Alert archive / Minnesota / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 92, NWS Twin Cities, MN

August 26, 2021Chippewa County, Swift County, Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Aug 26, 2021, 11:05 AM CDT for Chippewa County, Swift County, Minnesota. It was in force for 40 min. 3 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: Aug 26, 2021, 11:05 AM CDT (16:05 UTC)
Expired: Aug 26, 2021, 11:45 AM CDT
In force: 40 min
Issued by: NWS Twin Cities, MN
Area: Storm-based polygon
Tornado: Possible
Hail: 1.0 in
Wind: 60.0 mph

Counties Chippewa County, MN, Swift County, MN

The radar

The Minneapolis radar (KMPX), 181 km from the middle of the area, began a volume at 16:08 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
Aug 26, 11:10 AM CDT	TSTM WND DMG	Appleton, MN	TREE BRANCH DOWN OVER POWER LINE. TIME ESTIMATED BY RADAR.
Aug 26, 11:13 AM CDT	TSTM WND GST 47	1 Ne Appleton, MN	AWOS STATION KAQP APPLETON AP.
Aug 26, 11:36 AM CDT	TSTM WND GST 78	2 W Benson, MN	AWOS STATION KBBB BENSON AP.

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
Aug 26, 9:05 AM CDT	Severe Thunderstorm Watch	SPC	4 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 12:00Z, 4.1 hours before the alert went out and 178 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: 1566 m above ground
0-6 km bulk shear: 33 kt
0-1 km storm-relative helicity: 65 m²/s²
0-3 km storm-relative helicity: 146 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

635 
WUUS53 KMPX 261605
SVRMPX
MNC023-151-261645-
/O.NEW.KMPX.SV.W.0092.210826T1605Z-210826T1645Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Twin Cities/Chanhassen MN
1105 AM CDT Thu Aug 26 2021

The National Weather Service in the Twin Cities has issued a

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

* Until 1145 AM CDT.

* At 1105 AM CDT, a severe thunderstorm was located near Appleton, or
  19 miles northwest of Montevideo, moving east at 35 mph.

  HAZARD...60 mph wind gusts and quarter size hail.

  SOURCE...Radar indicated.

  IMPACT...Hail damage to vehicles is expected. Expect wind damage 
           to roofs, siding, and trees.

* Locations impacted include...
  Benson, Appleton, Milan, Watson, Hagen, Danvers, Holloway, Benson
  Airport and Big Bend City.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4511 9599 4520 9608 4535 9557 4497 9555
      4498 9580
TIME...MOT...LOC 1605Z 268DEG 30KT 4515 9599 

TORNADO...POSSIBLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

PEM/BPH

1 follow-up statement

222 
WWUS53 KMPX 261638
SVSMPX

Severe Weather Statement
National Weather Service Twin Cities/Chanhassen MN
1138 AM CDT Thu Aug 26 2021

MNC023-151-261647-
/O.EXP.KMPX.SV.W.0092.000000T0000Z-210826T1645Z/
Chippewa MN-Swift MN-
1138 AM CDT Thu Aug 26 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN CHIPPEWA AND
SOUTHWESTERN SWIFT COUNTIES WILL EXPIRE AT 1145 AM 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 Severe Thunderstorm Watch remains in effect until 300 PM CDT for
west central Minnesota.

LAT...LON 4511 9599 4520 9608 4535 9557 4497 9555
      4498 9580
TIME...MOT...LOC 1637Z 270DEG 30KT 4516 9562 

$$

PEM

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 26, 10:39 AM CDT	Severe Thunderstorm Warning	MPX	Lac qui Parle, Yellow Medicine	51 min
Aug 26, 10:54 AM CDT	Special Weather Statement	MPX	Stevens	36 min
Aug 26, 11:32 AM CDT	Special Weather Statement	MPX	Chippewa	28 min
Aug 26, 11:37 AM CDT	Severe Thunderstorm Warning Considerable damage threat	MPX	Chippewa, Kandiyohi, Swift	23 min
Aug 26, 12:08 PM CDT	Special Weather Statement	MPX	Kandiyohi, Meeker	22 min
Aug 26, 12:22 PM CDT	Special Weather Statement	MPX	Renville	23 min
Aug 26, 12:25 PM CDT	Wind Advisory	MPX	Benton, Chippewa, Douglas, Kandiyohi, Lac qui Parle, Meeker and 9 more	3 hr
Aug 26, 12:52 PM CDT	Special Weather Statement	MPX	McLeod	23 min
Aug 26, 1:15 PM CDT	Special Weather Statement	MPX	Carver	30 min
Aug 26, 1:44 PM CDT	Special Weather Statement	MPX	Carver, Hennepin	31 min
Aug 26, 1:47 PM CDT	Severe Thunderstorm Warning	MPX	Carver, Hennepin	28 min
Aug 26, 2:05 PM CDT	Severe Thunderstorm Warning	MPX	Dakota, Hennepin, Ramsey, Scott, Washington	40 min
Aug 26, 2:14 PM CDT	Severe Thunderstorm Warning	MPX	Anoka, Hennepin, Ramsey	46 min
Aug 26, 2:44 PM CDT	Severe Thunderstorm Warning	MPX	Washington	46 min
Aug 26, 2:51 PM CDT	Special Weather Statement	MPX	Washington	24 min
Aug 26, 5:44 PM CDT	Flash Flood Watch	MPX	Anoka, Benton, Blue Earth, Brown, Carver, Dakota and 22 more	13 hr

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.