Alert archive / Minnesota / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 190, NWS Twin Cities, MN

September 4, 2017Carver County, Hennepin County, Scott County, Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Sep 4, 2017, 6:56 PM CDT for Carver County, Hennepin County, Scott County, Minnesota. It was in force for 31 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 4, 2017, 6:56 PM CDT (23:56 UTC)
Expired: Sep 4, 2017, 7:27 PM CDT
In force: 31 min
Issued by: NWS Twin Cities, MN
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Carver County, MN, Hennepin County, MN, Scott County, MN

The radar

The Minneapolis radar (KMPX), 7 km from the middle of the area, began a volume at 23:58 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 12:00Z, 11.9 hours before the alert went out and 5 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: 1294 m above ground
0-6 km bulk shear: 56 kt
0-1 km storm-relative helicity: -227 m²/s²
0-3 km storm-relative helicity: -186 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

617 
WUUS53 KMPX 042356
SVRMPX
MNC019-053-139-050045-
/O.NEW.KMPX.SV.W.0190.170904T2356Z-170905T0045Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Twin Cities/Chanhassen MN
656 PM CDT MON SEP 4 2017

The National Weather Service in The Twin Cities has issued a

* Severe Thunderstorm Warning for...
  Southern Hennepin County in east central Minnesota...
  Eastern Scott County in east central Minnesota...
  Carver County in east central Minnesota...

* Until 745 PM CDT

* At 655 PM CDT, severe thunderstorms were located along a line
  extending from near Loretto to New Germany, moving southeast at 45
  mph.

  HAZARD...60 mph wind gusts. 

  SOURCE...Radar indicated. 

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

* Severe thunderstorms will be near,
  Medina and Maple Plain around 700 PM CDT. 
  Waconia, Mound, Orono, Minnetrista and Norwood Young America 
  around 705 PM CDT. 
  Chanhassen, Victoria, Wayzata, Excelsior and Cologne around 710 PM 
  CDT. 
  Minnetonka, St. Louis Park, Hopkins and Carver around 715 PM CDT. 
  Eden Prairie and Edina around 720 PM CDT. 
  Shakopee, Richfield, Savage, Prior Lake and Jordan around 725 PM 
  CDT. 
  Bloomington and Burnsville around 730 PM CDT. 

This includes Mystic Lake Casino.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

If on or near a lake, get away from the water and move indoors or 
inside a vehicle. Remember, lightning can strike out to 15 miles 
from the parent thunderstorm. If you can hear thunder, you are close 
enough to be struck by lightning. Move to safe shelter now!  Do not 
be caught on the water in a thunderstorm.

&&

LAT...LON 4468 9377 4468 9380 4484 9401 4489 9401
      4498 9385 4498 9377 4503 9377 4510 9368
      4488 9319 4481 9325 4479 9333 4473 9333
      4454 9362
TIME...MOT...LOC 2355Z 315DEG 39KT 4506 9368 4488 9395 

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

BORGHOFF

3 follow-up statements

824 
WWUS53 KMPX 050010
SVSMPX

Severe Weather Statement
National Weather Service Twin Cities/Chanhassen MN
710 PM CDT MON SEP 4 2017

MNC019-053-139-050045-
/O.CON.KMPX.SV.W.0190.000000T0000Z-170905T0045Z/
Hennepin MN-Scott MN-Carver MN-
710 PM CDT MON SEP 4 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 745 PM CDT
FOR SOUTHERN HENNEPIN...EASTERN SCOTT AND CENTRAL CARVER COUNTIES...

At 710 PM CDT, severe thunderstorms were located along a line
extending from Woodland to Victoria to Cologne, moving southeast at
45 mph.

HAZARD...60 mph wind gusts. 

SOURCE...Radar indicated. 

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

These severe storms will be near...
  Minnetonka, St. Louis Park, Chaska, Chanhassen and Hopkins around 
  715 PM CDT. 
  Eden Prairie, Edina and Carver around 720 PM CDT. 
  Shakopee, Richfield, Savage, Jordan and MSP International Airport 
  around 725 PM CDT. 
  Bloomington, Burnsville and Prior Lake around 730 PM CDT. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If on or near a lake, get away from the water and move indoors or 
inside a vehicle. remember, lightning can strike out to 15 miles 
from the parent thunderstorm. If you can hear thunder, you are close 
enough to be struck by lightning. Move to safe shelter now!  Do not 
be caught on the water in a thunderstorm.

