Alert archive / Minnesota / Special Weather Statements in 2021

Special Weather Statement, NWS Twin Cities, MN

August 20, 2021Todd County, Minnesota

NWS Twin Cities, MN issued this special weather statement at Aug 20, 2021, 4:51 PM CDT for 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, 4:51 PM CDT (21:51 UTC)
Expired: Aug 20, 2021, 5:30 PM CDT
In force: 39 min
Issued by: NWS Twin Cities, MN
Hail: 0.00 in
Wind: 50

County Todd County, MN

The radar

The Minneapolis radar (KMPX), 151 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 nearest sounding before it

Minneapolis, MN (KMPX), launched 12:00Z, 9.9 hours before the alert went out and 149 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: 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

Open this sounding in Storm Lab

The text

As transmitted.

798 
WWUS83 KMPX 202151
SPSMPX

Special Weather Statement
National Weather Service Twin Cities/Chanhassen MN
451 PM CDT Fri Aug 20 2021
 
MNZ041-042-048-049-202230-
Stearns MN-Pope MN-Douglas MN-Todd MN-
451 PM CDT Fri Aug 20 2021

...A strong thunderstorm will impact portions of east central
Douglas, eastern Pope, southern Todd and northwestern Stearns
Counties through 530 PM CDT...

At 451 PM CDT, trained weather spotters reported a strong
thunderstorm over Brooten, or 27 miles north of Willmar, moving north
at 45 mph.

HAZARD...Wind gusts up to 50 mph.

SOURCE...Trained weather spotters.

IMPACT...Gusty winds could knock down tree limbs and blow around 
         unsecured objects.

Locations impacted include...
  Sauk Centre, Lake Osakis and Long Prairie.

This includes the following highways...
 Interstate 94 in Minnesota between mile markers 115 and 133.
 U.S. Highway 71 between mile markers 145 and 190.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building. 

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
central and west central Minnesota.

&&

LAT...LON 4598 9465 4595 9465 4542 9500 4542 9529
      4576 9516 4611 9516
TIME...MOT...LOC 2151Z 198DEG 39KT 4552 9514 

MAX HAIL SIZE...0.00 IN
MAX WIND GUST...50 MPH

$$

JLT

The 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, 4:54 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, 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 Tornado observed	MPX	Stearns	37 min

Nearby

Special Weather Statements in Minnesota, 2021 Every 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.