Alert archive / Minnesota / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 38, NWS Twin Cities, MN

June 17, 2021Nicollet County, Sibley County, Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Jun 17, 2021, 7:41 PM CDT for Nicollet County, Sibley County, Minnesota. It was in force for 26 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: Jun 17, 2021, 7:41 PM CDT (00:41 UTC)
Expired: Jun 17, 2021, 8:07 PM CDT
In force: 26 min
Issued by: NWS Twin Cities, MN
Area: Storm-based polygon
Hail: 1.25 in
Wind: 60.0 mph

Counties Nicollet County, MN, Sibley County, MN

The radar

The Minneapolis radar (KMPX), 78 km from the middle of the area, began a volume at 00:41 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.

What was reported inside it

Time	Report	Where	Remark
Jun 17, 8:05 PM CDT	HAIL 1	2 S New Sweden, MN	REPORTED VIA TWITTER WITH PHOTO.

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
Jun 17, 7:22 PM CDT	Severe Thunderstorm Watch	SPC	4 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 00:00Z, 0.7 hours before the alert went out and 76 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: 61 J/kg
Mixed-layer CIN: -387 J/kg
Mixed-layer LCL: 1555 m above ground
0-6 km bulk shear: 55 kt
0-1 km storm-relative helicity: -13 m²/s²
0-3 km storm-relative helicity: 56 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

Open this sounding in Storm Lab

The text

As transmitted.

528 
WUUS53 KMPX 180041
SVRMPX
MNC103-143-180130-
/O.NEW.KMPX.SV.W.0038.210618T0041Z-210618T0130Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Twin Cities/Chanhassen MN
741 PM CDT Thu Jun 17 2021

The National Weather Service in the Twin Cities has issued a

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

* Until 830 PM CDT.

* At 741 PM CDT, a severe thunderstorm was located over Lafayette, or
  9 miles northeast of New Ulm, moving east at 35 mph.

  HAZARD...60 mph wind gusts and half dollar size hail.

  SOURCE...Radar indicated.

  IMPACT...Hail damage to vehicles is expected. Expect wind damage 
           to roofs, siding, and trees.

* This severe thunderstorm will remain over mainly rural areas of
  southeastern Sibley and Nicollet Counties, including the following
  locations... Klossner, Rush River, Oshawa, New Sweden and
  Norseland.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4430 9445 4435 9449 4437 9455 4449 9452
      4456 9393 4430 9398 4426 9403 4425 9401
      4424 9403 4420 9402
TIME...MOT...LOC 0041Z 270DEG 29KT 4443 9436 

HAIL...1.25IN
WIND...60MPH
 
$$

CTG

4 follow-up statements

238 
WWUS53 KMPX 180048 RRA
SVSMPX

Severe Weather Statement
National Weather Service Twin Cities/Chanhassen MN
748 PM CDT Thu Jun 17 2021

MNC103-143-180130-
/O.CON.KMPX.SV.W.0038.000000T0000Z-210618T0130Z/
Sibley MN-Nicollet MN-
748 PM CDT Thu Jun 17 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 830 PM CDT
FOR SOUTHEASTERN SIBLEY AND NORTHEASTERN NICOLLET COUNTIES...

At 748 PM CDT, a severe thunderstorm was located near Lafayette, or
12 miles northeast of New Ulm, moving east at 35 mph.

HAZARD...60 mph wind gusts and half dollar size hail.

SOURCE...Radar indicated.

IMPACT...Hail damage to vehicles is expected. Expect wind damage to 
         roofs, siding, and trees.

