Alert archive / Minnesota / Severe Thunderstorm Warnings in 2018

Severe Thunderstorm Warning 147, NWS Twin Cities, MN

September 17, 20184 counties in Minnesota; Pierce County, Wisconsin

NWS Twin Cities, MN issued this severe thunderstorm warning at Sep 17, 2018, 2:17 PM CDT for 4 counties in Minnesota; Pierce County, Wisconsin. It was in force for 43 min. 3 reports 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: Sep 17, 2018, 2:17 PM CDT (19:17 UTC)
Expired: Sep 17, 2018, 3:00 PM CDT
In force: 43 min
Issued by: NWS Twin Cities, MN
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Dakota County, MN, Goodhue County, MN, Rice County, MN, Washington County, MN, Pierce County, WI

The radar

The Minneapolis radar (KMPX), 73 km from the middle of the area, began a volume at 19:19 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.

What was reported inside it

Time	Report	Where	Remark
Sep 17, 2:17 PM CDT	TSTM WND DMG	2 S Lakeville, MN	TREES AND POWERLINES DOWN.
Sep 17, 2:23 PM CDT	TSTM WND DMG	Rosemount, MN	TREES AND POWERLINES DOWN.
Sep 17, 2:40 PM CDT	TSTM WND DMG	Pine Island, MN	LARGE TREE DOWN. MORE THAN A FOOT IN DIAMETER. PHOTO FROM PUBLIC RELAYED, VIA TWITTER, BY MEDIA. TIME ESTIMATED.

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, 7.3 hours before the alert went out and 75 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: 400 J/kg
Mixed-layer CIN: -276 J/kg
Mixed-layer LCL: 1173 m above ground
0-6 km bulk shear: 25 kt
0-1 km storm-relative helicity: 110 m²/s²
0-3 km storm-relative helicity: 106 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

354 
WUUS53 KMPX 171917
SVRMPX
MNC037-049-131-163-WIC093-172000-
/O.NEW.KMPX.SV.W.0147.180917T1917Z-180917T2000Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Twin Cities/Chanhassen MN
217 PM CDT MON SEP 17 2018

The National Weather Service in The Twin Cities has issued a

* Severe Thunderstorm Warning for...
  Dakota County in east central Minnesota...
  Goodhue County in southeastern Minnesota...
  Rice County in south central Minnesota...
  Southwestern Washington County in east central Minnesota...
  Southwestern Pierce County in west central Wisconsin...

* Until 300 PM CDT.

* At 216 PM CDT, severe thunderstorms were located along a line
  extending from Afton State Park to near Dundas, moving east at 45
  mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Law enforcement.

  IMPACT...Expect damage to roofs, siding, and trees.

* Locations impacted include...
  Faribault, Northfield, Red Wing, Eagan, Woodbury, Lakeville, Apple
  Valley, Cottage Grove, Inver Grove Heights, Hastings, Rosemount and
  Farmington.

This includes the following highways...
 Interstate 35 between mile markers 50 and 75.
 U.S. Highway 61 between mile markers 82 and 104.

This includes  Treasure Island Casino.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 4421 9352 4455 9333 4455 9328 4462 9328
      4492 9311 4460 9226 4454 9227 4454 9231
      4445 9228 4445 9243 4437 9243 4436 9255
      4420 9256 4419 9331
TIME...MOT...LOC 1916Z 288DEG 37KT 4488 9278 4438 9314 

HAIL...<.75IN
WIND...60MPH
 
$$

JRB

3 follow-up statements

143 
WWUS53 KMPX 171932
SVSMPX

Severe Weather Statement
National Weather Service Twin Cities/Chanhassen MN
232 PM CDT MON SEP 17 2018

MNC037-049-131-163-WIC093-172000-
/O.CON.KMPX.SV.W.0147.000000T0000Z-180917T2000Z/
Dakota MN-Goodhue MN-Rice MN-Washington MN-Pierce WI-
232 PM CDT MON SEP 17 2018

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 300 PM CDT
FOR DAKOTA...GOODHUE...EASTERN RICE...SOUTHWESTERN WASHINGTON AND
SOUTHWESTERN PIERCE COUNTIES...

At 232 PM CDT, severe thunderstorms were located along a line
extending from River Falls to near Nerstrand, moving east at 45 mph.

HAZARD...60 mph wind gusts.

SOURCE...Law enforcement.

IMPACT...Expect damage to roofs, siding, and trees.

Locations impacted include...
Faribault, Northfield, Red Wing, Woodbury, Cottage Grove, Inver Grove
Heights, Hastings, Rosemount, Farmington, South St. Paul, St. Paul
Park and Prescott.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 4420 9339 4489 9302 4460 9226 4454 9227
      4454 9231 4445 9228 4445 9243 4437 9243
      4436 9255 4420 9256 4419 9331
TIME...MOT...LOC 1932Z 288DEG 37KT 4484 9261 4434 9297 

HAIL...<.75IN
WIND...60MPH
 
$$

AMK

897 
WWUS53 KMPX 171947
SVSMPX

Severe Weather Statement
National Weather Service Twin Cities/Chanhassen MN
247 PM CDT MON SEP 17 2018

MNC163-171956-
/O.CAN.KMPX.SV.W.0147.000000T0000Z-180917T2000Z/
Washington MN-
247 PM CDT MON SEP 17 2018

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN WASHINGTON COUNTY
IS CANCELLED...

