Alert archive / Minnesota / Severe Thunderstorm Warnings in 2020

Severe Thunderstorm Warning 166, NWS Twin Cities, MN

August 28, 2020Rice County, Steele County, Waseca County, Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Aug 28, 2020, 5:35 AM CDT for Rice County, Steele County, Waseca County, Minnesota. It was in force for 40 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 28, 2020, 5:35 AM CDT (10:35 UTC)
Expired: Aug 28, 2020, 6:15 AM CDT
In force: 40 min
Issued by: NWS Twin Cities, MN
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Rice County, MN, Steele County, MN, Waseca County, MN

The radar

The Minneapolis radar (KMPX), 78 km from the middle of the area, began a volume at 10:39 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 28, 1:54 AM CDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 00:00Z, 10.6 hours before the alert went out and 79 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: 487 J/kg
Mixed-layer CIN: -107 J/kg
Mixed-layer LCL: 1571 m above ground
0-6 km bulk shear: 41 kt
0-1 km storm-relative helicity: 12 m²/s²
0-3 km storm-relative helicity: 109 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.3

Open this sounding in Storm Lab

The text

As transmitted.

160 
WUUS53 KMPX 281035
SVRMPX
MNC131-147-161-281115-
/O.NEW.KMPX.SV.W.0166.200828T1035Z-200828T1115Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Twin Cities/Chanhassen MN
535 AM CDT Fri Aug 28 2020

The National Weather Service in the Twin Cities has issued a

* Severe Thunderstorm Warning for...
  Northern Steele County in south central Minnesota...
  Southeastern Rice County in south central Minnesota...
  Northeastern Waseca County in south central Minnesota...

* Until 615 AM CDT.

* At 535 AM CDT, a severe thunderstorm was located over Waseca, or 17
  miles west of Owatonna, moving east at 30 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.

* This severe thunderstorm will be near...
  Waseca around 540 AM CDT.
  Owatonna and Medford around 610 AM CDT.

Other locations impacted by this severe thunderstorm include Clinton
Falls, Waseca Airport, Merton, Ruskin, Deerfield, Owatonna Airport
and Moland.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4398 9364 4417 9369 4420 9356 4420 9353
      4421 9352 4432 9305 4431 9304 4402 9305
TIME...MOT...LOC 1035Z 259DEG 27KT 4409 9356 

HAIL...1.00IN
WIND...60MPH
 
$$

NDC

2 follow-up statements

149 
WWUS53 KMPX 281048
SVSMPX

Severe Weather Statement
National Weather Service Twin Cities/Chanhassen MN
548 AM CDT Fri Aug 28 2020

MNC161-281058-
/O.CAN.KMPX.SV.W.0166.000000T0000Z-200828T1115Z/
Waseca MN-
548 AM CDT Fri Aug 28 2020

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN WASECA 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 900 AM CDT for
south central and southeastern Minnesota.

LAT...LON 4419 9341 4423 9340 4424 9338 4432 9305
      4431 9304 4402 9305 4400 9341
TIME...MOT...LOC 1048Z 263DEG 31KT 4409 9336 

$$

MNC131-147-281115-
/O.CON.KMPX.SV.W.0166.000000T0000Z-200828T1115Z/
Steele MN-Rice MN-
548 AM CDT Fri Aug 28 2020

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 615 AM CDT
FOR NORTHERN STEELE AND SOUTHEASTERN RICE COUNTIES...

At 548 AM CDT, a severe thunderstorm was located near Owatonna,
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.

This severe storm will be near...
  Medford around 600 AM CDT.
  Owatonna around 605 AM CDT.

Other locations impacted by this severe thunderstorm include Clinton
Falls, Merton, Deerfield, Ruskin, Owatonna Airport and Moland.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4419 9341 4423 9340 4424 9338 4432 9305
      4431 9304 4402 9305 4400 9341
TIME...MOT...LOC 1048Z 263DEG 31KT 4409 9336 

HAIL...1.00IN
WIND...60MPH
 
$$

NDC

362 
WWUS53 KMPX 281107
SVSMPX

Severe Weather Statement
National Weather Service Twin Cities/Chanhassen MN
607 AM CDT Fri Aug 28 2020

MNC131-147-281117-
/O.EXP.KMPX.SV.W.0166.000000T0000Z-200828T1115Z/
Steele MN-Rice MN-
607 AM CDT Fri Aug 28 2020

...THE SEVERE THUNDERSTORM WARNING FOR NORTHERN STEELE AND
SOUTHEASTERN RICE COUNTIES WILL EXPIRE AT 615 AM CDT...
        
The storm which prompted the warning has moved out of the area.
Therefore, the warning will be allowed to expire.  However small hail
is still possible with this thunderstorm.

A Severe Thunderstorm Watch remains in effect until 900 AM CDT for
south central and southeastern Minnesota.

LAT...LON 4419 9341 4423 9340 4424 9338 4432 9305
      4431 9304 4402 9305 4400 9341
TIME...MOT...LOC 1107Z 259DEG 27KT 4411 9318 

$$

NDC

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 28, 2:14 AM CDT	Severe Thunderstorm Warning	MPX	Lac qui Parle, Yellow Medicine	61 min
Aug 28, 2:58 AM CDT	Severe Thunderstorm Warning	MPX	Brown, Chippewa, Kandiyohi, Lac qui Parle, Redwood, Renville and 2 more	47 min
Aug 28, 3:44 AM CDT	Severe Thunderstorm Warning	MPX	Brown, McLeod, Nicollet, Redwood, Renville, Sibley	46 min
Aug 28, 3:46 AM CDT	Special Weather Statement	MPX	Kandiyohi, Meeker	44 min
Aug 28, 4:25 AM CDT	Special Weather Statement	MPX	Carver, Le Sueur, Nicollet, Scott, Sibley	35 min
Aug 28, 4:27 AM CDT	Special Weather Statement	MPX	Hennepin, Sherburne, Wright	33 min
Aug 28, 4:48 AM CDT	Special Weather Statement	MPX	Anoka, Carver, Dakota, Hennepin, Ramsey, Scott and 2 more	42 min
Aug 28, 5:26 AM CDT	Special Weather Statement	MPX	Steele, Waseca	34 min
Aug 28, 5:32 AM CDT	Special Weather Statement	MPX	Chisago, Dakota, Washington	28 min
Aug 28, 5:38 AM CDT	Special Weather Statement	MPX	Faribault	37 min
Aug 28, 6:11 AM CDT	Special Weather Statement	MPX	Goodhue	19 min

Nearby

Severe Thunderstorm Warnings in Minnesota, 2020 Every severe thunderstorm warning in 2020

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.