Alert archive / Minnesota / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 160, NWS Twin Cities, MN

July 17, 20174 counties in Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Jul 17, 2017, 6:47 PM CDT for 4 counties in Minnesota. It was in force for 58 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: Jul 17, 2017, 6:47 PM CDT (23:47 UTC)
Expired: Jul 17, 2017, 7:45 PM CDT
In force: 58 min
Issued by: NWS Twin Cities, MN
Area: Storm-based polygon
Tornado: Possible
Hail: 1.0 in
Wind: 70.0 mph

Counties Benton County, MN, Kanabec County, MN, Mille Lacs County, MN, Morrison County, MN

The radar

The Minneapolis radar (KMPX), 128 km from the middle of the area, began a volume at 23:51 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 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, 11.8 hours before the alert went out and 128 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.

681 
WUUS53 KMPX 172347
SVRMPX
MNC009-065-095-097-180045-
/O.NEW.KMPX.SV.W.0160.170717T2347Z-170718T0045Z/

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

The National Weather Service in The Twin Cities has issued a

* Severe Thunderstorm Warning for...
  Kanabec County in east central Minnesota...
  Mille Lacs County in east central Minnesota...
  Northeastern Benton County in central Minnesota...
  Southeastern Morrison County in central Minnesota...

* Until 745 PM CDT

* At 646 PM CDT, severe thunderstorms were located along a line
  extending from near Onamia to Morrill, moving east at 45 mph.

  HAZARD...70 mph wind gusts and quarter size hail. 

  SOURCE...Radar indicated. 

  IMPACT...Hail damage to vehicles is expected. Expect considerable 
           tree damage. Wind damage is also likely to mobile homes, 
           roofs, and outbuildings. 

* Severe thunderstorms will be near,
  Onamia around 650 PM CDT. 
  Wahkon around 655 PM CDT. 
  Milaca and Foreston around 705 PM CDT. 
  Bock around 710 PM CDT. 
  Ogilvie and Quamba around 720 PM CDT. 
  Mora and Brunswick around 730 PM CDT. 
  Grasston around 735 PM CDT. 
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

Remain alert for a possible tornado! Tornadoes can develop quickly
from severe thunderstorms. If you spot a tornado go at once into the
basement or small central room in a sturdy structure.

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

&&

LAT...LON 4615 9343 4615 9306 4598 9306 4598 9314
      4573 9315 4573 9351 4572 9352 4577 9413
      4612 9378 4625 9350 4624 9343
TIME...MOT...LOC 2346Z 274DEG 39KT 4602 9370 4582 9394 

TORNADO...POSSIBLE
HAIL...1.00IN
WIND...70MPH
 
$$

BORGHOFF

3 follow-up statements

953 
WWUS53 KMPX 180007
SVSMPX

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

MNC009-065-095-097-180045-
/O.CON.KMPX.SV.W.0160.000000T0000Z-170718T0045Z/
Kanabec MN-Mille Lacs MN-Benton MN-Morrison MN-
707 PM CDT MON JUL 17 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 745 PM CDT
FOR KANABEC...CENTRAL MILLE LACS...NORTHEASTERN BENTON AND
SOUTHEASTERN MORRISON COUNTIES...

At 707 PM CDT, severe thunderstorms were located along a line
extending from near Warman to Milaca, moving east at 55 mph.

HAZARD...70 mph wind gusts and nickel size hail. 

SOURCE...Radar indicated. 

IMPACT...Expect considerable tree damage. Damage is likely to mobile 
         homes, roofs, and outbuildings. 

These severe storms will be near...
  Mora and Brunswick around 725 PM CDT. 
  Grasston around 735 PM CDT. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4615 9343 4615 9306 4598 9306 4598 9314
      4573 9315 4573 9351 4572 9352 4577 9413
      4587 9403 4599 9362
TIME...MOT...LOC 0007Z 269DEG 46KT 4607 9322 4578 9364 

HAIL...0.88IN
WIND...70MPH
 
$$

BORGHOFF

961 
WWUS53 KMPX 180018
SVSMPX

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

MNC009-065-095-097-180045-
/O.CON.KMPX.SV.W.0160.000000T0000Z-170718T0045Z/
Kanabec MN-Mille Lacs MN-Benton MN-Morrison MN-
718 PM CDT MON JUL 17 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 745 PM CDT
FOR KANABEC...CENTRAL MILLE LACS...NORTHEASTERN BENTON AND
SOUTHEASTERN MORRISON COUNTIES...

At 718 PM CDT, severe thunderstorms were located along a line
extending from near Hinckley to near Lewis Lake to Rum River, moving
east at 50 mph.

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

SOURCE...Radar indicated. 

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

These severe storms will be near...
  Brunswick around 725 PM CDT. 
  Grasston around 730 PM CDT. 
  Ogilvie around 740 PM CDT. 

Other locations impacted by these severe thunderstorms include Mora
Airport, Morrill, Warman, Knife Lake, Granite Ledge, Rum River and
Lewis Lake.

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 4615 9320 4615 9306 4598 9306 4598 9314
      4573 9315 4573 9351 4572 9352 4576 9402
      4589 9396 4593 9357
TIME...MOT...LOC 0018Z 277DEG 44KT 4605 9302 4580 9334 4579 9382 

HAIL...0.88IN
WIND...60MPH
 
$$

BORGHOFF

436 
WWUS53 KMPX 180039
SVSMPX

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

MNC009-065-095-097-180049-
/O.EXP.KMPX.SV.W.0160.000000T0000Z-170718T0045Z/
Kanabec MN-Mille Lacs MN-Benton MN-Morrison MN-
739 PM CDT MON JUL 17 2017

...THE SEVERE THUNDERSTORM WARNING FOR KANABEC...CENTRAL MILLE
LACS...NORTHEASTERN BENTON AND SOUTHEASTERN MORRISON COUNTIES WILL
EXPIRE AT 745 PM CDT...
    
The storms which prompted the warning have moved out of the area.
Therefore the warning will be allowed to expire.

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

To report severe weather, contact your nearest law enforcement
agency. They will relay your report to the National Weather Service
The Twin Cities.

LAT...LON 4615 9320 4615 9306 4598 9306 4598 9314
      4573 9315 4573 9351 4572 9352 4576 9402
      4589 9396 4593 9357
TIME...MOT...LOC 0039Z 274DEG 39KT 4603 9271 4578 9303 4578 9351 

$$

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, 6:27 PM CDT	Severe Thunderstorm Warning	MPX	Douglas, Todd	63 min
Jul 17, 6:40 PM CDT	Tornado Warning	MPX	Douglas, Stearns, Todd	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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.