Locations impacted include...
St. Peter, Nicollet, Lafayette, Oshawa, New Sweden, Klossner, Rush
River and Norseland.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4448 9441 4456 9393 4430 9398 4426 9403
      4425 9401 4424 9403 4420 9402 4437 9444
TIME...MOT...LOC 0048Z 270DEG 29KT 4443 9428 

HAIL...1.25IN
WIND...60MPH
 
$$

CTG

653 
WWUS53 KMPX 180053
SVSMPX

Severe Weather Statement
National Weather Service Twin Cities/Chanhassen MN
753 PM CDT Thu Jun 17 2021

MNC103-143-180130-
/O.CON.KMPX.SV.W.0038.000000T0000Z-210618T0130Z/
Sibley MN-Nicollet MN-
753 PM CDT Thu Jun 17 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 830 PM CDT
FOR SOUTHEASTERN SIBLEY AND NORTHEASTERN NICOLLET COUNTIES...

At 753 PM CDT, a severe thunderstorm was located 8 miles south of
Gaylord, or 14 miles northeast of New Ulm, moving east at 35 mph.

HAZARD...60 mph wind gusts and half dollar size hail.

SOURCE...Radar indicated.

IMPACT...Hail damage to vehicles is expected. Expect wind damage to 
         roofs, siding, and trees.

Locations impacted include...
St. Peter, Oshawa, New Sweden, Rush River and Norseland. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4447 9431 4455 9393 4430 9398 4426 9403
      4425 9401 4424 9403 4437 9434
TIME...MOT...LOC 0053Z 270DEG 29KT 4443 9422 

HAIL...1.25IN
WIND...60MPH
 
$$

CTG

279 
WWUS53 KMPX 180102
SVSMPX

Severe Weather Statement
National Weather Service Twin Cities/Chanhassen MN
802 PM CDT Thu Jun 17 2021

MNC103-143-180130-
/O.CON.KMPX.SV.W.0038.000000T0000Z-210618T0130Z/
Sibley MN-Nicollet MN-
802 PM CDT Thu Jun 17 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 830 PM CDT
FOR SOUTH CENTRAL SIBLEY AND NORTHEASTERN NICOLLET COUNTIES...

At 802 PM CDT, a severe thunderstorm was located 9 miles southeast of
Gaylord, or 19 miles north of Mankato, 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.

Locations impacted include...
St. Peter, Rush River and Norseland. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4446 9416 4450 9394 4430 9398 4438 9418
TIME...MOT...LOC 0102Z 270DEG 29KT 4443 9411 

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

CTG

671 
WWUS53 KMPX 180107
SVSMPX

Severe Weather Statement
National Weather Service Twin Cities/Chanhassen MN
807 PM CDT Thu Jun 17 2021

MNC103-143-180117-
/O.CAN.KMPX.SV.W.0038.000000T0000Z-210618T0130Z/
Sibley MN-Nicollet MN-
807 PM CDT Thu Jun 17 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTH CENTRAL SIBLEY AND
NORTHEASTERN NICOLLET COUNTIES IS CANCELLED...
                
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 has been cancelled.

A Severe Thunderstorm Watch remains in effect until 100 AM CDT for
south central and central Minnesota.

LAT...LON 4446 9416 4450 9394 4430 9398 4438 9418
TIME...MOT...LOC 0104Z 270DEG 29KT 4443 9405 

$$

CTG

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 17, 7:02 PM CDT	Severe Thunderstorm Warning	MPX	Dakota, Goodhue, Rice	58 min
Jun 17, 7:06 PM CDT	Severe Thunderstorm Warning	MPX	Carver, Scott, Sibley	42 min
Jun 17, 7:44 PM CDT	Severe Thunderstorm Warning	MPX	Goodhue	32 min
Jun 17, 7:50 PM CDT	Severe Thunderstorm Warning	MPX	Goodhue	55 min
Jun 17, 8:00 PM CDT	Severe Thunderstorm Warning	MPX	Dakota, Goodhue	45 min
Jun 17, 8:28 PM CDT	Severe Thunderstorm Warning	MPX	Goodhue	34 min
Jun 18, 3:21 AM CDT	Red Flag Warning	MPX	Anoka, Benton, Carver, Chippewa, Chisago, Douglas and 20 more	16 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.