Alert archive / Minnesota / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 93, NWS Twin Cities, MN

August 26, 2021Chippewa County, Kandiyohi County, Swift County, Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Aug 26, 2021, 11:37 AM CDT for Chippewa County, Kandiyohi County, Swift County, Minnesota. It was in force for 23 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: Aug 26, 2021, 11:37 AM CDT (16:37 UTC)
Expired: Aug 26, 2021, 12:00 PM CDT
In force: 23 min
Issued by: NWS Twin Cities, MN
Area: Storm-based polygon
Damage threat: Considerable
Hail: 0.75 in
Wind: 70.0 mph

Counties Chippewa County, MN, Kandiyohi County, MN, Swift County, MN

The radar

The Minneapolis radar (KMPX), 139 km from the middle of the area, began a volume at 16:38 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 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, 4.6 hours before the alert went out and 136 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.

298 
WUUS53 KMPX 261637
SVRMPX
MNC023-067-151-261700-
/O.NEW.KMPX.SV.W.0093.210826T1637Z-210826T1700Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Twin Cities/Chanhassen MN
1137 AM CDT Thu Aug 26 2021

The National Weather Service in the Twin Cities has issued a

* Severe Thunderstorm Warning for...
  Northeastern Chippewa County in west central Minnesota...
  Eastern Swift County in west central Minnesota...
  Western Kandiyohi County in central Minnesota...

* Until noon CDT.

* At 1135 AM CDT, severe thunderstorms were located along a line
  extending from near Lake Hassel to 5 miles southwest of Murdock to 
  near Maynard, moving east at 50 mph. Benson, MN recently reported 
  a gust of 78 MPH.

  HAZARD...70 mph wind gusts and penny size hail.

  SOURCE...Radar indicated.

  IMPACT...Expect considerable tree damage. Damage is likely to 
           mobile homes, roofs, and outbuildings.

* Severe thunderstorms will be near...
  Murdock around 1140 AM CDT.
  Kerkhoven around 1145 AM CDT.
  Raymond around 1150 AM CDT.
  Willmar around 1155 AM CDT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4541 9502 4513 9496 4499 9499 4496 9559
      4515 9558 4541 9562
TIME...MOT...LOC 1635Z 272DEG 43KT 4543 9551 4515 9544 4497 9549 

THUNDERSTORM DAMAGE THREAT...CONSIDERABLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...0.75 IN
WIND THREAT...OBSERVED
MAX WIND GUST...70 MPH

$$

PEM/BPH

1 follow-up statement

952 
WWUS53 KMPX 261652
SVSMPX

Severe Weather Statement
National Weather Service Twin Cities/Chanhassen MN
1152 AM CDT Thu Aug 26 2021

MNC023-067-151-261702-
/O.EXP.KMPX.SV.W.0093.000000T0000Z-210826T1700Z/
Chippewa MN-Swift MN-Kandiyohi MN-
1152 AM CDT Thu Aug 26 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN CHIPPEWA...
EASTERN SWIFT AND WESTERN KANDIYOHI COUNTIES WILL EXPIRE AT NOON
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 and heavy rain are still possible with these thunderstorms.

A Severe Thunderstorm Watch remains in effect until 300 PM CDT for
central and west central Minnesota.

To report severe weather and damage resulting from severe weather, 
contact your nearest law enforcement agency. They will relay your 
report to the National Weather Service the Twin Cities.

LAT...LON 4541 9502 4513 9496 4499 9499 4496 9559
      4515 9558 4541 9562
TIME...MOT...LOC 1652Z 272DEG 43KT 4542 9524 4514 9517 4496 9522 

$$

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, 11:05 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, 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.