Alert archive / Minnesota / Severe Thunderstorm Warnings in 2020

Severe Thunderstorm Warning 174, NWS Twin Cities, MN

September 6, 2020Chippewa County, Renville County, Yellow Medicine County, Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Sep 6, 2020, 12:09 AM CDT for Chippewa County, Renville County, Yellow Medicine County, Minnesota. It was in force for 66 min. 1 report 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: Sep 6, 2020, 12:09 AM CDT (05:09 UTC)
Expired: Sep 6, 2020, 1:15 AM CDT
In force: 66 min
Issued by: NWS Twin Cities, MN
Area: Storm-based polygon
Hail: 1.5 in
Wind: 50.0 mph

Counties Chippewa County, MN, Renville County, MN, Yellow Medicine County, MN

The radar

The Minneapolis radar (KMPX), 158 km from the middle of the area, began a volume at 05:13 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
Sep 6, 12:35 AM CDT	HAIL 1	1 Sw Granite Falls, MN	HAIL WAS PHOTOGRAPHED NEXT TO A RULER.

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
Sep 5, 9:34 PM CDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 00:00Z, 5.2 hours before the alert went out and 155 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: 2083 m above ground
0-6 km bulk shear: 54 kt
0-1 km storm-relative helicity: 84 m²/s²
0-3 km storm-relative helicity: 170 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

198 
WUUS53 KMPX 060509
SVRMPX
MNC023-129-173-060615-
/O.NEW.KMPX.SV.W.0174.200906T0509Z-200906T0615Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Twin Cities/Chanhassen MN
1209 AM CDT Sun Sep 6 2020

The National Weather Service in the Twin Cities has issued a

* Severe Thunderstorm Warning for...
  Southeastern Chippewa County in west central Minnesota...
  Northeastern Yellow Medicine County in west central Minnesota...
  Northwestern Renville County in central Minnesota...

* Until 115 AM CDT.

* At 1209 AM CDT, a severe thunderstorm was located near Boyd, or 6
  miles southwest of Montevideo, moving southeast at 30 mph.

  HAZARD...Ping pong ball size hail.

  SOURCE...Radar indicated.

  IMPACT...People and animals outdoors will be injured. Expect 
           damage to roofs, siding, windows, and vehicles.

* This severe thunderstorm will be near...
  Montevideo around 1215 AM CDT.
  Clarkfield around 1220 AM CDT.
  Granite Falls and Maynard around 1245 AM CDT.
  Sacred Heart around 100 AM CDT.

Other locations impacted by this severe thunderstorm include Granite
Falls Airport, Asbury, Montevideo Airport, Gluek, Minnesota Falls and
Hazel Run.

This includes Prairies Edge Casino Resort.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4489 9585 4490 9574 4493 9573 4494 9576
      4502 9574 4501 9524 4490 9525 4469 9533
      4470 9536 4461 9535 4456 9537 4480 9585
TIME...MOT...LOC 0509Z 295DEG 25KT 4491 9584 

HAIL...1.50IN
WIND...<50MPH
 
$$

Borghoff

3 follow-up statements

121 
WWUS53 KMPX 060539 RRA
SVSMPX

Severe Weather Statement
National Weather Service Twin Cities/Chanhassen MN
1239 AM CDT Sun Sep 6 2020

MNC023-129-173-060615-
/O.CON.KMPX.SV.W.0174.000000T0000Z-200906T0615Z/
Chippewa MN-Yellow Medicine MN-Renville MN-
1239 AM CDT Sun Sep 6 2020

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 115 AM CDT
FOR SOUTH CENTRAL CHIPPEWA...EAST CENTRAL YELLOW MEDICINE AND
NORTHWESTERN RENVILLE COUNTIES...

At 1239 AM CDT, a severe thunderstorm was located near Granite Falls,
or 17 miles southeast of Montevideo, moving southeast 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...
  Sacred Heart around 1250 AM CDT.
  Echo around 1255 AM CDT.

Other locations impacted by this severe thunderstorm include Granite
Falls Airport and Minnesota Falls.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4469 9564 4491 9551 4483 9528 4469 9533
      4470 9536 4461 9535 4456 9537 4457 9539
TIME...MOT...LOC 0539Z 298DEG 30KT 4476 9548 

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

Borghoff

674 
WWUS53 KMPX 060551
SVSMPX

Severe Weather Statement
National Weather Service Twin Cities/Chanhassen MN
1251 AM CDT Sun Sep 6 2020

MNC023-060601-
/O.CAN.KMPX.SV.W.0174.000000T0000Z-200906T0615Z/
Chippewa MN-
1251 AM CDT Sun Sep 6 2020

...THE SEVERE THUNDERSTORM WARNING FOR SOUTH CENTRAL CHIPPEWA 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 300 AM CDT for
central, southwestern and west central Minnesota.

