 days |
| Jun 30, 3:47 PM CDT | Special Weather Statement | LOT | Boone, Cook, DeKalb, DuPage, Grundy, Kane and 10 more | 43 min |
| Jun 30, 4:53 PM CDT | Areal Flood Advisory | LOT | Lee, Ogle, Winnebago | 6 hr |
| Jun 30, 5:30 PM CDT | Special Marine Warning | LOT | 2 hr | |
| Jun 30, 6:14 PM CDT | Severe Thunderstorm Warning | LOT | Cook, DeKalb, DuPage, Kane, Kendall, Will | 61 min |
| Jun 30, 6:22 PM CDT | Special Marine Warning | LOT | 113 min | |
| Jun 30, 6:24 PM CDT | Areal Flood Advisory | LOT | Cook, DuPage, Kane, Kendall, Lake, Will | 4 hr |
Nearby
Severe Thunderstorm Warnings in Illinois, 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.