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Public Information Statement

Statement as of 4:45 PM CDT on August 28, 2016


... NWS damage survey for 08/27/16 tornado events...

.Overview... A National Weather Service storm damage assessment
team has reviewed damage from two tornadoes which occurred across
portions of southeast Grand Forks County and one tornado which
occurred across eastern Traill County... resulting from storms in the
afternoon and early evening of August 27th.

There were no injuries and no fatalities from these tornadoes.

Based on video and photographic evidence... plus multiple eyewitness
accounts... it is clear that two separate and distinct tornadoes
occurred from the same parent supercell thunderstorm in southeast
Grand Forks County. The first was a brief touchdown in far southeast
Arvilla township and the second was a much larger and longer
tracking tornado across northern Pleasant View township.

A third tornado occurred nearly an hour and a half later in east
central Traill County. This tornado crossed the Interstate 29
corridor and produced severe damage at two farmsteads and at the
Taft elevator complex.

.Tornado #1...

Rating: EF-0
estimated peak wind: 70 mph
path length /statute/: 0.5 miles
path width /maximum/: 100 yards
fatalities: 0
injuries: 0

Start date: Aug 27 2016
start time: 412 PM CDT
start location: 3.5 miles SSW Arvilla
start lat/lon: 47.8600 / -97.50

End date: Aug 27 2016
end time: 414 PM CDT
end location: 4.5 miles S Arvilla
end_lat/lon: 47.8550 / -97.4900

This tornado touched down for 1 to 2 minutes and tracked for
less than one half mile over a largely opened field west of
cr2.

.Tornado #2...

Rating: EF-1
estimated peak wind: 110 mph
path length /statute/: 4.0 miles
path width /maximum/: 600 yards
fatalities: 0
injuries: 0

Start date: Aug 27 2016
start time: 418 PM CDT
start location: 5.5 miles S Arvilla
start lat/lon: 47.8500 / -97.4800

End date: Aug 27 2016
end time: 432 PM CDT
end location: 8.0 miles SSW Emerado
end_lat/lon: 47.8100 / -97.4100

this large tornado snapped or uprooted numerous trees along its
path. It demolished a small barn and spread barn materials... ranch
debris... and small trailers over a broad area.

.Tornado #3...

Rating: EF-3
estimated peak wind: 140 mph
path length /statute/: 3.0 miles
path width /maximum/: 300 yards
fatalities: 0
injuries: 0

Start date: Aug 27 2016
start time: 602 PM CDT
start location: 2.5 SSW Cummings
start lat/lon: 47.4860 / -97.1000

End date: Aug 27 2016
end time: 610 PM CDT
end location: 2.5 miles NNE Hillsboro
end_lat/lon: 47.4500 / -97.0500

This severe tornado destroyed a two car garage and snapped or
uprooted numerous trees numerous at a Farmstead west of
Interstate 29. It then crossed the I-29 corridor and tore down
filled grain bins and toppled elevator legs at the Taft elevator
complex. Further east... it demolished half of an engineered metal
building and then tore the roof of a well constructed home and
caved in sections of the main floor exterior walls. The tornado
appears to have ended within a half mile to the east of this
Farmstead.

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

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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