Alert archive / Minnesota / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 119, NWS Twin Cities, MN

July 9, 20174 counties in Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Jul 9, 2017, 8:56 PM CDT for 4 counties in Minnesota. It was in force for 34 min. 4 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: Jul 9, 2017, 8:56 PM CDT (01:56 UTC)
Expired: Jul 9, 2017, 9:30 PM CDT
In force: 34 min
Issued by: NWS Twin Cities, MN
Area: Storm-based polygon
Hail: 1.5 in
Wind: 60.0 mph

Counties Dakota County, MN, Le Sueur County, MN, Rice County, MN, Scott County, MN

The radar

The Minneapolis radar (KMPX), 23 km from the middle of the area, began a volume at 01:54 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
Jul 9, 9:00 PM CDT	TSTM WND DMG	2 E Prior Lake, MN	TREES DOWN IN CREDIT RIVER TOWNSHIP. PHOTO FROM SOCIAL MEDIA. TIME ESTIMATED FROM RADAR.
Jul 9, 9:08 PM CDT	HAIL 1	Apple Valley, MN
Jul 9, 9:12 PM CDT	HAIL 1	Lakeville, MN
Jul 9, 9:20 PM CDT	HAIL 1	1 Nne Lakeville, MN

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Jul 9, 7:05 PM CDT	Tornado Watch	SPC	7 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 00:00Z, 1.9 hours before the alert went out and 23 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: 627 J/kg
Mixed-layer CIN: -187 J/kg
Mixed-layer LCL: 1764 m above ground
0-6 km bulk shear: 45 kt
0-1 km storm-relative helicity: 222 m²/s²
0-3 km storm-relative helicity: 278 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 3.6

Open this sounding in Storm Lab

The text

As transmitted.

878 
WUUS53 KMPX 100156
SVRMPX
MNC037-079-131-139-100230-
/O.NEW.KMPX.SV.W.0119.170710T0156Z-170710T0230Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Twin Cities/Chanhassen MN
856 PM CDT SUN JUL 9 2017

The National Weather Service in The Twin Cities has issued a

* Severe Thunderstorm Warning for...
  Southwestern Dakota County in east central Minnesota...
  Northeastern Le Sueur County in south central Minnesota...
  Scott County in east central Minnesota...
  Northern Rice County in south central Minnesota...

* Until 930 PM CDT

* At 856 PM CDT, a severe thunderstorm was located over Credit River,
  or 17 miles northwest of Northfield, moving southeast at 60 mph.

  HAZARD...Ping pong ball size hail and 60 mph wind gusts. 

  SOURCE...Radar indicated. 

  IMPACT...People and animals outdoors will be injured. Expect hail 
           damage to roofs, siding, windows, and vehicles. Expect 
           wind damage to roofs, siding, and trees. 

* This severe thunderstorm will be near,
  Lakeville and Elko New Market around 900 PM CDT. 
  Webster around 905 PM CDT. 
  Northfield and Dundas around 915 PM CDT. 

Other locations impacted by this severe thunderstorm include Castle
Rock, Helena, Bridgewater, Marystown, Lakeville Airport, Veseli,
Credit River, Heidelberg, St Benedict and Mn Valley State Rec Area.

This includes Interstate 35 between mile markers 65 and 80.
 
This includes  Mystic Lake Casino.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

A tornado watch remains in effect until 100 AM CDT for south central
and east central Minnesota.

LAT...LON 4467 9371 4470 9367 4471 9362 4474 9363
      4475 9362 4479 9324 4442 9310 4435 9363
TIME...MOT...LOC 0156Z 311DEG 50KT 4465 9337 

HAIL...1.50IN
WIND...60MPH
 
$$

jrb

1 follow-up statement

036 
WWUS53 KMPX 100213
SVSMPX

Severe Weather Statement
National Weather Service Twin Cities/Chanhassen MN
913 PM CDT SUN JUL 9 2017

MNC037-079-131-139-100230-
/O.CON.KMPX.SV.W.0119.000000T0000Z-170710T0230Z/
Dakota MN-Le Sueur MN-Scott MN-Rice MN-
913 PM CDT SUN JUL 9 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 930 PM CDT
FOR SOUTHWESTERN DAKOTA...NORTHEASTERN LE SUEUR...SOUTHEASTERN SCOTT
AND NORTHERN RICE COUNTIES...

At 913 PM CDT, a severe thunderstorm was located near Northfield,
moving southeast at 60 mph.

HAZARD...Ping pong ball size hail and 60 mph wind gusts. 

SOURCE...Radar indicated. 

IMPACT...People and animals outdoors will be injured. Expect hail 
         damage to roofs, siding, windows, and vehicles. Expect wind 
         damage to roofs, siding, and trees. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

A tornado watch remains in effect until 100 AM CDT for south central
and east central Minnesota.

