Alert archive / Minnesota / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 114, NWS Twin Cities, MN

September 16, 2021Morrison County, Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Sep 16, 2021, 6:25 PM CDT for Morrison County, Minnesota. It was in force for 35 min. 3 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: Sep 16, 2021, 6:25 PM CDT (23:25 UTC)
Expired: Sep 16, 2021, 7:00 PM CDT
In force: 35 min
Issued by: NWS Twin Cities, MN
Area: Storm-based polygon
Tornado: Possible
Hail: 1.5 in
Wind: 60.0 mph

County Morrison County, MN

The radar

The Minneapolis radar (KMPX), 140 km from the middle of the area, began a volume at 23:28 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 16, 6:25 PM CDT	HAIL 2.5	5 Ese Camp Ripley, MN	COCORAHS REPORT. TIME ESTIMATED VIA RADAR.
Sep 16, 6:40 PM CDT	HAIL 2	6 E Camp Ripley, MN	PHOTO ON SOCIAL MEDIA.
Sep 16, 7:02 PM CDT	FUNNEL CLOUD	5 Se Harding, MN	FUNNEL CLOUD JUST TO THE NE OF SPOTTERS LOCATION.

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 16, 5:57 PM CDT	Tornado Watch	SPC	4 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 12:00Z, 11.4 hours before the alert went out and 139 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: 1213 m above ground
0-6 km bulk shear: 36 kt
0-1 km storm-relative helicity: 362 m²/s²
0-3 km storm-relative helicity: 428 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 3.0

Open this sounding in Storm Lab

The text

As transmitted.

576 
WUUS53 KMPX 162325
SVRMPX
MNC097-170000-
/O.NEW.KMPX.SV.W.0114.210916T2325Z-210917T0000Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Twin Cities/Chanhassen MN
625 PM CDT Thu Sep 16 2021

The National Weather Service in the Twin Cities has issued a

* Severe Thunderstorm Warning for...
  Central Morrison County in central Minnesota...

* Until 700 PM CDT.

* At 625 PM CDT, a severe thunderstorm was located 7 miles west of
  Lastrup, or 9 miles northeast of Little Falls, moving northeast at
  55 mph.

  HAZARD...Ping pong ball size hail and 60 mph wind gusts.

  SOURCE...Radar indicated.

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

* This severe thunderstorm will be near...
  Lastrup around 630 PM CDT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Tornado Watch remains in effect until midnight CDT for central and
east central Minnesota.

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

A Tornado Watch remains in effect until midnight CDT for central and
east central Minnesota.

&&

LAT...LON 4603 9381 4593 9428 4607 9440 4616 9418
      4616 9381
TIME...MOT...LOC 2325Z 247DEG 46KT 4606 9421 

TORNADO...POSSIBLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.50 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

BPH

2 follow-up statements

261 
WWUS53 KMPX 162351
SVSMPX

Severe Weather Statement
National Weather Service Twin Cities/Chanhassen MN
651 PM CDT Thu Sep 16 2021

MNC097-170000-
/O.CON.KMPX.SV.W.0114.000000T0000Z-210917T0000Z/
Morrison MN-
651 PM CDT Thu Sep 16 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 700 PM CDT
FOR EAST CENTRAL MORRISON COUNTY...

At 650 PM CDT, a severe thunderstorm was located over Vineland, or 9 
miles southwest of Mille Lacs Lake, moving northeast at 50 mph. 
Storm has a history of producing large hail across Morrison county.

HAZARD...Ping pong ball size hail and 60 mph wind gusts.

SOURCE...Radar indicated.

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

This severe thunderstorm will remain over mainly rural areas of east
central Morrison County, including the following locations...
Harding, Genola and Hillman.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Tornado Watch remains in effect until midnight CDT for central and
east central Minnesota.

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

This storm is producing large hail. SEEK SHELTER NOW inside a sturdy
structure and stay away from windows.

&&

LAT...LON 4596 9413 4616 9411 4616 9381 4603 9381
TIME...MOT...LOC 2350Z 247DEG 46KT 4619 9378 

TORNADO...POSSIBLE
HAIL THREAT...OBSERVED
MAX HAIL SIZE...1.50 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

BPH

470 
WWUS53 KMPX 162359
SVSMPX

Severe Weather Statement
National Weather Service Twin Cities/Chanhassen MN
659 PM CDT Thu Sep 16 2021

MNC097-170008-
/O.EXP.KMPX.SV.W.0114.000000T0000Z-210917T0000Z/
Morrison MN-
659 PM CDT Thu Sep 16 2021

...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL MORRISON COUNTY
WILL EXPIRE AT 700 PM CDT...
        
The storm which prompted the warning has moved out of the area.
Therefore, the warning will be allowed to expire. 

A Tornado Watch remains in effect until midnight CDT for central and
east central Minnesota.

Remember, a Tornado Warning still remains in effect for Morrison and 
Mille Lacs counties. 

LAT...LON 4596 9413 4616 9411 4616 9381 4603 9381
TIME...MOT...LOC 2358Z 247DEG 46KT 4622 9366 

$$

BPH

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 16, 5:45 PM CDT	Tornado Warning	MPX	Morrison, Todd	33 min
Sep 16, 6:14 PM CDT	Special Weather Statement	MPX	Morrison	31 min
Sep 16, 6:26 PM CDT	Severe Thunderstorm Warning Considerable damage threat	MPX	Benton, Morrison, Stearns	49 min
Sep 16, 6:30 PM CDT	Severe Thunderstorm Warning	MPX	Chippewa, Kandiyohi, Swift	45 min
Sep 16, 6:32 PM CDT	Special Weather Statement	MPX	Stearns	43 min
Sep 16, 6:32 PM CDT	Tornado Warning	MPX	Mille Lacs, Morrison	43 min
Sep 16, 6:40 PM CDT	Severe Thunderstorm Warning	MPX	Chippewa, Lac qui Parle, Renville, Yellow Medicine	35 min
Sep 16, 6:48 PM CDT	Severe Thunderstorm Warning	MPX	Stearns	42 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.