Alert archive / Illinois / Tornado Watches in 2019
Tornado Watch 231
The Storm Prediction Center issued this tornado watch at May 24, 2019, 12:36 PM CDT for 21 counties in Illinois. It was in force for 4 hr.
The area
The outline as issued.
The facts
- Issued
- May 24, 2019, 12:36 PM CDT (17:36 UTC)
- Expired
- May 24, 2019, 5:02 PM CDT
- In force
- 4 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 2 in
- Strongest gust expected
- 60 kt
All 21 counties
Cass County, IL, Champaign County, IL, DeWitt 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, Peoria County, IL, Piatt County, IL, Schuyler County, IL, Stark County, IL, Tazewell County, IL, Vermilion County, IL, Woodford County, IL
The radar
The Lincoln radar (KILX), 62 km from the middle of the area, began a volume at 17:40 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
- 50%
- One or more gusts of 65 knots or more
- 20%
- Ten or more severe hail reports
- 50%
- One or more hailstones of 2 inches or more
- 30%
- Six or more combined severe hail and wind reports
- 80%
Warnings issued inside it
4 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 24, 12:43 PM CDT | Tornado Warning | ILX | Fulton, Mason | 62 min |
| May 24, 1:25 PM CDT | Tornado Warning | ILX | Fulton, Mason, Tazewell | 35 min |
| May 24, 1:58 PM CDT | Tornado Warning | ILX | Mason, Tazewell | 47 min |
| May 24, 2:43 PM CDT | Severe Thunderstorm Warning | ILX | McLean, Tazewell | 47 min |
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, 5.6 hours before the alert went out and 88 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
- 83 J/kg
- Mixed-layer CIN
- -282 J/kg
- Mixed-layer LCL
- 943 m above ground
- 0-6 km bulk shear
- 41 kt
- 0-1 km storm-relative helicity
- 301 m²/s²
- 0-3 km storm-relative helicity
- 344 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.8
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 24, 12:15 PM CDT | Mesoscale Discussion | SPC | Adams, Brown, Cass, Champaign, Christian, Coles and 28 more | 90 min |
| May 24, 3:25 PM CDT | Mesoscale Discussion | SPC | Carroll, Henderson, Henry, Jo Daviess, Knox, Mercer and 5 more | 65 min |
| May 24, 6:23 PM CDT | Tornado Watch | SPC | Bureau, Carroll, Fulton, Grundy, Hancock, Henderson and 24 more | 4 hr |
Nearby
Tornado Watches in Illinois, 2019Every tornado watch in 2019
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.