Alert archive / Minnesota / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 158, NWS Twin Cities, MN

July 17, 2017Morrison County, Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Jul 17, 2017, 6:01 PM CDT for Morrison County, Minnesota. It was in force for 59 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, 6:01 PM CDT (23:01 UTC)
Expired: Jul 17, 2017, 7:00 PM CDT
In force: 59 min
Issued by: NWS Twin Cities, MN
Area: Storm-based polygon
Tornado: Possible
Hail: 1.5 in
Wind: 70.0 mph

County Morrison County, MN

The radar

The Minneapolis radar (KMPX), 137 km from the middle of the area, began a volume at 23:02 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, 6:20 PM CDT	TSTM WND DMG	Little Falls, MN	LARGE TREE LIMBS DOWN.
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, 11.0 hours before the alert went out and 136 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.

459 
WUUS53 KMPX 172301
SVRMPX
MNC097-180000-
/O.NEW.KMPX.SV.W.0158.170717T2301Z-170718T0000Z/

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

The National Weather Service in The Twin Cities has issued a

* Severe Thunderstorm Warning for...
  Central Morrison County in central Minnesota...

* Until 700 PM CDT

* At 601 PM CDT, a severe thunderstorm was located over Randall, or 8
  miles northwest of Little Falls, moving east at 25 mph.

  HAZARD...70 mph wind gusts and ping pong ball size hail. 

  SOURCE...Radar indicated. 

  IMPACT...People and animals outdoors will be injured. Expect hail 
           damage to roofs, siding, windows, and vehicles. Expect 
           considerable tree damage. Wind damage is also likely to 
           mobile homes, roofs, and outbuildings. 

* This severe thunderstorm will be near,
  Camp Ripley around 610 PM CDT. 
  Little Falls around 615 PM CDT. 
  Pierz around 645 PM CDT. 
  Lastrup around 650 PM CDT. 

Other locations impacted by this severe thunderstorm include Camp
Ripley Junction, Buckman, Harding, Little Falls Airport and Genola.

This includes U.S. Highway 10 in Minnesota between mile markers 141
and 152.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4589 9445 4616 9437 4616 9397 4584 9396
TIME...MOT...LOC 2301Z 276DEG 22KT 4608 9445 

TORNADO...POSSIBLE
HAIL...1.50IN
WIND...70MPH
 
$$

BORGHOFF

1 follow-up statement

986 
WWUS53 KMPX 172312
SVSMPX

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

MNC097-180000-
/O.CON.KMPX.SV.W.0158.000000T0000Z-170718T0000Z/
Morrison MN-
612 PM CDT MON JUL 17 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 700 PM CDT
FOR CENTRAL MORRISON COUNTY...

At 611 PM CDT, a severe thunderstorm was located over Camp Ripley
Junction, or near Little Falls, moving east at 35 mph.

This is a very dangerous storm.

HAZARD...80 mph wind gusts and two inch hail. 

SOURCE...Radar indicated. 

IMPACT...Flying debris will be dangerous to those caught without 
         shelter. Mobile homes will be heavily damaged. Expect 
         considerable damage to roofs, windows, and vehicles. 
         Extensive tree damage and power outages are likely. 

This severe storm will be near...
  Pierz around 630 PM CDT. 
  Lastrup around 635 PM CDT. 

Other locations impacted by this severe thunderstorm include Camp
Ripley Junction, Buckman, Harding, Little Falls Airport and Genola.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

This is an EXTREMELY DANGEROUS SITUATION with tornado like wind
speeds expected. Mobile homes and high profile vehicles are
especially susceptible to winds of this magnitude and may be
overturned. For your protection move to an interior room on the
lowest floor of a building. This storm has the potential to cause
serious injury and significant property damage.

&&

LAT...LON 4589 9445 4616 9437 4616 9397 4584 9396
TIME...MOT...LOC 2311Z 281DEG 30KT 4606 9431 

TORNADO...POSSIBLE
HAIL...2.00IN
WIND...80MPH
 
$$

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, 6:19 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
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.