Alert archive / Minnesota / Special Weather Statements in 2021

Special Weather Statement, NWS Twin Cities, MN

August 20, 2021Douglas County, Minnesota

NWS Twin Cities, MN issued this special weather statement at Aug 20, 2021, 4:47 PM CDT for Douglas County, Minnesota. It was in force for 28 min. 1 report came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Aug 20, 2021, 4:47 PM CDT (21:47 UTC)
Expired: Aug 20, 2021, 5:15 PM CDT
In force: 28 min
Issued by: NWS Twin Cities, MN
Hail: 0.00 in
Wind: 50

County Douglas County, MN

The radar

The Minneapolis radar (KMPX), 181 km from the middle of the area, began a volume at 21:49 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.

What was reported inside it

Time	Report	Where	Remark
Aug 20, 4:51 PM CDT	TSTM WND GST 60	2 Sw Alexandria, MN	ASOS STATION KAXN ALEXANDRIA MN ASOS.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Minneapolis, MN (KMPX), launched 12:00Z, 9.8 hours before the alert went out and 179 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.

621 
WWUS83 KMPX 202147
SPSMPX

Special Weather Statement
National Weather Service Twin Cities/Chanhassen MN
447 PM CDT Fri Aug 20 2021
 
MNZ041-202215-
Douglas MN-
447 PM CDT Fri Aug 20 2021

...A strong thunderstorm will impact portions of eastern Douglas
County through 515 PM CDT...

At 446 PM CDT, Doppler radar was tracking a strong thunderstorm 6
miles south of Alexandria, moving north 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...
  Alexandria around 450 PM CDT.
  Carlos around 500 PM CDT.

This includes Interstate 94 in Minnesota between mile markers 94 and
113.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building. 

To report severe weather, contact your nearest law enforcement
agency. They will relay your report to the National Weather Service
office in the Twin Cities.

A Severe Thunderstorm Watch remains in effect until 1000 PM CDT for
west central Minnesota.

&&

LAT...LON 4576 9517 4576 9554 4610 9555 4611 9518
      4611 9517
TIME...MOT...LOC 2146Z 183DEG 40KT 4581 9540 

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, 4:51 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, 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.