Alert archive / Illinois / Severe Thunderstorm Watches in 2005
Severe Thunderstorm Watch 4
The Storm Prediction Center issued this severe thunderstorm watch at Jan 12, 2005, 4:55 PM CST for 32 counties in Illinois. It was in force for 5 hr.
The area
The outline as issued.
The facts
- Issued
- Jan 12, 2005, 4:55 PM CST (22:55 UTC)
- Expired
- Jan 12, 2005, 10:00 PM CST
- In force
- 5 hr
- Issued by
- the Storm Prediction Center
All 32 counties
Adams County, IL, Brown County, IL, Bureau County, IL, Cass County, IL, Cook County, IL, DeKalb County, IL, DuPage County, IL, Fulton County, IL, Grundy County, IL, Kane County, IL, Kendall County, IL, Knox County, IL, LaSalle County, IL, Lee County, IL, Livingston County, IL, Logan County, IL, Marshall County, IL, Mason County, IL, McDonough County, IL, McLean County, IL, Menard County, IL, Morgan County, IL, Peoria County, IL, Pike County, IL, Putnam County, IL, Sangamon County, IL, Schuyler County, IL, Scott County, IL, Stark County, IL, Tazewell County, IL, Will County, IL, Woodford County, IL
The radar
The Lincoln radar (KILX), 66 km from the middle of the area, began a volume at 22:54 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
10 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jan 12, 5:26 PM CST | Severe Thunderstorm Warning | ILX | Schuyler | 64 min |
| Jan 12, 5:57 PM CST | Severe Thunderstorm Warning | ILX | Fulton | 48 min |
| Jan 12, 6:43 PM CST | Severe Thunderstorm Warning | ILX | Peoria | 47 min |
| Jan 12, 7:06 PM CST | Severe Thunderstorm Warning | LSX | Pike | 54 min |
| Jan 12, 7:10 PM CST | Flash Flood Warning | ILX | Fulton, Knox, Peoria, Schuyler, Stark | 12 hr |
| Jan 12, 7:39 PM CST | Tornado Warning | LSX | Calhoun, Pike | 36 min |
| Jan 12, 7:45 PM CST | Severe Thunderstorm Warning | LOT | DuPage, Grundy, Kane, Kendall, Will | 45 min |
| Jan 12, 7:58 PM CST | Severe Thunderstorm Warning | ILX | Scott | 32 min |
| Jan 12, 8:15 PM CST | Flash Flood Warning | ILX | Cass, Marshall, Mason, Morgan, Scott, Tazewell and 1 more | 12 hr |
| Jan 12, 9:02 PM CST | Flash Flood Warning | ILX | DeWitt, Logan, McLean, Menard, Sangamon | 12 hr |
Discussions around it
SPC mesoscale discussions over the same counties from four hours before the watch to its end.
The nearest sounding before it
Lincoln, IL (KILX), launched 12:00Z, 10.9 hours before the alert went out and 116 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
- 182 J/kg
- Mixed-layer CIN
- -79 J/kg
- Mixed-layer LCL
- 606 m above ground
- 0-6 km bulk shear
- 52 kt
- 0-1 km storm-relative helicity
- 320 m²/s²
- 0-3 km storm-relative helicity
- 356 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.3
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jan 12, 3:35 PM CST | Severe Thunderstorm Watch | SPC | Calhoun | 6 hr |
| Jan 12, 4:25 PM CST | Mesoscale Discussion | SPC | Adams, Brown, Bureau, Cass, Cook, DeKalb and 29 more | 2 hr |
Nearby
Severe Thunderstorm Watches in Illinois, 2005Every severe thunderstorm watch in 2005
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.