Alert archive / Iowa / Tornado Warnings in 2021

Tornado Warning 17, NWS Quad Cities, IA

July 14, 2021Jones County, Iowa

NWS Quad Cities, IA issued this tornado warning at Jul 14, 2021, 10:02 PM CDT for Jones County, Iowa. It was in force for 43 min. 2 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, 10:02 PM CDT (03:02 UTC)
Expired: Jul 14, 2021, 10:45 PM CDT
In force: 43 min
Issued by: NWS Quad Cities, IA
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 0.75 in

County Jones County, IA

The radar

The Quad Cities radar (KDVN), 77 km from the middle of the area, began a volume at 03:05 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, 10:02 PM CDT	TORNADO	2 Sse Monticello Munici, IA	AN EF-1 TORNADO DEVELOPED SOUTHEAST OF MONTICELLO AND TRACKED ACROSS RURAL AREAS EAST OF MONTICELLO ALONG AN INTERMITTENT 8 MILE PATH THROUGH FARMLAND AND WOODED AREAS.
Jul 14, 10:30 PM CDT	TORNADO	3 Wsw Canton, IA	AN EF-1 TORNADO TRACKED ACROSS RURAL JONES COUNTY SNAPPING TREES AND ENDING JUST SOUTH OF CANTON.

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, 6:13 PM CDT	Tornado Watch	SPC	6 hr

The nearest sounding before it

Davenport, (KDVN), launched 00:00Z, 3.0 hours before the alert went out and 80 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: 2569 J/kg
Mixed-layer CIN: -10 J/kg
Mixed-layer LCL: 832 m above ground
0-6 km bulk shear: 38 kt
0-1 km storm-relative helicity: 253 m²/s²
0-3 km storm-relative helicity: 346 m²/s²
Significant tornado parameter: 3.2
Supercell composite: 23.4

Open this sounding in Storm Lab

The text

As transmitted.

361 
WFUS53 KDVN 150302
TORDVN
IAC105-150345-
/O.NEW.KDVN.TO.W.0017.210715T0302Z-210715T0345Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Quad Cities IA/IL
1002 PM CDT Wed Jul 14 2021

The National Weather Service in the Quad Cities has issued a

* Tornado Warning for...
  Northeastern Jones County in east central Iowa...

* Until 1045 PM CDT.
    
* At 1002 PM CDT, a severe thunderstorm capable of producing a
  tornado was located near Monticello, or 10 miles northeast of
  Anamosa, moving east at 30 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...
  Cascade around 1015 PM CDT.

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

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.

Heavy rainfall may hide this tornado. Do not wait to see or hear the
tornado. TAKE COVER NOW!

Tornadoes are extremely difficult to see and confirm at night. Do not
wait to see or hear the tornado. TAKE COVER NOW!

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

&&

LAT...LON 4214 9090 4219 9122 4227 9122 4230 9103
      4230 9090
TIME...MOT...LOC 0302Z 268DEG 25KT 4221 9114 

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

$$

Gibbs

5 follow-up statements

128 
WWUS53 KDVN 150307
SVSDVN

Severe Weather Statement
National Weather Service Quad Cities IA/IL
1007 PM CDT Wed Jul 14 2021

IAC105-150345-
/O.CON.KDVN.TO.W.0017.000000T0000Z-210715T0345Z/
Jones IA-
1007 PM CDT Wed Jul 14 2021

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 1045 PM CDT FOR
NORTHEASTERN JONES COUNTY...
        
At 1007 PM CDT, a confirmed tornado was located near Monticello, or
12 miles northeast of Anamosa, moving east at 30 mph.

HAZARD...Damaging tornado.

SOURCE...Radar 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...
  Cascade around 1020 PM CDT.

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

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.

Heavy rainfall may hide this tornado. Do not wait to see or hear the
tornado. TAKE COVER NOW!

Tornadoes are extremely difficult to see and confirm at night. Do not
wait to see or hear the tornado. TAKE COVER NOW!

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

&&

LAT...LON 4214 9090 4219 9122 4227 9122 4230 9103
      4230 9090
TIME...MOT...LOC 0307Z 262DEG 25KT 4223 9109 

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

$$

Gibbs

421 
WWUS53 KDVN 150314
SVSDVN

Severe Weather Statement
National Weather Service Quad Cities IA/IL
1014 PM CDT Wed Jul 14 2021

IAC105-150345-
/O.CON.KDVN.TO.W.0017.000000T0000Z-210715T0345Z/
Jones IA-
1014 PM CDT Wed Jul 14 2021

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 1045 PM CDT FOR
NORTHEASTERN JONES COUNTY...
        
At 1014 PM CDT, a confirmed tornado was located near Cascade, or 14
miles northeast of Anamosa, moving northeast at 25 mph.

HAZARD...Damaging tornado.

SOURCE...Radar 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...
  Cascade around 1025 PM CDT.

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.

Heavy rainfall may hide this tornado. Do not wait to see or hear the
tornado. TAKE COVER NOW!

Tornadoes are extremely difficult to see and confirm at night. Do not
wait to see or hear the tornado. TAKE COVER NOW!

