Alert archive / Illinois / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 81, NWS Lincoln, IL
NWS Lincoln, IL issued this severe thunderstorm warning at Aug 8, 2021, 5:05 PM CDT for Logan County, Mason County, Menard County, Illinois. It was in force for 25 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
- Aug 8, 2021, 5:05 PM CDT (22:05 UTC)
- Expired
- Aug 8, 2021, 5:30 PM CDT
- In force
- 25 min
- Issued by
- NWS Lincoln, IL
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties Logan County, IL, Mason County, IL, Menard County, IL
The radar
The Lincoln radar (KILX), 40 km from the middle of the area, began a volume at 22:05 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, 10.1 hours before the alert went out and 102 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
- 310 J/kg
- Mixed-layer CIN
- -97 J/kg
- Mixed-layer LCL
- 1165 m above ground
- 0-6 km bulk shear
- 17 kt
- 0-1 km storm-relative helicity
- -25 m²/s²
- 0-3 km storm-relative helicity
- -3 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
127
WUUS53 KILX 082205
SVRILX
ILC107-125-129-082230-
/O.NEW.KILX.SV.W.0081.210808T2205Z-210808T2230Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Lincoln IL
505 PM CDT Sun Aug 8 2021
The National Weather Service in Lincoln has issued a
* Severe Thunderstorm Warning for...
Menard County in central Illinois...
West central Logan County in central Illinois...
Southeastern Mason County in central Illinois...
* Until 530 PM CDT.
* At 504 PM CDT, a severe thunderstorm was located over Petersburg,
or 16 miles east of Virginia, moving northeast at 55 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
* This severe thunderstorm will be near...
Greenview around 515 PM CDT.
Other locations in the path of this severe thunderstorm include Mason
City and Middletown.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4029 8970 4009 8946 3991 8993 3997 9000
4001 9000
TIME...MOT...LOC 2204Z 230DEG 47KT 4001 8990
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
SB2 follow-up statements
687 WWUS53 KILX 082220 SVSILX Severe Weather Statement National Weather Service Lincoln IL 520 PM CDT Sun Aug 8 2021 ILC107-125-129-082230- /O.CON.KILX.SV.W.0081.000000T0000Z-210808T2230Z/ Menard-Logan-Mason- 520 PM CDT Sun Aug 8 2021 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 530 PM CDT FOR NORTHERN MENARD...WESTERN LOGAN AND SOUTHEASTERN MASON COUNTIES... At 520 PM CDT, a severe thunderstorm was located near Mason City, moving northeast at 55 mph. HAZARD...60 mph wind gusts. SOURCE...Radar indicated. IMPACT...Expect damage to roofs, siding, and trees. This severe thunderstorm will remain over mainly rural areas of northern Menard, western Logan and southeastern Mason Counties, including the following locations... New Holland. PRECAUTIONARY/PREPAREDNESS ACTIONS... For your protection move to an interior room on the lowest floor of a building. && LAT...LON 4015 8953 4003 8980 4009 8991 4029 8970 TIME...MOT...LOC 2220Z 230DEG 47KT 4015 8968 HAIL THREAT...RADAR INDICATED MAX HAIL SIZE...<.75 IN WIND THREAT...RADAR INDICATED MAX WIND GUST...60 MPH $$ SB
852
WWUS53 KILX 082234
SVSILX
Severe Weather Statement
National Weather Service Lincoln IL
534 PM CDT Sun Aug 8 2021
ILC107-125-129-082244-
/O.EXP.KILX.SV.W.0081.000000T0000Z-210808T2230Z/
Menard-Logan-Mason-
534 PM CDT Sun Aug 8 2021
...THE SEVERE THUNDERSTORM WARNING FOR NORTHERN MENARD...WESTERN
LOGAN AND SOUTHEASTERN MASON COUNTIES HAS EXPIRED...
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning has been allowed to expire.
LAT...LON 4015 8953 4003 8980 4009 8991 4029 8970
TIME...MOT...LOC 2234Z 230DEG 47KT 4025 8953
$$
SBThe office that day
Everything else NWS Lincoln, IL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 8, 2:21 PM CDT | Special Weather Statement | ILX | McLean | 24 min |
| Aug 8, 3:30 PM CDT | Special Weather Statement | ILX | McLean | 30 min |
| Aug 8, 4:29 PM CDT | Special Weather Statement | ILX | Morgan | 31 min |
| Aug 8, 4:45 PM CDT | Areal Flood Advisory | ILX | McLean | 2 hr |
| Aug 8, 4:54 PM CDT | Special Weather Statement | ILX | Menard | 36 min |
| Aug 8, 5:02 PM CDT | Special Weather Statement | ILX | Woodford | 28 min |
| Aug 8, 5:14 PM CDT | Severe Thunderstorm Warning | ILX | McLean, Tazewell, Woodford | 46 min |
| Aug 8, 5:29 PM CDT | Special Weather Statement | ILX | Sangamon | 31 min |
| Aug 8, 5:35 PM CDT | Flash Flood Warning | ILX | McLean | 3 hr |
| Aug 8, 5:46 PM CDT | Special Weather Statement | ILX | Sangamon | 29 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.