Alert archive / Illinois / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 100, NWS Lincoln, IL

August 25, 2021Fulton County, Knox County, Illinois

NWS Lincoln, IL issued this severe thunderstorm warning at Aug 25, 2021, 4:51 PM CDT for Fulton County, Knox County, Illinois. It was in force for 24 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 25, 2021, 4:51 PM CDT (21:51 UTC)
Expired: Aug 25, 2021, 5:15 PM CDT
In force: 24 min
Issued by: NWS Lincoln, IL
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Fulton County, IL, Knox County, IL

The radar

The Quad Cities radar (KDVN), 94 km from the middle of the area, began a volume at 21:51 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

Davenport, (KDVN), launched 12:00Z, 9.9 hours before the alert went out and 93 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: 818 J/kg
Mixed-layer CIN: -238 J/kg
Mixed-layer LCL: 1355 m above ground
0-6 km bulk shear: 6 kt
0-1 km storm-relative helicity: -32 m²/s²
0-3 km storm-relative helicity: -10 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.2

Open this sounding in Storm Lab

The text

As transmitted.

225 
WUUS53 KILX 252151
SVRILX
ILC057-095-252215-
/O.NEW.KILX.SV.W.0100.210825T2151Z-210825T2215Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Lincoln IL
451 PM CDT Wed Aug 25 2021

The National Weather Service in Lincoln has issued a

* Severe Thunderstorm Warning for...
  Northwestern Fulton County in west central Illinois...
  Southwestern Knox County in west central Illinois...

* Until 515 PM CDT.

* At 451 PM CDT, a severe thunderstorm was located over Abingdon, or
  10 miles south of Galesburg, moving east at 15 mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

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

* This severe thunderstorm will be near...
  Abingdon around 505 PM CDT.

Other locations in the path of this severe thunderstorm include
London Mills.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4089 9014 4062 9022 4069 9044 4090 9044
TIME...MOT...LOC 2151Z 276DEG 11KT 4081 9044 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

MJA

1 follow-up statement

731 
WWUS53 KILX 252207
SVSILX

Severe Weather Statement
National Weather Service Lincoln IL
507 PM CDT Wed Aug 25 2021

ILC057-095-252217-
/O.EXP.KILX.SV.W.0100.000000T0000Z-210825T2215Z/
Fulton-Knox-
507 PM CDT Wed Aug 25 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN FULTON AND
SOUTHWESTERN KNOX COUNTIES WILL EXPIRE AT 515 PM CDT...
                
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning will be allowed to expire.  However gusty
winds are still possible with this thunderstorm.

LAT...LON 4089 9014 4062 9022 4069 9044 4090 9044
TIME...MOT...LOC 2207Z 270DEG 11KT 4081 9038 

$$

MJA

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 24, 7:26 PM CDT	Special Weather Statement	ILX	Knox, Stark	64 min
Aug 24, 8:00 PM CDT	Special Weather Statement	ILX	Knox, Marshall, Peoria, Stark	60 min
Aug 24, 8:28 PM CDT	Special Weather Statement	ILX	Peoria, Tazewell, Woodford	47 min
Aug 24, 8:43 PM CDT	Severe Thunderstorm Warning	ILX	Fulton, McLean, Mason, Peoria, Tazewell, Woodford	47 min
Aug 24, 9:10 PM CDT	Special Weather Statement	ILX	DeWitt, Logan, McLean	50 min
Aug 24, 9:45 PM CDT	Special Weather Statement	ILX	DeWitt, Macon, Menard, Piatt, Sangamon	30 min
Aug 24, 10:18 PM CDT	Special Weather Statement	ILX	Christian, Macon, Moultrie, Piatt	57 min
Aug 24, 10:36 PM CDT	Special Weather Statement	ILX	Champaign, Vermilion	54 min
Aug 24, 11:05 PM CDT	Special Weather Statement	ILX	Christian, Coles, Douglas, Moultrie, Shelby	40 min
Aug 25, 4:10 PM CDT	Severe Thunderstorm Warning Considerable damage threat	ILX	Knox	50 min
Aug 25, 4:15 PM CDT	Special Weather Statement	ILX	Edgar	45 min
Aug 25, 4:33 PM CDT	Special Weather Statement	ILX	Vermilion	42 min
Aug 25, 4:42 PM CDT	Severe Thunderstorm Warning	ILX	Stark	33 min
Aug 25, 5:22 PM CDT	Special Weather Statement	ILX	Peoria	53 min
Aug 25, 6:11 PM CDT	Severe Thunderstorm Warning	ILX	Peoria, Tazewell	34 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.