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, 5:50 PM CDT for Martin County, Watonwan County, Minnesota. It was in force for 40 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, 5:50 PM CDT (22:50 UTC)
- Expired
- Aug 20, 2021, 6:30 PM CDT
- In force
- 40 min
- Issued by
- NWS Twin Cities, MN
- Hail
- 0.00 in
- Wind
- 50
Counties Martin County, MN, Watonwan County, MN
The radar
The Minneapolis radar (KMPX), 130 km from the middle of the area, began a volume at 22:51 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, 10.8 hours before the alert went out and 128 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.
642
WWUS83 KMPX 202250
SPSMPX
Special Weather Statement
National Weather Service Twin Cities/Chanhassen MN
550 PM CDT Fri Aug 20 2021
MNZ074-082-083-091-202330-
Brown MN-Blue Earth MN-Watonwan MN-Martin MN-
550 PM CDT Fri Aug 20 2021
...A strong thunderstorm will impact portions of northern Martin,
southeastern Brown, western Blue Earth and Watonwan Counties through
630 PM CDT...
At 550 PM CDT, Doppler radar was tracking a strong thunderstorm near
Trimont, or 14 miles northwest of Fairmont, 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.
This strong thunderstorm will be near...
St. James and Lewisville around 610 PM CDT.
Other locations in the path of this storm include Madelia and Hanska.
This includes the following highways...
Interstate 90 between mile markers 96 and 102.
U.S. Highway 14 between mile markers 97 and 98.
U.S. Highway 169 between mile markers 38 and 50.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
A Severe Thunderstorm Watch remains in effect until 1000 PM CDT for
south central Minnesota.
&&
LAT...LON 4381 9486 4398 9486 4434 9458 4415 9407
4364 9448
TIME...MOT...LOC 2250Z 204DEG 38KT 4379 9467
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, 5:04 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, 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.