Alert archive / Minnesota / Special Weather Statements in 2021
Special Weather Statement, NWS Twin Cities, MN
NWS Twin Cities, MN issued this special weather statement at Aug 20, 2021, 5:04 PM CDT for Swift County, Minnesota. It was in force for 41 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, 5:04 PM CDT (22:04 UTC)
- Expired
- Aug 20, 2021, 5:45 PM CDT
- In force
- 41 min
- Issued by
- NWS Twin Cities, MN
- Hail
- 0.00 in
- Wind
- 50
County Swift County, MN
The radar
The Minneapolis radar (KMPX), 169 km from the middle of the area, began a volume at 22:05 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 12:00Z, 10.1 hours before the alert went out and 167 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.
964
WWUS83 KMPX 202204
SPSMPX
Special Weather Statement
National Weather Service Twin Cities/Chanhassen MN
504 PM CDT Fri Aug 20 2021
MNZ054>056-202245-
Chippewa MN-Lac Qui Parle MN-Swift MN-
504 PM CDT Fri Aug 20 2021
...A strong thunderstorm will impact portions of east central Lac qui
Parle, northwestern Chippewa and eastern Swift Counties through 545
PM CDT...
At 504 PM CDT, Doppler radar was tracking a strong thunderstorm near
Milan, or 11 miles northwest of Montevideo, moving northeast at 45
mph.
HAZARD...Wind gusts up to 50 mph.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects.
Locations impacted include...
Benson and Lake Hassel.
This includes the following highways...
U.S. Highway 12 between mile markers 30 and 53.
U.S. Highway 212 between mile markers 30 and 38, and near mile
marker 40.
U.S. Highway 59 near mile marker 107.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
This storm may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.
A Severe Thunderstorm Watch remains in effect until 1000 PM CDT for
west central Minnesota.
&&
LAT...LON 4541 9579 4542 9546 4541 9529 4489 9567
4491 9568 4490 9569 4491 9572 4493 9573
4492 9573 4491 9575 4498 9603
TIME...MOT...LOC 2204Z 210DEG 41KT 4510 9581
MAX HAIL SIZE...0.00 IN
MAX WIND GUST...50 MPH
$$
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, 4:54 PM CDT | Severe Thunderstorm Warning | MPX | Douglas | 19 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
Special Weather Statements in Minnesota, 2021Every special weather statement 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.