Alert archive / Iowa / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 11, NWS Quad Cities, IA

June 19, 2021Keokuk County, Washington County, Iowa

NWS Quad Cities, IA issued this severe thunderstorm warning at Jun 19, 2021, 12:02 AM CDT for Keokuk County, Washington County, Iowa. It was in force for 43 min. 1 report 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: Jun 19, 2021, 12:02 AM CDT (05:02 UTC)
Expired: Jun 19, 2021, 12:45 AM CDT
In force: 43 min
Issued by: NWS Quad Cities, IA
Area: Storm-based polygon
Hail: 1.0 in
Wind: 50.0 mph

Counties Keokuk County, IA, Washington County, IA

The radar

The Quad Cities radar (KDVN), 92 km from the middle of the area, began a volume at 05:06 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
Jun 19, 12:17 AM CDT	HAIL 1.5	4 Ne Keota, IA	REPORT AND PICTURE VIA SOCIAL MEDIA.

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
Jun 18, 10:08 PM CDT	Severe Thunderstorm Watch	SPC	8 hr

The nearest sounding before it

Davenport, (KDVN), launched 00:00Z, 5.0 hours before the alert went out and 99 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: 4 J/kg
Mixed-layer CIN: -335 J/kg
Mixed-layer LCL: 2572 m above ground
0-6 km bulk shear: 55 kt
0-1 km storm-relative helicity: -15 m²/s²
0-3 km storm-relative helicity: 55 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

796 
WUUS53 KDVN 190502
SVRDVN
IAC107-183-190545-
/O.NEW.KDVN.SV.W.0011.210619T0502Z-210619T0545Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Quad Cities IA/IL
1202 AM CDT Sat Jun 19 2021

The National Weather Service in the Quad Cities has issued a

* Severe Thunderstorm Warning for...
  Eastern Keokuk County in southeastern Iowa...
  Washington County in southeastern Iowa...

* Until 1245 AM CDT.

* At 1201 AM CDT, a severe thunderstorm was located near Harper, or 9
  miles east of Sigourney, moving east at 40 mph.

  HAZARD...Quarter size hail.

  SOURCE...Radar indicated.

  IMPACT...Damage to vehicles is expected.

* This severe thunderstorm will be near...
  Wellman around 1220 AM CDT.

Other locations in the path of this severe thunderstorm include
Washington, Kalona, Richmond and Riverside.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4151 9189 4151 9153 4150 9152 4150 9151
      4148 9150 4147 9151 4146 9150 4145 9150
      4143 9148 4128 9149 4121 9208 4139 9218
TIME...MOT...LOC 0501Z 251DEG 36KT 4133 9202 

HAIL...1.00IN
WIND...<50MPH
 
$$

Gunkel

4 follow-up statements

098 
WWUS53 KDVN 190515
SVSDVN

Severe Weather Statement
National Weather Service Quad Cities IA/IL
1215 AM CDT Sat Jun 19 2021

IAC107-190525-
/O.CAN.KDVN.SV.W.0011.000000T0000Z-210619T0545Z/
Keokuk IA-
1215 AM CDT Sat Jun 19 2021

...THE SEVERE THUNDERSTORM WARNING FOR EASTERN KEOKUK 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 500 AM CDT for
southeastern and east central Iowa.

LAT...LON 4149 9195 4151 9189 4151 9153 4150 9152
      4150 9151 4148 9150 4147 9151 4146 9150
      4145 9150 4143 9148 4128 9149 4123 9195
TIME...MOT...LOC 0515Z 251DEG 36KT 4138 9184 

$$

IAC183-190545-
/O.CON.KDVN.SV.W.0011.000000T0000Z-210619T0545Z/
Washington IA-
1215 AM CDT Sat Jun 19 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1245 AM CDT
FOR WASHINGTON COUNTY...

At 1215 AM CDT, a severe thunderstorm was located near Wellman, or 9
miles northwest of Washington, moving east at 40 mph.

HAZARD...Golf 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...
  Washington, Kalona, Richmond and Riverside.

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.

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.

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

&&

LAT...LON 4149 9195 4151 9189 4151 9153 4150 9152
      4150 9151 4148 9150 4147 9151 4146 9150
      4145 9150 4143 9148 4128 9149 4123 9195
TIME...MOT...LOC 0515Z 251DEG 36KT 4138 9184 

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

Gunkel

880 
WWUS53 KDVN 190520
SVSDVN

Severe Weather Statement
National Weather Service Quad Cities IA/IL
1220 AM CDT Sat Jun 19 2021

IAC183-190545-
/O.CON.KDVN.SV.W.0011.000000T0000Z-210619T0545Z/
Washington IA-
1220 AM CDT Sat Jun 19 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1245 AM CDT
FOR WASHINGTON COUNTY...

