Alert archive / Illinois / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 94, NWS Lincoln, IL

August 23, 2021Schuyler County, Illinois

NWS Lincoln, IL issued this severe thunderstorm warning at Aug 23, 2021, 1:08 PM CDT for Schuyler County, Illinois. It was in force for 37 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
Aug 23, 2021, 1:08 PM CDT (18:08 UTC)
Expired
Aug 23, 2021, 1:45 PM CDT
In force
37 min
Issued by
NWS Lincoln, IL
Area
Storm-based polygon
Hail
1.0 in
Wind
60.0 mph

County Schuyler County, IL

The radar

The Lincoln radar (KILX), 106 km from the middle of the area, began a volume at 18:17 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 12:00Z, 6.1 hours before the alert went out and 168 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 12:00Z on 2021-08-23Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Lincoln, IL at 12:00Z on 2021-08-23The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 118 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1261 m above ground
0-6 km bulk shear
18 kt
0-1 km storm-relative helicity
118 m²/s²
0-3 km storm-relative helicity
87 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

081 
WUUS53 KILX 231808
SVRILX
ILC169-231845-
/O.NEW.KILX.SV.W.0094.210823T1808Z-210823T1845Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Lincoln IL
108 PM CDT Mon Aug 23 2021

The National Weather Service in Lincoln has issued a

* Severe Thunderstorm Warning for...
  South central Schuyler County in west central Illinois...

* Until 145 PM CDT.

* At 108 PM CDT, a severe thunderstorm was located near Rushville,
  moving southeast at 15 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...
  Beardstown.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Large hail and damaging winds and continuous cloud to ground
lightning is occurring with this storm. Move indoors immediately.
Lightning is one of nature's leading killers. Remember, if you can
hear thunder, you are close enough to be struck by lightning.

&&

LAT...LON 4017 9066 4012 9038 4008 9039 4006 9043
      4002 9043 3998 9052 3998 9060 4000 9060
      4002 9062 4003 9061 4003 9065 4005 9068
      4008 9067 4009 9071
TIME...MOT...LOC 1808Z 293DEG 13KT 4007 9061 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

SB
1 follow-up statement
302 
WWUS53 KILX 231848
SVSILX

Severe Weather Statement
National Weather Service Lincoln IL
148 PM CDT Mon Aug 23 2021

ILC169-231858-
/O.EXP.KILX.SV.W.0094.000000T0000Z-210823T1845Z/
Schuyler-
148 PM CDT Mon Aug 23 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTH CENTRAL SCHUYLER COUNTY
HAS EXPIRED...
        
The storm which prompted the warning has moved out of the area.
Therefore, the warning has been allowed to expire.

LAT...LON 4017 9066 4012 9038 4008 9039 4006 9043
      4002 9043 3998 9052 3998 9060 4000 9060
      4002 9062 4003 9061 4003 9065 4005 9068
      4008 9067 4009 9071
TIME...MOT...LOC 1848Z 293DEG 13KT 4001 9044 

$$

SB

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 23, 3:51 AM CDTDense Fog AdvisoryILXChampaign, Christian, Clark, Clay, Coles, Crawford and 15 more4 hr
Aug 23, 12:49 PM CDTSpecial Weather StatementILXSchuyler26 min
Aug 23, 1:26 PM CDTSevere Thunderstorm WarningILXCass, Morgan, Schuyler34 min
Aug 23, 1:47 PM CDTSevere Thunderstorm WarningILXCass, Morgan43 min
Aug 23, 2:29 PM CDTSpecial Weather StatementILXSangamon46 min
Aug 23, 2:53 PM CDTHeat AdvisoryILXCass, Champaign, Christian, Clark, Clay, Coles and 29 more5 days

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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.