Alert archive / Illinois / Severe Thunderstorm Warnings in 2011
Severe Thunderstorm Warning 140, NWS Chicago, IL
NWS Chicago, IL issued this severe thunderstorm warning at Aug 2, 2011, 8:39 PM CDT for 7 counties in Illinois. It was in force for 66 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
- Aug 2, 2011, 8:39 PM CDT (01:39 UTC)
- Expired
- Aug 2, 2011, 9:45 PM CDT
- In force
- 66 min
- Issued by
- NWS Chicago, IL
- Area
- Storm-based polygon
- Hail
- 0.5 in
- Wind
- 60.0 mph
Counties Boone County, IL, Cook County, IL, DeKalb County, IL, DuPage County, IL, Kane County, IL, Lake County, IL, McHenry County, IL
The radar
The Chicago radar (KLOT), 56 km from the middle of the area, began a volume at 01:40 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.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Aug 2, 5:22 PM CDT | Severe Thunderstorm Watch | SPC | 9 hr |
The office that day
Everything else NWS Chicago, IL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 2, 7:59 PM CDT | Severe Thunderstorm Warning | LOT | DeKalb, Lee, Ogle, Winnebago | 61 min |
| Aug 2, 8:45 PM CDT | Tornado Warning | LOT | DeKalb, Lee, Ogle | 34 min |
| Aug 2, 8:54 PM CDT | Special Marine Warning | LOT | 2 hr | |
| Aug 2, 9:11 PM CDT | Severe Thunderstorm Warning | LOT | Cook, DuPage | 64 min |
| Aug 2, 9:18 PM CDT | Severe Thunderstorm Warning | LOT | Cook, DuPage, Kane, Kendall, Will | 72 min |
| Aug 2, 9:33 PM CDT | Severe Thunderstorm Warning | LOT | DeKalb, Grundy, Kendall, LaSalle, Lee | 57 min |
| Aug 2, 10:01 PM CDT | Severe Thunderstorm Warning | LOT | Grundy, Kankakee, Kendall, LaSalle, Will | 59 min |
| Aug 2, 10:03 PM CDT | Areal Flood Advisory | LOT | DeKalb, LaSalle, Lee | 4 hr |
| Aug 2, 10:07 PM CDT | Severe Thunderstorm Warning | LOT | Cook, Will | 68 min |
| Aug 2, 10:52 PM CDT | Severe Thunderstorm Warning | LOT | Iroquois, Kankakee, Will | 68 min |
| Aug 2, 11:15 PM CDT | Severe Thunderstorm Warning | LOT | Ford, Grundy, Iroquois, Kankakee, Livingston, Will | 41 min |
| Aug 3, 12:08 AM CDT | Severe Thunderstorm Warning | LOT | Iroquois | 52 min |
Nearby
Severe Thunderstorm Warnings in Illinois, 2011Every severe thunderstorm warning in 2011
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.