Alert archive / Iowa / Tornado Warnings in 2022

Tornado Warning 2, NWS La Crosse, WI

April 12, 2022Mitchell County, Iowa

NWS La Crosse, WI issued this tornado warning at Apr 12, 2022, 9:08 PM CDT for Mitchell County, Iowa. It was in force for 37 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Apr 12, 2022, 9:08 PM CDT (02:08 UTC)
Expired: Apr 12, 2022, 9:45 PM CDT
In force: 37 min
Issued by: NWS La Crosse, WI
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 1.25 in

County Mitchell County, IA

The radar

The La Crosse radar (KARX), 149 km from the middle of the area, began a volume at 02:10 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.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Apr 12, 7:54 PM CDT	Tornado Watch	SPC	4 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 00:00Z, 2.1 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 992 m above ground
0-6 km bulk shear: 62 kt
0-1 km storm-relative helicity: 710 m²/s²
0-3 km storm-relative helicity: 827 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

831 
WFUS53 KARX 130208
TORARX
IAC131-130245-
/O.NEW.KARX.TO.W.0002.220413T0208Z-220413T0245Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service La Crosse WI
908 PM CDT Tue Apr 12 2022

The National Weather Service in La Crosse has issued a

* Tornado Warning for...
  Western Mitchell County in north central Iowa...

* Until 945 PM CDT.
    
* At 908 PM CDT, a severe thunderstorm capable of producing a tornado
  was located near Manly, or 12 miles northeast of Mason City, moving
  northeast at 35 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...
  St. Ansgar around 925 PM CDT.
  Lyle around 935 PM CDT.

Other locations impacted by this tornadic thunderstorm include Mona,
County Roads A 39 And S 70, State Road 9 And County T 26,
Toeterville, Rock Creek, Osage Spring Park and Mitchell.

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.

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

&&

LAT...LON 4350 9303 4350 9282 4321 9282 4321 9302
TIME...MOT...LOC 0208Z 229DEG 29KT 4329 9306 

TORNADO...RADAR INDICATED
MAX HAIL SIZE...1.25 IN

$$

Skow

2 follow-up statements

696 
WWUS53 KARX 130230
SVSARX

Severe Weather Statement
National Weather Service La Crosse WI
930 PM CDT Tue Apr 12 2022

IAC131-130245-
/O.CON.KARX.TO.W.0002.000000T0000Z-220413T0245Z/
Mitchell IA-
930 PM CDT Tue Apr 12 2022

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 945 PM CDT FOR WESTERN
MITCHELL COUNTY...
    
At 930 PM CDT, a severe thunderstorm capable of producing a tornado
was located near Osage, moving northeast 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 tornadic thunderstorm will remain over mainly rural areas of
western Mitchell County, including the following locations... Osage
Spring Park and Mitchell.

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.

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

&&

LAT...LON 4340 9298 4350 9282 4321 9282 4321 9288
      4336 9296
TIME...MOT...LOC 0230Z 246DEG 27KT 4333 9284 

TORNADO...RADAR INDICATED
MAX HAIL SIZE...1.25 IN

$$

Skow

653 
WWUS53 KARX 130239
SVSARX

Severe Weather Statement
National Weather Service La Crosse WI
939 PM CDT Tue Apr 12 2022

IAC131-130249-
/O.EXP.KARX.TO.W.0002.000000T0000Z-220413T0245Z/
Mitchell IA-
939 PM CDT Tue Apr 12 2022

...THE TORNADO WARNING FOR WESTERN MITCHELL COUNTY WILL EXPIRE AT 945
PM 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, gusty winds and heavy rain
are still possible with this thunderstorm.

A Tornado Watch remains in effect until midnight CDT for north
central Iowa...and southeastern Minnesota.

LAT...LON 4340 9298 4350 9282 4321 9282 4321 9288
      4336 9296
TIME...MOT...LOC 0239Z 229DEG 29KT 4337 9277 

$$

Skow

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 12, 8:30 PM CDT	Severe Thunderstorm Warning Considerable damage threat	ARX	Floyd, Mitchell	60 min
Apr 12, 8:46 PM CDT	Tornado Warning	ARX	Floyd	44 min
Apr 12, 9:26 PM CDT	Severe Thunderstorm Warning Considerable damage threat	ARX	Howard, Mitchell	49 min
Apr 12, 9:56 PM CDT	Severe Thunderstorm Warning	ARX	Howard, Mitchell	49 min
Apr 12, 10:18 PM CDT	Severe Thunderstorm Warning	ARX	Mitchell	42 min
Apr 12, 10:26 PM CDT	Flash Flood Warning	ARX	Mitchell	3 hr
Apr 12, 10:30 PM CDT	Severe Thunderstorm Warning	ARX	Chickasaw, Floyd, Howard, Mitchell	60 min
Apr 12, 10:37 PM CDT	Tornado Warning	ARX	Howard, Mitchell	23 min
Apr 12, 11:07 PM CDT	Tornado Warning Tornado observed	ARX	Howard, Mitchell	23 min
Apr 12, 11:15 PM CDT	Severe Thunderstorm Warning	ARX	Chickasaw, Fayette, Howard, Winneshiek	45 min
Apr 12, 11:27 PM CDT	Tornado Warning	ARX	Howard, Winneshiek	17 min
Apr 12, 11:51 PM CDT	Severe Thunderstorm Warning	ARX	Allamakee, Winneshiek	39 min
Apr 13, 12:32 AM CDT	Special Weather Statement	ARX	Clayton	28 min
Apr 13, 2:30 PM CDT	Wind Advisory	ARX	Allamakee, Chickasaw, Clayton, Fayette, Floyd, Howard and 2 more	29 hr

Nearby

Tornado Warnings in Iowa, 2022 Every tornado warning in 2022 Tornadoes in 2022

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.