Alert archive / Minnesota / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 27, NWS Twin Cities, MN

June 11, 2021Chippewa County, Stevens County, Swift County, Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Jun 11, 2021, 5:55 AM CDT for Chippewa County, Stevens County, Swift County, Minnesota. It was in force for 50 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: Jun 11, 2021, 5:55 AM CDT (10:55 UTC)
Expired: Jun 11, 2021, 6:45 AM CDT
In force: 50 min
Issued by: NWS Twin Cities, MN
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Chippewa County, MN, Stevens County, MN, Swift County, MN

The radar

The Aberdeen radar (KABR), 187 km from the middle of the area, began a volume at 10:56 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 nearest sounding before it

Aberdeen, SD (KABR), launched 00:00Z, 10.9 hours before the alert went out and 194 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: 1337 J/kg
Mixed-layer CIN: -37 J/kg
Mixed-layer LCL: 2725 m above ground
0-6 km bulk shear: 26 kt
0-1 km storm-relative helicity: 42 m²/s²
0-3 km storm-relative helicity: 91 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.7

Open this sounding in Storm Lab

The text

As transmitted.

641 
WUUS53 KMPX 111055
SVRMPX
MNC023-149-151-111145-
/O.NEW.KMPX.SV.W.0027.210611T1055Z-210611T1145Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Twin Cities/Chanhassen MN
555 AM CDT Fri Jun 11 2021

The National Weather Service in the Twin Cities has issued a

* Severe Thunderstorm Warning for...
  Northwestern Chippewa County in west central Minnesota...
  Stevens County in west central Minnesota...
  Western Swift County in west central Minnesota...

* Until 645 AM CDT.

* At 555 AM CDT, severe thunderstorms were located along a line
  extending from near Elbow Lake to near Milbank, moving east at 50
  mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

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

* Locations impacted include...
  Appleton and Milan.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4576 9622 4576 9576 4541 9575 4541 9570
      4502 9587 4510 9598 4516 9605 4518 9610
      4524 9610 4524 9612 4541 9612 4542 9624
TIME...MOT...LOC 1055Z 269DEG 42KT 4597 9603 4521 9658 

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

BPH

1 follow-up statement

716 
WWUS53 KMPX 111138
SVSMPX

Severe Weather Statement
National Weather Service Twin Cities/Chanhassen MN
638 AM CDT Fri Jun 11 2021

MNC023-149-151-111148-
/O.EXP.KMPX.SV.W.0027.000000T0000Z-210611T1145Z/
Chippewa MN-Stevens MN-Swift MN-
638 AM CDT Fri Jun 11 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN CHIPPEWA...
STEVENS AND WESTERN SWIFT COUNTIES WILL EXPIRE AT 645 AM CDT...
            
The storms which prompted the warning have weakened below severe
limits, and no longer pose an immediate threat to life or property.
Therefore, the warning will be allowed to expire.  However gusty
winds are still possible with these thunderstorms.

LAT...LON 4576 9622 4576 9576 4541 9575 4541 9570
      4502 9587 4510 9598 4516 9605 4518 9610
      4524 9610 4524 9612 4541 9612 4542 9624
TIME...MOT...LOC 1138Z 269DEG 42KT 4598 9532 4522 9587 

$$

BPH

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 11, 5:50 AM CDT	Severe Thunderstorm Warning	MPX	Lac qui Parle, Yellow Medicine	55 min
Jun 11, 6:09 AM CDT	Severe Thunderstorm Warning	MPX	Douglas, Pope	51 min
Jun 11, 6:36 AM CDT	Special Weather Statement	MPX	Chippewa, Swift, Yellow Medicine	39 min
Jun 11, 6:54 AM CDT	Special Weather Statement	MPX	Douglas, Pope, Todd	66 min
Jun 11, 7:22 AM CDT	Special Weather Statement	MPX	Chippewa, Kandiyohi, Yellow Medicine	38 min
Jun 11, 7:49 AM CDT	Special Weather Statement	MPX	Benton, Meeker, Stearns	56 min
Jun 11, 7:53 AM CDT	Special Weather Statement	MPX	Brown, McLeod, Redwood, Renville	67 min
Jun 11, 8:32 AM CDT	Special Weather Statement	MPX	Martin, Watonwan	58 min
Jun 11, 9:15 AM CDT	Special Weather Statement	MPX	Blue Earth, Faribault	60 min
Jun 11, 10:29 AM CDT	Special Weather Statement	MPX	Freeborn, Rice, Steele, Waseca	46 min
Jun 11, 11:04 AM CDT	Special Weather Statement	MPX	Goodhue	56 min
Jun 11, 11:41 AM CDT	Severe Thunderstorm Warning	MPX	Goodhue	34 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.