Alert archive / Illinois / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 10, NWS Lincoln, IL
NWS Lincoln, IL issued this severe thunderstorm warning at Apr 7, 2021, 7:49 PM CDT for 4 counties in Illinois. It was in force for 41 min. 2 reports came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- Apr 7, 2021, 7:49 PM CDT (00:49 UTC)
- Expired
- Apr 7, 2021, 8:30 PM CDT
- In force
- 41 min
- Issued by
- NWS Lincoln, IL
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties Cass County, IL, Menard County, IL, Morgan County, IL, Sangamon County, IL
The radar
The Lincoln radar (KILX), 56 km from the middle of the area, began a volume at 00:51 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 was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Apr 7, 8:05 PM CDT | TSTM WND DMG | 3 Ssw Southern View, IL | TIME ESTIMATED FROM RADAR. REPORT FROM MPING: 1-INCH TREE LIMBS BROKEN; SHINGLES BLOWN OFF. |
| Apr 7, 8:07 PM CDT | TSTM WND DMG | 2 Wnw Springfield, IL | REPORT OF TREE SNAPPED. TIME ESTIMATED BASED ON RADAR. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Lincoln, IL (KILX), launched 00:00Z, 0.8 hours before the alert went out and 105 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
- 220 J/kg
- Mixed-layer CIN
- -46 J/kg
- Mixed-layer LCL
- 1472 m above ground
- 0-6 km bulk shear
- 27 kt
- 0-1 km storm-relative helicity
- 31 m²/s²
- 0-3 km storm-relative helicity
- 108 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.3
The text
As transmitted.
286
WUUS53 KILX 080049
SVRILX
ILC017-129-137-167-080130-
/O.NEW.KILX.SV.W.0010.210408T0049Z-210408T0130Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Lincoln IL
749 PM CDT Wed Apr 7 2021
The National Weather Service in Lincoln has issued a
* Severe Thunderstorm Warning for...
Southern Menard County in central Illinois...
Sangamon County in central Illinois...
Southeastern Cass County in west central Illinois...
Northeastern Morgan County in west central Illinois...
* Until 830 PM CDT.
* At 749 PM CDT, severe thunderstorms were located along a line
extending from near Ashland to near Waverly to Virden, moving
northeast at 50 mph.
HAZARD...60 mph wind gusts and penny size hail.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
* Locations impacted include...
Springfield, Jacksonville, Chatham, Alexander, Auburn, Sherman,
Rochester, Riverton, Pawnee, Petersburg, Athens, Williamsville, New
Berlin, Ashland, Waverly, Divernon, Pleasant Plains, Loami,
Franklin and Mechanicsburg.
This includes the following highways...
Interstate 55 between mile markers 77 and 108.
Interstate 72 between mile markers 69 and 116.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4004 9006 4004 8975 3986 8937 3968 8946
3968 8948 3964 8948 3964 8953 3955 8953
3953 8954 3952 8970 3952 8992 3979 9028
TIME...MOT...LOC 0049Z 209DEG 42KT 3984 9008 3958 8985 3949 8975
HAIL...0.75IN
WIND...60MPH
$$
Deubelbeiss2 follow-up statements
112
WWUS53 KILX 080113
SVSILX
Severe Weather Statement
National Weather Service Lincoln IL
813 PM CDT Wed Apr 7 2021
ILC137-080123-
/O.CAN.KILX.SV.W.0010.000000T0000Z-210408T0130Z/
Morgan-
813 PM CDT Wed Apr 7 2021
...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN MORGAN COUNTY IS
CANCELLED...
The storms which prompted the warning have moved out of the warned
area. Therefore, the warning has been cancelled.
LAT...LON 4004 9006 4004 8975 3986 8937 3968 8946
3968 8948 3964 8948 3964 8953 3955 8953
3953 8954 3952 8970 3952 8986 3987 8998
3994 9013
TIME...MOT...LOC 0113Z 210DEG 54KT 4007 8992 3987 8963 3972 8959
$$
ILC017-129-167-080130-
/O.CON.KILX.SV.W.0010.000000T0000Z-210408T0130Z/
Menard-Sangamon-Cass-
813 PM CDT Wed Apr 7 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 830 PM CDT
FOR SOUTHERN MENARD...SANGAMON AND EAST CENTRAL CASS COUNTIES...
At 813 PM CDT, severe thunderstorms were located along a line
extending from near Petersburg to Sherman to near Rochester, moving
northeast at 60 mph.
HAZARD...60 mph wind gusts and penny size hail.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
Locations impacted include...
Springfield, Chatham, Auburn, Sherman, Rochester, Riverton, Pawnee,
Petersburg, Athens, Williamsville, New Berlin, Ashland, Divernon,
Pleasant Plains, Loami, Mechanicsburg, Tallula, Jerome, Southern View
and Leland Grove.
This includes the following highways...
Interstate 55 between mile markers 77 and 108.
Interstate 72 between mile markers 83 and 116.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4004 9006 4004 8975 3986 8937 3968 8946
3968 8948 3964 8948 3964 8953 3955 8953
3953 8954 3952 8970 3952 8986 3987 8998
3994 9013
TIME...MOT...LOC 0113Z 210DEG 54KT 4007 8992 3987 8963 3972 8959
HAIL...0.75IN
WIND...60MPH
$$
Deubelbeiss551
WWUS53 KILX 080126
SVSILX
Severe Weather Statement
National Weather Service Lincoln IL
826 PM CDT Wed Apr 7 2021
ILC017-129-167-080135-
/O.EXP.KILX.SV.W.0010.000000T0000Z-210408T0130Z/
Menard-Sangamon-Cass-
826 PM CDT Wed Apr 7 2021
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHERN MENARD...SANGAMON AND
EAST CENTRAL CASS COUNTIES WILL EXPIRE AT 830 PM CDT...
The storms which prompted the warning have weakened below severe
limits, and have exited the warned area. Therefore, the warning will
be allowed to expire. However gusty winds and heavy rain are still
possible with these thunderstorms.
LAT...LON 4004 9006 4004 8975 3986 8937 3968 8946
3968 8948 3964 8948 3964 8953 3955 8953
3953 8954 3952 8970 3952 8986 3987 8998
3994 9013
TIME...MOT...LOC 0125Z 209DEG 42KT 4019 8983 3999 8954 3984 8950
$$
DeubelbeissThe office that day
Everything else NWS Lincoln, IL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 7, 7:13 PM CDT | Special Weather Statement | ILX | Morgan, Scott | 47 min |
| Apr 7, 8:27 PM CDT | Special Weather Statement | ILX | Logan | 48 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.