Alert archive / Illinois / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 117, NWS Lincoln, IL

October 24, 20215 counties in Illinois

NWS Lincoln, IL issued this severe thunderstorm warning at Oct 24, 2021, 5:56 PM CDT for 5 counties in Illinois. It was in force for 49 min. 6 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: Oct 24, 2021, 5:56 PM CDT (22:56 UTC)
Expired: Oct 24, 2021, 6:45 PM CDT
In force: 49 min
Issued by: NWS Lincoln, IL
Area: Storm-based polygon
Tornado: Possible
Hail: 1.0 in
Wind: 60.0 mph

Counties Cass County, IL, Menard County, IL, Morgan County, IL, Sangamon County, IL, Scott County, IL

The radar

The Lincoln radar (KILX), 101 km from the middle of the area, began a volume at 22:57 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.

What was reported inside it

Time	Report	Where	Remark
Oct 24, 6:16 PM CDT	TSTM WND DMG	1 Ese South Jacksonvill, IL	DAMAGE WAS REPORTED ALONG THE LENGTH OF VANDALIA ROAD. TREES WERE DOWN. A FACADE WAS TORN OFF A CHURCH.
Oct 24, 6:17 PM CDT	TSTM WND DMG	South Jacksonville, IL	TREE AND POWER LINE DAMAGE. TIME ESTIMATED.
Oct 24, 6:25 PM CDT	TSTM WND GST 60	Literberry, IL
Oct 24, 6:25 PM CDT	HAIL 1.75	Literberry, IL
Oct 24, 6:34 PM CDT	TSTM WND DMG	Ashland, IL	RELAYED BY BROADCAST MEDIA. TREE REPORTED DOWN OVER IL 123 NEAR DOWNTOWN.
Oct 24, 6:44 PM CDT	HAIL 1	Literberry, IL

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

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 24, 5:44 PM CDT	Tornado Watch	SPC	7 hr

The nearest sounding before it

Davenport, (KDVN), launched 12:00Z, 10.9 hours before the alert went out and 217 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 972 m above ground
0-6 km bulk shear: 61 kt
0-1 km storm-relative helicity: 120 m²/s²
0-3 km storm-relative helicity: 162 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

276 
WUUS53 KILX 242256
SVRILX
ILC017-129-137-167-171-242345-
/O.NEW.KILX.SV.W.0117.211024T2256Z-211024T2345Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Lincoln IL
556 PM CDT Sun Oct 24 2021

The National Weather Service in Lincoln has issued a

* Severe Thunderstorm Warning for...
  Scott County in west central Illinois...
  Southwestern Menard County in central Illinois...
  West central Sangamon County in central Illinois...
  Southeastern Cass County in west central Illinois...
  Morgan County in west central Illinois...

* Until 645 PM CDT.

* At 556 PM CDT, a severe thunderstorm was located near Winchester,
  moving east at 45 mph.

  HAZARD...60 mph wind gusts and quarter size hail.

  SOURCE...Radar indicated.

  IMPACT...Hail damage to vehicles is expected. Expect wind damage 
           to roofs, siding, and trees.

* This severe thunderstorm will be near...
  Chapin around 605 PM CDT.
  Jacksonville and Woodson around 615 PM CDT.

Other locations in the path of this severe thunderstorm include
Literberry, Alexander and Ashland.

This includes Interstate 72 between mile markers 43 and 79.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Tornado Watch remains in effect until 100 AM CDT for central and
west 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.

Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

A Tornado Watch remains in effect until 100 AM CDT for central and
west central Illinois.

&&

LAT...LON 3993 8999 3972 8999 3957 8993 3952 9048
      3952 9058 3955 9057 3963 9061 3964 9061
      3970 9065
TIME...MOT...LOC 2256Z 249DEG 41KT 3966 9050 

TORNADO...POSSIBLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

NMB

2 follow-up statements

038 
WWUS53 KILX 242318
SVSILX

Severe Weather Statement
National Weather Service Lincoln IL
618 PM CDT Sun Oct 24 2021

ILC017-129-137-167-171-242345-
/O.CON.KILX.SV.W.0117.000000T0000Z-211024T2345Z/
Scott-Menard-Sangamon-Cass-Morgan-
618 PM CDT Sun Oct 24 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 645 PM CDT
FOR SCOTT...SOUTHWESTERN MENARD...WEST CENTRAL SANGAMON...
SOUTHEASTERN CASS AND MORGAN COUNTIES...

