Alert archive / Minnesota / Severe Thunderstorm Warnings in 2020

Severe Thunderstorm Warning 23, NWS Twin Cities, MN

June 18, 2020Brown County, Nicollet County, Sibley County, Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Jun 18, 2020, 4:36 PM CDT for Brown County, Nicollet County, Sibley County, Minnesota. It was in force for 39 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: Jun 18, 2020, 4:36 PM CDT (21:36 UTC)
Expired: Jun 18, 2020, 5:15 PM CDT
In force: 39 min
Issued by: NWS Twin Cities, MN
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Brown County, MN, Nicollet County, MN, Sibley County, MN

The radar

The Minneapolis radar (KMPX), 80 km from the middle of the area, began a volume at 21:41 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.

The nearest sounding before it

Minneapolis, MN (KMPX), launched 12:00Z, 9.6 hours before the alert went out and 78 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: 39 J/kg
Mixed-layer CIN: -270 J/kg
Mixed-layer LCL: 1316 m above ground
0-6 km bulk shear: 26 kt
0-1 km storm-relative helicity: 319 m²/s²
0-3 km storm-relative helicity: 276 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

729 
WUUS53 KMPX 182136
SVRMPX
MNC015-103-143-182215-
/O.NEW.KMPX.SV.W.0023.200618T2136Z-200618T2215Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Twin Cities/Chanhassen MN
436 PM CDT Thu Jun 18 2020

The National Weather Service in The Twin Cities has issued a

* Severe Thunderstorm Warning for...
  Southeastern Sibley County in central Minnesota...
  Southeastern Brown County in south central Minnesota...
  Northeastern Nicollet County in south central Minnesota...

* Until 515 PM CDT.

* At 435 PM CDT, a severe thunderstorm was located near Courtland, or
  near New Ulm, moving northeast 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.

* Locations impacted include...
  New Ulm, Arlington, Courtland, New Sweden, Klossner, Rush River,
  New Ulm Airport, Searles, New Rome and Norseland.

This includes the following highways...
 U.S. Highway 14 between mile markers 99 and 112.
 U.S. Highway 169 between mile markers 73 and 78.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4415 9459 4433 9455 4461 9408 4448 9390
      4445 9393 4442 9393 4425 9434 4426 9436
      4424 9437
TIME...MOT...LOC 2135Z 234DEG 27KT 4433 9435 

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

Dye

2 follow-up statements

232 
WWUS53 KMPX 182204
SVSMPX

Severe Weather Statement
National Weather Service Twin Cities/Chanhassen MN
504 PM CDT Thu Jun 18 2020

MNC015-182214-
/O.CAN.KMPX.SV.W.0023.000000T0000Z-200618T2215Z/
Brown MN-
504 PM CDT Thu Jun 18 2020

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

LAT...LON 4427 9441 4436 9449 4461 9408 4448 9390
      4442 9393 4425 9433
TIME...MOT...LOC 2204Z 234DEG 27KT 4446 9410 

$$

MNC103-143-182215-
/O.CON.KMPX.SV.W.0023.000000T0000Z-200618T2215Z/
Sibley MN-Nicollet MN-
504 PM CDT Thu Jun 18 2020

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 515 PM CDT
FOR SOUTHEASTERN SIBLEY AND NORTHEASTERN NICOLLET COUNTIES...

At 504 PM CDT, a severe thunderstorm was located 8 miles southeast of
Gaylord, or 20 miles northeast of New Ulm, moving northeast 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.

Locations impacted include...
New Ulm, Le Sueur, Arlington, Courtland, New Sweden, Klossner, Rush
River, New Rome and Norseland.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4427 9441 4436 9449 4461 9408 4448 9390
      4442 9393 4425 9433
TIME...MOT...LOC 2204Z 234DEG 27KT 4446 9410 

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

Dye

910 
WWUS53 KMPX 182210 RRA
SVSMPX

Severe Weather Statement
National Weather Service Twin Cities/Chanhassen MN
510 PM CDT Thu Jun 18 2020

MNC103-143-182220-
/O.EXP.KMPX.SV.W.0023.000000T0000Z-200618T2215Z/
Sibley MN-Nicollet MN-
510 PM CDT Thu Jun 18 2020

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN SIBLEY AND
NORTHEASTERN NICOLLET COUNTIES WILL EXPIRE AT 515 PM CDT...
                
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning will be allowed to expire.  However gusty
winds are still possible with this thunderstorm.

LAT...LON 4427 9441 4436 9449 4461 9408 4448 9390
      4442 9393 4425 9433
TIME...MOT...LOC 2210Z 234DEG 27KT 4448 9405 

$$

Dye

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 18, 4:31 AM CDT	Special Weather Statement	MPX	Chippewa, Pope, Swift	59 min
Jun 18, 5:31 AM CDT	Special Weather Statement	MPX	Kandiyohi, Pope, Renville	59 min
Jun 18, 6:32 AM CDT	Special Weather Statement	MPX	Kandiyohi, Stearns	58 min
Jun 18, 3:29 PM CDT	Special Weather Statement	MPX	Renville	31 min
Jun 18, 3:56 PM CDT	Special Weather Statement	MPX	Brown	34 min
Jun 18, 4:02 PM CDT	Special Weather Statement	MPX	McLeod	28 min
Jun 18, 4:07 PM CDT	Severe Thunderstorm Warning	MPX	Brown, Nicollet, Renville, Sibley	38 min
Jun 18, 4:30 PM CDT	Severe Thunderstorm Warning	MPX	McLeod, Nicollet, Sibley	45 min
Jun 18, 4:35 PM CDT	Special Weather Statement	MPX	Wright	25 min
Jun 18, 4:36 PM CDT	Special Weather Statement	MPX	Watonwan	39 min
Jun 18, 4:58 PM CDT	Special Weather Statement	MPX	Wright	32 min
Jun 18, 5:12 PM CDT	Special Weather Statement	MPX	Watonwan	33 min
Jun 18, 5:15 PM CDT	Special Weather Statement	MPX	Carver, Nicollet, Sibley	45 min
Jun 18, 5:16 PM CDT	Special Weather Statement	MPX	Martin	59 min
Jun 18, 5:32 PM CDT	Special Weather Statement	MPX	Anoka	43 min
Jun 18, 5:45 PM CDT	Special Weather Statement	MPX	Blue Earth	60 min
Jun 18, 5:58 PM CDT	Special Weather Statement	MPX	Faribault	62 min
Jun 18, 6:04 PM CDT	Special Weather Statement	MPX	Dakota	41 min
Jun 18, 6:28 PM CDT	Special Weather Statement	MPX	Dakota, Hennepin, Ramsey, Washington	47 min
Jun 18, 6:52 PM CDT	Special Weather Statement	MPX	Freeborn, Steele, Waseca	23 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.