Alert archive / Illinois / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 39, NWS Quad Cities, IA

July 9, 20214 counties in Illinois

NWS Quad Cities, IA issued this severe thunderstorm warning at Jul 9, 2021, 7:39 PM CDT for 4 counties in Illinois. It was in force for 66 min. 8 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued
Jul 9, 2021, 7:39 PM CDT (00:39 UTC)
Expired
Jul 9, 2021, 8:45 PM CDT
In force
66 min
Issued by
NWS Quad Cities, IA
Area
Storm-based polygon
Hail
2.5 in
Wind
60.0 mph

Counties Hancock County, IL, Henderson County, IL, McDonough County, IL, Warren County, IL

The radar

The Quad Cities radar (KDVN), 136 km from the middle of the area, began a volume at 00:40 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.

What was reported inside it

TimeReportWhereRemark
Jul 9, 7:53 PM CDTHAIL 32 N Fountain Green, ILBROADCAST MEDIA RELAYED A REPORT OF 3.0 INCH HAIL 2 MILES NORTH OF FOUNTAIN GREEN. CROPS WERE DESTROYED WITH DAMAGE TO A BUILDING. TIME WAS ESTIMATED USING RADAR.
Jul 9, 8:06 PM CDTHAIL 13 Ssw Blandinsville, ILREPORT FROM MPING: QUARTER (1.00 IN.).
Jul 9, 8:06 PM CDTHAIL 14 E Fountain Green, ILMPING REPORT.
Jul 9, 8:06 PM CDTHAIL 1.253 Ene Bentley, ILLASTED OVER 2 MINUTES.
Jul 9, 8:16 PM CDTHAIL 2.51 N Plymouth, ILGOLF BALL TO TENNIS BALL SIZE HAIL.
Jul 9, 8:20 PM CDTTSTM WND DMGPlymouth, ILBRANCHES DOWN...ESTIMATED 6 INCHES IN DIAMETER.
Jul 9, 8:20 PM CDTHAIL 1.75Plymouth, ILQUARTER TO GOLF BALL SIZE HAIL.
Jul 9, 8:23 PM CDTHAIL 1Augusta, ILHEAVY RAIN TOO.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
Jul 9, 7:08 PM CDTSevere Thunderstorm WatchSPC3 hr

The nearest sounding before it

Davenport, (KDVN), launched 00:00Z, 0.7 hours before the alert went out and 139 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 00:00Z on 2021-07-10Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Davenport, at 00:00Z on 2021-07-10The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 19 square meters per square second.19395878Sfc1 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
1111 m above ground
0-6 km bulk shear
50 kt
0-1 km storm-relative helicity
19 m²/s²
0-3 km storm-relative helicity
114 m²/s²
Significant tornado parameter
0.0
Supercell composite
-0.0

Open this sounding in Storm Lab

The text

As transmitted.

388 
WUUS53 KDVN 100039
SVRDVN
ILC067-071-109-187-100145-
/O.NEW.KDVN.SV.W.0039.210710T0039Z-210710T0145Z/

BULLETIN - EAS ACTIVATION REQUESTED
Severe Thunderstorm Warning
National Weather Service Quad Cities IA/IL
739 PM CDT Fri Jul 9 2021

The National Weather Service in the Quad Cities has issued a

* Severe Thunderstorm Warning for...
  Hancock County in west central Illinois...
  Southern Henderson County in west central Illinois...
  Southern Warren County in west central Illinois...
  McDonough County in west central Illinois...

* Until 845 PM CDT.

* At 739 PM CDT, a severe thunderstorm was located near Disco, or 12
  miles northeast of Carthage, moving southeast at 45 mph.

  HAZARD...Tennis ball size hail and 60 mph wind gusts.

  SOURCE...Radar indicated.

  IMPACT...People and animals outdoors will be injured. Expect hail 
           damage to roofs, siding, windows, and vehicles. Expect 
           wind damage to roofs, siding, and trees.

* This severe thunderstorm will be near...
  Blandinsville around 745 PM CDT.

Other locations in the path of this severe thunderstorm include
Colchester, Tennessee, Colmar and Fandon.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

This is a dangerous storm. Prepare immediately for large destructive
hail capable of producing significant damage. People outside should
move to shelter inside a strong building,  and stay away from
windows.

&&

LAT...LON 4020 9127 4061 9126 4065 9115 4072 9104
      4068 9045 4028 9045 4028 9091 4019 9091
TIME...MOT...LOC 0039Z 327DEG 39KT 4057 9104 

HAIL...2.50IN
WIND...60MPH
 
$$

Ervin
8 follow-up statements
919 
WWUS53 KDVN 100047
SVSDVN

Severe Weather Statement
National Weather Service Quad Cities IA/IL
747 PM CDT Fri Jul 9 2021

ILC067-071-109-187-100145-
/O.CON.KDVN.SV.W.0039.000000T0000Z-210710T0145Z/
Hancock IL-Henderson IL-Warren IL-McDonough IL-
747 PM CDT Fri Jul 9 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 845 PM CDT
FOR HANCOCK...SOUTHERN HENDERSON...SOUTHERN WARREN AND MCDONOUGH
COUNTIES...

