Alert archive / Wisconsin / Special Weather Statements in 2020

Special Weather Statement, NWS Twin Cities, MN

August 28, 20204 counties in Wisconsin

NWS Twin Cities, MN issued this special weather statement at Aug 28, 2020, 6:31 AM CDT for 4 counties in Wisconsin. It was in force for 59 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 28, 2020, 6:31 AM CDT (11:31 UTC)
Expired: Aug 28, 2020, 7:30 AM CDT
In force: 59 min
Issued by: NWS Twin Cities, MN

Counties Chippewa County, WI, Dunn County, WI, Eau Claire County, WI, Pepin County, WI

The nearest sounding before it

Minneapolis, MN (KMPX), launched 00:00Z, 11.5 hours before the alert went out and 148 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: 487 J/kg
Mixed-layer CIN: -107 J/kg
Mixed-layer LCL: 1571 m above ground
0-6 km bulk shear: 41 kt
0-1 km storm-relative helicity: 12 m²/s²
0-3 km storm-relative helicity: 109 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.3

Open this sounding in Storm Lab

The text

As transmitted.

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What forecasters said that day

The local office's own words before this special weather statement went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Twin Cities, MN wrote its last area forecast discussion before this special weather statement went out at Aug 28, 6:15 AM CDT, 16 minutes earlier.

Area forecast discussion, Aug 28, 6:15 AM CDT, 16 minutes before

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Hazardous weather outlook, Aug 28, 3:49 AM CDT, 2 hours 42 minutes before

Hazardous Weather Outlook
National Weather Service Twin Cities/Chanhassen MN
349 AM CDT Fri Aug 28 2020

MNZ041>045-047>070-073>078-082>085-091>093-WIZ014>016-023>028-
290900-
Douglas-Todd-Morrison-Mille Lacs-Kanabec-Stevens-Pope-Stearns-
Benton-Sherburne-Isanti-Chisago-Lac Qui Parle-Swift-Chippewa-
Kandiyohi-Meeker-Wright-Hennepin-Anoka-Ramsey-Washington-
Yellow Medicine-Renville-McLeod-Sibley-Carver-Scott-Dakota-
Redwood-Brown-Nicollet-Le Sueur-Rice-Goodhue-Watonwan-Blue Earth-
Waseca-Steele-Martin-Faribault-Freeborn-Polk-Barron-Rusk-
St. Croix-Pierce-Dunn-Pepin-Eau Claire-
349 AM CDT Fri Aug 28 2020

This Hazardous Weather Outlook is for portions of central and
southern Minnesota...and west central Wisconsin.

.DAY ONE...Today and Tonight.

A line of thunderstorms will continue to move west to east
across the area through sunrise. The primary threat will be
damaging wind, but large hail, and an isolated tornado cannot be
ruled out.

.DAYS TWO THROUGH SEVEN...Saturday through Thursday.

Additional thunderstorms are expected Sunday night and Monday.
The threat for severe weather with these storms appears low at
this time.

.SPOTTER INFORMATION STATEMENT...

SKYWARN spotter activation will be needed this morning.

In the hours before

Special weather statement, Aug 28, 4:48 AM CDT, 1 hour 43 minutes before

Special Weather Statement
National Weather Service Twin Cities/Chanhassen MN
448 AM CDT Fri Aug 28 2020

MNZ059>063-067>070-WIZ023-024-281030-
Anoka-Washington-Dakota-Hennepin-Carver-Sibley-Ramsey-Wright-Scott-
Pierce-St. Croix-
448 AM CDT Fri Aug 28 2020

...A LINE OF STORMS WILL AFFECT CENTRAL WRIGHT...HENNEPIN...DAKOTA...
SOUTHEASTERN SIBLEY...SCOTT...ANOKA...CENTRAL CARVER...WASHINGTON...
RAMSEY...NORTHWESTERN PIERCE AND SOUTHWESTERN ST. CROIX COUNTIES...

At 447 AM CDT, radar indicated strong thunderstorms were located
along a line extending from near Maple Lake to near Victoria to near
Henderson. Movement was east at 55 mph.

Wind gusts of 50 to 55 mph are possible with these storms.

These storms will be near...
  Chaska, Chanhassen, Victoria, Carver and Excelsior around 455 AM
  CDT.
  Eden Prairie, Shakopee, Prior Lake and New Prague around 500 AM
  CDT.
  Burnsville, Edina, Savage and Hopkins around 505 AM CDT.
  Apple Valley, Richfield, Elk River, St. Michael and Rogers around
  510 AM CDT.
  Bloomington, Rosemount, Otsego and St. Francis around 515 AM CDT.
  St. Paul, Eagan, Inver Grove Heights, Andover and Ramsey around
  520 AM CDT.
  Cottage Grove, Farmington and St. Paul Park around 525 AM CDT.
  Woodbury, Ham Lake, East Bethel and Afton around 530 AM CDT.

Other locations impacted by these storms include Nowthen,
Robbinsdale, Lake St Croix Beach, Lakeland Shores, North St. Paul,
Flying Cloud Airport, Cedar, Sunfish, Lexington and Oak Park Heights.

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.

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

LAT...LON 4482 9380 4527 9412 4533 9383 4530 9377
      4530 9357 4524 9352 4540 9351 4541 9302
      4530 9302 4529 9291 4489 9264 4452 9298
      4451 9304 4447 9305 4447 9328 4454 9328
      4455 9389 4446 9394
TIME...MOT...LOC 0947Z 262DEG 48KT 4527 9402 4483 9368 4452 9381

NDC

Special weather statement, Aug 28, 5:26 AM CDT, 1 hour 5 minutes before

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Special weather statement, Aug 28, 5:32 AM CDT, 59 minutes before

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Special weather statement, Aug 28, 5:38 AM CDT, 53 minutes before

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Special weather statement, Aug 28, 6:11 AM CDT, 20 minutes before

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Special weather statement, Aug 28, 6:31 AM CDT, 0 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 28, 2:14 AM CDT	Severe Thunderstorm Warning	MPX	Lac qui Parle, Yellow Medicine	61 min
Aug 28, 2:58 AM CDT	Severe Thunderstorm Warning	MPX	Brown, Chippewa, Kandiyohi, Lac qui Parle, Redwood, Renville and 2 more	47 min
Aug 28, 3:44 AM CDT	Severe Thunderstorm Warning	MPX	Brown, McLeod, Nicollet, Redwood, Renville, Sibley	46 min
Aug 28, 3:46 AM CDT	Special Weather Statement	MPX	Kandiyohi, Meeker	44 min
Aug 28, 4:25 AM CDT	Special Weather Statement	MPX	Carver, Le Sueur, Nicollet, Scott, Sibley	35 min
Aug 28, 4:27 AM CDT	Special Weather Statement	MPX	Hennepin, Sherburne, Wright	33 min
Aug 28, 4:48 AM CDT	Special Weather Statement	MPX	Anoka, Carver, Dakota, Hennepin, Ramsey, Scott and 2 more	42 min
Aug 28, 5:26 AM CDT	Special Weather Statement	MPX	Steele, Waseca	34 min
Aug 28, 5:32 AM CDT	Special Weather Statement	MPX	Chisago, Dakota, Washington	28 min
Aug 28, 5:35 AM CDT	Severe Thunderstorm Warning	MPX	Rice, Steele, Waseca	40 min
Aug 28, 5:38 AM CDT	Special Weather Statement	MPX	Faribault	37 min
Aug 28, 6:11 AM CDT	Special Weather Statement	MPX	Goodhue	19 min

Nearby

Special Weather Statements in Wisconsin, 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.