Alert archive / Minnesota / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 159, NWS Twin Cities, MN

July 17, 2017Douglas County, Todd County, Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Jul 17, 2017, 6:27 PM CDT for Douglas County, Todd County, Minnesota. It was in force for 63 min. 2 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 17, 2017, 6:27 PM CDT (23:27 UTC)
Expired: Jul 17, 2017, 7:30 PM CDT
In force: 63 min
Issued by: NWS Twin Cities, MN
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Douglas County, MN, Todd County, MN

The radar

The Minneapolis radar (KMPX), 166 km from the middle of the area, began a volume at 23:31 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 17, 6:40 PM CDT	TSTM WND DMG	2 Se Garfield, MN	NUMEROUS TREE BRANCHES DOWN.
Jul 17, 7:00 PM CDT	TSTM WND DMG	Long Prairie, MN	TREE LIMBS DOWN BLOCKING STREETS IN TOWN.

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 17, 3:21 PM CDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 12:00Z, 11.5 hours before the alert went out and 164 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: 1041 m above ground
0-6 km bulk shear: 27 kt
0-1 km storm-relative helicity: 140 m²/s²
0-3 km storm-relative helicity: 214 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

779 
WUUS53 KMPX 172327
SVRMPX
MNC041-153-180030-
/O.NEW.KMPX.SV.W.0159.170717T2327Z-170718T0030Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Twin Cities/Chanhassen MN
627 PM CDT MON JUL 17 2017

The National Weather Service in The Twin Cities has issued a

* Severe Thunderstorm Warning for...
  Central Douglas County in west central Minnesota...
  Southern Todd County in central Minnesota...

* Until 730 PM CDT

* At 626 PM CDT, severe thunderstorms were located along a line
  extending from near Belle River to near Brandon, moving east at 30
  mph.

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

  SOURCE...Radar indicated. 

  IMPACT...Hail damage to vehicles is expected. Expect wind damage 
           to roofs, siding, and trees. 

* Severe thunderstorms will be near,
  Alexandria around 650 PM CDT. 
  Long Prairie and Carlos around 655 PM CDT. 
  Lake Osakis around 710 PM CDT. 
  Grey Eagle around 715 PM CDT. 
  Swanville around 720 PM CDT. 

Other locations impacted by these severe thunderstorms include
Alexandria Airport, Nelson, Garfield, Round Prairie, Burtrum,
Miltona, Rose City, Clotho, Long Prairie Airport and Leaf Valley.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Torrential rainfall is occurring with these storms, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 4608 9465 4590 9464 4580 9465 4584 9566
      4609 9556
TIME...MOT...LOC 2326Z 275DEG 24KT 4596 9517 4597 9554 

HAIL...1.00IN
WIND...60MPH
 
$$

BORGHOFF

2 follow-up statements

856 
WWUS53 KMPX 180015
SVSMPX

Severe Weather Statement
National Weather Service Twin Cities/Chanhassen MN
715 PM CDT MON JUL 17 2017

MNC041-180025-
/O.CAN.KMPX.SV.W.0159.000000T0000Z-170718T0030Z/
Douglas MN-
715 PM CDT MON JUL 17 2017

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

A severe thunderstorm watch remains in effect until 1100 PM CDT for
central Minnesota.

LAT...LON 4582 9505 4601 9501 4604 9465 4590 9464
      4580 9465
TIME...MOT...LOC 0015Z 272DEG 31KT 4590 9491 

$$

MNC153-180030-
/O.CON.KMPX.SV.W.0159.000000T0000Z-170718T0030Z/
Todd MN-
715 PM CDT MON JUL 17 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 730 PM CDT
FOR SOUTHEASTERN TODD COUNTY...

At 715 PM CDT, a severe thunderstorm was located over Round Prairie,
or 22 miles east of Alexandria, moving east at 35 mph.

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

SOURCE...Radar indicated. 

IMPACT...Hail damage to vehicles is expected. Expect wind damage to 
         roofs, siding, and trees. 

This severe storm will be near...
  Swanville and Grey Eagle around 730 PM CDT. 

Other locations impacted by this severe thunderstorm include Burtrum,
Long Prairie Airport, Round Prairie and Little Sauk.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 4582 9505 4601 9501 4604 9465 4590 9464
      4580 9465
TIME...MOT...LOC 0015Z 272DEG 31KT 4590 9491 

HAIL...1.00IN
WIND...60MPH
 
$$

BORGHOFF

198 
WWUS53 KMPX 180032
SVSMPX

Severe Weather Statement
National Weather Service Twin Cities/Chanhassen MN
732 PM CDT MON JUL 17 2017

MNC153-180042-
/O.EXP.KMPX.SV.W.0159.000000T0000Z-170718T0030Z/
Todd MN-
732 PM CDT MON JUL 17 2017

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN TODD COUNTY HAS
EXPIRED...
                
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore the warning has been allowed to expire.

A severe thunderstorm watch remains in effect until 1100 PM CDT for
central Minnesota.

LAT...LON 4582 9505 4601 9501 4604 9465 4590 9464
      4580 9465
TIME...MOT...LOC 0032Z 275DEG 24KT 4589 9476 

$$

BORGHOFF

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 17, 3:27 AM CDT	Heat Advisory	MPX	Anoka, Benton, Brown, Carver, Chippewa, Dakota and 24 more	16 hr
Jul 17, 4:50 PM CDT	Severe Thunderstorm Warning	MPX	Todd	40 min
Jul 17, 5:24 PM CDT	Severe Thunderstorm Warning	MPX	Douglas	66 min
Jul 17, 5:29 PM CDT	Severe Thunderstorm Warning	MPX	Morrison, Todd	61 min
Jul 17, 5:37 PM CDT	Tornado Warning	MPX	Morrison, Todd	38 min
Jul 17, 5:45 PM CDT	Tornado Warning	MPX	Douglas	45 min
Jul 17, 6:01 PM CDT	Severe Thunderstorm Warning	MPX	Morrison	59 min
Jul 17, 6:19 PM CDT	Tornado Warning	MPX	Morrison	41 min
Jul 17, 6:40 PM CDT	Tornado Warning	MPX	Douglas, Stearns, Todd	35 min
Jul 17, 6:47 PM CDT	Severe Thunderstorm Warning	MPX	Benton, Kanabec, Mille Lacs, Morrison	58 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.