Alert archive / Illinois / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 20, NWS Lincoln, IL

May 3, 20214 counties in Illinois

NWS Lincoln, IL issued this severe thunderstorm warning at May 3, 2021, 8:19 PM CDT for 4 counties in Illinois. It was in force for 41 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: May 3, 2021, 8:19 PM CDT (01:19 UTC)
Expired: May 3, 2021, 9:00 PM CDT
In force: 41 min
Issued by: NWS Lincoln, IL
Area: Storm-based polygon
Tornado: Possible
Hail: 1.0 in
Wind: 60.0 mph

Counties Coles County, IL, Cumberland County, IL, Moultrie County, IL, Shelby County, IL

The radar

The Lincoln radar (KILX), 112 km from the middle of the area, began a volume at 01:21 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
May 3, 2:47 PM CDT	Severe Thunderstorm Watch	SPC	6 hr
May 3, 7:58 PM CDT	Severe Thunderstorm Watch	SPC	3 hr

The nearest sounding before it

Lincoln, IL (KILX), launched 00:00Z, 1.3 hours before the alert went out and 87 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: 758 J/kg
Mixed-layer CIN: -32 J/kg
Mixed-layer LCL: 843 m above ground
0-6 km bulk shear: 48 kt
0-1 km storm-relative helicity: -13 m²/s²
0-3 km storm-relative helicity: 74 m²/s²
Significant tornado parameter: 0.3
Supercell composite: 1.4

Open this sounding in Storm Lab

The text

As transmitted.

798 
WUUS53 KILX 040119
SVRILX
ILC029-035-139-173-040200-
/O.NEW.KILX.SV.W.0020.210504T0119Z-210504T0200Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Lincoln IL
819 PM CDT Mon May 3 2021

The National Weather Service in Lincoln has issued a

* Severe Thunderstorm Warning for...
  Southwestern Coles County in east central Illinois...
  Southeastern Moultrie County in central Illinois...
  East central Shelby County in central Illinois...
  Northwestern Cumberland County in east central Illinois...

* Until 900 PM CDT.

* At 818 PM CDT, a severe thunderstorm was located over Windsor, or 9
  miles east of Shelbyville, moving east at 35 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...
  Mattoon, Toledo, Neoga, Windsor, Lerna, Janesville, Paradise,
  Strasburg, Gays, Trowbridge, Etna, Wolf Creek State Park, Fox Ridge
  State Park, Eagle Creek State Park and Trilla.

This includes the following highways...
 Interstate 57 between mile markers 174 and 187.
 Interstate 70 near mile marker 115.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3935 8874 3950 8873 3943 8813 3923 8820
TIME...MOT...LOC 0118Z 274DEG 30KT 3941 8862 

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

37

2 follow-up statements

189 
WWUS53 KILX 040139
SVSILX

Severe Weather Statement
National Weather Service Lincoln IL
839 PM CDT Mon May 3 2021

ILC139-173-040148-
/O.CAN.KILX.SV.W.0020.000000T0000Z-210504T0200Z/
Moultrie-Shelby-
839 PM CDT Mon May 3 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN MOULTRIE AND EAST
CENTRAL SHELBY COUNTIES IS CANCELLED...
    
The severe thunderstorm which prompted the warning has moved out of 
the warned area. Therefore, the warning has been cancelled.

A Severe Thunderstorm Watch remains in effect until 900 PM CDT for
east central Illinois. A Severe Thunderstorm Watch also remains in
effect until midnight CDT for east central Illinois.

LAT...LON 3923 8820 3929 8847 3947 8847 3943 8813
TIME...MOT...LOC 0138Z 274DEG 30KT 3940 8840 

$$

ILC029-035-040200-
/O.CON.KILX.SV.W.0020.000000T0000Z-210504T0200Z/
Coles-Cumberland-
839 PM CDT Mon May 3 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 900 PM CDT
FOR SOUTHWESTERN COLES AND NORTHWESTERN CUMBERLAND COUNTIES...

At 838 PM CDT, a severe thunderstorm was located near Mattoon, moving
east at 35 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...
Mattoon, Toledo, Neoga, Lerna, Janesville, Paradise, Etna, Trilla and
Fox Ridge State Park.

This includes the following highways...
 Interstate 57 between mile markers 174 and 187.
 Interstate 70 near mile marker 115.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3923 8820 3929 8847 3947 8847 3943 8813
TIME...MOT...LOC 0138Z 274DEG 30KT 3940 8840 

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

37

688 
WWUS53 KILX 040159
SVSILX

Severe Weather Statement
National Weather Service Lincoln IL
859 PM CDT Mon May 3 2021

ILC029-035-040208-
/O.EXP.KILX.SV.W.0020.000000T0000Z-210504T0200Z/
Coles-Cumberland-
859 PM CDT Mon May 3 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN COLES AND
NORTHWESTERN CUMBERLAND COUNTIES WILL EXPIRE AT 900 PM CDT...
    
The severe thunderstorm which prompted the warning has weakened.
Therefore, the warning will be allowed to expire.  However small 
hail is still possible with this thunderstorm.

A Severe Thunderstorm Watch remains in effect until 900 PM CDT for
east central Illinois. A Severe Thunderstorm Watch also remains in
effect until midnight CDT for east central Illinois.

LAT...LON 3923 8820 3929 8847 3947 8847 3943 8813
TIME...MOT...LOC 0158Z 274DEG 30KT 3939 8819 

$$

Shimon

The office that day

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

Issued	Product	Office	Counties	Lasted
May 3, 7:06 PM CDT	Severe Thunderstorm Warning	ILX	Coles, Douglas, Macon, Moultrie, Shelby	54 min
May 3, 7:20 PM CDT	Tornado Warning	ILX	Moultrie	25 min
May 3, 7:33 PM CDT	Severe Thunderstorm Warning	ILX	Christian, Shelby	42 min
May 3, 7:57 PM CDT	Severe Thunderstorm Warning	ILX	Clark, Coles, Edgar	63 min
May 3, 8:02 PM CDT	Tornado Warning	ILX	Coles	28 min
May 3, 8:53 PM CDT	Flash Flood Warning	ILX	Coles	50 min
May 3, 9:02 PM CDT	Special Weather Statement	ILX	Clark, Cumberland, Effingham, Jasper	43 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.