Alert archive / Minnesota / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 74, NWS Twin Cities, MN
NWS Twin Cities, MN issued this severe thunderstorm warning at Aug 20, 2021, 7:06 PM CDT for Morrison County, Todd 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
- Aug 20, 2021, 7:06 PM CDT (00:06 UTC)
- Expired
- Aug 20, 2021, 7:45 PM CDT
- In force
- 39 min
- Issued by
- NWS Twin Cities, MN
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties Morrison County, MN, Todd County, MN
The radar
The Minneapolis radar (KMPX), 145 km from the middle of the area, began a volume at 00:09 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 watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Aug 20, 3:58 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
The nearest sounding before it
Minneapolis, MN (KMPX), launched 00:00Z, 0.1 hours before the alert went out and 143 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.
- Mixed-layer CAPE
- 395 J/kg
- Mixed-layer CIN
- -100 J/kg
- Mixed-layer LCL
- 1368 m above ground
- 0-6 km bulk shear
- 24 kt
- 0-1 km storm-relative helicity
- 233 m²/s²
- 0-3 km storm-relative helicity
- 303 m²/s²
- Significant tornado parameter
- 0.2
- Supercell composite
- 2.4
The text
As transmitted.
861
WUUS53 KMPX 210006
SVRMPX
MNC097-153-210045-
/O.NEW.KMPX.SV.W.0074.210821T0006Z-210821T0045Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Twin Cities/Chanhassen MN
706 PM CDT Fri Aug 20 2021
The National Weather Service in the Twin Cities has issued a
* Severe Thunderstorm Warning for...
Southeastern Todd County in central Minnesota...
West central Morrison County in central Minnesota...
* Until 745 PM CDT.
* At 705 PM CDT, a severe thunderstorm was located over Grey Eagle,
or 18 miles southwest of Little Falls, moving northeast at 30 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
* This severe thunderstorm will be near...
Upsala around 710 PM CDT.
Swanville around 715 PM CDT.
Flensburg around 725 PM CDT.
Other locations in the path of this severe thunderstorm include
Randall.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4603 9427 4577 9466 4577 9491 4578 9491
4616 9467
TIME...MOT...LOC 0005Z 216DEG 28KT 4586 9471
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
JLT4 follow-up statements
606
WWUS53 KMPX 210013
SVSMPX
Severe Weather Statement
National Weather Service Twin Cities/Chanhassen MN
713 PM CDT Fri Aug 20 2021
MNC097-153-210045-
/O.CON.KMPX.SV.W.0074.000000T0000Z-210821T0045Z/
Todd MN-Morrison MN-
713 PM CDT Fri Aug 20 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 745 PM CDT
FOR SOUTHEASTERN TODD AND WEST CENTRAL MORRISON COUNTIES...
At 713 PM CDT, a severe thunderstorm was located over Swanville, or
15 miles west of Little Falls, moving northeast at 30 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
This severe storm will be near...
Flensburg around 720 PM CDT.
Other locations in the path of this severe thunderstorm include
Randall.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4603 9427 4577 9466 4577 9491 4578 9491
4616 9467
TIME...MOT...LOC 0013Z 216DEG 28KT 4591 9466
TORNADO...POSSIBLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
JLT674
WWUS53 KMPX 210026
SVSMPX
Severe Weather Statement
National Weather Service Twin Cities/Chanhassen MN
726 PM CDT Fri Aug 20 2021
MNC097-153-210045-
/O.CON.KMPX.SV.W.0074.000000T0000Z-210821T0045Z/
Todd MN-Morrison MN-
726 PM CDT Fri Aug 20 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 745 PM CDT
FOR SOUTHEASTERN TODD AND WEST CENTRAL MORRISON COUNTIES...
At 724 PM CDT, a severe thunderstorm was located over Swanville, or
12 miles west of Little Falls, moving northeast at 30 mph. An
additional severe thunderstorm was moving into far southeast Todd
County where a tornado warning was in effect earlier. Please be
aware the second storm moving into southeast Todd County has had a
history of brief tornado touchdowns across Stearns County earlier.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
This severe storm will be near...
Flensburg around 730 PM CDT.
Other locations in the path of this severe thunderstorm include
Randall.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4603 9427 4577 9466 4577 9491 4578 9491
4616 9467
TIME...MOT...LOC 0024Z 215DEG 24KT 4596 9461
TORNADO...POSSIBLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
JLT664
WWUS53 KMPX 210033
SVSMPX
Severe Weather Statement
National Weather Service Twin Cities/Chanhassen MN
733 PM CDT Fri Aug 20 2021
MNC097-153-210045-
/O.CON.KMPX.SV.W.0074.000000T0000Z-210821T0045Z/
Todd MN-Morrison MN-
733 PM CDT Fri Aug 20 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 745 PM CDT
FOR SOUTHEASTERN TODD AND WEST CENTRAL MORRISON COUNTIES...
At 733 PM CDT, a severe thunderstorm was located near Flensburg, or
10 miles west of Little Falls, moving northeast at 30 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
Locations impacted include...
Randall.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4603 9427 4577 9466 4577 9491 4578 9491
4616 9467
TIME...MOT...LOC 0033Z 215DEG 24KT 4598 9459
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
JLT289
WWUS53 KMPX 210040
SVSMPX
Severe Weather Statement
National Weather Service Twin Cities/Chanhassen MN
740 PM CDT Fri Aug 20 2021
MNC097-153-210050-
/O.EXP.KMPX.SV.W.0074.000000T0000Z-210821T0045Z/
Todd MN-Morrison MN-
740 PM CDT Fri Aug 20 2021
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN TODD AND WEST
CENTRAL MORRISON COUNTIES WILL EXPIRE AT 745 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.
A Severe Thunderstorm Watch remains in effect until 1000 PM CDT for
central Minnesota.
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 4603 9427 4577 9466 4577 9491 4578 9491
4616 9467
TIME...MOT...LOC 0040Z 216DEG 28KT 4602 9455
$$
JLTThe office that day
Everything else NWS Twin Cities, MN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 20, 7:13 PM CDT | Special Weather Statement | MPX | Faribault | 32 min |
| Aug 20, 7:51 PM CDT | Special Weather Statement | MPX | Faribault | 24 min |
| Aug 20, 8:59 PM CDT | Special Weather Statement | MPX | Carver | 46 min |
Nearby
Severe Thunderstorm Warnings in Minnesota, 2021Every 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.