Alert archive / Illinois / Severe Thunderstorm Warnings in 2007
Severe Thunderstorm Warning 45, NWS Chicago, IL
NWS Chicago, IL issued this severe thunderstorm warning at Jun 1, 2007, 6:59 PM CDT for DuPage County, Illinois. It was in force for 46 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 1, 2007, 6:59 PM CDT (23:59 UTC)
- Expired
- Jun 1, 2007, 7:45 PM CDT
- In force
- 46 min
- Issued by
- NWS Chicago, IL
- Area
- Counties, with a storm outline in the text
County DuPage County, IL
The radar
The Chicago radar (KLOT), 28 km from the middle of the area, began a volume at 00:02 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, 12.0 hours before the alert went out and 194 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
- 532 J/kg
- Mixed-layer CIN
- -40 J/kg
- Mixed-layer LCL
- 717 m above ground
- 0-6 km bulk shear
- 20 kt
- 0-1 km storm-relative helicity
- 51 m²/s²
- 0-3 km storm-relative helicity
- 59 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 1, 6:50 PM CDT, 9 minutes earlier.
Area forecast discussion, Jun 1, 6:50 PM CDT, 9 minutes before
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</html>Hazardous weather outlook, Jun 1, 3:20 PM CDT, 3 hours 39 minutes before
HAZARDOUS WEATHER OUTLOOK...UPDATED NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL 320 PM CDT FRI JUN 1 2007 ILZ003>006-008-010>014-019>022-023-032-033-039-INZ001-002-010-011- 019-012130- 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- 320 PM CDT FRI JUN 1 2007 THIS PORTION OF THE HAZARDOUS WEATHER OUTLOOK IS FOR NORTH CENTRAL AND NORTHEAST ILLINOIS...AND NORTHWEST INDIANA. .DAY ONE...THIS AFTERNOON AND TONIGHT A TORNADO WATCH IS EFFECT UNTIL 700PM FOR PORTIONS OF NORTH CENTRAL AND NORTHEAST ILLINOIS...GENERALLY WEST OF THE FOX AND ILLINOIS RIVERS. STRONG TO SEVERE THUNDERSTORMS WILL SPREAD EASTWARD INTO NORTH CENTRAL ILLINOIS THIS AFTERNOON...AND POSSIBLY CONTINUE EASTWARD INTO NORTHEAST ILLINOIS BY THIS EVENING. IN ADDITION HAIL UP TO THE SIZE OF GOLF BALLS AND DAMAGING WINDS IN EXCESS OF 60 MPH...THE POTENTIAL EXISTS FOR AN ISOLATED TORNADO OR TWO. THUNDERSTORM COVERAGE IS FORECAST TO INCREASE TONIGHT...WITH THE POTENTIAL FOR LOCALLY HEAVY RAINFALL. .DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY THERE WILL BE A CONTINUED CHANCE OF THUNDERSTORMS THROUGH MONDAY...MAINLY DURING THE AFTERNOON AND EVENING HOURS. THE PROBABILITY OF WIDESPREAD HAZARDOUS WEATHER WILL REMAIN LOW. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS REQUESTED THIS AFTERNOON OVER NORTH CENTRAL ILLINOIS AND MAY BE NEEDED ACROSS NORTHEAST ILLINOIS BY EARLY EVENING. && COMPLETE FORECAST INFORMATION IS AVAILABLE ON THE NWS CHICAGO WEBPAGE: WEATHER.GOV/CHICAGO (LOWER CASE) LMZ740>745-766-012130- WINTHROP HARBOR IL TO MICHIGAN CITY IN- LAKE MICHIGAN- 320 PM CDT FRI JUN 1 2007 THIS PORTION OF THE HAZARDOUS WEATHER OUTLOOK IS FOR THE ILLINOIS AND INDIANA WATERS OF LAKE MICHIGAN. .DAY ONE... THIS AFTERNOON AND TONIGHT THERE IS A CHANCE OF THUNDERSTORMS ACROSS SOUTHERN LAKE MICHIGAN BY LATE THIS AFTERNOON. THUNDERSTORM COVERAGE IS EXPECTED TO INCREASE TONIGHT. .DAYS TWO THROUGH SEVEN... SATURDAY THROUGH THURSDAY THERE WILL BE A CONTINUED CHANCE OF THUNDERSTORMS THROUGH MONDAY...MAINLY DURING THE AFTERNOON AND EVENING HOURS. THE PROBABILITY OF WIDESPREAD HAZARDOUS WEATHER WILL REMAIN LOW. && COMPLETE FORECAST INFORMATION IS AVAILABLE ON THE NWS CHICAGO WEBPAGE: WEATHER.GOV/CHICAGO (LOWER CASE) KML/IZZI
In the hours before
Local storm report, Jun 1, 4:23 PM CDT, 2 hours 36 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
423 PM CDT FRI JUN 01 2007
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0337 PM TSTM WND DMG 6 SW FORRESTON 42.06N 89.66W
06/01/2007 OGLE IL LAW ENFORCEMENT
WIRES DOWN IN BROOKVILLE
&&
HALBACHThe office that day
Everything else NWS Chicago, IL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 1, 3:59 AM CDT | Dense Fog Advisory | LOT | Boone, DeKalb, Kane, Lake, Lee, McHenry and 2 more | 6 hr |
| Jun 1, 3:26 PM CDT | Severe Thunderstorm Warning | LOT | Ogle | 79 min |
| Jun 1, 3:37 PM CDT | Severe Thunderstorm Warning | LOT | Lee | 68 min |
| Jun 1, 4:02 PM CDT | Severe Thunderstorm Warning | LOT | Winnebago | 73 min |
| Jun 1, 4:38 PM CDT | Severe Thunderstorm Warning | LOT | Ogle | 67 min |
| Jun 1, 4:49 PM CDT | Severe Thunderstorm Warning | LOT | Lee | 43 min |
| Jun 1, 5:12 PM CDT | Severe Thunderstorm Warning | LOT | Winnebago | 34 min |
| Jun 1, 6:01 PM CDT | Severe Thunderstorm Warning | LOT | LaSalle | 44 min |
| Jun 1, 6:19 PM CDT | Severe Thunderstorm Warning | LOT | DeKalb | 29 min |
| Jun 1, 6:35 PM CDT | Severe Thunderstorm Warning | LOT | Kendall | 46 min |
| Jun 1, 6:48 PM CDT | Severe Thunderstorm Warning | LOT | Kane | 31 min |
Nearby
Severe Thunderstorm Warnings in Illinois, 2007Every severe thunderstorm warning in 2007
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.