Alert archive / Illinois / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 36, NWS Quad Cities, IA

July 9, 20214 counties in Illinois; Des Moines County, Henry County, Lee County, Iowa

NWS Quad Cities, IA issued this severe thunderstorm warning at Jul 9, 2021, 7:08 PM CDT for 4 counties in Illinois; Des Moines County, Henry County, Lee County, Iowa. It was in force for 37 min. 6 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, 7:08 PM CDT (00:08 UTC)
Expired: Jul 9, 2021, 7:45 PM CDT
In force: 37 min
Issued by: NWS Quad Cities, IA
Area: Storm-based polygon
Hail: 2.5 in
Wind: 60.0 mph

Counties Des Moines County, IA, Henry County, IA, Lee County, IA, Hancock County, IL, Henderson County, IL, McDonough County, IL, Warren County, IL

The radar

The Quad Cities radar (KDVN), 104 km from the middle of the area, began a volume at 00:08 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

Time	Report	Where	Remark
Jul 9, 7:19 PM CDT	HAIL 1	1 E West Burlington, IA
Jul 9, 7:20 PM CDT	HAIL 1.5	2 Wsw Spring Grove, IA
Jul 9, 7:22 PM CDT	HAIL 1.75	1 Wsw Burlington, IA
Jul 9, 7:24 PM CDT	HAIL 1.5	1 Sse Burlington, IA
Jul 9, 7:28 PM CDT	HAIL 2.5	1 Ese Burlington Region, IA	REPORT FROM MPING: TENNIS BALL (2.50 IN.).
Jul 9, 7:30 PM CDT	HAIL 1.5	1 Ene Burlington Region, IA	REPORT FROM MPING: PING PONG BALL (1.50 IN.).

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.

Issued	Product	Office	Lasted
Jul 9, 7:08 PM CDT	Severe Thunderstorm Watch	SPC	3 hr

The nearest sounding before it

Davenport, (KDVN), launched 00:00Z, 0.1 hours before the alert went out and 107 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: 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.

662 
WUUS53 KDVN 100008
SVRDVN
ILC067-071-109-187-IAC057-087-111-100045-
/O.NEW.KDVN.SV.W.0036.210710T0008Z-210710T0045Z/

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

The National Weather Service in the Quad Cities has issued a

* Severe Thunderstorm Warning for...
  Northeastern Hancock County in west central Illinois...
  Henderson County in west central Illinois...
  Southern Warren County in west central Illinois...
  Northern McDonough County in west central Illinois...
  Southeastern Henry County in southeastern Iowa...
  Central Des Moines County in southeastern Iowa...
  Northeastern Lee County in southeastern Iowa...

* Until 745 PM CDT.

* At 707 PM CDT, a severe thunderstorm was located over West
  Burlington, or over Burlington, 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...
  Carman and Gladstone around 720 PM CDT.
  Stronghurst and Terre Haute around 725 PM CDT.

Other locations in the path of this severe thunderstorm include
Raritan, Roseville, Good Hope and Sciota.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

This storm is producing large hail. SEEK SHELTER NOW inside a sturdy
structure and stay away from windows!

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.

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

&&

LAT...LON 4083 9152 4099 9117 4068 9046 4043 9061
TIME...MOT...LOC 0007Z 295DEG 38KT 4082 9116 

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

DC

2 follow-up statements

839 
WWUS53 KDVN 100020
SVSDVN

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

IAC087-100027-
/O.CAN.KDVN.SV.W.0036.000000T0000Z-210710T0045Z/
Henry IA-
720 PM CDT Fri Jul 9 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN HENRY 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...and southeastern Iowa.

LAT...LON 4077 9138 4095 9109 4068 9046 4043 9061
      4074 9131
TIME...MOT...LOC 0017Z 294DEG 37KT 4078 9108 

$$

ILC067-071-109-187-IAC057-111-100045-
/O.CON.KDVN.SV.W.0036.000000T0000Z-210710T0045Z/
Hancock IL-Henderson IL-Warren IL-McDonough IL-Des Moines IA-Lee IA-
720 PM CDT Fri Jul 9 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 745 PM CDT
FOR NORTHEASTERN HANCOCK...HENDERSON...SOUTHERN WARREN...NORTHERN
MCDONOUGH...SOUTHERN DES MOINES AND NORTHEASTERN LEE COUNTIES...

At 717 PM CDT, a severe thunderstorm was located over Gulf Port, or
over Burlington, moving southeast at 40 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.

Locations impacted include...
  Stronghurst, Terre Haute, Raritan, Roseville, Sciota, Good Hope, 
  Bardolph and Little Swan Lake.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

This storm is producing large hail. SEEK SHELTER NOW inside a sturdy
structure and stay away from windows.

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 4077 9138 4095 9109 4068 9046 4043 9061
      4074 9131
TIME...MOT...LOC 0017Z 294DEG 37KT 4078 9108 

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

DC

767 
WWUS53 KDVN 100028
SVSDVN

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

ILC067-071-109-187-IAC057-111-100045-
/O.CON.KDVN.SV.W.0036.000000T0000Z-210710T0045Z/
Hancock IL-Henderson IL-Warren IL-McDonough IL-Des Moines IA-Lee IA-
728 PM CDT Fri Jul 9 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 745 PM CDT
FOR NORTHEASTERN HANCOCK...SOUTHERN HENDERSON...SOUTHERN WARREN...
NORTHERN MCDONOUGH...SOUTH CENTRAL DES MOINES AND NORTHEASTERN LEE
COUNTIES...

At 728 PM CDT, a severe thunderstorm was located over Terre Haute, or
10 miles southeast of Burlington, moving southeast at 40 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...
Burlington, Macomb, West Burlington, La Harpe, Roseville,
Stronghurst, Blandinsville, Good Hope, Carman, Terre Haute, Bardolph,
Raritan, Sciota, Gulf Port, Western Illinois University, Little Swan
Lake, Iowa Army Ammunition Plant, Disco, Walnut Grove and Lomax.

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 4079 9123 4086 9094 4068 9046 4043 9061
      4074 9131
TIME...MOT...LOC 0028Z 303DEG 36KT 4070 9099 

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

Ervin

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 9, 7:19 PM CDT	Severe Thunderstorm Warning	DVN	Hancock, Henderson, McDonough	41 min
Jul 9, 7:39 PM CDT	Severe Thunderstorm Warning	DVN	Hancock, Henderson, McDonough, Warren	66 min
Jul 9, 8:57 PM CDT	Severe Thunderstorm Warning	DVN	Hancock	33 min
Jul 9, 9:23 PM CDT	Special Weather Statement	DVN	Hancock	52 min
Jul 10, 2:21 AM CDT	River Flood Warning	DVN	Hancock, McDonough	28 hr
Jul 9, 7:29 PM CDT	Severe Thunderstorm Warning	DVN	Iowa, Johnson, Keokuk, Louisa, Washington	31 min
Jul 9, 7:51 PM CDT	Severe Thunderstorm Warning	DVN	Henry, Jefferson, Keokuk, Washington	24 min
Jul 9, 8:25 PM CDT	Severe Thunderstorm Warning	DVN	Henry, Lee, Van Buren	35 min
Jul 10, 4:25 AM CDT	Special Weather Statement	DVN	Jefferson, Keokuk, Van Buren	95 min

Nearby

Severe Thunderstorm Warnings in Illinois, 2021 Severe Thunderstorm Warnings in Iowa, 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.