At 1220 AM CDT, a severe thunderstorm was located near Richmond, or 7
miles northwest of Washington, moving east at 40 mph.

HAZARD...Two inch 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...
Washington, Kalona, Wellman, Riverside, Ainsworth, Richmond, Keota,
West Chester, Haskins, Washington Airport, Washington County
Fairgrounds and Marr Park.

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.

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.

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

&&

LAT...LON 4149 9195 4151 9189 4151 9153 4150 9152
      4150 9151 4148 9150 4147 9151 4146 9150
      4145 9150 4143 9148 4128 9149 4123 9195
TIME...MOT...LOC 0520Z 251DEG 36KT 4140 9177 

HAIL...2.00IN
WIND...60MPH
 
$$

Gunkel

753 
WWUS53 KDVN 190528
SVSDVN

Severe Weather Statement
National Weather Service Quad Cities IA/IL
1228 AM CDT Sat Jun 19 2021

IAC183-190545-
/O.CON.KDVN.SV.W.0011.000000T0000Z-210619T0545Z/
Washington IA-
1228 AM CDT Sat Jun 19 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1245 AM CDT
FOR NORTHERN WASHINGTON COUNTY...

At 1227 AM CDT, a severe thunderstorm was located over Richmond, or 8
miles north of Washington, moving east at 40 mph.

HAZARD...Golf 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...
Washington, Kalona, Wellman, Riverside, Ainsworth, Richmond, West
Chester, Haskins, Washington Airport, Washington County Fairgrounds
and Marr Park.

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.

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.

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

&&

LAT...LON 4146 9188 4151 9185 4151 9153 4150 9152
      4150 9151 4148 9150 4147 9151 4146 9150
      4145 9150 4143 9148 4128 9149 4125 9181
TIME...MOT...LOC 0527Z 251DEG 36KT 4143 9167 

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

Gunkel

621 
WWUS53 KDVN 190539
SVSDVN

Severe Weather Statement
National Weather Service Quad Cities IA/IL
1239 AM CDT Sat Jun 19 2021

IAC183-190549-
/O.EXP.KDVN.SV.W.0011.000000T0000Z-210619T0545Z/
Washington IA-
1239 AM CDT Sat Jun 19 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTHERN WASHINGTON COUNTY
WILL EXPIRE AT 1245 AM CDT...
        
The storm which prompted the warning has weakened below severe
limits, and has exited the warned area. Therefore, the warning will
be allowed to expire.  However small hail is still possible with this
thunderstorm.

A Severe Thunderstorm Watch remains in effect until 500 AM CDT for
southeastern and east central Iowa.

LAT...LON 4146 9188 4151 9185 4151 9153 4150 9152
      4150 9151 4148 9150 4147 9151 4146 9150
      4145 9150 4143 9148 4128 9149 4125 9181
TIME...MOT...LOC 0539Z 251DEG 36KT 4146 9156 

$$

Gunkel

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 18, 10:17 PM CDT	Severe Thunderstorm Warning	DVN	Des Moines, Henry, Louisa, Washington	58 min
Jun 18, 11:03 PM CDT	Severe Thunderstorm Warning	DVN	Des Moines	27 min
Jun 18, 11:21 PM CDT	Severe Thunderstorm Warning	DVN	Henry, Jefferson	39 min
Jun 18, 11:29 PM CDT	Severe Thunderstorm Warning	DVN	Des Moines, Henry, Louisa	46 min
Jun 18, 11:47 PM CDT	Severe Thunderstorm Warning	DVN	Louisa, Washington	29 min
Jun 19, 12:12 AM CDT	Severe Thunderstorm Warning	DVN	Jefferson, Keokuk, Van Buren, Washington	48 min
Jun 19, 12:27 AM CDT	Severe Thunderstorm Warning	DVN	Des Moines, Louisa	27 min
Jun 19, 1:08 AM CDT	Severe Thunderstorm Warning	DVN	Lee, Van Buren	49 min
Jun 19, 1:28 AM CDT	Special Weather Statement	DVN	Louisa	2 hr
Jun 19, 2:01 AM CDT	Special Weather Statement	DVN	Lee, Van Buren	59 min
Jun 19, 4:33 AM CDT	Severe Thunderstorm Warning	DVN	Lee, Van Buren	57 min

Nearby

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.