Alert archive / Illinois / Severe Thunderstorm Warnings in 2013
Severe Thunderstorm Warning 36, NWS Chicago, IL
NWS Chicago, IL issued this severe thunderstorm warning at May 31, 2013, 5:20 PM CDT for 4 counties in Illinois. It was in force for 70 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
- May 31, 2013, 5:20 PM CDT (22:20 UTC)
- Expired
- May 31, 2013, 6:30 PM CDT
- In force
- 70 min
- Issued by
- NWS Chicago, IL
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 70.0 mph
Counties Ford County, IL, Iroquois County, IL, Kankakee County, IL, Livingston County, IL
The radar
The Chicago radar (KLOT), 85 km from the middle of the area, began a volume at 22:23 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, 10.3 hours before the alert went out and 87 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
- 8 J/kg
- Mixed-layer CIN
- -299 J/kg
- Mixed-layer LCL
- 1021 m above ground
- 0-6 km bulk shear
- 40 kt
- 0-1 km storm-relative helicity
- 215 m²/s²
- 0-3 km storm-relative helicity
- 222 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
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 May 31, 3:37 PM CDT, 1 hour 43 minutes earlier.
Area forecast discussion, May 31, 3:37 PM CDT, 1 hour 43 minutes before
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</html>Hazardous weather outlook, May 31, 4:41 PM CDT, 39 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL 441 PM CDT FRI MAY 31 2013 ILZ003>006-008-010>014-019>023-032-033-039-INZ001-002-010-011-019- 012145- 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- 441 PM CDT FRI MAY 31 2013 /541 PM EDT FRI MAY 31 2013/ THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTH CENTRAL ILLINOIS... NORTHEAST ILLINOIS AND NORTHWEST INDIANA. .DAY ONE...TONIGHT. WEATHER HAZARDS EXPECTED: THUNDERSTORMS...SOME MAY PRODUCE: DAMAGING WIND GUSTS IN EXCESS OF 60 MPH. HEAVY RAIN WHICH MAY CAUSE FLASH FLOODING. QUARTER SIZE HAIL. FREQUENT CLOUD TO GROUND LIGHTNING AREAS AFFECTED AND TIMING: THUNDERSTORMS ARE EXPECTED TO CONTINUE ACROSS CENTRAL ILLINOIS AND SHOULD OVERSPREAD EAST CENTRAL ILLINOIS AND NORTHWESTERN INDIANA DURING THE EVENING. DISCUSSION: SHOWERS AND THUNDERSTORMS ARE EXPECTED TO PERSIST TONIGHT ACROSS CENTRAL MISSOURI THROUGH ILLINOIS INTO NORTHWEST INDIANA. SOME OF THESE STORMS WILL HAVE THE POTENTIAL TO PRODUCE VERY HEAVY RAINFALL OF 1 TO 2 INCHES PER HOUR...WHICH WOULD RESULT IN FLASH FLOODING. THE ANTICIPATED CORRIDOR OF HEAVY RAIN HAS SHIFTED FARTHER SOUTH THAN PREVIOUSLY THOUGHT...AND NOW WILL BE MAINLY SOUTH OF INTERSTATE 80 ACROSS PORTIONS OF CENTRAL ILLINOIS AND NORTHWESTERN INDIANA. SOME OF THESE THUNDERSTORMS ALSO COULD BECOME SEVERE...WITH LARGE HAIL AND DAMAGING WIND GUSTS BEING THE MAIN THREAT. PORTIONS OF THE ILLINOIS AND VERMILION RIVERS WILL REMAIN IN FLOOD. .DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY. ANOTHER ROUND OF THUNDERSTORMS IS EXPECTED SATURDAY AFTERNOON INTO SATURDAY EVENING...MAINLY ALONG AND EAST OF THE INTERSTATE 55 CORRIDOR. THESE STORMS MAY BECOME SEVERE WITH DAMAGING WINDS THE MAIN THREAT. HEAVY RAIN AND FLASH FLOODING WILL ALSO BE POSSIBLE. THERE IS A CHANCE OF THUNDERSTORMS TUESDAY AFTERNOON THROUGH THURSDAY. PORTIONS OF THE ILLINOIS AND VERMILION RIVERS WILL REMAIN IN FLOOD. RISES ON OTHER AREA RIVERS ARE POSSIBLE AS WELL. