Alert archive / Minnesota / Tornado Warnings in 2017

Tornado Warning 26, NWS Twin Cities, MN

July 17, 2017Morrison County, Todd County, Minnesota

NWS Twin Cities, MN issued this tornado warning at Jul 17, 2017, 5:37 PM CDT for Morrison County, Todd County, Minnesota. It was in force for 38 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, 5:37 PM CDT (22:37 UTC)
Expired: Jul 17, 2017, 6:15 PM CDT
In force: 38 min
Issued by: NWS Twin Cities, MN
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 2.0 in

Counties Morrison County, MN, Todd County, MN

The radar

The Minneapolis radar (KMPX), 164 km from the middle of the area, began a volume at 22:37 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, 10.6 hours before the alert went out and 162 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.

935 
WFUS53 KMPX 172237
TORMPX
MNC097-153-172315-
/O.NEW.KMPX.TO.W.0026.170717T2237Z-170717T2315Z/

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

The National Weather Service in The Twin Cities has issued a

* Tornado Warning for...
  East central Todd County in central Minnesota...
  West central Morrison County in central Minnesota...

* Until 615 PM CDT
    
* At 536 PM CDT, a severe thunderstorm capable of producing a tornado
  was located over Browerville, or 25 miles west of Little Falls,
  moving east at 50 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...
  Randall around 600 PM CDT. 

Other locations impacted by this tornadic thunderstorm include
Sobieski.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.

&&

LAT...LON 4602 9502 4619 9496 4616 9437 4591 9443
TIME...MOT...LOC 2236Z 280DEG 42KT 4610 9487 

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

$$

BORGHOFF

2 follow-up statements

475 
WWUS53 KMPX 172252
SVSMPX

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

MNC097-153-172315-
/O.CON.KMPX.TO.W.0026.000000T0000Z-170717T2315Z/
Todd MN-Morrison MN-
552 PM CDT MON JUL 17 2017

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 615 PM CDT FOR EAST
CENTRAL TODD AND WEST CENTRAL MORRISON COUNTIES...
    
At 552 PM CDT, a severe thunderstorm capable of producing a tornado
was located over Randall, or 12 miles northwest of Little Falls,
moving east at 25 mph.

HAZARD...Tornado and ping pong ball 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 dangerous storm will be near...
  Randall around 600 PM CDT. 

Other locations impacted by this tornadic thunderstorm include
Sobieski.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.

&&

LAT...LON 4599 9488 4616 9463 4616 9437 4591 9443
TIME...MOT...LOC 2252Z 253DEG 23KT 4609 9455 

TORNADO...RADAR INDICATED
HAIL...1.50IN

$$

BORGHOFF

885 
WWUS53 KMPX 172308
SVSMPX

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

MNC097-153-172318-
/O.EXP.KMPX.TO.W.0026.000000T0000Z-170717T2315Z/
Todd MN-Morrison MN-
608 PM CDT MON JUL 17 2017

...THE TORNADO WARNING FOR EAST CENTRAL TODD AND WEST CENTRAL
MORRISON COUNTIES WILL EXPIRE AT 615 PM CDT...
    
The tornado threat has diminished and the Tornado Warning has been
cancelled. However, large hail and damaging winds remain likely and a
Severe Thunderstorm Warning remains in effect for the area.

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

Remember, a Severe Thunderstorm Warning still remains in effect for
Morrison county until 7 pm.

LAT...LON 4599 9488 4616 9463 4616 9437 4591 9443
TIME...MOT...LOC 2308Z 280DEG 42KT 4606 9430 

$$

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, 5:45 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

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.