Alert archive / Illinois / Tornado Watches in 2013
Tornado Watch 118
The Storm Prediction Center issued this tornado watch at Apr 17, 2013, 3:33 PM CDT for 30 counties in Illinois; 22 counties in Indiana. It was in force for 8 hr.
The area
The outline as issued.
The facts
- Issued
- Apr 17, 2013, 3:33 PM CDT (20:33 UTC)
- Expired
- Apr 18, 2013, 12:00 AM CDT
- In force
- 8 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 2 in
- Strongest gust expected
- 60 kt
All 52 counties
Cass County, IL, Champaign County, IL, Christian County, IL, Coles County, IL, DeWitt County, IL, Douglas County, IL, Edgar County, IL, Ford County, IL, Fulton County, IL, Iroquois County, IL, Knox County, IL, Livingston County, IL, Logan County, IL, Macon County, IL, Marshall County, IL, Mason County, IL, McLean County, IL, Menard County, IL, Morgan County, IL, Moultrie County, IL, Peoria County, IL, Piatt County, IL, Sangamon County, IL, Schuyler County, IL, Scott County, IL, Shelby County, IL, Stark County, IL, Tazewell County, IL, Vermilion County, IL, Woodford County, IL, Benton County, IN, Boone County, IN, Carroll County, IN, Cass County, IN, Clinton County, IN, Fountain County, IN, Fulton County, IN, Howard County, IN, Jasper County, IN, Kosciusko County, IN, Marshall County, IN, Miami County, IN, Montgomery County, IN, Newton County, IN, Parke County, IN, Pulaski County, IN, Starke County, IN, Tippecanoe County, IN, Tipton County, IN, Vermillion County, IN, Warren County, IN, White County, IN
The radar
The Lincoln radar (KILX), 35 km from the middle of the area, began a volume at 20:34 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.
What SPC expected
The probabilities SPC published with the watch, for the watch area over its life.
- Two or more tornadoes
- 40%
- One or more EF2 to EF5 tornadoes
- 20%
- Ten or more severe wind reports
- 30%
- One or more gusts of 65 knots or more
- 10%
- Ten or more severe hail reports
- 30%
- One or more hailstones of 2 inches or more
- 30%
- Six or more combined severe hail and wind reports
- 80%
Warnings issued inside it
11 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 17, 4:19 PM CDT | Severe Thunderstorm Warning | ILX | Fulton, Peoria, Tazewell | 41 min |
| Apr 17, 6:21 PM CDT | Severe Thunderstorm Warning | IND | Hendricks, Montgomery, Parke, Putnam | 39 min |
| Apr 17, 6:38 PM CDT | Severe Thunderstorm Warning | ILX | Marshall, Woodford | 37 min |
| Apr 17, 6:48 PM CDT | Severe Thunderstorm Warning | LOT | LaSalle, Livingston | 57 min |
| Apr 17, 6:49 PM CDT | Severe Thunderstorm Warning | IND | Boone, Clinton, Montgomery, Tippecanoe | 41 min |
| Apr 17, 6:55 PM CDT | Severe Thunderstorm Warning | IND | Fountain, Montgomery, Parke, Tippecanoe, Vermillion, Warren | 35 min |
| Apr 17, 7:17 PM CDT | Flash Flood Warning | ILX | Peoria, Tazewell, Woodford | 15 hr |
| Apr 17, 7:23 PM CDT | Severe Thunderstorm Warning | ILX | Schuyler | 37 min |
| Apr 17, 7:44 PM CDT | Flash Flood Warning | LOT | Grundy, LaSalle, Livingston | 8 hr |
| Apr 17, 7:59 PM CDT | Tornado Warning | ILX | Cass, Fulton, Mason, Schuyler | 31 min |
| Apr 17, 8:31 PM CDT | Flash Flood Warning | ILX | Fulton, Knox, Marshall, Peoria, Schuyler, Stark and 1 more | 14 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, 8.6 hours before the alert went out and 57 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
- 540 m above ground
- 0-6 km bulk shear
- 45 kt
- 0-1 km storm-relative helicity
- 186 m²/s²
- 0-3 km storm-relative helicity
- 299 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 6.8
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 16, 8:02 PM CDT | Mesoscale Discussion | SPC | Edwards, Gallatin, Hamilton, Hardin, Saline, Wabash and 1 more | 88 min |
| Apr 16, 8:44 PM CDT | Mesoscale Discussion | SPC | Bond, Calhoun, Champaign, Christian, Clark, Clay and 35 more | 2 hr |
| Apr 17, 8:49 AM CDT | Mesoscale Discussion | SPC | Adams, Brown, Bureau, Cass, DeWitt, Ford and 32 more | 56 min |
| Apr 17, 9:14 AM CDT | Severe Thunderstorm Watch | SPC | Boone, Bureau, Carroll, Cook, DeKalb, DuPage and 30 more | 10 hr |
| Apr 17, 9:30 AM CDT | Mesoscale Discussion | SPC | Hardin | 2 hr |
| Apr 17, 11:11 AM CDT | Tornado Watch | SPC | Adams, Brown, Calhoun, Greene, Jersey, Macoupin and 1 more | 11 hr |
| Apr 17, 12:39 PM CDT | Severe Thunderstorm Watch | SPC | Hardin, Pope | 5 hr |
| Apr 17, 1:33 PM CDT | Mesoscale Discussion | SPC | Boone, Bureau, Carroll, Cook, DeKalb, DuPage and 30 more | 57 min |
| Apr 17, 3:04 PM CDT | Mesoscale Discussion | SPC | Cass, Champaign, Christian, Clark, Coles, Cumberland and 26 more | 56 min |
| Apr 17, 3:38 PM CDT | Mesoscale Discussion | SPC | Adams, Brown, Calhoun, Greene, Jersey, Macoupin and 1 more | 97 min |
| Apr 17, 3:53 PM CDT | Mesoscale Discussion | SPC | Hardin, Pope | 67 min |
| Apr 17, 6:02 PM CDT | Mesoscale Discussion | SPC | Calhoun, Greene, Jersey, Pike | 88 min |
| Apr 17, 6:46 PM CDT | Mesoscale Discussion | SPC | Cass, Champaign, Christian, Coles, DeWitt, Douglas and 18 more | 89 min |
| Apr 17, 4:39 PM CDT | Mesoscale Discussion | SPC | Bartholomew, Brown, Clay, Daviess, Dubois, Greene and 12 more | 96 min |
| Apr 17, 9:50 AM CDT | Mesoscale Discussion | SPC | Barton, Bates, Benton, Boone, Buchanan, Caldwell and 34 more | 55 min |
| Apr 17, 4:19 PM CDT | Mesoscale Discussion | SPC | Scotland | 26 min |
Nearby
Tornado Watches in Illinois, 2013Tornado Watches in Indiana, 2013Every tornado watch in 2013
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.