Public Information Statement
Issued by NWS North Platte, NE

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NOUS43 KLBF 222016
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NEZ004>010-022>029-035>038-056>059-069>071-094-240830-

Public Information Statement
National Weather Service North Platte NE
316 PM CDT Tue Aug 22 2017 /216 PM MDT Tue Aug 22 2017/

...NWS DAMAGE SURVEY FOR 08/19/2017 TORNADO EVENT...

.OVERVIEW...The atmosphere was primed for thunderstorms
on Saturday, August 19th but there was only one large storm
that took advantage of it. This storm produced 4 distinct
tornado tracks and there were two significant areas of
straight line wind damage. One area in Almeria was likely
due to strong inflow into the storm, and the other, northwest
of Sargent was likely due to a very strong rear flank
downdraft. There is also evidence in the radar data and in
the survey of two tornadoes on the ground at once, one was
likely anticyclonic.

.TORNADO #1...

Rating:                 EF-0
Estimated peak wind:    65 mph
Path length /Statute/:  0.1 miles
Path width /Maximum/:   10 yards
Fatalities:             0
Injuries:               0

Start date:             08/19/2017
Start time:             7:40 pm CDT
Start location:         10 miles Northwest of Almeria

End date:               08/19/2017
End time:               7:41 pm CDT
End Location:           10 miles Northwest of Almeria

SURVEY_SUMMARY: There was likely a brief touchdown near the
Blaine County line, supported by a debris signature on radar.
This path will be updated after surveyed by the EM.

.TORNADO #2...

Rating:                 EF-1
Estimated peak wind:    105 mph
Path length /Statute/:  2.3 miles
Path width /Maximum/:   840 yards
Fatalities:             0
Injuries:               0

Start date:             08/19/2017
Start time:             7:48 pm CDT
Start location:         5.5 miles Northwest of Almeria

End date:               08/19/2017
End time:               7:50 pm CDT
End Location:           3.8 miles Northwest of Almeria

SURVEY_SUMMARY: This path began with the partial loss of a roof on
a well-built Ward Craft home. The trusses were anchored with hurricane
clips. The owner stated that the wind was at least over 60 mph for
40 minutes so some of this damage may have been from straight line wind
preceding the tornado. The tree line just east of the home was not
significantly damaged but the damage path carried far to the south with
debris from the roof, a lot of tree damage, and some snapped wooden
power poles.

.TORNADO #3...

Rating:                 EF-1
Estimated peak wind:    100 mph
Path length /Statute/:  0.6 miles
Path width /Maximum/:   330 yards
Fatalities:             0
Injuries:               0

Start date:             08/19/2017
Start time:             7:48 pm CDT
Start location:         5.3 miles Northwest of Almeria

End date:               08/19/2017
End time:               7:50 pm CDT
End Location:           3.3 miles Northwest of Almeria

SURVEY_SUMMARY: This damage path included snapped wooden power poles,
and widespread tree damage with entire trees leaning over but not
fully uprooted and large branches broken. There was also a large
corrugated metal Quonset hut that was twisted about 90 degrees and
collapsed inward.

.TORNADO #4...

Rating:                 EF-2
Estimated peak wind:    120 mph
Path length /Statute/:  0.65 miles
Path width /Maximum/:   540 yards
Fatalities:             0
Injuries:               0

Start date:             08/19/2017
Start time:             8:14 pm CDT
Start location:         2.82 miles West of Almeria

End date:               08/19/2017
End time:               8:17 pm CDT
End Location:           3.52 miles West-Southwest of Almeria

SURVEY_SUMMARY: The damage here was to a 100 year old shelter belt
and recently vacated homestead with several outbuildings. All outbuildings
were completely destroyed but were in various stages of decay. Some had
cement foundations and the walls were straight nailed to a bottom plate
that was bolted into the foundation. Other sheds were wooden and covered
in corrugated sheet metal. This sheet metal and missiles from the wooden
parts of the shed were found almost one half mile away in the shelter
belt. The property also had a boat on a trailer. The boat was missing for
the most part but parts of a boat were seen by the Emergency Manager in
a nearby field less than one mile away. Many of the trees were debarked
and twisted in the shelter belt with only the larger branches remaining.
Most of the trees were soft wood, most were healthy. The home had some
damage to the roof and there was evidence of a missile from one of the
sheds penetrating the attic. Some faux wood paneling in the home was
sucked off of the wall near the access to the attic.

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

.THUNDERSTORM WIND IN ALMERIA...

Peak wind Estimated:    88 mph
Path length /Statute/:  0.25 miles
Path width /Maximum/:   300 yards
Fatalities:             0
Injuries:               0

Start date:             08/19/2017
Start time:             8:15 pm CDT
Start location:         Almeria, NE

End date:               08/19/2017
End time:               8:20 pm CDT
End location:           0.25 miles East of Almeria

SURVEY_SUMMARY: Strong inflow winds into the storm, estimated
near 90 mph by radar and evidenced in the damage, likely caused
a pivot to flip and caused some significant tree damage in and
near the town of Almeria.

.THUNDERSTORM WIND NEAR SARGENT...

Peak wind Estimated:    85 mph
Path length /Statute/:  0.1 miles
Path width /Maximum/:   10 yards
Fatalities:             0
Injuries:               0

Start date:             08/19/2017
Start time:             9:07 pm CDT
Start location:         Northwest of Sargent

End date:               08/19/2017
End time:               9:15 pm CDT
End location:           Northwest of Sargent

SURVEY_SUMMARY: A fifth wheel was blown over into a truck and a structure
by strong winds in the rear flank downdraft portion of the storm as it
came out of Loup County. Winds were between 80 and 90 mph based on radar
estimates and the nature of the damage. This portion will likely be updated
as we receive more information on the location and extent of the damage.

NOTE:
The information in this statement is PRELIMINARY and subject to
change pending final review of the events and publication in
NWS Storm Data.

$$


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