Alert archive / Minnesota / Tornado Warnings in 2020

Tornado Warning 46, NWS Twin Cities, MN

August 22, 2020Benton County, Mille Lacs County, Morrison County, Minnesota

NWS Twin Cities, MN issued this tornado warning at Aug 22, 2020, 10:36 PM CDT for Benton County, Mille Lacs County, Morrison County, Minnesota. It was in force for 24 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 22, 2020, 10:36 PM CDT (03:36 UTC)
Expired: Aug 22, 2020, 11:00 PM CDT
In force: 24 min
Issued by: NWS Twin Cities, MN
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 0.75 in

Counties Benton County, MN, Mille Lacs County, MN, Morrison County, MN

The radar

The Minneapolis radar (KMPX), 119 km from the middle of the area, began a volume at 03:36 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 00:00Z, 3.6 hours before the alert went out and 118 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: 462 J/kg
Mixed-layer CIN: -29 J/kg
Mixed-layer LCL: 1416 m above ground
0-6 km bulk shear: 34 kt
0-1 km storm-relative helicity: 30 m²/s²
0-3 km storm-relative helicity: 85 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.9

Open this sounding in Storm Lab

The text

As transmitted.

375 
WFUS53 KMPX 230336
TORMPX
MNC009-095-097-230400-
/O.NEW.KMPX.TO.W.0046.200823T0336Z-200823T0400Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Twin Cities/Chanhassen MN
1036 PM CDT Sat Aug 22 2020

The National Weather Service in the Twin Cities has issued a

* Tornado Warning for...
  West central Mille Lacs County in east central Minnesota...
  Northeastern Benton County in central Minnesota...
  Southeastern Morrison County in central Minnesota...

* Until 1100 PM CDT.
    
* At 1036 PM CDT, a severe thunderstorm capable of producing a
  tornado was located 12 miles southeast of Pierz, or 24 miles east
  of Little Falls, moving southeast at 20 mph.

  HAZARD...Tornado.

  SOURCE...Radar indicated rotation.

  IMPACT...Flying debris will be dangerous to those caught without 
           shelter. Mobile homes will be damaged or destroyed. 
           Damage to roofs, windows, and vehicles will occur. Tree 
           damage is likely.

* This tornadic thunderstorm will remain over mainly rural areas of
  west central Mille Lacs, northeastern Benton and southeastern
  Morrison Counties, including the following locations... Granite
  Ledge and Rum River.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.

&&

LAT...LON 4598 9377 4581 9366 4575 9393 4593 9395
      4596 9386
TIME...MOT...LOC 0336Z 334DEG 17KT 4590 9386 

TORNADO...RADAR INDICATED
HAIL...<.75IN

$$

Borghoff

2 follow-up statements

412 
WWUS53 KMPX 230345
SVSMPX

Severe Weather Statement
National Weather Service Twin Cities/Chanhassen MN
1045 PM CDT Sat Aug 22 2020

MNC009-095-097-230400-
/O.CON.KMPX.TO.W.0046.000000T0000Z-200823T0400Z/
Mille Lacs MN-Benton MN-Morrison MN-
1045 PM CDT Sat Aug 22 2020

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 1100 PM CDT FOR WEST
CENTRAL MILLE LACS...NORTHEASTERN BENTON AND SOUTHEASTERN MORRISON
COUNTIES...
    
At 1045 PM CDT, a severe thunderstorm capable of producing a tornado
was located 11 miles northwest of Foreston, or 25 miles east of
Little Falls, moving south at 15 mph.

HAZARD...Tornado and quarter size hail.

SOURCE...Radar indicated rotation.

IMPACT...Flying debris will be dangerous to those caught without 
         shelter. Mobile homes will be damaged or destroyed. Damage 
         to roofs, windows, and vehicles will occur. Tree damage is 
         likely.

This tornadic thunderstorm will remain over mainly rural areas of
west central Mille Lacs, northeastern Benton and southeastern
Morrison Counties, including the following locations... Granite Ledge
and Rum River.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.

&&

LAT...LON 4593 9378 4581 9368 4575 9393 4590 9393
TIME...MOT...LOC 0345Z 348DEG 14KT 4587 9385 

TORNADO...RADAR INDICATED
HAIL...1.00IN

$$

Borghoff

517 
WWUS53 KMPX 230350
SVSMPX

Severe Weather Statement
National Weather Service Twin Cities/Chanhassen MN
1050 PM CDT Sat Aug 22 2020

MNC009-095-097-230400-
/O.EXP.KMPX.TO.W.0046.000000T0000Z-200823T0400Z/
Mille Lacs MN-Benton MN-Morrison MN-
1050 PM CDT Sat Aug 22 2020

...THE TORNADO WARNING FOR WEST CENTRAL MILLE LACS...NORTHEASTERN
BENTON AND SOUTHEASTERN MORRISON COUNTIES WILL EXPIRE AT 1100 PM
CDT...
                
The storm which prompted the warning has weakened below severe
limits, and no longer appears capable of producing a tornado.
Therefore, the warning will be allowed to expire.

To report severe weather, contact your nearest law enforcement
agency. They will relay your report to the National Weather Service
the Twin Cities.

LAT...LON 4593 9378 4581 9368 4575 9393 4590 9393
TIME...MOT...LOC 0350Z 334DEG 17KT 4585 9384 

$$

Borghoff

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 22, 8:24 PM CDT	Special Weather Statement	MPX	Mille Lacs	66 min
Aug 22, 8:50 PM CDT	Severe Thunderstorm Warning	MPX	Mille Lacs	27 min
Aug 22, 9:46 PM CDT	Special Weather Statement	MPX	Mille Lacs	44 min
Aug 22, 10:14 PM CDT	Special Weather Statement	MPX	Stearns	46 min
Aug 22, 10:37 PM CDT	Severe Thunderstorm Warning	MPX	Benton, Morrison, Stearns	28 min

Nearby

Tornado Warnings in Minnesota, 2020 Every tornado warning in 2020 Tornadoes 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.