Alert archive / Illinois / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 36, NWS Lincoln, IL

June 18, 2021Sangamon County, Illinois

NWS Lincoln, IL issued this severe thunderstorm warning at Jun 18, 2021, 8:22 PM CDT for Sangamon County, Illinois. It was in force for 38 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
Jun 18, 2021, 8:22 PM CDT (01:22 UTC)
Expired
Jun 18, 2021, 9:00 PM CDT
In force
38 min
Issued by
NWS Lincoln, IL
Area
Storm-based polygon
Hail
1.0 in
Wind
60.0 mph

County Sangamon County, IL

The radar

The Lincoln radar (KILX), 66 km from the middle of the area, began a volume at 01:22 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
Jun 18, 8:23 PM CDTTSTM WND GST 60New Berlin, ILDELAYED REPORT. SANGAMON COUNTY FAIR. SEVERAL TENTS BLOWN OVER. TIME ESTIMATED FROM RADAR.
Jun 18, 8:46 PM CDTTSTM WND GST 523 Sw Chatham, IL

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, 1.4 hours before the alert went out and 115 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, Lincoln, IL at 00:00Z on 2021-06-19Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2124 joules per kilogram.LCLLFCEL10008507005003002001001 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, Lincoln, IL at 00:00Z on 2021-06-19The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 165 square meters per square second.193958Sfc1 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
2124 J/kg
Mixed-layer CIN
-145 J/kg
Mixed-layer LCL
1616 m above ground
0-6 km bulk shear
42 kt
0-1 km storm-relative helicity
165 m²/s²
0-3 km storm-relative helicity
200 m²/s²
Significant tornado parameter
0.2
Supercell composite
4.0

Open this sounding in Storm Lab

The text

As transmitted.

835 
WUUS53 KILX 190122
SVRILX
ILC167-190200-
/O.NEW.KILX.SV.W.0036.210619T0122Z-210619T0200Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Lincoln IL
822 PM CDT Fri Jun 18 2021

The National Weather Service in Lincoln has issued a

* Severe Thunderstorm Warning for...
  Southwestern Sangamon County in central Illinois...

* Until 900 PM CDT.

* At 822 PM CDT, a severe thunderstorm was located over Loami, or 13
  miles southwest of Springfield, moving east at 30 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...
  Auburn around 835 PM CDT.
  Chatham around 840 PM CDT.

Other locations in the path of this severe thunderstorm include
Springfield and Pawnee.

This includes the following highways...
 Interstate 55 between mile markers 82 and 96.
 Interstate 72 between mile markers 81 and 102.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3962 8994 3978 8997 3979 8960 3958 8954
TIME...MOT...LOC 0122Z 278DEG 27KT 3970 8987 

HAIL...1.00IN
WIND...60MPH
 
$$

Deubelbeiss
2 follow-up statements
116 
WWUS53 KILX 190140
SVSILX

Severe Weather Statement
National Weather Service Lincoln IL
840 PM CDT Fri Jun 18 2021

ILC167-190200-
/O.CON.KILX.SV.W.0036.000000T0000Z-210619T0200Z/
Sangamon-
840 PM CDT Fri Jun 18 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 900 PM CDT
FOR SOUTHWESTERN SANGAMON COUNTY...

At 840 PM CDT, a severe thunderstorm was located near Chatham, or 9
miles north of Virden, moving east at 30 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...
  Chatham, Springfield, Divernon and Pawnee.

This includes the following highways...
 Interstate 55 between mile markers 82 and 96.
 Interstate 72 between mile markers 81 and 102.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3962 8994 3978 8997 3979 8960 3958 8954
TIME...MOT...LOC 0140Z 285DEG 25KT 3964 8976 

HAIL...1.00IN
WIND...60MPH
 
$$

Deubelbeiss
147 
WWUS53 KILX 190201
SVSILX

Severe Weather Statement
National Weather Service Lincoln IL
901 PM CDT Fri Jun 18 2021

ILC167-190210-
/O.EXP.KILX.SV.W.0036.000000T0000Z-210619T0200Z/
Sangamon-
901 PM CDT Fri Jun 18 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN SANGAMON COUNTY
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.  However a new 
thunderstorm has developed to the west and gusty winds and heavy 
rain are still possible.

LAT...LON 3962 8994 3978 8997 3979 8960 3958 8954
TIME...MOT...LOC 0200Z 278DEG 27KT 3962 8957 

$$

Deubelbeiss

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 18, 7:15 PM CDTSpecial Weather StatementILXCrawford30 min
Jun 18, 7:52 PM CDTSpecial Weather StatementILXMorgan23 min
Jun 18, 8:08 PM CDTSpecial Weather StatementILXSangamon52 min
Jun 18, 8:43 PM CDTSevere Thunderstorm WarningILXChristian, Sangamon47 min
Jun 18, 9:13 PM CDTSpecial Weather StatementILXClark32 min
Jun 18, 9:44 PM CDTSevere Thunderstorm WarningILXClark, Cumberland46 min
Jun 18, 10:24 PM CDTSevere Thunderstorm WarningILXKnox, Peoria36 min
Jun 18, 10:32 PM CDTSevere Thunderstorm WarningILXClark, Crawford25 min
Jun 18, 11:06 PM CDTSevere Thunderstorm WarningILXKnox39 min
Jun 18, 11:29 PM CDTSevere Thunderstorm WarningILXClark46 min
Jun 18, 11:47 PM CDTSevere Thunderstorm WarningILXFulton, Knox, Peoria43 min
Jun 18, 11:57 PM CDTTornado WarningILXFulton, Knox33 min
Jun 19, 12:13 AM CDTSevere Thunderstorm WarningILXFulton, Mason, Peoria, Tazewell47 min
Jun 19, 12:26 AM CDTFlash Flood WarningILXClark6 hr
Jun 19, 12:28 AM CDTFlash Flood WarningILXFulton, Knox5 hr
Jun 19, 12:52 AM CDTSevere Thunderstorm WarningILXLogan, McLean, Mason, Tazewell38 min
Jun 19, 1:19 AM CDTSevere Thunderstorm WarningILXLogan, McLean, Tazewell41 min
Jun 19, 1:23 AM CDTSevere Thunderstorm WarningILXMcLean52 min
Jun 19, 1:53 AM CDTFlash Flood WarningILXColes, Douglas, Edgar5 hr
Jun 19, 1:59 AM CDTSevere Thunderstorm WarningILXEdgar46 min
Jun 19, 2:19 AM CDTSevere Thunderstorm WarningILXMcLean41 min
Jun 19, 3:29 AM CDTFlash Flood WarningILXChampaign, Douglas, Edgar, Vermilion3 hr
Jun 19, 3:37 AM CDTSpecial Weather StatementILXChampaign, Douglas, Edgar, Vermilion53 min
Jun 19, 7:06 AM CDTSevere Thunderstorm WarningILXChristian, Macon, Sangamon24 min
Jun 19, 7:29 AM CDTSevere Thunderstorm WarningILXChristian, Macon, Shelby31 min
Jun 19, 10:19 AM CDTSevere Thunderstorm WarningILXMorgan, Sangamon41 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.