Alert archive / Minnesota / Special Weather Statements in 2018

Special Weather Statement, NWS Twin Cities, MN

September 17, 20189 counties in Minnesota; Dunn County, Pierce County, Saint Croix County, Wisconsin

NWS Twin Cities, MN issued this special weather statement at Sep 17, 2018, 2:08 PM CDT for 9 counties in Minnesota; Dunn County, Pierce County, Saint Croix County, Wisconsin. It was in force for 67 min. 8 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, 2:08 PM CDT (19:08 UTC)
Expired: Sep 17, 2018, 3:15 PM CDT
In force: 67 min
Issued by: NWS Twin Cities, MN

Counties Dakota County, MN, Faribault County, MN, Freeborn County, MN, Goodhue County, MN, Ramsey County, MN, Rice County, MN, Steele County, MN, Waseca County, MN, Washington County, MN, Dunn County, WI, Pierce County, WI, Saint Croix County, WI

The radar

The Minneapolis radar (KMPX), 79 km from the middle of the area, began a volume at 19:08 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, 2:10 PM CDT	TSTM WND DMG	1 N Northfield, MN	ROOF BLOWN OFF OF A TRAILER HOME. TIME ESTIMATED.
Sep 17, 2:10 PM CDT	TSTM WND DMG	4 Wnw Dundas, MN	* 1 INJ * A SHED WAS BLOWN DOWN LEAVING ONE PERSON WITH MINOR INJURIES. TIME ESTIMATED.
Sep 17, 2:10 PM CDT	TSTM WND DMG	8 Sse Lonsdale, MN	BOATS AND DOCKS BLOWN OFF THE SHORE. TIME ESTIMATED.
Sep 17, 2:10 PM CDT	TSTM WND DMG	Farmington, MN	PICTURES ON TWITTER OF AN UPROOTED TREE AND A LARGE BRANCH DOWN OFF ANOTHER TREE. TIME ESTIMATED.
Sep 17, 2:15 PM CDT	TSTM WND DMG	Eagan, MN	TREES AND POWERLINES DOWN.
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, 7.1 hours before the alert went out and 82 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.

629 
WWUS83 KMPX 171908
SPSMPX

Special Weather Statement
National Weather Service Twin Cities/Chanhassen MN
208 PM CDT MON SEP 17 2018

MNZ060>063-069-070-076>078-083>085-092-093-WIZ014-015-023>026-172015-
Le Sueur-Waseca-Blue
Earth-Goodhue-Ramsey-Scott-Steele-Anoka-Washington-Dakota-Rice-
Hennepin-Freeborn-Faribault-Polk-Pierce-St. Croix-Barron-Dunn-Pepin-
208 PM CDT MON SEP 17 2018

...AN AREA OF STRONG THUNDERSTORMS WILL AFFECT SOUTHEASTERN
HENNEPIN...DAKOTA...STEELE...GOODHUE...EAST CENTRAL ANOKA...RICE...
WASECA...FREEBORN...FARIBAULT...SOUTHEASTERN LE SUEUR...EASTERN
SCOTT...SOUTHEASTERN BLUE EARTH...WASHINGTON...RAMSEY...WESTERN
PEPIN...ST. CROIX...PIERCE...WESTERN DUNN...SOUTHWESTERN BARRON AND
SOUTHEASTERN POLK COUNTIES...

At 207 PM CDT, strong thunderstorms were clustered near Randolph, or
11 miles north of Northfield, moving east at 40 mph.

Winds in excess of 30 mph are possible with this storm.

Locations impacted include...
Minneapolis, St. Paul, Owatonna, Faribault, Northfield, Albert Lea,
Red Wing, Menomonie, River Falls, Bloomington, Eagan and Woodbury.

This includes the following highways...
 Interstate 35 between mile markers 1 and 80.
 Interstate 90 between mile markers 122 and 173.
 Interstate 94 in Wisconsin between mile markers 1 and 43.
 U.S. Highway 14 between mile markers 144 and 182.
 U.S. Highway 169 between mile markers 1 and 7.
 U.S. Highway 61 between mile markers 82 and 104.

LAT...LON 4521 9313 4525 9169 4443 9218 4445 9243
      4437 9243 4436 9255 4420 9256 4419 9305
      4350 9305 4350 9415
TIME...MOT...LOC 1907Z 288DEG 34KT 4461 9309 

$$

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, 2:17 PM CDT	Severe Thunderstorm Warning	MPX	Dakota, Goodhue, Rice, Washington	43 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

Special Weather Statements in Minnesota, 2018 Special Weather Statements in Wisconsin, 2018 Every special weather statement 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.