Alert archive / Illinois / Winter Storm Warnings in 2024
Winter Storm Warning 2, NWS Chicago, IL
NWS Chicago, IL issued this winter storm warning at Jan 11, 2024, 2:22 PM CST for 14 counties in Illinois. It took effect at Jan 12, 2024, 3:00 AM CST. It was in force for 24 hr. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Jan 11, 2024, 2:22 PM CST (20:22 UTC)
- In effect from
- Jan 12, 2024, 3:00 AM CST
- Expired
- Jan 13, 2024, 3:29 AM CST
- In force
- 24 hr
- Issued by
- NWS Chicago, IL
Counties Boone County, IL, Cook County, IL, DeKalb County, IL, DuPage County, IL, Grundy County, IL, Kane County, IL, Kendall County, IL, Lake County, IL, LaSalle County, IL, Lee County, IL, McHenry County, IL, Ogle County, IL, Will County, IL, Winnebago County, IL
The radar
The Chicago radar (KLOT), 49 km from the middle of the area, began a volume at 20:26 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
Davenport, (KDVN), launched 12:00Z, 8.4 hours before the alert went out and 165 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 685 m above ground
- 0-6 km bulk shear
- 34 kt
- 0-1 km storm-relative helicity
- -17 m²/s²
- 0-3 km storm-relative helicity
- -5 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
What forecasters said that day
The local office's own words before this winter storm 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 winter storm warning went out at Jan 11, 1:29 PM CST, 53 minutes earlier.
Area forecast discussion, Jan 11, 1:29 PM CST, 53 minutes before
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</html>Hazardous weather outlook, Jan 11, 3:48 AM CST, 10 hours 34 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 |
|---|---|---|---|---|
| Jan 11, 2:22 PM CST | Winter Weather Advisory | LOT | Cook, Ford, Grundy, Iroquois, Kankakee, Kendall and 3 more | 46 hr |
| Jan 11, 3:17 PM CST | Gale Warning | LOT | 24 hr |
Nearby
Winter Storm Warnings in Illinois, 2024Every winter storm warning in 2024
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.