Alert archive / Illinois / Severe Thunderstorm Warnings in 2015

Severe Thunderstorm Warning 41, NWS Chicago, IL

June 8, 20154 counties in Illinois

NWS Chicago, IL issued this severe thunderstorm warning at Jun 8, 2015, 3:27 PM CDT for 4 counties in Illinois. It was in force for 50 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 8, 2015, 3:27 PM CDT (20:27 UTC)
Expired
Jun 8, 2015, 4:17 PM CDT
In force
50 min
Issued by
NWS Chicago, IL
Area
Storm-based polygon
Hail
1.0 in
Wind
60.0 mph

Counties DeKalb County, IL, Kane County, IL, Kendall County, IL, Lee County, IL

The radar

The Chicago radar (KLOT), 58 km from the middle of the area, began a volume at 20:30 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.

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, 6:52 PM CDT, 20 hours 35 minutes earlier.

Area forecast discussion, Jun 7, 6:52 PM CDT, 20 hours 35 minutes before
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Hazardous weather outlook, Jun 7, 4:00 PM CDT, 23 hours 27 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
400 PM CDT SUN JUN 7 2015

ILZ003>006-008-010>014-019>023-032-033-039-INZ001-002-010-011-019-
082100-
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-
400 PM CDT SUN JUN 7 2015

THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTH CENTRAL ILLINOIS...
NORTHEAST ILLINOIS AND NORTHWEST INDIANA.

.DAY ONE...TONIGHT.

  WEATHER HAZARDS EXPECTED:

  THUNDERSTORMS...THE STRONGEST MAY PRODUCE:
	HAIL UP TO THE SIZE OF QUARTERS.
	WIND GUSTS UP TO 70 MPH.
	AND VERY HEAVY RAIN AND LOCALIZED FLASH FLOODING.

  AREAS AFFECTED AND TIMING:

  THUNDERSTORMS ARE LIKELY THROUGH THIS EVENING...ESPECIALLY NEAR
  AND SOUTH OF INTERSTATE 80 WHERE THE GREATEST THREAT OF SEVERE
  THUNDERSTORMS WILL BE. THERE IS A THREAT FOR ISOLATED SEVERE
  THUNDERSTORMS IN PORTIONS OF NORTH CENTRAL AND NORTHWEST
  ILLINOIS AS WELL.

  DISCUSSION:

ISOLATED THUNDERSTORMS ARE POSSIBLE ALONG AND NORTH OF INTERSTATE
80...WITH AN ATTEND THREAT FOR A FEW STRONG TO SEVERE STORMS.
MORE NUMEROUS THUNDERSTORMS WILL CONTINUE INTO THE EVENING HOURS
NEAR AND SOUTH OF INTERSTATE 80...WHERE A FEW WILL LIKELY BECOME
SEVERE WITH LARGE HAIL AND DAMAGING WINDS THE PRIMARY THREAT. IN
ADDITION...A VERY MOIST AIR MASS IS IN PLACE AND COULD ALLOW FOR
THUNDERSTORMS TO PRODUCE TORRENTIAL RAINFALL AND POSSIBLY SOME
LOCALIZED FLASH FLOODING.

.DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY.

SCATTERED THUNDERSTORMS ARE POSSIBLE ON MONDAY AFTERNOON...WITH
THE STRONGEST POSSIBLY PRODUCING STRONG WINDS AND HAIL.

PERIODIC THUNDERSTORMS ARE THEN POSSIBLE TUESDAY NIGHT THROUGH
SATURDAY.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION WILL LIKELY BE NEEDED THROUGH THIS EVENING.

&&

LMZ740>745-082100-
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-
400 PM CDT SUN JUN 7 2015

THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE ILLINOIS NEARSHORE
WATERS OF LAKE MICHIGAN AND THE INDIANA NEARSHORE WATERS OF LAKE
MICHIGAN.

.DAY ONE...TONIGHT.

SCATTERED THUNDERSTORMS ARE POSSIBLE THIS EVENING...SOME COULD
PRODUCE WIND GUSTS OVER 35 KT.

STRONG WINDS WILL LEAD TO HAZARDOUS CONDITIONS FOR SMALL CRAFT
THROUGH EARLY EVENING.

.DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY.

SCATTERED THUNDERSTORMS ARE POSSIBLE ON MONDAY AFTERNOON...WITH
THE STRONGEST POSSIBLY PRODUCING STRONG WINDS AND HAIL.

PERIODIC THUNDERSTORMS ARE THEN POSSIBLE TUESDAY NIGHT THROUGH
SATURDAY.

&&

LMZ080-261-362-364-366-563-565-567-669-671-673-675-777-779-868-
870-872-874-876-878-082100-
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-
400 PM CDT SUN JUN 7 2015

THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE OPEN WATERS OF LAKE
MICHIGAN.

.DAY ONE...TONIGHT.

SCATTERED THUNDERSTORMS ARE LIKELY THROUGH EARLY EVENING...MAINLY
SOUTHERN PORTIONS OF THE LAKE.

.DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY.

