Alert archive / Illinois / Severe Thunderstorm Warnings in 2004

Severe Thunderstorm Warning 11, NWS Chicago, IL

May 7, 2004Grundy County, Illinois

NWS Chicago, IL issued this severe thunderstorm warning at May 7, 2004, 6:12 AM CDT for Grundy County, Illinois. It was in force for 48 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 7, 2004, 6:12 AM CDT (11:12 UTC)
Expired
May 7, 2004, 7:00 AM CDT
In force
48 min
Issued by
NWS Chicago, IL
Area
Counties, with a storm outline in the text

County Grundy County, IL

The radar

The Chicago radar (KLOT), 45 km from the middle of the area, began a volume at 11:13 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.

IssuedProductOfficeLasted
May 7, 5:00 AM CDTSevere Thunderstorm WatchSPC4 hr

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 6, 6:32 PM CDT, 11 hours 40 minutes earlier.

Area forecast discussion, May 6, 6:32 PM CDT, 11 hours 40 minutes before
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Hazardous weather outlook, May 6, 5:00 PM CDT, 13 hours 12 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE CHICAGO IL
500 PM CDT THU MAY 6 2004

ILZ003>006-008-010>014-019>022-023-032-033-039-INZ001-002-010-011-019
-071100-
WINNEBAGO-BOONE-MCHENRY-LAKE IL-OGLE-LEE-DE KALB-KANE-DU PAGE-COOK-
LA SALLE-KENDALL-GRUNDY-WILL-KANKAKEE-LIVINGSTON-IROQUOIS-FORD-
LAKE IN-PORTER-NEWTON-JASPER-BENTON-
500 PM CDT THU MAY 6 2004

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

.DAY ONE...TONIGHT

THERE WILL BE ISOLATED THUNDERSTORMS THIS EVENING...WITH A SLIGHT
RISK OF THEM PRODUCING SEVERE WEATHER. IF STRONG STORMS
DEVELOP...THE PRIMARY THREAT WOULD BE LARGE HAIL AND DAMAGING WINDS.
THERE IS A CHANCE OF MORE THUNDERSTORMS OVERNIGHT.

.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY

THERE IS A CHANCE OF THUNDERSTORMS THROUGH THE PERIOD. THERE IS A
SLIGHT CHANCE OF SEVERE WEATHER FRIDAY AND SATURDAY.

THE POTENTIAL FOR SIGNIFICANT RAINFALL ACCUMULATIONS EXISTS FOR
THE FRIDAY THROUGH WEDNESDAY PERIOD.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE NECESSARY THIS EVENING...LATER
FRIDAY...AND POSSIBLY AGAIN ON SATURDAY.

&&

NWS CHICAGO WEBPAGE: WWW.CRH.NOAA.GOV/LOT (LOWER CASE)

LMZ740>746-766-071100-
WINTHROP HARBOR IL TO NEW BUFFALO MI-
LAKE MICHIGAN-
500 PM CDT THU MAY 6 2004

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

.DAY ONE...TONIGHT

THERE WILL BE ISOLATED THUNDERSTORMS THIS EVENING...WITH A SLIGHT
RISK OF THEM PRODUCING SEVERE WEATHER. IF STRONG STORMS
DEVELOP...THE PRIMARY THREAT WOULD BE LARGE HAIL AND DAMAGING WINDS.
THERE IS A CHANCE OF MORE THUNDERSTORMS OVERNIGHT.

A SMALL CRAFT ADVISORY IS IN EFFECT FOR HAZARDOUS WINDS AND WAVES.

.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY

THERE IS A CHANCE OF THUNDERSTORMS THROUGH THE PERIOD. THERE IS A
SLIGHT CHANCE OF SEVERE WEATHER FRIDAY AND SATURDAY.

HAZARDOUS WINDS AND WAVES FOR SMALL CRAFT ARE EXPECTED FRIDAY.

&&

NWS CHICAGO WEBPAGE: WWW.CRH.NOAA.GOV/LOT (LOWER CASE)

The office that day

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

IssuedProductOfficeCountiesLasted
May 7, 5:43 AM CDTSevere Thunderstorm WarningLOTLaSalle32 min
May 7, 6:17 AM CDTSevere Thunderstorm WarningLOTLivingston43 min
May 7, 1:36 PM CDTSevere Thunderstorm WarningLOTKendall39 min
May 7, 3:05 PM CDTSevere Thunderstorm WarningLOTWill40 min
May 7, 7:56 AM CDTSevere Thunderstorm WarningLOTBenton, Jasper, Newton49 min
May 7, 3:33 PM CDTSevere Thunderstorm WarningLOTLake27 min

Nearby

Severe Thunderstorm Warnings in Illinois, 2004Every severe thunderstorm warning in 2004

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.