Alert archive / Illinois / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 116, NWS Lincoln, IL

October 24, 20216 counties in Illinois

NWS Lincoln, IL issued this severe thunderstorm warning at Oct 24, 2021, 5:39 PM CDT for 6 counties in Illinois. It was in force for 51 min. 3 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, 5:39 PM CDT (22:39 UTC)
Expired
Oct 24, 2021, 6:30 PM CDT
In force
51 min
Issued by
NWS Lincoln, IL
Area
Storm-based polygon
Tornado
Possible
Hail
1.0 in
Wind
60.0 mph

Counties Cass County, IL, Mason County, IL, Morgan County, IL, Sangamon County, IL, Schuyler County, IL, Scott County, IL

The radar

The Lincoln radar (KILX), 97 km from the middle of the area, began a volume at 22:38 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

TimeReportWhereRemark
Oct 24, 6:25 PM CDTTSTM WND GST 60Literberry, IL
Oct 24, 6:25 PM CDTHAIL 1.75Literberry, IL
Oct 24, 6:34 PM CDTTSTM WND DMGAshland, ILRELAYED BY BROADCAST MEDIA. TREE REPORTED DOWN OVER IL 123 NEAR DOWNTOWN.

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

The nearest sounding before it

Davenport, (KDVN), launched 12:00Z, 10.7 hours before the alert went out and 194 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-pSkew-T log-p diagram, Davenport, at 12:00Z on 2021-10-24Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Davenport, at 12:00Z on 2021-10-24The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 120 square meters per square second.1939587897Sfc1 km3 km6 km9 kmRMLM
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.

106 
WUUS53 KILX 242239
SVRILX
ILC017-125-137-167-169-171-242330-
/O.NEW.KILX.SV.W.0116.211024T2239Z-211024T2330Z/

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

The National Weather Service in Lincoln has issued a

* Severe Thunderstorm Warning for...
  Northern Scott County in west central Illinois...
  Western Sangamon County in central Illinois...
  Cass County in west central Illinois...
  Southeastern Schuyler County in west central Illinois...
  Southwestern Mason County in central Illinois...
  Northwestern Morgan County in west central Illinois...

* Until 630 PM CDT.

* At 539 PM CDT, a severe thunderstorm was located over Meredosia, or
  13 miles north of Winchester, moving northeast at 50 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 545 PM CDT.
  Arenzville around 550 PM CDT.
  Bluff Springs around 555 PM CDT.

Other locations in the path of this severe thunderstorm include
Literberry, Virginia and Chandlerville.

This includes Interstate 72 between mile markers 43 and 46.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

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 3983 9057 3987 9059 3992 9054 3999 9051
      4017 9011 3994 8999 3985 8999 3967 9063
      3970 9065
TIME...MOT...LOC 2239Z 240DEG 43KT 3982 9055 

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

$$

NMB
1 follow-up statement
240 
WWUS53 KILX 242259
SVSILX

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

ILC017-125-137-167-169-171-242330-
/O.CON.KILX.SV.W.0116.000000T0000Z-211024T2330Z/
Scott-Sangamon-Cass-Schuyler-Mason-Morgan-
559 PM CDT Sun Oct 24 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 630 PM CDT
FOR NORTHERN SCOTT...WESTERN SANGAMON...CASS...SOUTHEASTERN
SCHUYLER...SOUTHWESTERN MASON AND NORTHWESTERN MORGAN COUNTIES...

At 558 PM CDT, a severe thunderstorm was located near Arenzville, or
9 miles southwest of Virginia, moving northeast at 55 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...
  Virginia, Ashland and Chandlerville.

This includes Interstate 72 between mile markers 43 and 46.
 
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 3983 9057 3987 9059 3992 9054 3999 9051
      4017 9011 3994 8999 3985 8999 3967 9063
      3970 9065
TIME...MOT...LOC 2258Z 240DEG 52KT 3985 9032 

TORNADO...POSSIBLE
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.

IssuedProductOfficeCountiesLasted
Oct 24, 5:03 AM CDTFlash Flood WarningILXMorgan, Scott3 hr
Oct 24, 6:15 AM CDTFlood WatchILXMacon, Morgan, Sangamon, Scott20 hr
Oct 24, 10:08 AM CDTRiver Flood WarningILXPiatt8 days
Oct 24, 3:35 PM CDTSpecial Weather StatementILXFulton25 min
Oct 24, 4:00 PM CDTSpecial Weather StatementILXPeoria30 min
Oct 24, 5:00 PM CDTFlash Flood WarningILXFulton, Schuyler3 hr
Oct 24, 5:39 PM CDTSpecial Weather StatementILXMcLean51 min
Oct 24, 5:56 PM CDTSevere Thunderstorm WarningILXCass, Menard, Morgan, Sangamon, Scott49 min
Oct 24, 6:06 PM CDTTornado WarningILXCass, Morgan, Scott24 min
Oct 24, 6:26 PM CDTSevere Thunderstorm WarningILXChampaign, McLean, Vermilion34 min
Oct 24, 6:28 PM CDTSevere Thunderstorm Warning Considerable damage threatILXCass, Mason, Menard, Morgan, Sangamon, Tazewell62 min
Oct 24, 6:37 PM CDTFlash Flood WarningILXCass, Morgan, Scott3 hr
Oct 24, 6:38 PM CDTTornado WarningILXMenard, Sangamon26 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.