SCATTERED THUNDERSTORMS ARE POSSIBLE ON MONDAY AFTERNOON...WITH
THE STRONGEST POSSIBLY PRODUCING STRONG WINDS AND HAIL.

PERIODIC THUNDERSTORMS ARE THEN POSSIBLE TUESDAY NIGHT THROUGH
SATURDAY.

&&

IZZI/RC

VISIT US AT HTTP://WEATHER.GOV/CHICAGO (ALL LOWERCASE)

FOLLOW US ON FACEBOOK...TWITTER...AND YOUTUBE AT:
WWW.FACEBOOK.COM/NWSCHICAGO
WWW.TWITTER.COM/NWSCHICAGO
WWW.YOUTUBE.COM/NWSCHICAGO

The office that day

Everything else NWS Chicago, IL issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jun 7, 8:31 PM CDTAreal Flood AdvisoryLOTGrundy, LaSalle, Livingston4 hr
Jun 7, 8:33 PM CDTSpecial Weather StatementLOTFord, Grundy, Iroquois, Kankakee, Livingston72 min
Jun 7, 9:14 PM CDTRiver Flood WarningLOTIroquois67 hr
Jun 7, 9:25 PM CDTRiver Flood AdvisoryLOTIroquois4 days
Jun 7, 10:14 PM CDTFlash Flood WarningLOTIroquois, Kankakee5 hr
Jun 7, 11:10 PM CDTAreal Flood AdvisoryLOTFord, Grundy, Iroquois, Kankakee, LaSalle, Livingston and 1 more11 hr
Jun 8, 3:05 AM CDTSmall Craft AdvisoryLOT16 hr
Jun 8, 7:49 AM CDTRiver Flood WarningLOTIroquois27 days
Jun 8, 8:18 AM CDTRiver Flood AdvisoryLOTKankakee36 hr
Jun 8, 8:29 AM CDTMarine Dense Fog AdvisoryLOT44 hr
Jun 8, 12:00 PM CDTRiver Flood WarningLOTBureau, LaSalle, Putnam34 hr
Jun 8, 1:53 PM CDTSpecial Marine WarningLOT112 min
Jun 8, 2:18 PM CDTSevere Thunderstorm WarningLOTLake27 min
Jun 8, 2:38 PM CDTSevere Thunderstorm WarningLOTLake37 min
Jun 8, 2:45 PM CDTRiver Flood WarningLOTKankakee48 hr
Jun 8, 2:55 PM CDTRiver Flood AdvisoryLOTGrundy, Will52 hr
Jun 8, 2:55 PM CDTRiver Flood AdvisoryLOTGrundy16 hr
Jun 8, 3:16 PM CDTSevere Thunderstorm WarningLOTCook, Kane, Lake, McHenry44 min
Jun 8, 3:28 PM CDTSpecial Marine WarningLOT92 min
Jun 8, 3:36 PM CDTSpecial Marine WarningLOT84 min
Jun 8, 4:00 PM CDTSevere Thunderstorm WarningLOTCook, DuPage30 min
Jun 8, 4:33 PM CDTSevere Thunderstorm WarningLOTKane, Kendall42 min
Jun 8, 4:57 PM CDTSpecial Marine WarningLOT93 min
Jun 8, 5:31 PM CDTSpecial Marine WarningLOT59 min
Jun 8, 6:07 PM CDTSevere Thunderstorm WarningLOTFord, Iroquois, Livingston53 min
Jun 8, 6:38 PM CDTSevere Thunderstorm WarningLOTIroquois37 min
Jun 7, 9:14 PM CDTRiver Flood WarningLOTLake, Newton51 days
Jun 7, 9:25 PM CDTRiver Flood AdvisoryLOTJasper60 hr
Jun 7, 9:25 PM CDTRiver Flood AdvisoryLOTNewton4 days
Jun 8, 4:21 AM CDTRiver Flood WarningLOTJasper22 days
Jun 8, 7:49 AM CDTRiver Flood WarningLOTNewton26 days
Jun 8, 9:01 AM CDTRiver Flood WarningLOTJasper, Porter3 days
Jun 8, 3:56 PM CDTSevere Thunderstorm WarningLOTPorter49 min
Jun 8, 4:03 PM CDTSevere Thunderstorm WarningLOTLake14 min
Jun 8, 4:20 PM CDTSevere Thunderstorm WarningLOTLake40 min
Jun 8, 4:55 PM CDTAreal Flood AdvisoryLOTLake, Porter4 hr
Jun 8, 4:55 PM CDTSevere Thunderstorm WarningLOTLake, Porter56 min
Jun 8, 5:17 PM CDTFlash Flood WarningLOTLake, Porter6 hr
Jun 8, 6:02 PM CDTSevere Thunderstorm WarningLOTJasper, Lake, Newton, Porter43 min
Jun 8, 6:44 PM CDTSevere Thunderstorm WarningLOTJasper32 min
Jun 8, 6:53 PM CDTSevere Thunderstorm WarningLOTBenton, Newton37 min

Nearby

Severe Thunderstorm Warnings in Illinois, 2015Every severe thunderstorm warning in 2015

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; radar from the NEXRAD Level II archive.