LAT...LON 4468 9550 4485 9541 4483 9528 4469 9533
      4470 9536 4462 9535
TIME...MOT...LOC 0551Z 291DEG 25KT 4475 9537 

$$

MNC129-173-060615-
/O.CON.KMPX.SV.W.0174.000000T0000Z-200906T0615Z/
Yellow Medicine MN-Renville MN-
1251 AM CDT Sun Sep 6 2020

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 115 AM CDT
FOR EAST CENTRAL YELLOW MEDICINE AND NORTHWESTERN RENVILLE
COUNTIES...

At 1251 AM CDT, a severe thunderstorm was located over Sacred Heart,
or 18 miles northwest of Redwood Falls, moving east at 30 mph.

HAZARD...Half dollar size hail.

SOURCE...Radar indicated.

IMPACT...Damage to vehicles is expected.

This severe thunderstorm will remain over mainly rural areas of east
central Yellow Medicine and northwestern Renville Counties.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4468 9550 4485 9541 4483 9528 4469 9533
      4470 9536 4462 9535
TIME...MOT...LOC 0551Z 291DEG 25KT 4475 9537 

HAIL...1.25IN
WIND...<50MPH
 
$$

Borghoff

944 
WWUS53 KMPX 060606 RRA
SVSMPX

Severe Weather Statement
National Weather Service Twin Cities/Chanhassen MN
106 AM CDT Sun Sep 6 2020

MNC129-173-060616-
/O.EXP.KMPX.SV.W.0174.000000T0000Z-200906T0615Z/
Yellow Medicine MN-Renville MN-
106 AM CDT Sun Sep 6 2020

...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL YELLOW MEDICINE
AND NORTHWESTERN RENVILLE COUNTIES WILL EXPIRE AT 115 AM CDT...
        
The storm which prompted the warning has moved out of the area.
Therefore, the warning will be allowed to expire.

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

LAT...LON 4468 9550 4485 9541 4483 9528 4469 9533
      4470 9536 4462 9535
TIME...MOT...LOC 0606Z 295DEG 25KT 4472 9527 

$$

Borghoff

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 5, 10:57 PM CDT	Severe Thunderstorm Warning	MPX	McLeod, Sibley	48 min
Sep 5, 11:09 PM CDT	Severe Thunderstorm Warning	MPX	Renville	51 min
Sep 5, 11:17 PM CDT	Severe Thunderstorm Warning	MPX	Redwood, Renville, Yellow Medicine	43 min
Sep 5, 11:31 PM CDT	Severe Thunderstorm Warning	MPX	Le Sueur, Rice, Steele, Waseca	44 min
Sep 5, 11:34 PM CDT	Severe Thunderstorm Warning	MPX	Kandiyohi, Meeker	56 min
Sep 5, 11:36 PM CDT	Severe Thunderstorm Warning	MPX	Chippewa, Lac qui Parle	54 min
Sep 5, 11:58 PM CDT	Severe Thunderstorm Warning	MPX	McLeod, Sibley	47 min
Sep 6, 12:11 AM CDT	Severe Thunderstorm Warning	MPX	Carver, Hennepin, Scott	34 min
Sep 6, 12:12 AM CDT	Severe Thunderstorm Warning	MPX	Steele	33 min
Sep 6, 12:15 AM CDT	Severe Thunderstorm Warning	MPX	Wright	15 min
Sep 6, 12:38 AM CDT	Severe Thunderstorm Warning	MPX	Hennepin	22 min
Sep 6, 12:43 AM CDT	Severe Thunderstorm Warning	MPX	Brown, Nicollet, Redwood, Renville, Sibley	62 min
Sep 6, 12:50 AM CDT	Severe Thunderstorm Warning	MPX	Redwood, Renville	42 min
Sep 6, 1:09 AM CDT	Severe Thunderstorm Warning	MPX	Blue Earth, Brown, Le Sueur, Nicollet	53 min
Sep 6, 1:17 AM CDT	Severe Thunderstorm Warning	MPX	Martin	38 min
Sep 6, 1:30 AM CDT	Severe Thunderstorm Warning	MPX	Blue Earth, Martin, Watonwan	45 min
Sep 6, 2:01 AM CDT	Severe Thunderstorm Warning	MPX	Blue Earth, Faribault, Martin, Watonwan	44 min
Sep 6, 4:05 AM CDT	Special Weather Statement	MPX	Dakota	25 min
Sep 6, 4:26 AM CDT	Special Weather Statement	MPX	Goodhue	19 min
Sep 6, 4:30 AM CDT	Severe Thunderstorm Warning	MPX	Dakota	30 min
Sep 6, 4:48 AM CDT	Severe Thunderstorm Warning	MPX	Goodhue	42 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.