Alert archive / Illinois / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 80, NWS Lincoln, IL

July 29, 2021Richland County, Illinois

NWS Lincoln, IL issued this severe thunderstorm warning at Jul 29, 2021, 9:30 PM CDT for Richland County, Illinois. It was in force for 15 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 29, 2021, 9:30 PM CDT (02:30 UTC)
Expired: Jul 29, 2021, 9:45 PM CDT
In force: 15 min
Issued by: NWS Lincoln, IL
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

County Richland County, IL

The radar

The Evansville,IN radar (KVWX), 50 km from the middle of the area, began a volume at 02:29 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, 2.5 hours before the alert went out and 176 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: 1257 J/kg
Mixed-layer CIN: -140 J/kg
Mixed-layer LCL: 1185 m above ground
0-6 km bulk shear: 26 kt
0-1 km storm-relative helicity: -4 m²/s²
0-3 km storm-relative helicity: 88 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 4.1

Open this sounding in Storm Lab

The text

As transmitted.

619 
WUUS53 KILX 300230
SVRILX
ILC159-300245-
/O.NEW.KILX.SV.W.0080.210730T0230Z-210730T0245Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Lincoln IL
930 PM CDT Thu Jul 29 2021

The National Weather Service in Lincoln has issued a

* Severe Thunderstorm Warning for...
  Southeastern Richland County in southeastern Illinois...

* Until 945 PM CDT.

* At 929 PM CDT, a severe thunderstorm was located over Parkersburg,
  or 8 miles southeast of Olney, moving south at 20 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...
  Parkersburg around 935 PM CDT.

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 3867 8810 3867 8798 3857 8798 3857 8811
      3858 8811
TIME...MOT...LOC 0229Z 001DEG 15KT 3861 8802 

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

37

1 follow-up statement

459 
WWUS53 KILX 300246
SVSILX

Severe Weather Statement
National Weather Service Lincoln IL
946 PM CDT Thu Jul 29 2021

ILC159-300256-
/O.EXP.KILX.SV.W.0080.000000T0000Z-210730T0245Z/
Richland-
946 PM CDT Thu Jul 29 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN RICHLAND COUNTY
HAS EXPIRED...
        
The storm which prompted the warning has moved out of the area.
Therefore, the warning has been allowed to expire.  However small
hail, gusty winds and heavy rain are still possible with this
thunderstorm.

LAT...LON 3867 8810 3867 8798 3857 8798 3857 8811
      3858 8811
TIME...MOT...LOC 0246Z 001DEG 15KT 3854 8802 

$$

37

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 29, 7:28 PM CDT	Severe Thunderstorm Warning	ILX	Crawford, Lawrence	35 min
Jul 29, 8:33 PM CDT	Special Weather Statement	ILX	Lawrence	27 min
Jul 29, 8:57 PM CDT	Special Weather Statement	ILX	Lawrence	33 min
Jul 29, 9:16 PM CDT	Severe Thunderstorm Warning	ILX	Lawrence, Richland	29 min
Jul 29, 10:40 PM CDT	Special Weather Statement	ILX	Richland	35 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.