Alert archive / Illinois / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 112, NWS Lincoln, IL
NWS Lincoln, IL issued this severe thunderstorm warning at Oct 11, 2021, 4:56 PM CDT for 4 counties in Illinois. It was in force for 49 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Oct 11, 2021, 4:56 PM CDT (21:56 UTC)
- Expired
- Oct 11, 2021, 5:45 PM CDT
- In force
- 49 min
- Issued by
- NWS Lincoln, IL
- Area
- Storm-based polygon
- Tornado
- Possible
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties DeWitt County, IL, Logan County, IL, Macon County, IL, Piatt County, IL
The radar
The Lincoln radar (KILX), 45 km from the middle of the area, began a volume at 21:57 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 watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Oct 11, 3:10 PM CDT | Tornado Watch | SPC | 6 hr |
The nearest sounding before it
Lincoln, IL (KILX), launched 12:00Z, 9.9 hours before the alert went out and 25 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
- 287 J/kg
- Mixed-layer CIN
- -72 J/kg
- Mixed-layer LCL
- 867 m above ground
- 0-6 km bulk shear
- 52 kt
- 0-1 km storm-relative helicity
- 206 m²/s²
- 0-3 km storm-relative helicity
- 230 m²/s²
- Significant tornado parameter
- 0.3
- Supercell composite
- 1.3
The text
As transmitted.
744 WUUS53 KILX 112156 SVRILX ILC039-107-115-147-112245- /O.NEW.KILX.SV.W.0112.211011T2156Z-211011T2245Z/ BULLETIN - IMMEDIATE BROADCAST REQUESTED Severe Thunderstorm Warning National Weather Service Lincoln IL 456 PM CDT Mon Oct 11 2021 The National Weather Service in Lincoln has issued a * Severe Thunderstorm Warning for... Southeastern Logan County in central Illinois... Western Piatt County in central Illinois... Southeastern De Witt County in central Illinois... Northern Macon County in central Illinois... * Until 545 PM CDT. * At 456 PM CDT, severe thunderstorms were located along a line extending from near Latham to near Harristown, moving east at 40 mph. HAZARD...60 mph wind gusts. SOURCE...Radar indicated. IMPACT...Expect damage to roofs, siding, and trees. * Severe thunderstorms will be near... Harristown and Warrensburg around 500 PM CDT. Decatur around 505 PM CDT. Forsyth and Maroa around 515 PM CDT. Other locations in the path of these severe thunderstorms include Oreana, Cerro Gordo, Argenta, Weldon, Bement, De Land and Monticello. This includes Interstate 72 between mile markers 129 and 164. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Tornado Watch remains in effect until 900 PM CDT for central Illinois. Remain alert for a possible tornado! Tornadoes can develop quickly from severe thunderstorms. If you spot a tornado go at once into the basement or small central room in a sturdy structure. For your protection move to an interior room on the lowest floor of a building. A Tornado Watch remains in effect until 900 PM CDT for central Illinois. && LAT...LON 4018 8864 3992 8855 3979 8913 4003 8921 TIME...MOT...LOC 2156Z 249DEG 35KT 4000 8917 3981 8911 TORNADO...POSSIBLE HAIL THREAT...RADAR INDICATED MAX HAIL SIZE...<.75 IN WIND THREAT...RADAR INDICATED MAX WIND GUST...60 MPH $$ Shimon
2 follow-up statements
392 WWUS53 KILX 112218 SVSILX Severe Weather Statement National Weather Service Lincoln IL 518 PM CDT Mon Oct 11 2021 ILC107-112228- /O.CAN.KILX.SV.W.0112.000000T0000Z-211011T2245Z/ Logan- 518 PM CDT Mon Oct 11 2021 ...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN LOGAN COUNTY IS CANCELLED... The storms which prompted the warning have moved out of the warned area. Therefore, the warning has been cancelled. A Tornado Watch remains in effect until 900 PM CDT for central Illinois. LAT...LON 4018 8864 3992 8855 3982 8900 4007 8905 TIME...MOT...LOC 2218Z 247DEG 34KT 4007 8895 3988 8892 $$ ILC039-115-147-112245- /O.CON.KILX.SV.W.0112.000000T0000Z-211011T2245Z/ Piatt-De Witt-Macon- 518 PM CDT Mon Oct 11 2021 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 545 PM CDT FOR WESTERN PIATT...SOUTHEASTERN DE WITT AND NORTHEASTERN MACON COUNTIES... At 518 PM CDT, severe thunderstorms were located along a line extending from Maroa to near Decatur, moving east at 40 mph. HAZARD...60 mph wind gusts. SOURCE...Radar indicated. IMPACT...Expect damage to roofs, siding, and trees. Locations impacted include... Cerro Gordo, Argenta, Weldon, Bement, De Land and Monticello. This includes Interstate 72 between mile markers 138 and 164. