Alert archive / Minnesota / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 141, NWS Twin Cities, MN

December 15, 2021Dakota County, Goodhue County, Rice County, Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Dec 15, 2021, 7:48 PM CST for Dakota County, Goodhue County, Rice County, Minnesota. It was in force for 30 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: Dec 15, 2021, 7:48 PM CST (01:48 UTC)
Expired: Dec 15, 2021, 8:18 PM CST
In force: 30 min
Issued by: NWS Twin Cities, MN
Area: Storm-based polygon
Tornado: Possible
Hail: 0.75 in
Wind: 60.0 mph

Counties Dakota County, MN, Goodhue County, MN, Rice County, MN

The radar

The Minneapolis radar (KMPX), 80 km from the middle of the area, began a volume at 01:49 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
Dec 15, 7:50 PM CST	TORNADO	7 Se Kenyon, MN	TORNADO SPUN UP NEAR THE GOODHUE/DODGE COUNTY BORDER NEAR 170TH AVE AND TRACKED NORTHEAST 3.9 MILES. IT SNAPPED PINE TREES, DESTROYED THE TOP HALF OF A BARN, AND LOFTED DEBRIS WESTWARD INTO A FIELD. IT ENDED AROUND 100TH AVE SOUTH OF COUNTY 54 BLVD. MAX WIND 1
Dec 15, 7:51 PM CST	TORNADO	4 Ese Kenyon, MN	A BRIEF TORNADO SPUN UP SOUTHEAST OF KENYON AROUND 66TH AVE AND CONTINUED NORTHEAST ACROSS 480TH STREET. IT DESTROYED A FEW FARM BUILDINGS AND SNAPPED SEVERAL TREES. DEBRIS WAS LOFTED WEST ACROSS 66TH AVE. MAX WIND 95 MPH, WIDTH 75 YARDS.
Dec 15, 7:54 PM CST	TSTM WND GST 68	6 Sw Wanamingo, MN	PERSONAL WEATHER STATION.
Dec 15, 8:00 PM CST	TSTM WND DMG	10 Ese Red Wing, MN	TIME ESTIMATED BASED ON RADAR. CALLER REPORTS A LARGE, 3-SIDED, STEEL CAR PORT WAS BLOWN FROM ITS PLACE AND FLIPPED INTO HER YARD. THE STRUCTURE WAS OPEN ON THE SOUTH SIDE AND CLOSE FROM ALL OTHER DIRECTIONS.

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
Dec 15, 5:30 PM CST	Tornado Watch	SPC	6 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 00:00Z, 1.8 hours before the alert went out and 82 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: 633 J/kg
Mixed-layer CIN: -55 J/kg
Mixed-layer LCL: 770 m above ground
0-6 km bulk shear: 75 kt
0-1 km storm-relative helicity: 443 m²/s²
0-3 km storm-relative helicity: 470 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 5.7

Open this sounding in Storm Lab

The text

As transmitted.

209 
WUUS53 KMPX 160148
SVRMPX
MNC037-049-131-160230-
/O.NEW.KMPX.SV.W.0141.211216T0148Z-211216T0230Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Twin Cities/Chanhassen MN
748 PM CST Wed Dec 15 2021

The National Weather Service in the Twin Cities has issued a

* Severe Thunderstorm Warning for...
  Southern Dakota County in east central Minnesota...
  Goodhue County in southeastern Minnesota...
  Northeastern Rice County in south central Minnesota...

* Until 830 PM CST.

* At 747 PM CST, severe thunderstorms were located along a line
  extending from near Webster to Kenyon to near Dodge Center, moving
  northeast at 50 mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

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

* Severe thunderstorms will be near...
  Wanamingo around 755 PM CST.
  Pine Island around 805 PM CST.

Other locations in the path of these severe thunderstorms include
Goodhue, Welch and Red Wing.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Tornado Watch remains in effect until 1100 PM CST for south
central, southeastern and east central Minnesota...and west central
Wisconsin.

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

A Tornado Watch remains in effect until 1100 PM CST for south
central, southeastern and east central Minnesota...and west central
Wisconsin.

&&

LAT...LON 4447 9328 4455 9328 4472 9273 4464 9262
      4461 9261 4460 9256 4457 9255 4456 9234
      4446 9226 4445 9243 4437 9243 4436 9255
      4420 9256 4419 9301
TIME...MOT...LOC 0147Z 224DEG 45KT 4449 9328 4428 9299 4400 9281 

TORNADO...POSSIBLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

Dye

1 follow-up statement

430 
WWUS53 KMPX 160218
SVSMPX

Severe Weather Statement
National Weather Service Twin Cities/Chanhassen MN
818 PM CST Wed Dec 15 2021

MNC037-049-131-160228-
/O.CAN.KMPX.SV.W.0141.000000T0000Z-211216T0230Z/
Dakota MN-Goodhue MN-Rice MN-
818 PM CST Wed Dec 15 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHERN DAKOTA...GOODHUE AND
NORTHEASTERN RICE COUNTIES IS CANCELLED...
    
The storms which prompted the warning have moved out of the area.
Therefore, the warning has been cancelled.  However gusty winds are
still possible with these thunderstorms.

A Tornado Watch remains in effect until 1100 PM CST for southeastern
and east central Minnesota...and west central Wisconsin.

LAT...LON 4447 9328 4455 9328 4472 9273 4464 9262
      4461 9261 4460 9256 4457 9255 4456 9234
      4446 9226 4445 9243 4437 9243 4436 9255
      4420 9256 4419 9301
TIME...MOT...LOC 0216Z 224DEG 45KT 4475 9292 4454 9263 4426 9245 

$$

Dye

The office that day

Everything else NWS Twin Cities, MN issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Dec 15, 6:40 PM CST	Severe Thunderstorm Warning	MPX	Faribault, Freeborn	50 min
Dec 15, 6:55 PM CST	Tornado Warning	MPX	Faribault, Freeborn	35 min
Dec 15, 7:07 PM CST	Severe Thunderstorm Warning	MPX	Blue Earth, Le Sueur, Waseca	38 min
Dec 15, 7:18 PM CST	Severe Thunderstorm Warning	MPX	Rice, Steele	42 min

Nearby

Severe Thunderstorm Warnings in Minnesota, 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.