The storms which prompted the warning have moved out of the warned 
area. Therefore, the warning has been cancelled.

LAT...LON 4420 9319 4476 9287 4475 9281 4480 9278
      4460 9226 4454 9227 4454 9231 4445 9228
      4445 9243 4437 9243 4436 9255 4420 9256
TIME...MOT...LOC 1946Z 288DEG 37KT 4480 9244 4430 9280 

$$

MNC037-049-131-WIC093-172000-
/O.CON.KMPX.SV.W.0147.000000T0000Z-180917T2000Z/
Dakota MN-Goodhue MN-Rice MN-Pierce WI-
247 PM CDT MON SEP 17 2018

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 300 PM CDT
FOR SOUTHEASTERN DAKOTA...GOODHUE...SOUTHEASTERN RICE AND
SOUTHWESTERN PIERCE COUNTIES...

At 246 PM CDT, severe thunderstorms were located along a line
extending from near Martel to Wanamingo, moving east at 45 mph.

HAZARD...60 mph wind gusts.

SOURCE...Law enforcement.

IMPACT...Expect damage to roofs, siding, and trees.

Locations impacted include...
Red Wing, Hastings, Prescott, Cannon Falls, Pine Island, Zumbrota,
Kenyon, Goodhue, Stanton, Wanamingo, Welch and Bay City.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 4420 9319 4476 9287 4475 9281 4480 9278
      4460 9226 4454 9227 4454 9231 4445 9228
      4445 9243 4437 9243 4436 9255 4420 9256
TIME...MOT...LOC 1946Z 288DEG 37KT 4480 9244 4430 9280 

HAIL...<.75IN
WIND...60MPH
 
$$

AMK

523 
WWUS53 KMPX 171954
SVSMPX

Severe Weather Statement
National Weather Service Twin Cities/Chanhassen MN
254 PM CDT MON SEP 17 2018

MNC037-049-131-WIC093-172004-
/O.EXP.KMPX.SV.W.0147.000000T0000Z-180917T2000Z/
Dakota MN-Goodhue MN-Rice MN-Pierce WI-
254 PM CDT MON SEP 17 2018

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN DAKOTA...
GOODHUE...SOUTHEASTERN RICE AND SOUTHWESTERN PIERCE COUNTIES WILL
EXPIRE AT 300 PM CDT...
    
The storms which prompted the warning have weakened below severe
limits, and have exited the warned area. Therefore, the warning will
be allowed to expire.  However gusty winds are still possible with
these thunderstorms.

LAT...LON 4420 9319 4476 9287 4475 9281 4480 9278
      4460 9226 4454 9227 4454 9231 4445 9228
      4445 9243 4437 9243 4436 9255 4420 9256
TIME...MOT...LOC 1954Z 288DEG 37KT 4479 9238 4429 9274 

$$

AMK

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 17, 11:04 AM CDT	Special Weather Statement	MPX	Lac qui Parle	26 min
Sep 17, 11:30 AM CDT	Special Weather Statement	MPX	Lac qui Parle, Yellow Medicine	30 min
Sep 17, 11:52 AM CDT	Special Weather Statement	MPX	Brown, Chippewa, Kandiyohi, Redwood, Renville, Swift	38 min
Sep 17, 12:28 PM CDT	Special Weather Statement	MPX	Brown, Kandiyohi, McLeod, Meeker, Redwood, Renville and 3 more	47 min
Sep 17, 12:54 PM CDT	Special Weather Statement	MPX	Anoka, Blue Earth, Brown, Carver, Hennepin, Le Sueur and 7 more	51 min
Sep 17, 1:34 PM CDT	Special Weather Statement	MPX	Anoka, Blue Earth, Carver, Chisago, Dakota, Hennepin and 6 more	41 min
Sep 17, 2:08 PM CDT	Special Weather Statement	MPX	Dakota, Faribault, Freeborn, Goodhue, Ramsey, Rice and 3 more	67 min
Sep 17, 3:09 PM CDT	Special Weather Statement	MPX	Freeborn	36 min
Sep 17, 3:22 PM CDT	Special Weather Statement	MPX	Redwood, Renville	23 min
Sep 17, 3:43 PM CDT	Special Weather Statement	MPX	Brown	32 min
Sep 17, 4:03 PM CDT	Severe Thunderstorm Warning	MPX	Blue Earth, Brown, Nicollet, Sibley, Watonwan	27 min
Sep 17, 4:40 PM CDT	Special Weather Statement	MPX	Blue Earth, Le Sueur, Waseca	35 min
Sep 17, 5:02 PM CDT	Special Weather Statement	MPX	Rice, Steele, Waseca	28 min

Nearby

Severe Thunderstorm Warnings in Minnesota, 2018 Severe Thunderstorm Warnings in Wisconsin, 2018 Every severe thunderstorm warning in 2018

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.