Alert archive / Minnesota / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 157, NWS Twin Cities, MN

July 17, 2017Morrison County, Todd County, Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Jul 17, 2017, 5:29 PM CDT for Morrison County, Todd County, Minnesota. It was in force for 61 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, 5:29 PM CDT (22:29 UTC)
Expired: Jul 17, 2017, 6:30 PM CDT
In force: 61 min
Issued by: NWS Twin Cities, MN
Area: Storm-based polygon
Hail: 1.75 in
Wind: 60.0 mph

Counties Morrison County, MN, Todd County, MN

The radar

The Minneapolis radar (KMPX), 177 km from the middle of the area, began a volume at 22:29 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, 5:40 PM CDT	TSTM WND DMG	3 Ene Browerville, MN	TREES DOWN ON POWERLINES BOTH EAST & NORTHEAST OF BROWERVILLE. TIME ESTIMATED FROM RADAR.
Jul 17, 5:55 PM CDT	HAIL 1	Randall, MN	BETWEEN 545 PM AND 645 PM SPOTTER MEASURED 1.50 INCHES OF RAIN.

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, 10.5 hours before the alert went out and 176 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.

755 
WUUS53 KMPX 172229
SVRMPX
MNC097-153-172330-
/O.NEW.KMPX.SV.W.0157.170717T2229Z-170717T2330Z/

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

The National Weather Service in The Twin Cities has issued a

* Severe Thunderstorm Warning for...
  Northern Todd County in central Minnesota...
  Northwestern Morrison County in central Minnesota...

* Until 630 PM CDT

* At 529 PM CDT, a severe thunderstorm was located over Clarissa, or
  26 miles northeast of Alexandria, moving east at 20 mph.

  HAZARD...Golf ball size hail and 60 mph wind gusts. 

  SOURCE...Radar indicated. 

  IMPACT...People and animals outdoors will be injured. Expect hail 
           damage to roofs, siding, windows, and vehicles. Expect 
           wind damage to roofs, siding, and trees. 

* This severe thunderstorm will be near,
  Browerville around 540 PM CDT. 
  Randall and Fort Ripley around 630 PM CDT. 

Other locations impacted by this severe thunderstorm include
Philbrook, Cushing, Clotho and Crow Wing State Park.

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 4635 9470 4636 9467 4633 9462 4631 9455
      4633 9443 4627 9433 4623 9440 4617 9436
      4594 9443 4603 9514 4631 9516 4636 9473
TIME...MOT...LOC 2229Z 262DEG 18KT 4614 9494 

HAIL...1.75IN
WIND...60MPH
 
$$

BORGHOFF

1 follow-up statement

117 
WWUS53 KMPX 172307
SVSMPX

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

MNC153-172317-
/O.CAN.KMPX.SV.W.0157.000000T0000Z-170717T2330Z/
Todd MN-
607 PM CDT MON JUL 17 2017

...THE SEVERE THUNDERSTORM WARNING FOR NORTHERN TODD 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 4597 9465 4622 9464 4619 9437 4617 9436
      4594 9443
TIME...MOT...LOC 2307Z 280DEG 32KT 4607 9438 

$$

MNC097-172330-
/O.CON.KMPX.SV.W.0157.000000T0000Z-170717T2330Z/
Morrison MN-
607 PM CDT MON JUL 17 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 630 PM CDT
FOR WEST CENTRAL MORRISON COUNTY...

At 607 PM CDT, a severe thunderstorm was located over Camp Ripley, or
near Little Falls, moving east at 35 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 remain over mainly rural areas of west
central Morrison County, including the following locations: Cushing.

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 this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 4597 9465 4622 9464 4619 9437 4617 9436
      4594 9443
TIME...MOT...LOC 2307Z 280DEG 32KT 4607 9438 

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

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, 5:37 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
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.