Alert archive / Iowa / Tornado Warnings in 2021

Tornado Warning 4, NWS La Crosse, WI

July 14, 2021Fayette County, Iowa

NWS La Crosse, WI issued this tornado warning at Jul 14, 2021, 6:00 PM CDT for Fayette County, Iowa. It was in force for 45 min. 5 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, 6:00 PM CDT (23:00 UTC)
Expired: Jul 14, 2021, 6:45 PM CDT
In force: 45 min
Issued by: NWS La Crosse, WI
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 1.25 in

County Fayette County, IA

The radar

The La Crosse radar (KARX), 139 km from the middle of the area, began a volume at 23:01 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, 6:23 PM CDT	TSTM WND DMG	Oelwein, IA	REPORTS OF BUILDING DAMAGE AROUND TOWN
Jul 14, 6:23 PM CDT	TSTM WND DMG	Oelwein, IA	REPORTS OF BUILDING DAMAGE AROUND TOWN.
Jul 14, 6:40 PM CDT	TORNADO	3 Sw Oelwein, IA	EF0 WITH 3 MILE PATH LENGTH WITH MAX WIDTH OF 30 YARDS AND ESTIMATED SPEED OF 70 MPH. MOSTLY CROP DAMAGE, BUT SOME LIGHT TREE AND HOUSE DAMAGE IN OELWEIN.
Jul 14, 6:40 PM CDT	TORNADO	3 Nw Hazleton, IA	START LOCATION OF OELWEIN TORNADO IN BUCHANAN COUNTY. NOT A NEW TRACK.
Jul 14, 6:50 PM CDT	TSTM WND DMG	2 Nnw Hazleton, IA	BLOWN OVER CORN DAMAGE ALONG AND MAINLY EAST OF HWY 150 TOWARDS DELAWARE COUNTY. TIME ESTIMATED FROM RADAR.

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, 11.0 hours before the alert went out and 171 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.

354 
WFUS53 KARX 142300
TORARX
IAC065-142345-
/O.NEW.KARX.TO.W.0004.210714T2300Z-210714T2345Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service La Crosse WI
600 PM CDT Wed Jul 14 2021

The National Weather Service in La Crosse has issued a

* Tornado Warning for...
  Southwestern Fayette County in northeastern Iowa...

* Until 645 PM CDT.
    
* At 559 PM CDT, a severe thunderstorm capable of producing a tornado
  was located 7 miles east of Denver, or 14 miles west of Oelwein,
  moving east at 30 mph.

  HAZARD...Tornado and half dollar size hail.

  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...
  Fairbank around 615 PM CDT.
  Oelwein and Maynard around 630 PM CDT.
  Stanley around 640 PM CDT.

Other locations impacted by this tornadic thunderstorm include County
Roads 3 And W 13, Westgate and County Roads 3 And W 33.

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 4264 9208 4279 9208 4283 9181 4264 9181
TIME...MOT...LOC 2259Z 268DEG 26KT 4268 9219 

TORNADO...RADAR INDICATED
HAIL...1.25IN

$$

Rieck

2 follow-up statements

532 
WWUS53 KARX 142321
SVSARX

Severe Weather Statement
National Weather Service La Crosse WI
621 PM CDT Wed Jul 14 2021

IAC065-142345-
/O.CON.KARX.TO.W.0004.000000T0000Z-210714T2345Z/
Fayette IA-
621 PM CDT Wed Jul 14 2021

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 645 PM CDT FOR
SOUTHWESTERN FAYETTE COUNTY...
    
At 621 PM CDT, a severe thunderstorm capable of producing a tornado
was located near Fairbank, or near Oelwein, moving east at 25 mph.

HAZARD...Tornado and quarter size hail.

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...
  Oelwein around 630 PM CDT.
  Maynard around 635 PM CDT.
  Stanley around 645 PM CDT.

Other locations impacted by this tornadic thunderstorm include County
Roads 3 And W 13, Westgate and County Roads 3 And W 33.

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 4264 9208 4279 9208 4283 9181 4264 9181
TIME...MOT...LOC 2321Z 264DEG 23KT 4269 9201 

TORNADO...RADAR INDICATED
HAIL...1.00IN

$$

Rieck

479 
WWUS53 KARX 142342
SVSARX

Severe Weather Statement
National Weather Service La Crosse WI
642 PM CDT Wed Jul 14 2021

IAC065-142351-
/O.EXP.KARX.TO.W.0004.000000T0000Z-210714T2345Z/
Fayette IA-
642 PM CDT Wed Jul 14 2021

...THE TORNADO WARNING FOR SOUTHWESTERN FAYETTE COUNTY WILL EXPIRE AT
645 PM CDT...
                
The storm which prompted the warning has weakened below severe
limits, and no longer appears capable of producing a tornado.
Therefore, the warning will be allowed to expire.

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

LAT...LON 4264 9208 4279 9208 4283 9181 4264 9181
TIME...MOT...LOC 2341Z 268DEG 26KT 4269 9181 

$$

Rieck

The office that day

Everything else NWS La Crosse, WI issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 14, 5:43 AM CDT	Special Weather Statement	ARX	Fayette	62 min
Jul 14, 6:23 AM CDT	Special Weather Statement	ARX	Fayette	67 min
Jul 14, 6:55 AM CDT	Special Weather Statement	ARX	Clayton	65 min
Jul 14, 9:06 AM CDT	Severe Thunderstorm Warning	ARX	Floyd	39 min
Jul 14, 5:33 PM CDT	Tornado Warning	ARX	Floyd	42 min
Jul 14, 6:09 PM CDT	Tornado Warning Tornado observed	ARX	Chickasaw, Floyd	52 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.