Alert archive / Illinois / Severe Thunderstorm Watches in 2001
Severe Thunderstorm Watch 403
The Storm Prediction Center issued this severe thunderstorm watch at Jun 11, 2001, 10:30 PM CDT for 4 states. It was in force for 5 hr.
The area
The outline as issued.
The facts
- Issued
- Jun 11, 2001, 10:30 PM CDT (03:30 UTC)
- Expired
- Jun 12, 2001, 3:00 AM CDT
- In force
- 5 hr
- Issued by
- the Storm Prediction Center
All 57 counties
Boone County, IL, Bureau County, IL, Carroll County, IL, Cook County, IL, DeKalb County, IL, DuPage County, IL, Ford County, IL, Grundy County, IL, Iroquois County, IL, Kane County, IL, Kankakee County, IL, Kendall County, IL, Lake County, IL, LaSalle County, IL, Lee County, IL, Livingston County, IL, Marshall County, IL, McHenry County, IL, McLean County, IL, Ogle County, IL, Putnam County, IL, Stephenson County, IL, Tazewell County, IL, Whiteside County, IL, Will County, IL, Winnebago County, IL, Woodford County, IL, DeKalb County, IN, Elkhart County, IN, Fulton County, IN, Jasper County, IN, Kosciusko County, IN, LaGrange County, IN, Lake County, IN, LaPorte County, IN, Marshall County, IN, Newton County, IN, Noble County, IN, Porter County, IN, Pulaski County, IN, Saint Joseph County, IN, Starke County, IN, Steuben County, IN, Whitley County, IN, Allegan County, MI, Barry County, MI, Berrien County, MI, Branch County, MI, Cass County, MI, Kalamazoo County, MI, Kent County, MI, Ottawa County, MI, Saint Joseph County, MI, Van Buren County, MI, Kenosha County, WI, Racine County, WI, Walworth County, WI
The radar
The Chicago radar (KLOT), 39 km from the middle of the area, began a volume at 03:32 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.
Warnings issued inside it
28 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 11, 10:38 PM CDT | Severe Thunderstorm Warning | LOT | Boone, DeKalb, Ogle, Winnebago | 67 min |
| Jun 11, 10:38 PM CDT | Severe Thunderstorm Warning | LOT | Cook, Kane, McHenry | 67 min |
| Jun 11, 10:38 PM CDT | Severe Thunderstorm Warning | LOT | Lake | 67 min |
| Jun 11, 10:46 PM CDT | Severe Thunderstorm Warning | DVN | Stephenson | 59 min |
| Jun 11, 11:01 PM CDT | Severe Thunderstorm Warning | GRR | Ottawa | 59 min |
| Jun 11, 11:32 PM CDT | Severe Thunderstorm Warning | GRR | Kent, Newaygo | 73 min |
| Jun 11, 11:32 PM CDT | Severe Thunderstorm Warning | GRR | Allegan | 73 min |
| Jun 11, 11:43 PM CDT | Severe Thunderstorm Warning | LOT | Cook, DuPage, Kane, Lake, McHenry | 32 min |
| Jun 11, 11:43 PM CDT | Severe Thunderstorm Warning | LOT | Boone, DeKalb, Ogle, Winnebago | 32 min |
| Jun 11, 11:55 PM CDT | Severe Thunderstorm Warning | IWX | LaPorte, Saint Joseph | 55 min |
| Jun 11, 11:55 PM CDT | Severe Thunderstorm Warning | IWX | Cass | 55 min |
| Jun 11, 11:59 PM CDT | Severe Thunderstorm Warning | GRR | Ottawa | 31 min |
| Jun 12, 12:02 AM CDT | Severe Thunderstorm Warning | LOT | Cook, DuPage, Kane | 28 min |
| Jun 12, 12:09 AM CDT | Severe Thunderstorm Warning | GRR | Van Buren | 51 min |
| Jun 12, 12:28 AM CDT | Severe Thunderstorm Warning | LOT | Cook, DuPage, Kane, Kendall, Will | 32 min |
| Jun 12, 12:28 AM CDT | Severe Thunderstorm Warning | LOT | Porter | 32 min |
| Jun 12, 12:28 AM CDT | Severe Thunderstorm Warning | GRR | Barry, Kalamazoo | 47 min |
| Jun 12, 12:49 AM CDT | Severe Thunderstorm Warning | IWX | LaPorte, Saint Joseph | 81 min |
| Jun 12, 12:59 AM CDT | Severe Thunderstorm Warning | LOT | Cook, Will | 31 min |
| Jun 12, 12:59 AM CDT | Severe Thunderstorm Warning | LOT | Jasper, Porter | 31 min |
| Jun 12, 12:59 AM CDT | Severe Thunderstorm Warning | LOT | Newton | 31 min |
| Jun 12, 1:05 AM CDT | Severe Thunderstorm Warning | IWX | Marshall, Starke | 100 min |
| Jun 12, 1:05 AM CDT | Severe Thunderstorm Warning | IWX | Elkhart, Kosciusko | 100 min |
| Jun 12, 1:26 AM CDT | Severe Thunderstorm Warning | IWX | LaGrange | 94 min |
| Jun 12, 1:26 AM CDT | Severe Thunderstorm Warning | IWX | Fulton, Pulaski | 94 min |
| Jun 12, 1:26 AM CDT | Severe Thunderstorm Warning | IWX | Noble | 94 min |
| Jun 12, 1:48 AM CDT | Severe Thunderstorm Warning | IWX | Allen, Whitley | 72 min |
| Jun 12, 1:48 AM CDT | Severe Thunderstorm Warning | IWX | DeKalb, Steuben | 72 min |
The nearest sounding before it
Lincoln, IL (KILX), launched 00:00Z, 3.5 hours before the alert went out and 207 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
- 3690 J/kg
- Mixed-layer CIN
- -13 J/kg
- Mixed-layer LCL
- 1398 m above ground
- 0-6 km bulk shear
- 25 kt
- 0-1 km storm-relative helicity
- 32 m²/s²
- 0-3 km storm-relative helicity
- 65 m²/s²
- Significant tornado parameter
- 0.5
- Supercell composite
- 5.7
The text
The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 11, 7:00 PM CDT | Tornado Watch | SPC | Adams, Columbia, Crawford, Dane, Dodge, Fond du Lac and 17 more | 5 hr |
| Jun 11, 8:00 PM CDT | Severe Thunderstorm Watch | SPC | Trempealeau | 6 hr |
| Jun 11, 9:15 PM CDT | Severe Thunderstorm Watch | SPC | Brown, Calumet, Kewaunee, Manitowoc, Milwaukee, Ozaukee and 4 more | 3 hr |
Nearby
Severe Thunderstorm Watches in Illinois, 2001Severe Thunderstorm Watches in Indiana, 2001Severe Thunderstorm Watches in Michigan, 2001Every severe thunderstorm watch in 2001
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.