At 747 PM CDT, a severe thunderstorm was located near La Harpe, or 10
miles northeast of Carthage, moving southeast at 45 mph.

HAZARD...Golf ball size hail and 60 mph wind gusts.

SOURCE...Trained weather spotters.

IMPACT...People and animals outdoors will be injured. Expect hail 
         damage to roofs, siding, windows, and vehicles. Expect wind 
         damage to roofs, siding, and trees.

Locations impacted include...
  Colchester, Tennessee, Colmar and Fandon.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

This is a dangerous storm. Prepare immediately for large destructive
hail capable of producing significant damage. People outside should
move to a shelter, inside a strong building and away from windows.

&&

LAT...LON 4020 9127 4061 9126 4065 9115 4072 9104
      4068 9045 4028 9045 4028 9091 4019 9091
TIME...MOT...LOC 0047Z 327DEG 39KT 4050 9098 

TORNADO...POSSIBLE
HAIL...1.75IN
WIND...60MPH
 
$$

Ervin
227 
WWUS53 KDVN 100103
SVSDVN

Severe Weather Statement
National Weather Service Quad Cities IA/IL
803 PM CDT Fri Jul 9 2021

ILC071-100113-
/O.CAN.KDVN.SV.W.0039.000000T0000Z-210710T0145Z/
Henderson IL-
803 PM CDT Fri Jul 9 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHERN HENDERSON COUNTY IS
CANCELLED...
    
The severe thunderstorm which prompted the warning has moved out of 
the warned area.  Therefore, the warning has been cancelled.

A Severe Thunderstorm Watch remains in effect until midnight CDT for
west central Illinois.

LAT...LON 4021 9118 4038 9120 4056 9100 4064 9082
      4064 9079 4065 9079 4069 9070 4068 9045
      4028 9045 4028 9091 4019 9091
TIME...MOT...LOC 0103Z 325DEG 27KT 4043 9092 

$$

ILC067-109-187-100145-
/O.CON.KDVN.SV.W.0039.000000T0000Z-210710T0145Z/
Hancock IL-Warren IL-McDonough IL-
803 PM CDT Fri Jul 9 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 845 PM CDT
FOR SOUTHEASTERN HANCOCK...SOUTHERN WARREN AND MCDONOUGH COUNTIES...

At 803 PM CDT, a severe thunderstorm was located near Tennessee, or
11 miles east of Carthage, moving southeast at 30 mph.

HAZARD...Golf ball size hail and 60 mph wind gusts.

SOURCE...Trained weather spotters.

IMPACT...People and animals outdoors will be injured. Expect hail 
         damage to roofs, siding, windows, and vehicles. Expect wind 
         damage to roofs, siding, and trees.

Locations impacted include...
Macomb, Carthage, Bushnell, Colchester, Blandinsville, Augusta,
Bowen, Industry, Good Hope, Prairie City, Bardolph, West Point,
Tennessee, Sciota, Western Illinois University, Fandon, Little Swan
Lake, New Philadelphia, Colmar and Adair.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

This is a dangerous storm. Prepare immediately for large destructive
hail capable of producing significant damage. People outside should
move to a shelter, inside a strong building and away from windows.

&&

LAT...LON 4021 9118 4038 9120 4056 9100 4064 9082
      4064 9079 4065 9079 4069 9070 4068 9045
      4028 9045 4028 9091 4019 9091
TIME...MOT...LOC 0103Z 325DEG 27KT 4043 9092 

TORNADO...POSSIBLE
HAIL...1.75IN
WIND...60MPH
 
$$

Ervin
791 
WWUS53 KDVN 100108
SVSDVN

Severe Weather Statement
National Weather Service Quad Cities IA/IL
808 PM CDT Fri Jul 9 2021

ILC067-109-187-100145-
/O.CON.KDVN.SV.W.0039.000000T0000Z-210710T0145Z/
Hancock IL-Warren IL-McDonough IL-
808 PM CDT Fri Jul 9 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 845 PM CDT
FOR SOUTHEASTERN HANCOCK...SOUTHEASTERN WARREN AND MCDONOUGH
COUNTIES...

At 808 PM CDT, a severe thunderstorm was located over Colmar, or 12
miles southwest of Macomb, moving southeast at 45 mph.

HAZARD...Tennis ball size hail and 60 mph wind gusts.

SOURCE...Trained weather spotters.