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

&&

LAT...LON 4221 9090 4221 9111 4226 9112 4230 9103
      4230 9090
TIME...MOT...LOC 0314Z 246DEG 20KT 4224 9106 

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

$$

Gibbs

401 
WWUS53 KDVN 150319
SVSDVN

Severe Weather Statement
National Weather Service Quad Cities IA/IL
1019 PM CDT Wed Jul 14 2021

IAC105-150345-
/O.CON.KDVN.TO.W.0017.000000T0000Z-210715T0345Z/
Jones IA-
1019 PM CDT Wed Jul 14 2021

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 1045 PM CDT FOR
NORTHEASTERN JONES COUNTY...
    
At 1019 PM CDT, a severe thunderstorm capable of producing a tornado
was located near Cascade, or 16 miles northeast of Anamosa, moving
northeast 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.

This tornadic thunderstorm will remain over mainly rural areas of
northeastern Jones County, including the following locations...
Temple Hill.

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.

Heavy rainfall may hide this tornado. Do not wait to see or hear the
tornado. TAKE COVER NOW!

Tornadoes are extremely difficult to see and confirm at night. Do not
wait to see or hear the tornado. TAKE COVER NOW!

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

&&

LAT...LON 4222 9090 4222 9106 4226 9107 4228 9099
      4230 9090
TIME...MOT...LOC 0319Z 246DEG 20KT 4225 9103 

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

$$

Gibbs

118 
WWUS53 KDVN 150331
SVSDVN

Severe Weather Statement
National Weather Service Quad Cities IA/IL
1031 PM CDT Wed Jul 14 2021

IAC105-150345-
/O.CON.KDVN.TO.W.0017.000000T0000Z-210715T0345Z/
Jones IA-
1031 PM CDT Wed Jul 14 2021

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 1045 PM CDT FOR
NORTHEASTERN JONES COUNTY...
    
At 1031 PM CDT, a severe thunderstorm capable of producing a tornado
was located near Cascade, or 18 miles northwest of Maquoketa, moving
east at 30 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...
Temple Hill.

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.

Heavy rainfall may hide this tornado. Do not wait to see or hear the
tornado. TAKE COVER NOW!

Tornadoes are extremely difficult to see and confirm at night. Do not
wait to see or hear the tornado. TAKE COVER NOW!

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

&&

LAT...LON 4223 9090 4223 9099 4226 9100 4228 9099
      4229 9090
TIME...MOT...LOC 0331Z 268DEG 25KT 4225 9091 

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

$$

Gibbs

308 
WWUS53 KDVN 150337
SVSDVN

Severe Weather Statement
National Weather Service Quad Cities IA/IL
1037 PM CDT Wed Jul 14 2021

IAC105-150346-
/O.EXP.KDVN.TO.W.0017.000000T0000Z-210715T0345Z/
Jones IA-
1037 PM CDT Wed Jul 14 2021

...THE TORNADO WARNING FOR NORTHEASTERN JONES COUNTY WILL EXPIRE AT
1045 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 Tornado Watch remains in effect until midnight CDT for east central
Iowa.

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 4223 9090 4223 9099 4226 9100 4228 9099
      4229 9090
TIME...MOT...LOC 0336Z 268DEG 25KT 4225 9087 

$$

Gibbs

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 14, 7:28 PM CDT	Tornado Warning	DVN	Buchanan, Delaware	17 min
Jul 14, 7:37 PM CDT	Severe Thunderstorm Warning	DVN	Benton, Linn	38 min
Jul 14, 7:40 PM CDT	Severe Thunderstorm Warning	DVN	Buchanan, Delaware	35 min
Jul 14, 7:43 PM CDT	Tornado Warning	DVN	Benton	32 min
Jul 14, 7:43 PM CDT	Tornado Warning	DVN	Buchanan, Delaware	32 min
Jul 14, 7:53 PM CDT	Tornado Warning	DVN	Benton	27 min
Jul 14, 8:11 PM CDT	Severe Thunderstorm Warning	DVN	Delaware, Dubuque	19 min
Jul 14, 8:14 PM CDT	Severe Thunderstorm Warning	DVN	Benton, Linn	46 min
Jul 14, 8:19 PM CDT	Tornado Warning	DVN	Benton, Linn	22 min
Jul 14, 8:31 PM CDT	Tornado Warning	DVN	Benton, Linn	29 min
Jul 14, 8:56 PM CDT	Tornado Warning	DVN	Delaware, Linn	49 min
Jul 14, 9:08 PM CDT	Severe Thunderstorm Warning	DVN	Benton, Iowa	32 min
Jul 14, 9:29 PM CDT	Tornado Warning	DVN	Delaware, Jones	46 min
Jul 14, 10:14 PM CDT	Severe Thunderstorm Warning	DVN	Cedar, Johnson, Jones, Linn	46 min
Jul 14, 10:34 PM CDT	Tornado Warning	DVN	Cedar	26 min
Jul 14, 10:41 PM CDT	Severe Thunderstorm Warning	DVN	Jackson	49 min
Jul 14, 10:52 PM CDT	Severe Thunderstorm Warning	DVN	Cedar, Clinton, Jones, Scott	38 min
Jul 14, 11:10 PM CDT	Severe Thunderstorm Warning	DVN	Clinton, Jackson	50 min
Jul 15, 8:58 AM CDT	Special Weather Statement	DVN	Henry, Jefferson	47 min
Jul 15, 5:23 PM CDT	Special Weather Statement	DVN	Clinton	37 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.