Alert archive / Illinois / Severe Thunderstorm Warnings in 2022
Severe Thunderstorm Warning 85, NWS Chicago, IL
NWS Chicago, IL issued this severe thunderstorm warning at Jul 24, 2022, 2:44 AM CDT for Boone County, McHenry County, Winnebago County, Illinois. It was in force for 61 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
- Jul 24, 2022, 2:44 AM CDT (07:44 UTC)
- Expired
- Jul 24, 2022, 3:45 AM CDT
- In force
- 61 min
- Issued by
- NWS Chicago, IL
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties Boone County, IL, McHenry County, IL, Winnebago County, IL
The radar
The Milwaukee radar (KMKX), 74 km from the middle of the area, began a volume at 07:48 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 |
|---|---|---|---|
| Jul 24, 12:41 AM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
The nearest sounding before it
Davenport, (KDVN), launched 00:00Z, 7.7 hours before the alert went out and 160 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
- 3986 J/kg
- Mixed-layer CIN
- -12 J/kg
- Mixed-layer LCL
- 1390 m above ground
- 0-6 km bulk shear
- 36 kt
- 0-1 km storm-relative helicity
- 123 m²/s²
- 0-3 km storm-relative helicity
- 229 m²/s²
- Significant tornado parameter
- 3.4
- Supercell composite
- 26.8
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 Jul 23, 6:38 PM CDT, 8 hours 6 minutes earlier.
Area forecast discussion, Jul 23, 6:38 PM CDT, 8 hours 6 minutes before
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</html>The office that day
Everything else NWS Chicago, IL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 23, 8:00 PM CDT | Special Marine Warning | LOT | 90 min | |
| Jul 24, 2:10 AM CDT | Special Weather Statement | LOT | Winnebago | 20 min |
| Jul 24, 2:32 AM CDT | Special Weather Statement | LOT | Winnebago | 43 min |
| Jul 24, 2:49 AM CDT | Special Marine Warning | LOT | 3 hr | |
| Jul 24, 3:10 AM CDT | Severe Thunderstorm Warning | LOT | Lake, McHenry | 34 min |
| Jul 24, 4:24 AM CDT | Special Weather Statement | LOT | Ogle | 36 min |
| Jul 24, 4:47 AM CDT | Special Weather Statement | LOT | DeKalb, Kane | 28 min |
| Jul 24, 7:41 AM CDT | Special Marine Warning | LOT | 2 hr | |
| Jul 24, 8:42 AM CDT | Areal Flood Advisory | LOT | Cook, Will | 2 hr |
| Jul 24, 10:39 AM CDT | Small Craft Advisory | LOT | 4 hr |
Nearby
Severe Thunderstorm Warnings in Illinois, 2022Every severe thunderstorm warning in 2022
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.