IMPACT...People and animals outdoors will be injured. Expect hail 
         damage to roofs, siding, windows, and vehicles. Expect wind 
         damage to roofs, siding, and trees.

Locations impacted include...
Macomb, Bushnell, Colchester, Blandinsville, Augusta, Bowen,
Industry, Good Hope, Prairie City, Bardolph, Tennessee, Sciota,
Western Illinois University, Fandon, New Philadelphia, Colmar, Adair,
Walnut Grove, Plymouth and Denver.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

This is a dangerous storm. Prepare immediately for large destructive
hail capable of producing significant damage. People outside should
move to a shelter, inside a strong building and away from windows.

Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 4021 9117 4039 9114 4052 9096 4060 9070
      4068 9045 4028 9045 4028 9091 4019 9091
TIME...MOT...LOC 0108Z 327DEG 39KT 4038 9088 

TORNADO...POSSIBLE
HAIL...2.50IN
WIND...60MPH
 
$$

Ervin
409 
WWUS53 KDVN 100117
SVSDVN

Severe Weather Statement
National Weather Service Quad Cities IA/IL
817 PM CDT Fri Jul 9 2021

ILC187-100126-
/O.CAN.KDVN.SV.W.0039.000000T0000Z-210710T0145Z/
Warren IL-
817 PM CDT Fri Jul 9 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN WARREN COUNTY IS
CANCELLED...
    
The severe thunderstorm which prompted the warning has moved out of 
the warned area.  Therefore, the warning has been cancelled.

A Severe Thunderstorm Watch remains in effect until midnight CDT for
west central Illinois.

LAT...LON 4021 9117 4039 9114 4046 9090 4063 9051
      4063 9046 4028 9045 4028 9091 4019 9091
TIME...MOT...LOC 0116Z 327DEG 39KT 4030 9081 

$$

ILC067-109-100145-
/O.CON.KDVN.SV.W.0039.000000T0000Z-210710T0145Z/
Hancock IL-McDonough IL-
817 PM CDT Fri Jul 9 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 845 PM CDT
FOR SOUTHEASTERN HANCOCK AND MCDONOUGH COUNTIES...

At 816 PM CDT, a severe thunderstorm was located near Colmar, or 13
miles southwest of Macomb, moving southeast at 45 mph.

HAZARD...Tennis ball size hail and 60 mph wind gusts.

SOURCE...Trained weather spotters.

IMPACT...People and animals outdoors will be injured. Expect hail 
         damage to roofs, siding, windows, and vehicles. Expect wind 
         damage to roofs, siding, and trees.

Locations impacted include...
Macomb, Bushnell, Colchester, Augusta, Bowen, Industry, Good Hope,
Prairie City, Bardolph, Tennessee, Western Illinois University,
Fandon, New Philadelphia, Colmar, Adair, Plymouth, Denver, Bentley,
Macomb Municipal Airport and Prairie City Airport.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

This is a dangerous storm. Prepare immediately for large destructive
hail capable of producing significant damage. People outside should
move to a shelter, inside a strong building and away from windows.

Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 4021 9117 4039 9114 4046 9090 4063 9051
      4063 9046 4028 9045 4028 9091 4019 9091
TIME...MOT...LOC 0116Z 327DEG 39KT 4030 9081 

TORNADO...POSSIBLE
HAIL...2.50IN
WIND...60MPH
 
$$

Ervin
651 
WWUS53 KDVN 100120
SVSDVN

Severe Weather Statement
National Weather Service Quad Cities IA/IL
820 PM CDT Fri Jul 9 2021

ILC067-109-100145-
/O.CON.KDVN.SV.W.0039.000000T0000Z-210710T0145Z/
Hancock IL-McDonough IL-
820 PM CDT Fri Jul 9 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 845 PM CDT
FOR SOUTHEASTERN HANCOCK AND SOUTHERN MCDONOUGH COUNTIES...

At 820 PM CDT, a severe thunderstorm was located 7 miles south of
Fandon, or 14 miles northwest of Rushville, moving southeast at 45
mph.

HAZARD...Tennis ball size hail and 60 mph wind gusts.

SOURCE...Trained weather spotters.

IMPACT...People and animals outdoors will be injured. Expect hail 
         damage to roofs, siding, windows, and vehicles. Expect wind 
         damage to roofs, siding, and trees.

Locations impacted include...
Colchester, Augusta, Bowen, Industry, Tennessee, Fandon, Colmar,
Plymouth, Denver, Bentley, Pennington Point, Doddsville and Hancock
County Fairgrounds.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

This is a dangerous storm. Prepare immediately for large destructive
hail capable of producing significant damage. People outside should
move to a shelter, inside a strong building and away from windows.

Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 4021 9117 4039 9114 4043 9087 4044 9058
      4039 9045 4028 9045 4028 9091 4019 9091
TIME...MOT...LOC 0120Z 327DEG 39KT 4026 9078 

TORNADO...POSSIBLE
HAIL...2.50IN
WIND...60MPH
 
$$

Ervin
963 
WWUS53 KDVN 100128
SVSDVN

Severe Weather Statement
National Weather Service Quad Cities IA/IL
828 PM CDT Fri Jul 9 2021

ILC067-109-100145-
/O.CON.KDVN.SV.W.0039.000000T0000Z-210710T0145Z/
Hancock IL-McDonough IL-
828 PM CDT Fri Jul 9 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 845 PM CDT
FOR SOUTHEASTERN HANCOCK AND SOUTHWESTERN MCDONOUGH COUNTIES...

At 828 PM CDT, a severe thunderstorm was located over Augusta, or 17
miles southeast of Carthage, moving south at 30 mph.

HAZARD...Golf ball size hail and 60 mph wind gusts.

SOURCE...Trained weather spotters.

IMPACT...People and animals outdoors will be injured. Expect hail 
         damage to roofs, siding, windows, and vehicles. Expect wind 
         damage to roofs, siding, and trees.

Locations impacted include...
Augusta, Bowen, Colmar, Plymouth, Denver, Doddsville and Hancock
County Fairgrounds.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

This is a dangerous storm. Prepare immediately for large destructive
hail capable of producing significant damage. People outside should
move to a shelter, inside a strong building and away from windows.

Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 4021 9117 4037 9103 4035 9089 4037 9073
      4028 9064 4028 9091 4019 9091
TIME...MOT...LOC 0128Z 352DEG 26KT 4024 9090 

HAIL...1.75IN
WIND...60MPH
 
$$

Ervin
642 
WWUS53 KDVN 100135
SVSDVN

Severe Weather Statement
National Weather Service Quad Cities IA/IL
835 PM CDT Fri Jul 9 2021

ILC067-109-100145-
/O.CON.KDVN.SV.W.0039.000000T0000Z-210710T0145Z/
Hancock IL-McDonough IL-
835 PM CDT Fri Jul 9 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 845 PM CDT
FOR SOUTHEASTERN HANCOCK AND SOUTHWESTERN MCDONOUGH COUNTIES...

At 835 PM CDT, a severe thunderstorm was located near Augusta, or 18
miles west of Rushville, moving south at 30 mph.

HAZARD...Golf ball size hail and 60 mph wind gusts.

SOURCE...Trained weather spotters.

IMPACT...People and animals outdoors will be injured. Expect hail 
         damage to roofs, siding, windows, and vehicles. Expect wind 
         damage to roofs, siding, and trees.

Locations impacted include...
Augusta, Bowen, Colmar, Plymouth, Doddsville and Hancock County
Fairgrounds.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

This is a dangerous storm. Prepare immediately for large destructive
hail capable of producing significant damage. People outside should
move to a shelter, inside a strong building and away from windows.

Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 4021 9117 4029 9103 4035 9089 4033 9075
      4028 9064 4028 9091 4019 9091
TIME...MOT...LOC 0135Z 352DEG 26KT 4019 9090 

HAIL...1.75IN
WIND...60MPH
 
$$

Ervin
060 
WWUS53 KDVN 100139
SVSDVN

Severe Weather Statement
National Weather Service Quad Cities IA/IL
839 PM CDT Fri Jul 9 2021

ILC067-109-100149-
/O.EXP.KDVN.SV.W.0039.000000T0000Z-210710T0145Z/
Hancock IL-McDonough IL-
839 PM CDT Fri Jul 9 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN HANCOCK AND
SOUTHWESTERN MCDONOUGH COUNTIES WILL EXPIRE AT 845 PM CDT...
        
The storm which prompted the warning has moved out of the area.
Therefore, the warning will be allowed to expire.  However heavy rain
is still possible with this thunderstorm.

A Severe Thunderstorm Watch remains in effect until midnight CDT for
west central Illinois.

To report severe weather, contact your nearest law enforcement
agency. They will relay your report to the National Weather Service
the Quad Cities.

LAT...LON 4021 9117 4029 9103 4035 9089 4033 9075
      4028 9064 4028 9091 4019 9091
TIME...MOT...LOC 0139Z 327DEG 39KT 4017 9088 

$$

Ervin

The office that day

Everything else NWS Quad Cities, IA issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jul 9, 7:08 PM CDTSevere Thunderstorm WarningDVNHancock, Henderson, McDonough, Warren37 min
Jul 9, 7:19 PM CDTSevere Thunderstorm WarningDVNHancock, Henderson, McDonough41 min
Jul 9, 8:57 PM CDTSevere Thunderstorm WarningDVNHancock33 min
Jul 9, 9:23 PM CDTSpecial Weather StatementDVNHancock52 min
Jul 10, 2:21 AM CDTRiver Flood WarningDVNHancock, McDonough28 hr

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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.