Alert archive / Wisconsin / Special Weather Statements in 2019

Special Weather Statement, NWS Twin Cities, MN

September 11, 20194 counties in Wisconsin

NWS Twin Cities, MN issued this special weather statement at Sep 11, 2019, 6:15 AM CDT for 4 counties in Wisconsin. It was in force for 30 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: Sep 11, 2019, 6:15 AM CDT (11:15 UTC)
Expired: Sep 11, 2019, 6:45 AM CDT
In force: 30 min
Issued by: NWS Twin Cities, MN

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

The radar

The La Crosse radar (KARX), 116 km from the middle of the area, began a volume at 11:19 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 00:00Z, 11.3 hours before the alert went out and 147 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1774 m above ground
0-6 km bulk shear: 33 kt
0-1 km storm-relative helicity: -13 m²/s²
0-3 km storm-relative helicity: 100 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.0

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 Sep 11, 4:31 AM CDT, 1 hour 44 minutes earlier.

Area forecast discussion, Sep 11, 4:31 AM CDT, 1 hour 44 minutes before

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Hazardous weather outlook, Sep 11, 5:16 AM CDT, 59 minutes before

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In the hours before

Special weather statement, Sep 11, 2:09 AM CDT, 4 hours 6 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE Twin Cities/Chanhassen MN
209 AM CDT Wed Sep 11 2019

MNC013-103-110915-
Blue Earth-Nicollet-
209 AM CDT Wed Sep 11 2019

...URBAN AND SMALL STREAM FLOODING EXPECTED...

Thunderstorms with heavy rain will cause minor flooding in the
following counties...

Blue Earth...Nicollet...

* Until 415 AM CDT.

* At 208 AM CDT, Doppler radar indicated heavy rain due to
  thunderstorms. This will cause urban and small stream flooding in
  the area.

* Some locations that will experience flooding include...
  Mankato, North Mankato, Lake Crystal, Judson, Skyline and Mankato
  Airport.

LAT...LON 4424 9388 4406 9389 4406 9420 4424 9421

JLT

Special weather statement, Sep 11, 2:34 AM CDT, 3 hours 41 minutes before

Special Weather Statement
National Weather Service Twin Cities/Chanhassen MN
234 AM CDT Wed Sep 11 2019

MNZ069-076-077-110815-
Le Sueur-Rice-Scott-
234 AM CDT Wed Sep 11 2019

...A STRONG THUNDERSTORM WILL AFFECT LE SUEUR...SOUTHWESTERN SCOTT
AND NORTHWESTERN RICE COUNTIES...

At 234 AM CDT, a strong thunderstorm was located near Cleveland, or 9
miles northeast of Mankato, moving northeast at 35 mph.

Winds in excess of 40 mph and nickel size hail are possible with this
storm.

Locations impacted include...
St. Peter, New Prague, Le Sueur, Lonsdale, Montgomery, Le Center,
Kasota, Elysian, Cleveland, Kilkenny, Heidelberg and St Thomas.

This includes U.S. Highway 169 between mile markers 81 and 83.

Torrential rainfall is also occurring with this storm, and may cause
localized flooding. Do not drive your vehicle through flooded
roadways.

LAT...LON 4421 9377 4424 9377 4424 9402 4430 9398
      4434 9393 4436 9395 4461 9380 4452 9334
      4419 9365
TIME...MOT...LOC 0734Z 218DEG 32KT 4428 9387

JLT

Special weather statement, Sep 11, 3:27 AM CDT, 2 hours 48 minutes before

Special Weather Statement
National Weather Service Twin Cities/Chanhassen MN
327 AM CDT Wed Sep 11 2019

MNZ070-077-078-110915-
Dakota-Rice-Goodhue-
327 AM CDT Wed Sep 11 2019

...A STRONG THUNDERSTORM WILL AFFECT SOUTHEASTERN DAKOTA...GOODHUE
AND NORTHEASTERN RICE COUNTIES...

