Alert archive / Minnesota / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 91, NWS Twin Cities, MN

August 26, 2021Lac qui Parle County, Yellow Medicine County, Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Aug 26, 2021, 10:39 AM CDT for Lac qui Parle County, Yellow Medicine County, Minnesota. It was in force for 51 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, 10:39 AM CDT (15:39 UTC)
Expired: Aug 26, 2021, 11:30 AM CDT
In force: 51 min
Issued by: NWS Twin Cities, MN
Area: Storm-based polygon
Tornado: Possible
Hail: 1.0 in
Wind: 60.0 mph

Counties Lac qui Parle County, MN, Yellow Medicine County, MN

The radar

The Sioux Falls radar (KFSD), 161 km from the middle of the area, began a volume at 15:41 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, 10:50 AM CDT	TSTM WND GST 57	5 Ssw Marietta, MN	MESONET STATION MN059 MARIETTA 5SSW.
Aug 26, 10:55 AM CDT	TSTM WND GST 56	2 Nne Canby, MN	AWOS STATION KCNB CANBY AP.
Aug 26, 11:15 AM CDT	TSTM WND GST 45	2 S Madison, MN	AWOS STATION KDXX MADISON 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

Aberdeen, SD (KABR), launched 12:00Z, 3.7 hours before the alert went out and 184 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: 1092 m above ground
0-6 km bulk shear: 62 kt
0-1 km storm-relative helicity: 365 m²/s²
0-3 km storm-relative helicity: 490 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.4

Open this sounding in Storm Lab

The text

As transmitted.

585 
WUUS53 KMPX 261539
SVRMPX
MNC073-173-261630-
/O.NEW.KMPX.SV.W.0091.210826T1539Z-210826T1630Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Twin Cities/Chanhassen MN
1039 AM CDT Thu Aug 26 2021

The National Weather Service in the Twin Cities has issued a

* Severe Thunderstorm Warning for...
  Lac qui Parle County in west central Minnesota...
  Western Yellow Medicine County in west central Minnesota...

* Until 1130 AM CDT.

* At 1038 AM CDT, a severe thunderstorm was located 7 miles north of
  Gary, or 16 miles northeast of Clear Lake, moving east at 45 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...
  Canby, Madison, Dawson, Clarkfield, Porter, Boyd, Bellingham,
  Marietta, Cerro Gordo, Providence, Spring Creek and Nassau.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4516 9645 4512 9600 4500 9583 4496 9582
      4494 9574 4463 9573 4463 9645
TIME...MOT...LOC 1538Z 264DEG 39KT 4489 9641 

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

$$

PEM/BPH

2 follow-up statements

410 
WWUS53 KMPX 261617
SVSMPX

Severe Weather Statement
National Weather Service Twin Cities/Chanhassen MN
1117 AM CDT Thu Aug 26 2021

MNC073-173-261630-
/O.CON.KMPX.SV.W.0091.000000T0000Z-210826T1630Z/
Lac qui Parle MN-Yellow Medicine MN-
1117 AM CDT Thu Aug 26 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1130 AM CDT
FOR SOUTHEASTERN LAC QUI PARLE AND CENTRAL YELLOW MEDICINE
COUNTIES...

At 1117 AM CDT, a severe thunderstorm was located near Montevideo,
moving east at 45 mph.

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

SOURCE...Radar indicated.

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

Locations impacted include...
Canby, Madison, Dawson, Clarkfield, Porter, Boyd, Bellingham, Cerro
Gordo, Providence, Spring Creek, St. Leo and Madison Airport.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4512 9600 4500 9583 4496 9582 4494 9574
      4463 9573 4463 9625 4515 9629
TIME...MOT...LOC 1617Z 264DEG 39KT 4493 9581 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...0.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

PEM

480 
WWUS53 KMPX 261622
SVSMPX

Severe Weather Statement
National Weather Service Twin Cities/Chanhassen MN
1122 AM CDT Thu Aug 26 2021

MNC073-173-261632-
/O.EXP.KMPX.SV.W.0091.000000T0000Z-210826T1630Z/
Lac qui Parle MN-Yellow Medicine MN-
1122 AM CDT Thu Aug 26 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN LAC QUI PARLE AND
CENTRAL YELLOW MEDICINE COUNTIES WILL EXPIRE AT 1130 AM 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 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 4512 9600 4500 9583 4496 9582 4494 9574
      4463 9573 4463 9625 4515 9629
TIME...MOT...LOC 1622Z 264DEG 39KT 4493 9576 

$$

PEM

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 26, 10:54 AM CDT	Special Weather Statement	MPX	Stevens	36 min
Aug 26, 11:05 AM CDT	Severe Thunderstorm Warning	MPX	Chippewa, Swift	40 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.