Alert archive / Minnesota / Tornado Warnings in 2017

Tornado Warning 28, NWS Twin Cities, MN

July 17, 2017Morrison County, Minnesota

NWS Twin Cities, MN issued this tornado warning at Jul 17, 2017, 6:19 PM CDT for Morrison County, Minnesota. It was in force for 41 min. 1 report 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, 6:19 PM CDT (23:19 UTC)
Expired: Jul 17, 2017, 7:00 PM CDT
In force: 41 min
Issued by: NWS Twin Cities, MN
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 2.0 in

County Morrison County, MN

The radar

The Minneapolis radar (KMPX), 129 km from the middle of the area, began a volume at 23:21 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, 6:30 PM CDT	TSTM WND DMG	Pierz, MN	NUMEROUS TREE LIMBS DOWN IN PIERZ.

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, 11.3 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.

183 
WFUS53 KMPX 172319
TORMPX
MNC097-180000-
/O.NEW.KMPX.TO.W.0028.170717T2319Z-170718T0000Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Twin Cities/Chanhassen MN
619 PM CDT MON JUL 17 2017

The National Weather Service in The Twin Cities has issued a

* Tornado Warning for...
  Southeastern Morrison County in central Minnesota...

* Until 700 PM CDT
    
* At 619 PM CDT, a severe thunderstorm capable of producing a tornado
  was located near Pierz, or 8 miles east of Little Falls, moving
  east at 40 mph.

  HAZARD...Tornado and hail up to two inches in diameter. 

  SOURCE...Radar indicated rotation. 

  IMPACT...Flying debris will be dangerous to those caught without 
           shelter. Mobile homes will be damaged or destroyed. 
           Damage to roofs, windows, and vehicles will occur.  Tree 
           damage is likely. 

* This dangerous storm will be near...
  Pierz around 625 PM CDT. 
  Lastrup around 630 PM CDT. 

Other locations impacted by this tornadic thunderstorm include
Buckman, Hillman, Little Falls Airport and Genola.

This includes U.S. Highway 10 in Minnesota between mile markers 145
and 146, and between mile markers 148 and 151.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4610 9381 4598 9381 4598 9377 4584 9376
      4582 9377 4590 9439 4610 9428
TIME...MOT...LOC 2319Z 278DEG 35KT 4601 9418 

TORNADO...RADAR INDICATED
HAIL...2.00IN

$$

BORGHOFF

2 follow-up statements

177 
WWUS53 KMPX 172336
SVSMPX

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

MNC097-180000-
/O.CON.KMPX.TO.W.0028.000000T0000Z-170718T0000Z/
Morrison MN-
636 PM CDT MON JUL 17 2017

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 700 PM CDT FOR
SOUTHEASTERN MORRISON COUNTY...
    
At 636 PM CDT, a severe thunderstorm capable of producing a tornado
was located near Hillman, or 20 miles east of Little Falls, moving
east at 45 mph.

HAZARD...Tornado and half dollar size hail. 

SOURCE...Radar indicated rotation. 

IMPACT...Flying debris will be dangerous to those caught without 
         shelter. Mobile homes will be damaged or destroyed. Damage 
         to roofs, windows, and vehicles will occur.  Tree damage is 
         likely. 

This tornadic thunderstorm will remain over mainly rural areas of
southeastern Morrison County, including the following locations:
Buckman and Hillman.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

This cluster of thunderstorms is capable of producing tornadoes and
widespread significant wind damage. Do not wait to see or hear the
tornado. For your protection move to an interior room on the lowest
floor of a building.

&&

LAT...LON 4608 9381 4598 9381 4598 9377 4584 9376
      4582 9377 4587 9419 4603 9393
TIME...MOT...LOC 2336Z 287DEG 38KT 4595 9393 

TORNADO...RADAR INDICATED
HAIL...1.25IN

$$

BORGHOFF

506 
WWUS53 KMPX 172350
SVSMPX

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

MNC097-180000-
/O.EXP.KMPX.TO.W.0028.000000T0000Z-170718T0000Z/
Morrison MN-
650 PM CDT MON JUL 17 2017

...THE TORNADO WARNING FOR SOUTHEASTERN MORRISON COUNTY WILL EXPIRE
AT 700 PM CDT...
        
The storm which prompted the warning has 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.

LAT...LON 4608 9381 4598 9381 4598 9377 4584 9376
      4582 9377 4587 9419 4603 9393
TIME...MOT...LOC 2350Z 278DEG 35KT 4593 9375 

$$

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, 6:27 PM CDT	Severe Thunderstorm Warning	MPX	Douglas, Todd	63 min
Jul 17, 6:40 PM CDT	Tornado Warning	MPX	Douglas, Stearns, Todd	35 min
Jul 17, 6:47 PM CDT	Severe Thunderstorm Warning	MPX	Benton, Kanabec, Mille Lacs, Morrison	58 min

Nearby

Tornado Warnings in Minnesota, 2017 Every tornado warning in 2017 Tornadoes 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.