Alert archive / Illinois / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 60, NWS Lincoln, IL

June 25, 20214 counties in Illinois

NWS Lincoln, IL issued this severe thunderstorm warning at Jun 25, 2021, 8:16 PM CDT for 4 counties in Illinois. It was in force for 44 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: Jun 25, 2021, 8:16 PM CDT (01:16 UTC)
Expired: Jun 25, 2021, 9:00 PM CDT
In force: 44 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), 59 km from the middle of the area, began a volume at 01:15 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
Jun 25, 5:06 PM CDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Lincoln, IL (KILX), launched 00:00Z, 1.3 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-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: 1254 J/kg
Mixed-layer CIN: -26 J/kg
Mixed-layer LCL: 910 m above ground
0-6 km bulk shear: 30 kt
0-1 km storm-relative helicity: 105 m²/s²
0-3 km storm-relative helicity: 204 m²/s²
Significant tornado parameter: 0.7
Supercell composite: 6.6

Open this sounding in Storm Lab

The text

As transmitted.

832 
WUUS53 KILX 260116
SVRILX
ILC017-129-137-167-260200-
/O.NEW.KILX.SV.W.0060.210626T0116Z-210626T0200Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Lincoln IL
816 PM CDT Fri Jun 25 2021

The National Weather Service in Lincoln has issued a

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

* Until 900 PM CDT.

* At 816 PM CDT, severe thunderstorms were located along a line
  extending from near Virginia to near Murrayville, 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.

* Severe thunderstorms will be near...
  Virginia around 820 PM CDT.
  Ashland and Franklin around 825 PM CDT.
  Alexander, Waverly and Tallula around 830 PM CDT.

Other locations in the path of these severe thunderstorms include
Petersburg, New Berlin, Loami, Chatham, Springfield and Greenview.

This includes the following highways...
 Interstate 55 between mile markers 78 and 92.
 Interstate 72 between mile markers 64 and 98.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4015 8964 3954 8964 3952 8977 3952 9025
      3995 9027
TIME...MOT...LOC 0116Z 240DEG 44KT 3991 9019 3956 9018 

HAIL...0.75IN
WIND...60MPH
 
$$

Auten

1 follow-up statement

295 
WWUS53 KILX 260154
SVSILX

Severe Weather Statement
National Weather Service Lincoln IL
854 PM CDT Fri Jun 25 2021

ILC017-129-137-167-260203-
/O.EXP.KILX.SV.W.0060.000000T0000Z-210626T0200Z/
Menard-Sangamon-Cass-Morgan-
854 PM CDT Fri Jun 25 2021

...THE SEVERE THUNDERSTORM WARNING FOR MENARD...WESTERN SANGAMON...
SOUTHEASTERN CASS AND MORGAN COUNTIES WILL EXPIRE AT 900 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.

A Severe Thunderstorm Watch remains in effect until 1100 PM CDT for
central and west central Illinois.

LAT...LON 4015 8964 3954 8964 3952 8977 3952 9025
      3995 9027
TIME...MOT...LOC 0153Z 240DEG 44KT 4012 8971 3977 8971 

$$

Auten

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 25, 7:21 PM CDT	Severe Thunderstorm Warning	ILX	Logan, Mason, Tazewell	39 min
Jun 25, 7:33 PM CDT	Special Weather Statement	ILX	McLean	42 min
Jun 25, 7:38 PM CDT	Severe Thunderstorm Warning	ILX	Morgan, Scott	67 min
Jun 25, 7:53 PM CDT	Severe Thunderstorm Warning	ILX	DeWitt, Logan, McLean, Tazewell	67 min
Jun 25, 8:29 PM CDT	Tornado Warning	ILX	McLean	30 min
Jun 25, 8:49 PM CDT	Severe Thunderstorm Warning	ILX	DeWitt, McLean, Macon, Piatt	41 min
Jun 25, 8:54 PM CDT	Flash Flood Warning	ILX	DeWitt, Logan, McLean, Mason, Tazewell	6 hr
Jun 25, 9:05 PM CDT	Severe Thunderstorm Warning	ILX	Logan, Mason, Menard, Tazewell	25 min
Jun 25, 9:47 PM CDT	Flash Flood Warning	ILX	Morgan, Scott	6 hr
Jun 25, 9:59 PM CDT	Flash Flood Warning	ILX	DeWitt, McLean, Piatt	5 hr
Jun 25, 10:18 PM CDT	Severe Thunderstorm Warning	ILX	Champaign, Coles, DeWitt, Douglas, Macon, Moultrie and 1 more	27 min
Jun 26, 2:34 AM CDT	Areal Flood Warning	ILX	DeWitt, Logan, McLean, Mason, Piatt, Tazewell	61 hr
Jun 26, 6:03 AM CDT	River Flood Warning	ILX	Piatt	8 days
Jun 26, 9:44 AM CDT	River Flood Warning	ILX	Mason, Menard	4 days
Jun 26, 12:21 PM CDT	Tornado Warning	ILX	McLean	24 min
Jun 26, 1:24 PM CDT	Tornado Warning	ILX	Morgan, Scott	36 min
Jun 26, 1:53 PM CDT	Tornado Warning	ILX	Morgan	37 min
Jun 26, 2:17 PM CDT	Tornado Warning	ILX	Morgan, Sangamon	28 min
Jun 26, 2:38 PM CDT	Tornado Warning	ILX	McLean, Woodford	37 min
Jun 26, 3:12 PM CDT	Tornado Warning	ILX	McLean	33 min
Jun 26, 3:19 PM CDT	Tornado Warning	ILX	Logan, Sangamon	26 min
Jun 26, 3:25 PM CDT	Flash Flood Warning	ILX	DeWitt, Logan, McLean, Macon, Mason, Menard and 3 more	4 hr
Jun 26, 3:33 PM CDT	Severe Thunderstorm Warning	ILX	Logan	27 min
Jun 26, 3:37 PM CDT	Tornado Warning	ILX	McLean	23 min
Jun 26, 3:39 PM CDT	Tornado Warning	ILX	Logan, Sangamon	36 min
Jun 26, 4:04 PM CDT	Tornado Warning	ILX	DeWitt	26 min
Jun 26, 4:43 PM CDT	Severe Thunderstorm Warning	ILX	Champaign, DeWitt, McLean, Piatt	32 min
Jun 26, 5:16 PM CDT	Severe Thunderstorm Warning	ILX	Champaign, DeWitt, McLean, Piatt	44 min
Jun 26, 5:47 PM CDT	Tornado Warning	ILX	Douglas, Moultrie, Piatt	43 min
Jun 26, 5:50 PM CDT	Severe Thunderstorm Warning	ILX	Vermilion	40 min
Jun 26, 6:03 PM CDT	Tornado Warning	ILX	Champaign, Douglas	27 min
Jun 26, 6:24 PM CDT	Severe Thunderstorm Warning	ILX	Champaign, Douglas, Edgar, Vermilion	81 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.