Alert archive / Minnesota / Tornado Warnings in 2022

Tornado Warning 6, NWS Sioux Falls, SD

May 11, 2022Cottonwood County, Minnesota

NWS Sioux Falls, SD issued this tornado warning at May 11, 2022, 5:56 PM CDT for Cottonwood County, Minnesota. It was in force for 19 min. 1 report 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: May 11, 2022, 5:56 PM CDT (22:56 UTC)
Expired: May 11, 2022, 6:15 PM CDT
In force: 19 min
Issued by: NWS Sioux Falls, SD
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 0.75 in

County Cottonwood County, MN

The radar

The Sioux Falls radar (KFSD), 133 km from the middle of the area, began a volume at 22:57 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
May 11, 6:00 PM CDT	TSTM WND DMG	4 Nnw Jeffers, MN	8-10 INCH BRANCHES DOWN.

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
May 11, 1:15 PM CDT	Tornado Watch	SPC	8 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 12:00Z, 10.9 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1699 m above ground
0-6 km bulk shear: 40 kt
0-1 km storm-relative helicity: 89 m²/s²
0-3 km storm-relative helicity: 216 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.7

Open this sounding in Storm Lab

The text

As transmitted.

999 
WFUS53 KFSD 112256
TORFSD
MNC033-112315-
/O.NEW.KFSD.TO.W.0006.220511T2256Z-220511T2315Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Sioux Falls SD
556 PM CDT Wed May 11 2022

The National Weather Service in Sioux Falls has issued a

* Tornado Warning for...
  Northwestern Cottonwood County in southwestern Minnesota...

* Until 615 PM CDT.

* At 556 PM CDT, severe thunderstorms capable of producing both
  tornadoes and extensive straight line wind damage were located near
  Storden, or 20 miles northwest of Windom, moving northeast at 45
  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.

* These dangerous storms will be near...
  Jeffers around 600 PM CDT.

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.

This cluster of thunderstorms is capable of producing tornadoes and
widespread significant wind damage. Do not wait to see or hear the
tornado. For your protection move to an interior room on the lowest
floor of a building.

&&

LAT...LON 4404 9524 4412 9547 4414 9546 4420 9539
      4419 9511 4416 9510 4412 9510 4411 9509
TIME...MOT...LOC 2256Z 231DEG 38KT 4412 9532 

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

$$

Weisser

2 follow-up statements

964 
WWUS53 KFSD 112305
SVSFSD

Severe Weather Statement
National Weather Service Sioux Falls SD
605 PM CDT Wed May 11 2022

MNC033-112315-
/O.CON.KFSD.TO.W.0006.000000T0000Z-220511T2315Z/
Cottonwood MN-
605 PM CDT Wed May 11 2022

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 615 PM CDT FOR NORTH
CENTRAL COTTONWOOD COUNTY...

At 605 PM CDT, a severe squall line capable of producing both
tornadoes and extensive straight line wind damage was located near
Lamberton, or 21 miles north of Windom, moving northeast at 45 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
north central Cottonwood County.

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.

This cluster of thunderstorms is capable of producing tornadoes and
widespread significant wind damage. Do not wait to see or hear the
tornado. For your protection move to an interior room on the lowest
floor of a building.

&&

LAT...LON 4412 9522 4416 9539 4420 9539 4419 9511
      4416 9510 4412 9510 4411 9509
TIME...MOT...LOC 2305Z 231DEG 38KT 4418 9521 

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

$$

Weisser

095 
WWUS53 KFSD 112312
SVSFSD

Severe Weather Statement
National Weather Service Sioux Falls SD
612 PM CDT Wed May 11 2022

MNC033-112321-
/O.EXP.KFSD.TO.W.0006.000000T0000Z-220511T2315Z/
Cottonwood MN-
612 PM CDT Wed May 11 2022

...THE TORNADO WARNING FOR NORTH CENTRAL COTTONWOOD COUNTY WILL
EXPIRE AT 615 PM CDT...
        
The storm which prompted the warning has moved out of the area.
Therefore, the warning will be allowed to expire.  However gusty
winds and heavy rain are still possible with this thunderstorm.

A Tornado Watch remains in effect until 900 PM CDT for southwestern
Minnesota.

Remember, a Severe Thunderstorm Warning still remains in effect for
Cottonwood county until 645 pm CDT.

LAT...LON 4412 9522 4416 9539 4420 9539 4419 9511
      4416 9510 4412 9510 4411 9509
TIME...MOT...LOC 2311Z 231DEG 38KT 4422 9515 

$$

Weisser

The office that day

Everything else NWS Sioux Falls, SD issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 11, 11:44 AM CDT	Severe Thunderstorm Warning Considerable damage threat	FSD	Lyon	31 min
May 11, 12:23 PM CDT	Severe Thunderstorm Warning	FSD	Lincoln, Lyon	37 min
May 11, 12:35 PM CDT	Severe Thunderstorm Warning	FSD	Lyon	10 min
May 11, 4:07 PM CDT	Severe Thunderstorm Warning	FSD	Lincoln, Pipestone	23 min
May 11, 5:26 PM CDT	Severe Thunderstorm Warning	FSD	Cottonwood, Jackson, Murray, Nobles	49 min
May 11, 5:36 PM CDT	Tornado Warning	FSD	Cottonwood	24 min
May 11, 5:49 PM CDT	Tornado Warning	FSD	Jackson	26 min
May 11, 6:09 PM CDT	Severe Thunderstorm Warning	FSD	Cottonwood, Jackson	36 min
May 11, 6:18 PM CDT	Tornado Warning	FSD	Cottonwood, Jackson	27 min
May 11, 6:39 PM CDT	Severe Thunderstorm Warning Considerable damage threat	FSD	Cottonwood, Jackson	36 min

Nearby

Tornado Warnings in Minnesota, 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.