At 617 PM CDT, a severe thunderstorm was located over Jacksonville,
moving east at 45 mph.

HAZARD...60 mph wind gusts and quarter size hail.

SOURCE...Radar indicated.

IMPACT...Hail damage to vehicles is expected. Expect wind damage to 
         roofs, siding, and trees.

Locations impacted include...
  Literberry, Alexander and Ashland.

This includes Interstate 72 between mile markers 43 and 79.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Tornado Watch remains in effect until 100 AM CDT for central and
west 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.

Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 3993 8999 3972 8999 3957 8993 3952 9048
      3952 9058 3955 9057 3963 9061 3964 9061
      3970 9065
TIME...MOT...LOC 2317Z 249DEG 41KT 3975 9020 

TORNADO...POSSIBLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

NMB

555 
WWUS53 KILX 242333
SVSILX

Severe Weather Statement
National Weather Service Lincoln IL
633 PM CDT Sun Oct 24 2021

ILC017-129-137-167-171-242345-
/O.CON.KILX.SV.W.0117.000000T0000Z-211024T2345Z/
Scott-Menard-Sangamon-Cass-Morgan-
633 PM CDT Sun Oct 24 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 645 PM CDT
FOR NORTHEASTERN SCOTT...SOUTHWESTERN MENARD...WEST CENTRAL
SANGAMON...SOUTHEASTERN CASS AND NORTHEASTERN MORGAN COUNTIES...

At 633 PM CDT, a severe thunderstorm was located near Pleasant
Plains, or 14 miles northeast of Jacksonville, moving east at 45 mph.

HAZARD...60 mph wind gusts and quarter size hail.

SOURCE...Radar indicated.

IMPACT...Hail damage to vehicles is expected. Expect wind damage to 
         roofs, siding, and trees.

Locations impacted include...
Jacksonville, Alexander, Ashland, Literberry, South Jacksonville,
Lynnville, Prentice, Sinclair and Jacksonville Municipal Airport.

This includes Interstate 72 between mile markers 58 and 65, and
between mile markers 67 and 79.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Tornado Watch remains in effect until 100 AM CDT for central and
west central Illinois.

A tornado watch remains in effect for the warned area. Tornadoes can
develop quickly from severe thunderstorms. Although a tornado is not
immediately likely, if one is spotted act quickly and move to a place
of safety inside a sturdy structure, such as a basement or small
interior room.

For your protection move to an interior room on the lowest floor of a
building.

Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 3993 8999 3972 8999 3967 9034 3967 9037
      3979 9039
TIME...MOT...LOC 2333Z 249DEG 41KT 3982 8998 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

NMB

The office that day

Everything else NWS Lincoln, IL issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Oct 24, 5:03 AM CDT	Flash Flood Warning	ILX	Morgan, Scott	3 hr
Oct 24, 6:15 AM CDT	Flood Watch	ILX	Macon, Morgan, Sangamon, Scott	20 hr
Oct 24, 10:08 AM CDT	River Flood Warning	ILX	Piatt	8 days
Oct 24, 3:35 PM CDT	Special Weather Statement	ILX	Fulton	25 min
Oct 24, 4:00 PM CDT	Special Weather Statement	ILX	Peoria	30 min
Oct 24, 5:00 PM CDT	Flash Flood Warning	ILX	Fulton, Schuyler	3 hr
Oct 24, 5:39 PM CDT	Special Weather Statement	ILX	McLean	51 min
Oct 24, 5:39 PM CDT	Severe Thunderstorm Warning	ILX	Cass, Mason, Morgan, Sangamon, Schuyler, Scott	51 min
Oct 24, 6:06 PM CDT	Tornado Warning	ILX	Cass, Morgan, Scott	24 min
Oct 24, 6:26 PM CDT	Severe Thunderstorm Warning	ILX	Champaign, McLean, Vermilion	34 min
Oct 24, 6:28 PM CDT	Severe Thunderstorm Warning Considerable damage threat	ILX	Cass, Mason, Menard, Morgan, Sangamon, Tazewell	62 min
Oct 24, 6:37 PM CDT	Flash Flood Warning	ILX	Cass, Morgan, Scott	3 hr
Oct 24, 6:38 PM CDT	Tornado Warning	ILX	Menard, Sangamon	26 min

Nearby

Severe Thunderstorm Warnings in Illinois, 2021 Every 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.