Alert archive / Illinois / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 77, NWS Lincoln, IL

July 24, 2021Vermilion County, Illinois

NWS Lincoln, IL issued this severe thunderstorm warning at Jul 24, 2021, 8:36 PM CDT for Vermilion County, Illinois. It was in force for 39 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: Jul 24, 2021, 8:36 PM CDT (01:36 UTC)
Expired: Jul 24, 2021, 9:15 PM CDT
In force: 39 min
Issued by: NWS Lincoln, IL
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

County Vermilion County, IL

The radar

The Indianapolis radar (KIND), 140 km from the middle of the area, began a volume at 01:39 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 nearest sounding before it

Lincoln, IL (KILX), launched 00:00Z, 1.6 hours before the alert went out and 80 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: 2275 J/kg
Mixed-layer CIN: -31 J/kg
Mixed-layer LCL: 1261 m above ground
0-6 km bulk shear: 28 kt
0-1 km storm-relative helicity: 160 m²/s²
0-3 km storm-relative helicity: 262 m²/s²
Significant tornado parameter: 1.1
Supercell composite: 13.1

Open this sounding in Storm Lab

The text

As transmitted.

662 
WUUS53 KILX 250136
SVRILX
ILC183-250215-
/O.NEW.KILX.SV.W.0077.210725T0136Z-210725T0215Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Lincoln IL
836 PM CDT Sat Jul 24 2021

The National Weather Service in Lincoln has issued a

* Severe Thunderstorm Warning for...
  Northeastern Vermilion County in east central Illinois...

* Until 915 PM CDT.

* At 836 PM CDT, severe thunderstorms were located along a line
  extending from near Claytonville to near Templeton, moving south at
  25 mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

  IMPACT...Expect damage to roofs, siding, and trees.

* Severe thunderstorms will be near...
  Hoopeston around 855 PM CDT.

Other locations in the path of these severe thunderstorms include
Rossville.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4026 8775 4049 8789 4049 8753 4024 8753
TIME...MOT...LOC 0136Z 337DEG 21KT 4053 8785 4056 8715 

HAIL...<.75IN
WIND...60MPH
 
$$

Deubelbeiss

2 follow-up statements

422 
WWUS53 KILX 250200
SVSILX

Severe Weather Statement
National Weather Service Lincoln IL
900 PM CDT Sat Jul 24 2021

ILC183-250215-
/O.CON.KILX.SV.W.0077.000000T0000Z-210725T0215Z/
Vermilion-
900 PM CDT Sat Jul 24 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 915 PM CDT
FOR NORTHEASTERN VERMILION COUNTY...

At 900 PM CDT, severe thunderstorms were located along a line
extending from near Cissna Park to 7 miles east of Rossville, moving
southeast at 30 mph.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

IMPACT...Expect damage to roofs, siding, and trees.

Locations impacted include...
  Hoopeston and Rossville.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4026 8775 4049 8789 4049 8753 4024 8753
TIME...MOT...LOC 0200Z 318DEG 24KT 4053 8787 4038 8753 

HAIL...<.75IN
WIND...60MPH
 
$$

Deubelbeiss

344 
WWUS53 KILX 250213
SVSILX

Severe Weather Statement
National Weather Service Lincoln IL
913 PM CDT Sat Jul 24 2021

ILC183-250223-
/O.EXP.KILX.SV.W.0077.000000T0000Z-210725T0215Z/
Vermilion-
913 PM CDT Sat Jul 24 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN VERMILION COUNTY
WILL EXPIRE AT 915 PM CDT...
    
The storms which prompted the warning have moved out of the area.
Therefore, the warning will be allowed to expire.  However 
additional thunderstorms may move across the area in the next hour 
and gusty winds are still possible with these thunderstorms.

LAT...LON 4026 8775 4049 8789 4049 8753 4024 8753
TIME...MOT...LOC 0213Z 337DEG 21KT 4047 8784 4032 8750 

$$

Deubelbeiss

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 24, 7:05 PM CDT	Special Weather Statement	ILX	Tazewell	25 min
Jul 24, 7:28 PM CDT	Special Weather Statement	ILX	Tazewell	32 min
Jul 24, 9:04 PM CDT	Special Weather Statement	ILX	Schuyler	26 min
Jul 24, 9:45 PM CDT	Special Weather Statement	ILX	Vermilion	30 min
Jul 25, 3:05 AM CDT	Special Weather Statement	ILX	Crawford	40 min
Jul 25, 6:56 AM CDT	Areal Flood Advisory	ILX	Clay, Richland	3 hr

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.