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Tornado Watch remains in effect until 900 PM CDT for central Illinois. Remain alert for a possible tornado! Tornadoes can develop quickly from severe thunderstorms. If you spot a tornado go at once into the basement or small central room in a sturdy structure. For your protection move to an interior room on the lowest floor of a building. && LAT...LON 4018 8864 3992 8855 3982 8900 4007 8905 TIME...MOT...LOC 2218Z 247DEG 34KT 4007 8895 3988 8892 TORNADO...POSSIBLE HAIL THREAT...RADAR INDICATED MAX HAIL SIZE...<.75 IN WIND THREAT...RADAR INDICATED MAX WIND GUST...60 MPH $$ Shimon
180 WWUS53 KILX 112234 SVSILX Severe Weather Statement National Weather Service Lincoln IL 534 PM CDT Mon Oct 11 2021 ILC039-115-147-112245- /O.CON.KILX.SV.W.0112.000000T0000Z-211011T2245Z/ Piatt-De Witt-Macon- 534 PM CDT Mon Oct 11 2021 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 545 PM CDT FOR WESTERN PIATT...SOUTHEASTERN DE WITT AND NORTHEASTERN MACON COUNTIES... At 534 PM CDT, severe thunderstorms were located along a line extending from Weldon to near Cerro Gordo, moving east at 40 mph. HAZARD...60 mph wind gusts. SOURCE...Radar indicated. IMPACT...Expect damage to roofs, siding, and trees. Locations impacted include... Monticello, Bement, Cerro Gordo, Argenta, De Land, Weldon, Oakley, Cisco and Milmine. This includes Interstate 72 between mile markers 151 and 164. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Tornado Watch remains in effect until 900 PM CDT for central Illinois. Remain alert for a possible tornado! Tornadoes can develop quickly from severe thunderstorms. If you spot a tornado go at once into the basement or small central room in a sturdy structure. For your protection move to an interior room on the lowest floor of a building. && LAT...LON 4018 8864 3992 8855 3987 8881 4013 8883 TIME...MOT...LOC 2234Z 249DEG 35KT 4012 8877 3993 8874 TORNADO...POSSIBLE HAIL THREAT...RADAR INDICATED MAX HAIL SIZE...<.75 IN WIND THREAT...RADAR INDICATED MAX WIND GUST...60 MPH $$ Shimon
The office that day
Everything else NWS Lincoln, IL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Oct 11, 12:00 PM CDT | Special Weather Statement | ILX | Morgan | 30 min |
| Oct 11, 12:55 PM CDT | Special Weather Statement | ILX | Sangamon | 35 min |
| Oct 11, 2:08 PM CDT | Special Weather Statement | ILX | Schuyler, Scott | 37 min |
| Oct 11, 2:27 PM CDT | Special Weather Statement | ILX | Crawford, Lawrence, Richland | 33 min |
| Oct 11, 2:50 PM CDT | Tornado Warning | ILX | Morgan | 25 min |
| Oct 11, 3:12 PM CDT | Tornado Warning | ILX | Morgan, Sangamon | 33 min |
| Oct 11, 3:32 PM CDT | Tornado Warning | ILX | Cass, Menard, Morgan, Sangamon | 30 min |
| Oct 11, 3:50 PM CDT | Tornado Warning | ILX | Fulton, Mason, Tazewell | 25 min |
| Oct 11, 4:21 PM CDT | Tornado Warning | ILX | Logan, Mason | 24 min |
| Oct 11, 4:47 PM CDT | Tornado Warning | ILX | Marshall, Woodford | 28 min |
| Oct 11, 5:03 PM CDT | Severe Thunderstorm Warning | ILX | DeWitt, Logan, McLean, Macon, Piatt | 42 min |
| Oct 11, 5:14 PM CDT | Severe Thunderstorm Warning | ILX | McLean, Woodford | 61 min |
| Oct 11, 5:38 PM CDT | Tornado Warning | ILX | Woodford | 20 min |
| Oct 11, 5:42 PM CDT | Severe Thunderstorm Warning | ILX | Champaign, DeWitt, Douglas, McLean, Macon, Piatt | 63 min |
| Oct 11, 6:52 PM CDT | Special Weather Statement | ILX | Champaign, Douglas, Vermilion | 83 min |
Nearby
Severe Thunderstorm Warnings in Illinois, 2021Every severe thunderstorm warning in 2021
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.