Alert archive / Illinois / Blizzard Warnings in 2009
Blizzard Warning 1, NWS Chicago, IL
NWS Chicago, IL issued this blizzard warning at Jan 12, 2009, 11:49 AM CST for 12 counties in Illinois; Lake County, Porter County, Indiana. It took effect at Jan 13, 2009, 12:00 AM CST. It was in force for 4 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 12, 2009, 11:49 AM CST (17:49 UTC)
- In effect from
- Jan 13, 2009, 12:00 AM CST
- Expired
- Jan 13, 2009, 3:53 AM CST
- In force
- 4 hr
- Issued by
- NWS Chicago, IL
Counties Boone 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, Winnebago County, IL, Lake County, IN, Porter County, IN
The radar
The Chicago radar (KLOT), 42 km from the middle of the area, began a volume at 17:53 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, 5.8 hours before the alert went out and 172 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
- 1 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 484 m above ground
- 0-6 km bulk shear
- 0 kt
- 0-1 km storm-relative helicity
- 0 m²/s²
- 0-3 km storm-relative helicity
- 0 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The office that day
Everything else NWS Chicago, IL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jan 12, 4:21 AM CST | Blizzard Watch | LOT | Boone, DeKalb, DuPage, Grundy, Kane, Kendall and 6 more | 7 hr |
| Jan 12, 4:21 AM CST | Winter Weather Advisory | LOT | Boone, DeKalb, DuPage, Ford, Grundy, Iroquois and 10 more | 28 hr |
| Jan 12, 4:33 AM CST | Gale Warning | LOT | 34 hr | |
| Jan 12, 4:33 AM CST | Heavy Freezing Spray Warning | LOT | 34 hr | |
| Jan 12, 3:40 PM CST | Blizzard Watch | LOT | Boone, DeKalb, DuPage, Ford, Grundy, Iroquois and 10 more | 19 hr |
Nearby
Blizzard Warnings in Illinois, 2009Blizzard Warnings in Indiana, 2009Every blizzard warning in 2009
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.