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NOUS44 KLUB 160217

917 PM CDT Sat Apr 15 2017

...NWS Damage Survey for the April 14, 2017 Castro County Tornado

Rating: EF-3
Estimated Peak Wind: 140 MPH

Path length: 4.5 Miles
Path width: 1.1 Miles
Fatalities: 0
Injuries: 0

Start date: 04-14-2017
Start time: 630PM (Approx)
Start location: Dimmitt, TX 4.7SW
Start Lat/Lon: 34.512 -102.381

End date: 04-14-2017
End time: 650PM (Approx)
End location: Dimmitt, TX 3NW
End_lat/lon: 34.572 -102.359

Meteorologists with the National Weather Service in Lubbock
conducted a storm damage survey in Castro County on April 15.
This team surveyed damage across western and northern portions of
the county guided by radar data, local law enforcement, and
available streaming video during the event.

The storm associated with this event was a long duration supercell
which was tracked over about a 9 hour period and affected portions
of Parmer, Castro, Swisher, Hale, and Floyd counties.

The first indications of tornado development occurred around 605
PM about 12 miles southwest of Dimmitt. Numerous brief tornadoes
occurred as the storm moved toward the City of Dimmitt. The
absence of damage indicators across rural western Castro County
precluded determination of any path or intensity estimates.
Streaming video suggested that at least 5 brief tornadoes formed
across western Castro county with some exhibiting multi-vortex

The main tornado with this event exhibited a path of approximately
4.5 miles on a north-northeasterly track. The most significant
damage observed was located about three miles west of Dimmitt
where a metal systems building was completely destroyed. The
remnants were displaced several hundred feet northwest of the
original site. This corresponds with a maximum damage rating of
EF-3. Several nearby homes received up to EF-2 damage. Elsewhere
along the path, a lack of damage indicators made classification
difficult though numerous power poles and center pivots were
damaged. Streaming video of the event at its peak suggested a
large wedge type tornado with satellite vortices.

Additional damage occurred north of the city of Dimmitt in an area
under the parent mesocylone. The few damage indicators in this
area resulted in an inconclusive determination of tornado vs.
straight line winds. The city of Dimmitt received damage to power
poles consistent with straight line winds.

EF Scale:  The Enhanced Fujita Scale Classifies Tornadoes into
the following categories.

EF0...Weak......65 to 85 MPH
EF1...Weak......86 to 110 MPH
EF2...Strong....111 to 135 MPH
EF3...Strong....136 to 165 MPH
EF4...Violent...166 To 200 MPH
EF5...Violent...>200 MPH

The information in this statement is preliminary and subject to
change pending final review of the event and publication in NWS
Storm Data.

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