Alert archive / Illinois / Severe Thunderstorm Warnings in 2023
Severe Thunderstorm Warning 240, NWS Lincoln, IL
NWS Lincoln, IL issued this severe thunderstorm warning at Aug 25, 2023, 6:34 PM CDT for 4 counties in Illinois. It was in force for 41 min. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Aug 25, 2023, 6:34 PM CDT (23:34 UTC)
- Expired
- Aug 25, 2023, 7:15 PM CDT
- In force
- 41 min
- Issued by
- NWS Lincoln, IL
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Cass County, IL, Fulton County, IL, Mason County, IL, Schuyler County, IL
The radar
The Lincoln radar (KILX), 78 km from the middle of the area, began a volume at 23:37 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
Lincoln, IL (KILX), launched 12:00Z, 11.6 hours before the alert went out and 140 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
- 3366 J/kg
- Mixed-layer CIN
- -113 J/kg
- Mixed-layer LCL
- 992 m above ground
- 0-6 km bulk shear
- 23 kt
- 0-1 km storm-relative helicity
- 50 m²/s²
- 0-3 km storm-relative helicity
- 72 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
What forecasters said that day
The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Lincoln, IL wrote its last area forecast discussion before this severe thunderstorm warning went out at Aug 25, 6:06 PM CDT, 28 minutes earlier.
Area forecast discussion, Aug 25, 6:06 PM CDT, 28 minutes before
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Hazardous Weather Outlook National Weather Service Lincoln IL 326 PM CDT Fri Aug 25 2023 ILZ028-030-262030- Stark-Marshall- 326 PM CDT Fri Aug 25 2023 This Hazardous Weather Outlook is for central Illinois. .DAY ONE...Tonight. Isolated to scattered thunderstorms are possible through this evening. There is a marginal risk (level 1 of 5) of severe storms with damaging winds and hail possible. .DAYS TWO THROUGH SEVEN...Saturday through Thursday. No hazardous weather is expected at this time. .SPOTTER INFORMATION STATEMENT... Spotter activation may be needed this evening. ILZ027-029-031-036>038-040>057-061>063-067-068-262030- Knox-Peoria-Woodford-Fulton-Tazewell-McLean-Schuyler-Mason-Logan- De Witt-Piatt-Champaign-Vermilion-Cass-Menard-Scott-Morgan-Sangamon- Christian-Macon-Moultrie-Douglas-Coles-Edgar-Shelby-Cumberland-Clark- Jasper-Crawford- 326 PM CDT Fri Aug 25 2023 This Hazardous Weather Outlook is for central Illinois, east central Illinois, southeast Illinois and west central Illinois. .DAY ONE...Tonight. Dangerous heat will continue into this evening with heat index readings of 110 to 115 degrees. Isolated to scattered thunderstorms are possible through this evening. There is a slight risk (level 2 of 5) of severe storms with damaging winds and hail possible. .DAYS TWO THROUGH SEVEN...Saturday through Thursday. Isolated thunderstorms are possible south of I-74 Saturday morning. These are not expected to be severe. .SPOTTER INFORMATION STATEMENT... Spotter activation may be needed this evening. ILZ066-071>073-262030- Effingham-Clay-Richland-Lawrence- 326 PM CDT Fri Aug 25 2023 This Hazardous Weather Outlook is for southeast Illinois. .DAY ONE...Tonight. Dangerous heat will continue into this evening with peak heat index readings of 110 to 120 degrees. Isolated thunderstorms are possible this evening and tonight over southeast IL. There is marginal risk (level 1 of 5) of severe storms this evening with damaging winds and hail possible. .DAYS TWO THROUGH SEVEN...Saturday through Thursday. Isolated thunderstorms are possible Saturday. These are not expected to be severe. .SPOTTER INFORMATION STATEMENT... Spotter activation may be needed this evening. Deubelbeiss
In the hours before
Special weather statement, Aug 25, 4:15 PM CDT, 2 hours 19 minutes before
Special Weather Statement
National Weather Service Lincoln IL
415 PM CDT Fri Aug 25 2023
ILZ066-252145-
Effingham-
415 PM CDT Fri Aug 25 2023
...A strong thunderstorm will impact portions of southern Effingham
County through 445 PM CDT...
At 414 PM CDT, Doppler radar was tracking a strong thunderstorm near
Altamont, or 14 miles southwest of Effingham, moving east at 35 mph.
HAZARD...Wind gusts up to 50 mph.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects.
This strong thunderstorm will be near...
Edgewood around 425 PM CDT.
Other locations in the path of this storm include Watson and
Dieterich.
This includes the following highways...
Interstate 57 between mile markers 144 and 156.
Interstate 70 between mile markers 79 and 89.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
Torrential rainfall is also occurring with this storm and may lead to
localized flooding. Do not drive your vehicle through flooded
roadways.
Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.
&&
LAT...LON 3909 8880 3908 8837 3892 8837 3892 8881
TIME...MOT...LOC 2114Z 273DEG 30KT 3898 8876
MAX HAIL SIZE...0.00 IN
MAX WIND GUST...50 MPH
25Local storm report, Aug 25, 5:39 PM CDT, 55 minutes before
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</html>The office that day
Everything else NWS Lincoln, IL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 25, 4:15 PM CDT | Special Weather Statement | ILX | Effingham | 30 min |
| Aug 25, 4:33 PM CDT | Severe Thunderstorm Warning | ILX | Clay, Effingham, Jasper | 42 min |
Nearby
Severe Thunderstorm Warnings in Illinois, 2023Every severe thunderstorm warning in 2023
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.