Alert archive / Minnesota / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 73, NWS Twin Cities, MN

August 20, 2021Pope County, Stearns County, Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Aug 20, 2021, 6:21 PM CDT for Pope County, Stearns County, Minnesota. It was in force for 39 min. 2 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 20, 2021, 6:21 PM CDT (23:21 UTC)
Expired: Aug 20, 2021, 7:00 PM CDT
In force: 39 min
Issued by: NWS Twin Cities, MN
Area: Storm-based polygon
Tornado: Possible
Hail: 0.88 in
Wind: 60.0 mph

Counties Pope County, MN, Stearns County, MN

The radar

The Minneapolis radar (KMPX), 137 km from the middle of the area, began a volume at 23:21 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 20, 6:30 PM CDT	TORNADO	4 Wsw Belgrade, MN	BRIEF TORNADO TOUCHDOWN ABOUT 2 MILES SOUTH OF, AND BETWEEN, BELGRADE AND BROOTEN.
Aug 20, 6:51 PM CDT	TORNADO	2 Nne Belgrade, MN	BRIEF TOUCHDOWN.

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 20, 3:58 PM CDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 12:00Z, 11.4 hours before the alert went out and 135 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: 48 J/kg
Mixed-layer CIN: -139 J/kg
Mixed-layer LCL: 999 m above ground
0-6 km bulk shear: 20 kt
0-1 km storm-relative helicity: 62 m²/s²
0-3 km storm-relative helicity: 37 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

618 
WUUS53 KMPX 202321
SVRMPX
MNC121-145-210000-
/O.NEW.KMPX.SV.W.0073.210820T2321Z-210821T0000Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Twin Cities/Chanhassen MN
621 PM CDT Fri Aug 20 2021

The National Weather Service in the Twin Cities has issued a

* Severe Thunderstorm Warning for...
  Southeastern Pope County in west central Minnesota...
  Western Stearns County in central Minnesota...

* Until 700 PM CDT.

* At 620 PM CDT, a severe thunderstorm was located 7 miles south of
  Brooten, or 18 miles north of Willmar, moving northeast at 45 mph.

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

  SOURCE...Radar indicated.

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

* This severe thunderstorm will be near...
  Brooten and Belgrade around 630 PM CDT.

Other locations in the path of this severe thunderstorm include
Melrose and Sauk Centre.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4577 9462 4541 9494 4541 9529 4577 9512
TIME...MOT...LOC 2320Z 204DEG 37KT 4539 9515 

TORNADO...POSSIBLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...0.88 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

JLT

3 follow-up statements

944 
WWUS53 KMPX 202330
SVSMPX

Severe Weather Statement
National Weather Service Twin Cities/Chanhassen MN
630 PM CDT Fri Aug 20 2021

MNC121-145-210000-
/O.CON.KMPX.SV.W.0073.000000T0000Z-210821T0000Z/
Pope MN-Stearns MN-
630 PM CDT Fri Aug 20 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 700 PM CDT
FOR SOUTHEASTERN POPE AND NORTHWESTERN STEARNS COUNTIES...

At 629 PM CDT, a severe thunderstorm was located near Brooten, or 23
miles north of Willmar, moving north at 40 mph.

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

SOURCE...Radar indicated.

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

Locations impacted include...
  Sauk Centre.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4577 9462 4541 9502 4541 9529 4577 9512
TIME...MOT...LOC 2329Z 198DEG 33KT 4546 9515 

TORNADO...POSSIBLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...0.88 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

JLT

005 
WWUS53 KMPX 202339
SVSMPX

Severe Weather Statement
National Weather Service Twin Cities/Chanhassen MN
639 PM CDT Fri Aug 20 2021

MNC121-202347-
/O.CAN.KMPX.SV.W.0073.000000T0000Z-210821T0000Z/
Pope MN-
639 PM CDT Fri Aug 20 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN POPE COUNTY IS
CANCELLED...
    
The severe thunderstorm which prompted the warning has moved out of 
the warned area. Therefore, the warning has been cancelled.

A Severe Thunderstorm Watch remains in effect until 1000 PM CDT for
central Minnesota.

LAT...LON 4577 9462 4542 9501 4545 9513 4553 9513
      4577 9512
TIME...MOT...LOC 2337Z 203DEG 40KT 4549 9508 

$$

MNC145-210000-
/O.CON.KMPX.SV.W.0073.000000T0000Z-210821T0000Z/
Stearns MN-
639 PM CDT Fri Aug 20 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 700 PM CDT
FOR NORTHWESTERN STEARNS COUNTY...

At 637 PM CDT, a severe thunderstorm was located over Brooten, or 24 
miles north of Willmar, moving northeast at 45 mph. There was a 
brief tornado touchdown 1.5 miles southeast of Brooten at 630 PM.  

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

SOURCE...Trained weather spotters.

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

Locations impacted include...
  Sauk Centre and Melrose.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4577 9462 4542 9501 4545 9513 4553 9513
      4577 9512
TIME...MOT...LOC 2337Z 203DEG 40KT 4549 9508 

TORNADO...POSSIBLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...0.88 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

JLT

946 
WWUS53 KMPX 202348
SVSMPX

Severe Weather Statement
National Weather Service Twin Cities/Chanhassen MN
648 PM CDT Fri Aug 20 2021

MNC145-210000-
/O.CON.KMPX.SV.W.0073.000000T0000Z-210821T0000Z/
Stearns MN-
648 PM CDT Fri Aug 20 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 700 PM CDT
FOR NORTHWESTERN STEARNS COUNTY...

At 648 PM CDT, a severe thunderstorm was located 9 miles north of
Belgrade, or 30 miles southeast of Alexandria, moving northeast at 50
mph.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

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

Locations impacted include...
Sauk Centre, Melrose, Greenwald, Elrosa, Meire Grove, St. Rosa, Sauk
Centre Airport and Padua.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4550 9492 4552 9509 4559 9508 4577 9502
      4577 9462
TIME...MOT...LOC 2348Z 212DEG 43KT 4558 9494 

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

$$

JLT

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 20, 4:47 PM CDT	Special Weather Statement	MPX	Douglas	28 min
Aug 20, 4:51 PM CDT	Special Weather Statement	MPX	Todd	39 min
Aug 20, 4:54 PM CDT	Severe Thunderstorm Warning	MPX	Douglas	19 min
Aug 20, 5:04 PM CDT	Special Weather Statement	MPX	Swift	41 min
Aug 20, 5:43 PM CDT	Special Weather Statement	MPX	Chippewa, Pope, Swift	32 min
Aug 20, 5:48 PM CDT	Special Weather Statement	MPX	Renville	42 min
Aug 20, 5:50 PM CDT	Special Weather Statement	MPX	Martin, Watonwan	40 min
Aug 20, 6:16 PM CDT	Special Weather Statement	MPX	Stearns	44 min
Aug 20, 6:53 PM CDT	Tornado Warning Tornado observed	MPX	Stearns	37 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.