Alert archive / Minnesota / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 72, NWS Twin Cities, MN
NWS Twin Cities, MN issued this severe thunderstorm warning at Aug 20, 2021, 4:54 PM CDT for Douglas County, Minnesota. It was in force for 19 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, 4:54 PM CDT (21:54 UTC)
- Expired
- Aug 20, 2021, 5:13 PM CDT
- In force
- 19 min
- Issued by
- NWS Twin Cities, MN
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
County Douglas County, MN
The radar
The Minneapolis radar (KMPX), 183 km from the middle of the area, began a volume at 21:55 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 12:00Z, 9.9 hours before the alert went out and 181 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
- 48 J/kg
- Mixed-layer CIN
- -139 J/kg
- Mixed-layer LCL
- 999 m above ground
- 0-6 km bulk shear
- 20 kt
- 0-1 km storm-relative helicity
- 62 m²/s²
- 0-3 km storm-relative helicity
- 37 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
562 WUUS53 KMPX 202154 SVRMPX MNC041-202230- /O.NEW.KMPX.SV.W.0072.210820T2154Z-210820T2230Z/ BULLETIN - IMMEDIATE BROADCAST REQUESTED Severe Thunderstorm Warning National Weather Service Twin Cities/Chanhassen MN 454 PM CDT Fri Aug 20 2021 The National Weather Service in the Twin Cities has issued a * Severe Thunderstorm Warning for... Eastern Douglas County in west central Minnesota... * Until 530 PM CDT. * At 453 PM CDT, a severe thunderstorm was located over Carlos, or near Alexandria, moving north at 55 mph. HAZARD...60 mph wind gusts. SOURCE...Trained weather spotters. IMPACT...Expect damage to roofs, siding, and trees. * This severe thunderstorm will remain over mainly rural areas of northeastern Douglas County, including the following locations... Nelson, Miltona, Rose City and Belle River. PRECAUTIONARY/PREPAREDNESS ACTIONS... For your protection move to an interior room on the lowest floor of a building. && LAT...LON 4586 9518 4590 9548 4611 9541 4611 9515 TIME...MOT...LOC 2153Z 191DEG 50KT 4596 9534 HAIL THREAT...RADAR INDICATED MAX HAIL SIZE...<.75 IN WIND THREAT...OBSERVED MAX WIND GUST...60 MPH $$ JLT
2 follow-up statements
870
WWUS53 KMPX 202206
SVSMPX
Severe Weather Statement
National Weather Service Twin Cities/Chanhassen MN
506 PM CDT Fri Aug 20 2021
MNC041-202230-
/O.CON.KMPX.SV.W.0072.000000T0000Z-210820T2230Z/
Douglas MN-
506 PM CDT Fri Aug 20 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 530 PM CDT
FOR NORTHEASTERN DOUGLAS COUNTY...
At 505 PM CDT, a severe thunderstorm was located near Parkers
Prairie, or 13 miles north of Alexandria, moving north at 55 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
Locations impacted include...
Miltona.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4600 9517 4601 9541 4608 9542 4610 9541
4610 9516
TIME...MOT...LOC 2205Z 190DEG 46KT 4610 9531
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...OBSERVED
MAX WIND GUST...60 MPH
$$
JLT541
WWUS53 KMPX 202213
SVSMPX
Severe Weather Statement
National Weather Service Twin Cities/Chanhassen MN
513 PM CDT Fri Aug 20 2021
MNC041-202222-
/O.CAN.KMPX.SV.W.0072.000000T0000Z-210820T2230Z/
Douglas MN-
513 PM CDT Fri Aug 20 2021
...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN DOUGLAS COUNTY IS
CANCELLED...
The severe thunderstorm which prompted the warning has moved out of
the warned area. Therefore, the warning has been cancelled. However
gusty winds are still possible with this thunderstorm.
A Severe Thunderstorm Watch remains in effect until 1000 PM CDT for
west 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 4600 9517 4601 9541 4608 9542 4610 9541
4610 9516
TIME...MOT...LOC 2211Z 191DEG 50KT 4620 9528
$$
JLTThe office that day
Everything else NWS Twin Cities, MN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 20, 4:47 PM CDT | Special Weather Statement | MPX | Douglas | 28 min |
| Aug 20, 4:51 PM CDT | Special Weather Statement | MPX | Todd | 39 min |
| Aug 20, 5:04 PM CDT | Special Weather Statement | MPX | Swift | 41 min |
| Aug 20, 5:43 PM CDT | Special Weather Statement | MPX | Chippewa, Pope, Swift | 32 min |
| Aug 20, 5:48 PM CDT | Special Weather Statement | MPX | Renville | 42 min |
| Aug 20, 5:50 PM CDT | Special Weather Statement | MPX | Martin, Watonwan | 40 min |
| Aug 20, 6:16 PM CDT | Special Weather Statement | MPX | Stearns | 44 min |
| Aug 20, 6:21 PM CDT | Severe Thunderstorm Warning | MPX | Pope, Stearns | 39 min |
| Aug 20, 6:53 PM CDT | Tornado Warning | MPX | Stearns | 37 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.