Alert archive / Iowa / Tornado Warnings in 2021

Tornado Warning 8, NWS Quad Cities, IA

July 14, 2021Benton County, Iowa

NWS Quad Cities, IA issued this tornado warning at Jul 14, 2021, 6:58 PM CDT for Benton County, Iowa. It was in force for 47 min. 3 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 14, 2021, 6:58 PM CDT (23:58 UTC)
Expired: Jul 14, 2021, 7:45 PM CDT
In force: 47 min
Issued by: NWS Quad Cities, IA
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 0.75 in

County Benton County, IA

The radar

The Des Moines radar (KDMX), 135 km from the middle of the area, began a volume at 00:05 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 14, 7:14 PM CDT	TORNADO	8 W Garrison, IA	DELAYED REPORT. RECEIVED VIDEO OF A TORNADO CROSSING INTO BENTON COUNTY. SAME TORNADO THAT HIT DYSART.
Jul 14, 7:20 PM CDT	TORNADO	1 N Garrison, IA	BENTON COUNTY EMA RELAYED PUBLIC REPORT OF A BRIEF TORNADO TOUCHDOWN ALONG 18TH AVENUE 1 MILE NORTH OF GARRISON.
Jul 14, 7:36 PM CDT	TORNADO	2 E Garrison, IA	BENTON COUNTY EMA RELAYED A PUBLIC REPORT OF A BRIEF TORNADO TOUCH DOWN NORTH OF 61ST STREET BETWEEN GARRISON AND VINTON.

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 14, 2:35 PM CDT	Tornado Watch	SPC	8 hr

The nearest sounding before it

Davenport, (KDVN), launched 12:00Z, 12.0 hours before the alert went out and 153 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: 573 J/kg
Mixed-layer CIN: -62 J/kg
Mixed-layer LCL: 1106 m above ground
0-6 km bulk shear: 34 kt
0-1 km storm-relative helicity: 108 m²/s²
0-3 km storm-relative helicity: 139 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.1

Open this sounding in Storm Lab

The text

As transmitted.

145 
WFUS53 KDVN 142358
TORDVN
IAC011-150045-
/O.NEW.KDVN.TO.W.0008.210714T2358Z-210715T0045Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Quad Cities IA/IL
658 PM CDT Wed Jul 14 2021

The National Weather Service in the Quad Cities has issued a

* Tornado Warning for...
  Northwestern Benton County in east central Iowa...

* Until 745 PM CDT.
    
* At 658 PM CDT, a severe thunderstorm capable of producing a tornado
  was located over Dysart, or 16 miles west of Vinton, moving east at
  35 mph.

  HAZARD...Tornado.

  SOURCE...Radar indicated rotation.

  IMPACT...Flying debris will be dangerous to those caught without 
           shelter. Mobile homes will be damaged or destroyed. 
           Damage to roofs, windows, and vehicles will occur.  Tree 
           damage is likely.

* This dangerous storm will be near...
  Garrison around 715 PM CDT.

Other locations in the path of this tornadic thunderstorm include
Vinton.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.

&&

LAT...LON 4223 9230 4223 9201 4208 9208 4210 9230
TIME...MOT...LOC 2358Z 272DEG 29KT 4216 9234 

TORNADO...RADAR INDICATED
HAIL...<.75IN

$$

Uttech

4 follow-up statements

021 
WWUS53 KDVN 150010
SVSDVN

Severe Weather Statement
National Weather Service Quad Cities IA/IL
710 PM CDT Wed Jul 14 2021

IAC011-150045-
/O.CON.KDVN.TO.W.0008.000000T0000Z-210715T0045Z/
Benton IA-
710 PM CDT Wed Jul 14 2021

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 745 PM CDT FOR
NORTHWESTERN BENTON COUNTY...
    
At 710 PM CDT, a severe thunderstorm capable of producing a tornado
was located over Dysart, or 12 miles west of Vinton, moving east at
25 mph.

HAZARD...Tornado.

SOURCE...Radar indicated rotation.

IMPACT...Flying debris will be dangerous to those caught without 
         shelter. Mobile homes will be damaged or destroyed. Damage 
         to roofs, windows, and vehicles will occur.  Tree damage is 
         likely.

Locations impacted include...
  Garrison and Vinton.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.

&&

LAT...LON 4223 9230 4223 9201 4208 9208 4210 9230
TIME...MOT...LOC 0010Z 269DEG 22KT 4216 9228 

TORNADO...RADAR INDICATED
HAIL...<.75IN

$$

Uttech

670 
WWUS53 KDVN 150014
SVSDVN

Severe Weather Statement
National Weather Service Quad Cities IA/IL
714 PM CDT Wed Jul 14 2021

IAC011-150045-
/O.CON.KDVN.TO.W.0008.000000T0000Z-210715T0045Z/
Benton IA-
714 PM CDT Wed Jul 14 2021

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 745 PM CDT FOR
NORTHWESTERN BENTON COUNTY...
    
At 714 PM CDT, a confirmed tornado was located near Dysart, or 11
miles west of Vinton, moving east at 25 mph.

HAZARD...Damaging tornado.

SOURCE...Weather spotters confirmed tornado.

