Alert archive / Iowa / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 48, NWS Quad Cities, IA

July 14, 2021Buchanan County, Delaware County, Iowa

NWS Quad Cities, IA issued this severe thunderstorm warning at Jul 14, 2021, 6:56 PM CDT for Buchanan County, Delaware County, Iowa. It was in force for 49 min. 4 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, 6:56 PM CDT (23:56 UTC)
Expired: Jul 14, 2021, 7:45 PM CDT
In force: 49 min
Issued by: NWS Quad Cities, IA
Area: Storm-based polygon
Tornado: Possible
Hail: 0.75 in
Wind: 60.0 mph

Counties Buchanan County, IA, Delaware County, IA

The radar

The Quad Cities radar (KDVN), 129 km from the middle of the area, began a volume at 23:58 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, 7:05 PM CDT	FUNNEL CLOUD	1.3 Sw Aurora, IA	REPORTED VIA EM.
Jul 14, 7:10 PM CDT	TORNADO	3 Sse Aurora, IA	BRIEF TOUCHDOWN IN A FIELD WITH NO VISIBLE DAMAGE.
Jul 14, 7:52 PM CDT	TORNADO	3 Ssw Manchester Airpor, IA	TORNADO REPORTED ON THE GROUND SOUTH OF HIGHWAY 20 SOUTHWEST OF MANCHESTER.
Jul 14, 7:53 PM CDT	TORNADO	1 Sw Manchester, IA	DELAWARE COUNTY EMA RELAYED LIKELY TORNADO DAMAGE REPORT OF A DAMAGED CONVENIENCE STORE AND POWER LINES DOWN ON SOUTHWEST SIDE OF MANCHESTER.

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
Jul 14, 6:13 PM CDT	Tornado Watch	SPC	6 hr

The nearest sounding before it

Davenport, (KDVN), launched 12:00Z, 11.9 hours before the alert went out and 133 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.

497 
WUUS53 KDVN 142356
SVRDVN
IAC019-055-150045-
/O.NEW.KDVN.SV.W.0048.210714T2356Z-210715T0045Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Quad Cities IA/IL
656 PM CDT Wed Jul 14 2021

The National Weather Service in the Quad Cities has issued a

* Severe Thunderstorm Warning for...
  Buchanan County in northeastern Iowa...
  Western Delaware County in northeastern Iowa...

* Until 745 PM CDT.

* At 656 PM CDT, severe thunderstorms were located along a line
  extending from Stanley to near Rowley, moving east at 35 mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

  IMPACT...Expect damage to roofs, siding, and trees.

* Severe thunderstorms will be near...
  Aurora around 705 PM CDT.
  Quasqueton and Lamont around 710 PM CDT.

Other locations in the path of these severe thunderstorms include
Dundee, Manchester, Edgewood and Greeley.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Tornado Watch remains in effect until 900 PM CDT for northeastern
Iowa. A Tornado Watch also remains in effect until midnight CDT for
northeastern Iowa.

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

Large hail and damaging winds and continuous cloud to ground
lightning is occurring with these storms. 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 these storms, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 4264 9128 4230 9157 4230 9194 4264 9187
TIME...MOT...LOC 2356Z 274DEG 29KT 4264 9181 4230 9190 

TORNADO...POSSIBLE
HAIL...<.75IN
WIND...60MPH
 
$$

Uttech

3 follow-up statements

578 
WWUS53 KDVN 150006
SVSDVN

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

IAC019-055-150045-
/O.CON.KDVN.SV.W.0048.000000T0000Z-210715T0045Z/
Buchanan IA-Delaware IA-
706 PM CDT Wed Jul 14 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 745 PM CDT
FOR BUCHANAN AND WESTERN DELAWARE COUNTIES...

At 705 PM CDT, severe thunderstorms were located along a line
extending from Aurora to Walker, moving east at 35 mph.

HAZARD...60 mph wind gusts and quarter size hail.

SOURCE...Radar indicated.

IMPACT...Hail damage to vehicles is expected. Expect wind damage to 
         roofs, siding, and trees.

These severe storms will be near...
  Lamont around 715 PM CDT.

Other locations in the path of these severe thunderstorms include
Dundee, Manchester, Edgewood and Greeley.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Tornado Watch remains in effect until 900 PM CDT for northeastern
Iowa. A Tornado Watch also remains in effect until midnight CDT for
northeastern Iowa.

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

Continuous cloud to ground lightning is occurring with these storms.
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 these storms, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 4264 9128 4230 9157 4230 9194 4264 9187
TIME...MOT...LOC 0005Z 274DEG 29KT 4264 9172 4230 9182 

TORNADO...POSSIBLE
HAIL...1.00IN
WIND...60MPH
 
$$

DC

373 
WWUS53 KDVN 150016
SVSDVN

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

IAC019-055-150045-
/O.CON.KDVN.SV.W.0048.000000T0000Z-210715T0045Z/
Buchanan IA-Delaware IA-
716 PM CDT Wed Jul 14 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 745 PM CDT
FOR BUCHANAN AND WESTERN DELAWARE COUNTIES...

At 716 PM CDT, severe thunderstorms were located along a line
extending from near Lamont to Troy Mills, moving east at 35 mph.

HAZARD...60 mph wind gusts and quarter size hail.

SOURCE...Radar indicated.

IMPACT...Hail damage to vehicles is expected. Expect wind damage to 
         roofs, siding, and trees.

These severe storms will be near...
  Dundee around 720 PM CDT.

Other locations in the path of these severe thunderstorms include
Manchester, Edgewood and Greeley.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Tornado Watch remains in effect until 900 PM CDT for northeastern
Iowa. A Tornado Watch also remains in effect until midnight CDT for
northeastern Iowa.

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

Continuous cloud to ground lightning is occurring with these storms.
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 these storms, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 4264 9128 4230 9157 4230 9194 4264 9187
TIME...MOT...LOC 0016Z 274DEG 29KT 4263 9161 4229 9170 

TORNADO...POSSIBLE
HAIL...1.00IN
WIND...60MPH
 
$$

DC

511 
WWUS53 KDVN 150023
SVSDVN

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

IAC019-055-150045-
/O.CON.KDVN.SV.W.0048.000000T0000Z-210715T0045Z/
Buchanan IA-Delaware IA-
723 PM CDT Wed Jul 14 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 745 PM CDT
FOR NORTHEASTERN BUCHANAN AND NORTHWESTERN DELAWARE COUNTIES...

At 723 PM CDT, severe thunderstorms were located along a line
extending from near Dundee to near Troy Mills, moving east at 35 mph.

HAZARD...60 mph wind gusts and quarter size hail.

SOURCE...Radar indicated.

IMPACT...Hail damage to vehicles is expected. Expect wind damage to 
         roofs, siding, and trees.

These severe storms will be near...
  Edgewood around 735 PM CDT.

Other locations in the path of these severe thunderstorms include
Greeley.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Tornado Watch remains in effect until 900 PM CDT for northeastern
Iowa. A Tornado Watch also remains in effect until midnight CDT for
northeastern Iowa.

Continuous cloud to ground lightning is occurring with these storms.
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 these storms, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 4264 9128 4239 9153 4242 9185 4264 9172
TIME...MOT...LOC 0023Z 274DEG 29KT 4263 9154 4229 9163 

TORNADO...POSSIBLE
HAIL...1.00IN
WIND...60MPH
 
$$

DC

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, 6:58 PM CDT	Tornado Warning	DVN	Benton	47 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.