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION MAY BE NEEDED EARLY THIS EVENING...ESPECIALLY SOUTH OF INTERSTATE 80. && LMZ740>745-012145- 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- 441 PM CDT FRI MAY 31 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. THERE IS A CHANCE OF THUNDERSTORMS TONIGHT. STRONG WINDS WILL CREATE HAZARDOUS CONDITIONS FOR SMALL CRAFT IN THE INDIANA NEARSHORE WATERS THROUGH THIS EVENING. .DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY. THERE IS A CHANCE OF THUNDERSTORMS SATURDAY AFTERNOON AND EVENING. THESE STORMS MAY PRODUCE WIND GUSTS 35 KNOTS OR HIGHER AS WELL AS LARGE HAIL. THERE IS A CHANCE OF THUNDERSTORMS TUESDAY NIGHT THROUGH THURSDAY. && LMZ080-261-362-364-366-563-565-567-669-671-673-675-777-779-868- 870-872-874-876-878-012145- 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- 441 PM CDT FRI MAY 31 2013 THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE OPEN WATERS OF LAKE MICHIGAN. .DAY ONE...TONIGHT. THERE IS A CHANCE OF THUNDERSTORMS TONIGHT. AREAS OF DENSE FOG ARE EXPECTED ACROSS MOST OF THE LAKE TODAY AND TONIGHT. .DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY. THERE IS A CHANCE OF THUNDERSTORMS SATURDAY AFTERNOON AND EVENING. THESE STORMS MAY PRODUCE WIND GUSTS 35 KNOTS OR HIGHER AS WELL AS LARGE HAIL. AREAS OF DENSE FOG ARE EXPECTED TO PERSIST INTO SUNDAY. THERE IS A CHANCE OF THUNDERSTORMS TUESDAY NIGHT THROUGH THURSDAY. && 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, May 31, 1:33 PM CDT, 3 hours 47 minutes before
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</html>Local storm report, May 31, 1:39 PM CDT, 3 hours 41 minutes before
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</html>Local storm report, May 31, 2:00 PM CDT, 3 hours 20 minutes before
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</html>Local storm report, May 31, 2:44 PM CDT, 2 hours 36 minutes before
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</html>Local storm report, May 31, 3:01 PM CDT, 2 hours 19 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 |
|---|---|---|---|---|
| May 30, 7:43 PM CDT | Special Weather Statement | LOT | Lake, McHenry | 62 min |
| May 30, 7:49 PM CDT | Special Marine Warning | LOT | 116 min | |
| May 30, 9:19 PM CDT | Severe Thunderstorm Warning | LOT | Ford, Iroquois, Livingston | 56 min |
| May 30, 9:40 PM CDT | Severe Thunderstorm Warning | LOT | Ford, Iroquois | 65 min |
| May 30, 10:23 PM CDT | Severe Thunderstorm Warning | LOT | Iroquois, Kankakee, Will | 82 min |
| May 30, 10:26 PM CDT | Special Marine Warning | LOT | 2 hr | |
| May 31, 3:11 AM CDT | Small Craft Advisory | LOT | 19 hr | |
| May 31, 9:04 AM CDT | Marine Dense Fog Advisory | LOT | 36 hr | |
| May 31, 9:35 AM CDT | River Flood Advisory | LOT | Cook | 15 hr |
| May 31, 10:18 AM CDT | River Flood Watch | LOT | Iroquois | 13 hr |
| May 31, 10:18 AM CDT | River Flood Watch | LOT | Iroquois | 13 hr |
| May 31, 10:37 AM CDT | River Flood Advisory | LOT | Will | 12 hr |
| May 31, 10:37 AM CDT | River Flood Advisory | LOT | Grundy, Will | 12 hr |
| May 31, 10:37 AM CDT | River Flood Advisory | LOT | Grundy | 12 hr |
| May 31, 12:40 PM CDT | River Flood Watch | LOT | Grundy | 11 hr |
| May 31, 12:40 PM CDT | River Flood Watch | LOT | LaSalle | 11 hr |
| May 31, 5:04 PM CDT | Special Weather Statement | LOT | Ford | 56 min |
| May 31, 5:49 PM CDT | Areal Flood Advisory | LOT | Ford, Iroquois, Livingston | 6 hr |
| May 31, 5:51 PM CDT | Severe Thunderstorm Warning | LOT | Iroquois, Kankakee | 69 min |
| May 31, 6:58 PM CDT | Severe Thunderstorm Warning | LOT | Jasper | 17 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.