LAT...LON 4461 9370 4475 9323 4442 9310 4435 9363
TIME...MOT...LOC 0213Z 311DEG 50KT 4449 9311 

HAIL...1.50IN
WIND...60MPH
 
$$

jrb

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 9, 7:35 PM CDT	Severe Thunderstorm Warning	MPX	Stevens, Swift	40 min
Jul 9, 7:50 PM CDT	Severe Thunderstorm Warning	MPX	Mille Lacs, Morrison	40 min
Jul 9, 7:51 PM CDT	Severe Thunderstorm Warning	MPX	McLeod, Meeker, Renville	39 min
Jul 9, 7:57 PM CDT	Tornado Warning	MPX	Stevens, Swift	33 min
Jul 9, 8:09 PM CDT	Tornado Warning	MPX	Swift	28 min
Jul 9, 8:21 PM CDT	Tornado Warning	MPX	Chippewa, Lac qui Parle	39 min
Jul 9, 8:22 PM CDT	Severe Thunderstorm Warning	MPX	Benton, Morrison	38 min
Jul 9, 8:25 PM CDT	Severe Thunderstorm Warning	MPX	Kanabec, Mille Lacs	40 min
Jul 9, 8:28 PM CDT	Special Weather Statement	MPX	McLeod, Scott	47 min
Jul 9, 8:33 PM CDT	Severe Thunderstorm Warning	MPX	McLeod, Renville, Sibley	42 min
Jul 9, 8:54 PM CDT	Severe Thunderstorm Warning	MPX	Chippewa, Lac qui Parle, Yellow Medicine	66 min
Jul 9, 8:55 PM CDT	Severe Thunderstorm Warning	MPX	Benton, Sherburne	25 min
Jul 9, 8:58 PM CDT	Severe Thunderstorm Warning	MPX	Chippewa, Swift	47 min
Jul 9, 9:03 PM CDT	Severe Thunderstorm Warning	MPX	Nicollet, Sibley	42 min
Jul 9, 9:06 PM CDT	Severe Thunderstorm Warning	MPX	Kandiyohi, Pope, Stearns	27 min
Jul 9, 9:09 PM CDT	Severe Thunderstorm Warning	MPX	Chippewa, Lac qui Parle, Swift	20 min
Jul 9, 9:11 PM CDT	Severe Thunderstorm Warning	MPX	Blue Earth, Le Sueur, Nicollet, Waseca	49 min
Jul 9, 9:16 PM CDT	Severe Thunderstorm Warning	MPX	Dakota, Hennepin, Ramsey, Washington	44 min
Jul 9, 9:23 PM CDT	Severe Thunderstorm Warning	MPX	Dakota, Rice, Scott	53 min
Jul 9, 9:26 PM CDT	Severe Thunderstorm Warning	MPX	Blue Earth, Brown, Nicollet	49 min
Jul 9, 9:30 PM CDT	Tornado Warning	MPX	Nicollet	30 min
Jul 9, 9:51 PM CDT	Severe Thunderstorm Warning	MPX	Blue Earth, Steele, Waseca	54 min
Jul 9, 10:10 PM CDT	Severe Thunderstorm Warning	MPX	Blue Earth, Nicollet	35 min
Jul 9, 10:19 PM CDT	Tornado Warning	MPX	Blue Earth	41 min
Jul 9, 10:34 PM CDT	Severe Thunderstorm Warning	MPX	Nicollet, Sibley	41 min
Jul 9, 10:41 PM CDT	Severe Thunderstorm Warning	MPX	Faribault, Freeborn, Steele, Waseca	64 min
Jul 9, 10:51 PM CDT	Severe Thunderstorm Warning	MPX	McLeod, Renville, Sibley	39 min
Jul 9, 10:55 PM CDT	Severe Thunderstorm Warning	MPX	Brown, Redwood, Renville	35 min
Jul 9, 11:05 PM CDT	Severe Thunderstorm Warning	MPX	Blue Earth	40 min
Jul 9, 11:17 PM CDT	Severe Thunderstorm Warning	MPX	Faribault, Freeborn	43 min
Jul 9, 11:39 PM CDT	Severe Thunderstorm Warning	MPX	Blue Earth, Brown, Nicollet, Watonwan	37 min
Jul 9, 11:55 PM CDT	Severe Thunderstorm Warning	MPX	Redwood	18 min
Jul 10, 12:05 AM CDT	Severe Thunderstorm Warning	MPX	Blue Earth, Faribault, Martin	40 min
Jul 10, 12:45 AM CDT	Severe Thunderstorm Warning	MPX	Faribault, Freeborn	30 min
Jul 10, 12:47 AM CDT	Severe Thunderstorm Warning	MPX	Nicollet	26 min
Jul 10, 1:30 AM CDT	Severe Thunderstorm Warning	MPX	Blue Earth, Brown, Watonwan	35 min

Nearby

Severe Thunderstorm Warnings in Minnesota, 2017 Every severe thunderstorm warning in 2017

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.