IMPACT...Flying debris will be dangerous to those caught without 
         shelter. Mobile homes will be damaged or destroyed. Damage 
         to roofs, windows, and vehicles will occur.  Tree damage is 
         likely.

This tornado will be near...
  Garrison around 730 PM CDT.

Other locations in the path of this tornadic thunderstorm include
Vinton.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

To repeat, a tornado is on the ground. TAKE COVER NOW! Move to a
basement or an interior room on the lowest floor of a sturdy
building. Avoid windows. If you are outdoors, in a mobile home, or in
a vehicle, move to the closest substantial shelter and protect
yourself from flying debris.

&&

LAT...LON 4223 9230 4223 9201 4208 9208 4210 9230
TIME...MOT...LOC 0014Z 266DEG 22KT 4217 9225 

TORNADO...OBSERVED
HAIL...<.75IN

$$

Uttech

784 
WWUS53 KDVN 150024
SVSDVN

Severe Weather Statement
National Weather Service Quad Cities IA/IL
724 PM CDT Wed Jul 14 2021

IAC011-150045-
/O.CON.KDVN.TO.W.0008.000000T0000Z-210715T0045Z/
Benton IA-
724 PM CDT Wed Jul 14 2021

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 745 PM CDT FOR
NORTHWESTERN BENTON COUNTY...
    
At 723 PM CDT, a confirmed tornado was located 1 mile north of 
Garrison, or 7 miles west of Vinton, moving east at 25 mph.

HAZARD...Damaging tornado.

SOURCE...Weather spotters confirmed tornado.

IMPACT...Flying debris will be dangerous to those caught without 
         shelter. Mobile homes will be damaged or destroyed. Damage 
         to roofs, windows, and vehicles will occur.  Tree damage is 
         likely.

Locations impacted include...
  Vinton.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

To repeat, a tornado is on the ground. TAKE COVER NOW! Move to a
basement or an interior room on the lowest floor of a sturdy
building. Avoid windows. If you are outdoors, in a mobile home, or in
a vehicle, move to the closest substantial shelter and protect
yourself from flying debris.

&&

LAT...LON 4223 9230 4223 9201 4208 9208 4210 9230
TIME...MOT...LOC 0023Z 264DEG 22KT 4218 9217 

TORNADO...OBSERVED
HAIL...<.75IN

$$

Uttech

378 
WWUS53 KDVN 150032
SVSDVN

Severe Weather Statement
National Weather Service Quad Cities IA/IL
732 PM CDT Wed Jul 14 2021

IAC011-150045-
/O.CON.KDVN.TO.W.0008.000000T0000Z-210715T0045Z/
Benton IA-
732 PM CDT Wed Jul 14 2021

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 745 PM CDT FOR
NORTHWESTERN BENTON COUNTY...
    
At 732 PM CDT, a severe thunderstorm capable of producing a tornado
was located over Garrison, or near Vinton, moving east at 25 mph.

HAZARD...Tornado.

SOURCE...Radar indicated rotation.

IMPACT...Flying debris will be dangerous to those caught without 
         shelter. Mobile homes will be damaged or destroyed. Damage 
         to roofs, windows, and vehicles will occur.  Tree damage is 
         likely.

Locations impacted include...
  Vinton.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.

&&

LAT...LON 4223 9223 4223 9201 4208 9208 4209 9221
TIME...MOT...LOC 0032Z 265DEG 21KT 4218 9214 

TORNADO...RADAR INDICATED
HAIL...<.75IN

$$

Uttech

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 14, 5:38 AM CDT	Special Weather Statement	DVN	Buchanan	37 min
Jul 14, 9:32 AM CDT	Special Weather Statement	DVN	Keokuk	28 min
Jul 14, 10:02 AM CDT	Special Weather Statement	DVN	Benton, Iowa, Jefferson, Keokuk, Washington	28 min
Jul 14, 10:28 AM CDT	Special Weather Statement	DVN	Benton, Buchanan, Henry, Iowa, Jefferson, Johnson and 1 more	32 min
Jul 14, 10:58 AM CDT	Special Weather Statement	DVN	Delaware, Johnson, Linn, Louisa, Washington	32 min
Jul 14, 11:31 AM CDT	Special Weather Statement	DVN	Cedar, Clinton, Dubuque, Jackson, Jones, Scott	29 min
Jul 14, 11:40 AM CDT	Severe Thunderstorm Warning	DVN	Delaware, Dubuque, Jackson	35 min
Jul 14, 12:15 PM CDT	Special Weather Statement	DVN	Clinton, Dubuque, Jackson	30 min
Jul 14, 12:35 PM CDT	Severe Thunderstorm Warning	DVN	Dubuque, Jackson	40 min
Jul 14, 1:07 PM CDT	Special Weather Statement	DVN	Scott	38 min
Jul 14, 6:04 PM CDT	Severe Thunderstorm Warning	DVN	Buchanan	41 min
Jul 14, 6:25 PM CDT	Tornado Warning	DVN	Buchanan	50 min
Jul 14, 6:32 PM CDT	Severe Thunderstorm Warning	DVN	Benton, Buchanan	43 min
Jul 14, 6:56 PM CDT	Severe Thunderstorm Warning	DVN	Buchanan, Delaware	49 min

Nearby

Tornado Warnings in Iowa, 2021 Every tornado warning in 2021 Tornadoes 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.