Alert archive / Minnesota / Special Weather Statements in 2020

Special Weather Statement, NWS Twin Cities, MN

August 12, 2020Lac qui Parle County, Minnesota

NWS Twin Cities, MN issued this special weather statement at Aug 12, 2020, 5:21 AM CDT for Lac qui Parle 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 12, 2020, 5:21 AM CDT (10:21 UTC)
Expired: Aug 12, 2020, 6:00 AM CDT
In force: 39 min
Issued by: NWS Twin Cities, MN

County Lac qui Parle County, MN

The radar

The Aberdeen radar (KABR), 175 km from the middle of the area, began a volume at 10:21 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

Aberdeen, SD (KABR), launched 00:00Z, 10.4 hours before the alert went out and 175 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: 731 J/kg
Mixed-layer CIN: -222 J/kg
Mixed-layer LCL: 1646 m above ground
0-6 km bulk shear: 33 kt
0-1 km storm-relative helicity: 82 m²/s²
0-3 km storm-relative helicity: 166 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 4.1

Open this sounding in Storm Lab

The text

As transmitted.

148 
WWUS83 KMPX 121021
SPSMPX

Special Weather Statement
National Weather Service Twin Cities/Chanhassen MN
521 AM CDT Wed Aug 12 2020

MNZ054-055-121100-
Lac Qui Parle-Swift-
521 AM CDT Wed Aug 12 2020

...A LINE OF STORMS WILL AFFECT LAC QUI PARLE AND WESTERN SWIFT
COUNTIES...

At 521 AM CDT, radar indicated strong thunderstorms were located
along a line extending from near Lagoona Beach to 8 miles southeast
of Milbank to Tunerville. Movement was east at 45 mph.

Winds in excess of 30 mph are possible with these storms.

These storms will be near...
  Bellingham around 535 AM CDT.
  Marietta around 540 AM CDT.
  Lake Oliver around 545 AM CDT.
  Madison and Appleton around 555 AM CDT.

Other locations impacted by these storms include Louisburg, Nassau,
Big Stone National Wildlife Refuge, Madison Airport, Florida Creek
Wildlife Management Area and Appleton Airport.

Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

LAT...LON 4526 9645 4525 9629 4522 9627 4519 9617
      4519 9612 4518 9610 4524 9610 4524 9612
      4541 9612 4541 9592 4505 9608 4480 9623
      4480 9645
TIME...MOT...LOC 1021Z 268DEG 38KT 4539 9641 4517 9648 4489 9666 

$$

Borghoff

The office that day

Everything else NWS Twin Cities, MN issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Aug 12, 5:55 AM CDT	Special Weather Statement	MPX	Stevens	35 min
Aug 12, 5:57 AM CDT	Special Weather Statement	MPX	Lac qui Parle, Swift	33 min
Aug 12, 6:04 AM CDT	Severe Thunderstorm Warning	MPX	Lac qui Parle, Yellow Medicine	30 min
Aug 12, 6:45 AM CDT	Special Weather Statement	MPX	Chippewa, Kandiyohi, Pope, Swift, Yellow Medicine	45 min
Aug 12, 7:34 AM CDT	Special Weather Statement	MPX	Kandiyohi, Meeker, Renville, Stearns	56 min
Aug 12, 8:14 AM CDT	Special Weather Statement	MPX	Brown, McLeod, Meeker	46 min
Aug 12, 8:17 AM CDT	Severe Thunderstorm Warning	MPX	Brown, Nicollet, Redwood, Renville, Sibley	43 min
Aug 12, 9:02 AM CDT	Special Weather Statement	MPX	Brown, Nicollet, Watonwan	73 min
Aug 12, 9:09 AM CDT	Special Weather Statement	MPX	Faribault	51 min
Aug 12, 9:37 AM CDT	Special Weather Statement	MPX	Blue Earth, Faribault, Le Sueur, Nicollet	53 min
Aug 12, 10:31 AM CDT	Special Weather Statement	MPX	Blue Earth, Le Sueur, Rice, Steele, Waseca	59 min
Aug 12, 11:16 AM CDT	Special Weather Statement	MPX	Waseca	44 min
Aug 12, 11:55 AM CDT	Special Weather Statement	MPX	Freeborn	35 min
Aug 12, 1:02 PM CDT	Special Weather Statement	MPX	Sherburne	43 min
Aug 12, 3:02 PM CDT	Special Weather Statement	MPX	Benton	43 min
Aug 12, 3:46 PM CDT	Special Weather Statement	MPX	Sherburne	44 min

Nearby

Special Weather Statements in Minnesota, 2020 Every special weather statement in 2020

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.