Alert archive / Illinois / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 99, NWS Lincoln, IL

August 25, 2021Stark County, Illinois

NWS Lincoln, IL issued this severe thunderstorm warning at Aug 25, 2021, 4:42 PM CDT for Stark County, Illinois. It was in force for 33 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, 4:42 PM CDT (21:42 UTC)
Expired
Aug 25, 2021, 5:15 PM CDT
In force
33 min
Issued by
NWS Lincoln, IL
Area
Storm-based polygon
Hail
1.0 in
Wind
60.0 mph

County Stark County, IL

The radar

The Quad Cities radar (KDVN), 87 km from the middle of the area, began a volume at 21:45 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, 9.7 hours before the alert went out and 82 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, Davenport, at 12:00Z on 2021-08-25Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 818 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, Davenport, at 12:00Z on 2021-08-25The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -32 square meters per square second.1939Sfc1 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
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.

786 
WUUS53 KILX 252142
SVRILX
ILC175-252215-
/O.NEW.KILX.SV.W.0099.210825T2142Z-210825T2215Z/

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

The National Weather Service in Lincoln has issued a

* Severe Thunderstorm Warning for...
  Stark County in north central Illinois...

* Until 515 PM CDT.

* At 442 PM CDT, severe thunderstorms were located along a line
  extending from near Kewanee to near La Fayette to near Altona,
  moving east 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.

* Severe thunderstorms will be near...
  Elmira around 450 PM CDT.
  Osceola around 455 PM CDT.

Other locations in the path of these severe thunderstorms include
West Jersey, Wyoming, Toulon, Bradford and Castleton.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4123 8964 4097 8964 4097 8978 4098 8978
      4098 8999 4115 8998 4115 8987 4123 8986
TIME...MOT...LOC 2142Z 272DEG 18KT 4121 8988 4114 9000 4110 9012 

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

$$

MJA
2 follow-up statements
122 
WWUS53 KILX 252159
SVSILX

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

ILC175-252215-
/O.CON.KILX.SV.W.0099.000000T0000Z-210825T2215Z/
Stark-
459 PM CDT Wed Aug 25 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 515 PM CDT
FOR STARK COUNTY...

At 459 PM CDT, severe thunderstorms were located along a line
extending from Osceola to near Toulon to near La Fayette, moving east
at 20 mph.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

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

Locations impacted include...
  Osceola, Elmira, Toulon, Bradford, Wyoming and Castleton.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4123 8964 4097 8964 4097 8978 4098 8978
      4098 8999 4115 8998 4115 8987 4123 8986
TIME...MOT...LOC 2159Z 272DEG 18KT 4121 8979 4114 8991 4110 9003 

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

$$

MJA
617 
WWUS53 KILX 252214
SVSILX

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

ILC175-252224-
/O.EXP.KILX.SV.W.0099.000000T0000Z-210825T2215Z/
Stark-
514 PM CDT Wed Aug 25 2021

...THE SEVERE THUNDERSTORM WARNING FOR STARK COUNTY WILL EXPIRE AT
515 PM CDT...
            
The storms which prompted the warning have weakened below severe
limits, and no longer pose an immediate threat to life or property.
Therefore, the warning will be allowed to expire.  However gusty
winds are still possible with these thunderstorms.

LAT...LON 4123 8964 4097 8964 4097 8978 4098 8978
      4098 8999 4115 8998 4115 8987 4123 8986
TIME...MOT...LOC 2214Z 272DEG 18KT 4121 8979 4114 8991 4110 9003 

$$

MJA

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 24, 7:26 PM CDTSpecial Weather StatementILXKnox, Stark64 min
Aug 24, 8:00 PM CDTSpecial Weather StatementILXKnox, Marshall, Peoria, Stark60 min
Aug 24, 8:28 PM CDTSpecial Weather StatementILXPeoria, Tazewell, Woodford47 min
Aug 24, 8:43 PM CDTSevere Thunderstorm WarningILXFulton, McLean, Mason, Peoria, Tazewell, Woodford47 min
Aug 24, 9:10 PM CDTSpecial Weather StatementILXDeWitt, Logan, McLean50 min
Aug 24, 9:45 PM CDTSpecial Weather StatementILXDeWitt, Macon, Menard, Piatt, Sangamon30 min
Aug 24, 10:18 PM CDTSpecial Weather StatementILXChristian, Macon, Moultrie, Piatt57 min
Aug 24, 10:36 PM CDTSpecial Weather StatementILXChampaign, Vermilion54 min
Aug 24, 11:05 PM CDTSpecial Weather StatementILXChristian, Coles, Douglas, Moultrie, Shelby40 min
Aug 25, 4:10 PM CDTSevere Thunderstorm Warning Considerable damage threatILXKnox50 min
Aug 25, 4:15 PM CDTSpecial Weather StatementILXEdgar45 min
Aug 25, 4:33 PM CDTSpecial Weather StatementILXVermilion42 min
Aug 25, 4:51 PM CDTSevere Thunderstorm WarningILXFulton, Knox24 min
Aug 25, 5:22 PM CDTSpecial Weather StatementILXPeoria53 min
Aug 25, 6:11 PM CDTSevere Thunderstorm WarningILXPeoria, Tazewell34 min

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.