At 327 AM CDT, a strong thunderstorm was located over Kenyon, or 12
miles east of Faribault, moving northeast at 35 mph.

Winds in excess of 30 mph and dime size hail are possible with this
storm.

Locations impacted include...
Northfield, Red Wing, Hastings, Rosemount, Cannon Falls, Zumbrota,
Kenyon, Dundas, Goodhue, Stanton, Wanamingo and Welch.

This includes the following highways...
 Interstate 35 between mile markers 62 and 66.
 U.S. Highway 61 between mile markers 91 and 104.

Torrential rainfall is also occurring with this storm, and may cause
localized flooding. Do not drive your vehicle through flooded
roadways.

LAT...LON 4439 9334 4477 9297 4458 9255 4457 9255
      4457 9253 4448 9232 4445 9236 4445 9243
      4440 9243 4436 9250 4437 9254 4433 9255
      4420 9274 4419 9301
TIME...MOT...LOC 0827Z 223DEG 29KT 4429 9302

JLT

Special weather statement, Sep 11, 4:13 AM CDT, 2 hours 2 minutes before

Special Weather Statement
National Weather Service Twin Cities/Chanhassen MN
413 AM CDT Wed Sep 11 2019

MNZ078-WIZ024-026-111000-
Goodhue-Pierce-Pepin-
413 AM CDT Wed Sep 11 2019

...A STRONG THUNDERSTORM WILL AFFECT SOUTHEASTERN GOODHUE...WESTERN
PEPIN AND SOUTHEASTERN PIERCE COUNTIES...

At 413 AM CDT, a strong thunderstorm was located near Mazeppa, or 15
miles south of Red Wing, moving northeast at 30 mph.

Winds in excess of 30 mph and nickel size hail are possible with this
storm.

Locations impacted include...
Zumbrota, Goodhue, Pepin, Plum City, Stockholm, Frontenac, Wacouta,
Bellechester, Porcupine, Frontenac State Park, Central Point and
Ella.

This includes U.S. Highway 61 between mile markers 82 and 87.

LAT...LON 4433 9271 4473 9226 4458 9203 4451 9205
      4443 9217 4445 9224 4445 9243 4437 9243
      4436 9255 4422 9255
TIME...MOT...LOC 0913Z 223DEG 28KT 4432 9255

JLT

Special weather statement, Sep 11, 4:29 AM CDT, 1 hour 46 minutes before

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Special weather statement, Sep 11, 6:15 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
Sep 10, 8:11 PM CDT	Flash Flood Watch	MPX	Faribault, Freeborn, Martin, Watonwan	9 hr
Sep 11, 12:57 AM CDT	Special Weather Statement	MPX	Blue Earth, Watonwan	33 min
Sep 11, 1:24 AM CDT	Special Weather Statement	MPX	Brown, Redwood	51 min
Sep 11, 1:34 AM CDT	Special Weather Statement	MPX	Blue Earth	41 min
Sep 11, 2:09 AM CDT	Special Weather Statement	MPX	Blue Earth	2 hr
Sep 11, 2:34 AM CDT	Special Weather Statement	MPX	Le Sueur	41 min
Sep 11, 3:27 AM CDT	Special Weather Statement	MPX	Dakota, Goodhue	48 min
Sep 11, 4:13 AM CDT	Special Weather Statement	MPX	Wabasha	47 min
Sep 11, 4:29 AM CDT	Special Weather Statement	MPX	Blue Earth, Le Sueur, Rice, Steele, Waseca	2 hr
Sep 11, 3:22 PM CDT	Flash Flood Watch	MPX	Anoka, Blue Earth, Brown, Carver, Chippewa, Dakota and 24 more	30 hr
Sep 11, 7:07 AM CDT	Special Weather Statement	MPX	Eau Claire	83 min

Nearby

Special Weather Statements in Wisconsin, 2019 Every special weather statement in 2019

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.