&&

LAT...LON 4468 9377 4480 9388 4489 9371 4494 9361
      4500 9355 4488 9319 4481 9325 4479 9333
      4473 9333 4454 9362
TIME...MOT...LOC 0010Z 314DEG 39KT 4495 9353 4486 9366 4478 9380 

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

BORGHOFF

529 
WWUS53 KMPX 050020
SVSMPX

Severe Weather Statement
National Weather Service Twin Cities/Chanhassen MN
720 PM CDT MON SEP 4 2017

MNC019-050030-
/O.CAN.KMPX.SV.W.0190.000000T0000Z-170905T0045Z/
Carver MN-
720 PM CDT MON SEP 4 2017

...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL CARVER COUNTY IS
CANCELLED...
    
The severe thunderstorm which prompted the warning has moved out of 
the warned area. Therefore, the warning has been cancelled.

LAT...LON 4472 9363 4474 9363 4476 9362 4480 9357
      4481 9352 4484 9352 4487 9348 4478 9332
      4473 9333 4461 9350
TIME...MOT...LOC 0020Z 313DEG 47KT 4476 9349 

$$

MNC053-139-050045-
/O.CON.KMPX.SV.W.0190.000000T0000Z-170905T0045Z/
Hennepin MN-Scott MN-
720 PM CDT MON SEP 4 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 745 PM CDT
FOR SOUTH CENTRAL HENNEPIN AND NORTHEASTERN SCOTT COUNTIES...

At 720 PM CDT, a severe thunderstorm was located over Shakopee, or 17
miles southwest of Minneapolis, moving southeast at 55 mph.

HAZARD...60 mph wind gusts and penny size hail. 

SOURCE...Radar indicated. 

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

This severe storm will be near...
  Burnsville and Savage around 725 PM CDT. 

Other locations impacted by this severe thunderstorm include
Marystown and Flying Cloud Airport.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4472 9363 4474 9363 4476 9362 4480 9357
      4481 9352 4484 9352 4487 9348 4478 9332
      4473 9333 4461 9350
TIME...MOT...LOC 0020Z 313DEG 47KT 4476 9349 

HAIL...0.75IN
WIND...60MPH
 
$$

BORGHOFF

717 
WWUS53 KMPX 050027
SVSMPX

Severe Weather Statement
National Weather Service Twin Cities/Chanhassen MN
727 PM CDT MON SEP 4 2017

MNC053-139-050037-
/O.CAN.KMPX.SV.W.0190.000000T0000Z-170905T0045Z/
Hennepin MN-Scott MN-
727 PM CDT MON SEP 4 2017

...THE SEVERE THUNDERSTORM WARNING FOR SOUTH CENTRAL HENNEPIN AND
NORTHEASTERN SCOTT COUNTIES IS CANCELLED...
        
The storm which prompted the warning has weakened below severe
limits, and has exited the warned area. Therefore, the warning has
been cancelled.  However small hail is still possible with this
thunderstorm.

LAT...LON 4472 9363 4474 9363 4476 9362 4480 9357
      4481 9352 4484 9352 4487 9348 4478 9332
      4473 9333 4461 9350
TIME...MOT...LOC 0026Z 315DEG 39KT 4470 9341 

$$

BORGHOFF

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 4, 2:51 PM CDT	Special Weather Statement	MPX	Morrison	24 min
Sep 4, 4:28 PM CDT	Special Weather Statement	MPX	Carver, Dakota, Hennepin, Ramsey, Washington	47 min
Sep 4, 5:04 PM CDT	Special Weather Statement	MPX	Goodhue, Le Sueur, Rice, Scott	41 min
Sep 4, 5:44 PM CDT	Severe Thunderstorm Warning	MPX	Freeborn, Rice, Steele, Waseca	46 min
Sep 4, 6:14 PM CDT	Special Weather Statement	MPX	Meeker, Wright	46 min
Sep 4, 6:20 PM CDT	Severe Thunderstorm Warning	MPX	Faribault, Freeborn	40 min
Sep 4, 6:48 PM CDT	Special Weather Statement	MPX	Carver, Hennepin, Ramsey	42 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.