Public Information Statement
Issued by NWS Grand Forks, ND

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NOUS43 KFGF 141911 AAA
PNSFGF
NDZ027-029-030-150715-

Public Information Statement...UPDATED
National Weather Service Grand Forks ND
211 PM CDT Wed Jun 14 2017


...NWS DAMAGE SURVEY FOR JUNE 7 2017 TORNADO EVENT UPDATED...

.UPDATE...Added additional brief tornado tracks from the June 7 event.

.OVERVIEW...Thunderstorms developed early in the afternoon of June 7,
2017 and produced eight brief tornadoes across portions of Grand Forks,
Steele, and Traill counties. All tornadoes were rated EF-0 with winds
estimated between 70 to 80 mph.

.Tornado #1 (previously sent)...

Rating:                 EF-0
Estimated peak wind:    70 mph
Path length /Statute/:  0.2 miles
Path width /Maximum/:   25 yards
Fatalities:             0
Injuries:               0

Start date:             June 7 2017
Start time:             1249 PM CDT
Start location:         6 miles south-southwest of Inkster
Start Lat/Lon:          48.07/-97.69

End date:               June 7 2017
End time:               1252 PM CDT
End location:           6 miles south-southwest of Inkster
End Lat/Lon:            48.07/-97.69

This tornado was originally reported by GFK Air Traffic Control and
Grand Forks Air Force Base Officials. The tornado tracked to the east-
northeast over largely open fields for less than a half a mile.

.Tornado #2 (previously sent)...

Rating:                 EF-0
Estimated peak wind:    80 mph
Path length /Statute/:  2.7 miles
Path width /Maximum/:   75 yards
Fatalities:             0
Injuries:               0

Start date:             June 7 2017
Start time:             100 PM CDT
Start location:         2 miles west-southwest of Hatton
Start Lat/Lon:          47.63/-97.50

End date:               June 7 2017
End time:               108 PM CDT
End location:           1 mile northwest of Hatton
End Lat/Lon:            47.66/-97.47

This tornado was viewed by GFK ATC for nearly 10 minutes and was initially
estimated at 7 miles SW of GFK. Tornado had a dramatic dust swirl which was
captured on video and photos. Some ground scarring was evident, otherwise no
damage detected.

.Tornado #3...

Rating:                 EF-0
Estimated peak wind:    70 mph
Path length /Statute/:  0.2 miles
Path width /Maximum/:   50 yards
Fatalities:             0
Injuries:               0

Start date:             June 7 2017
Start time:             102 PM CDT
Start location:         2 miles south of Arvilla
Start Lat/Lon:          47.89/-97.50

End date:               June 7 2017
End time:               104 PM CDT
End location:           1 mile southeast of Arvilla
End_lat/lon:            47.91/-97.49


This tornado touched down around 2 miles south of Arvilla and tracked slowly
east-northeast across county road 2 for a quarter mile. No significant damage
was detected.

.TORNADO #4...

Rating:                 EF-0
Estimated peak wind:    75 mph
Path length /Statute/:  1.5 miles
Path width /Maximum/:   100 yards
Fatalities:             0
Injuries:               0

Start date:             June 7 2017
Start time:             113 PM CDT
Start location:         2 miles northwest of Mayville
Start Lat/Lon:          47.52/-97.35

End date:               June 7 2017
End time:               118 PM CDT
End location:           3 miles north of Mayville
End_lat/lon:            47.54/-97.32

This tornado touched down and tracked for around 1.5 miles to about
3 miles north of Mayville. This tornado was viewed by local residents and
photographed by observers on I-29, more than 11 miles east of touchdown.
Tornado crossed county road 14 with no significant damage detected.


.TORNADO #5...

Rating:                 EF-0
Estimated peak wind:    75 mph
Path length /Statute/:  0.5 miles
Path width /Maximum/:   100 yards
Fatalities:             0
Injuries:               0

Start date:             June 7 2017
Start time:             117 PM CDT
Start location:         3 west of Emerado
Start Lat/Lon:          47.93/-97.44

End date:               June 7 2017
End time:               119 PM CDT
End location:           2 west of Emerado
End_lat/lon:            47.93/-97.41

A damage survey noted an apparent brief touchdown with broken branches in a
shelter belt just south of highway 2 with debris flung eastward into the adjacent
field. The tornado tracked east-northeast for about one half mile with no
significant damage detected.

.TORNADO #6...

Rating:                 EF-0
Estimated peak wind:    75 mph
Path length /Statute/:  4 miles
Path width /Maximum/:   100 yards
Fatalities:             0
Injuries:               0

Start date:             June 7 2017
Start time:             118 PM CDT
Start location:         5 miles south-southeast of Hatton
Start Lat/Lon:          47.57/-97.41

End date:               June 7 2017
End time:               128 PM CDT
End location:           7 miles north of Mayville
End_lat/lon:            47.61/-97.34

This tornado tracked east-northeast for nearly 4 miles to around 7 miles north of
Mayville. The tornado produced a tall dust swirl but little to no apparent damage.

.TORNADO #7...

Rating:                 EF-0
Estimated peak wind:    70 mph
Path length /Statute/:  1 mile
Path width /Maximum/:   100 yards
Fatalities:             0
Injuries:               0

Start date:             June 7 2017
Start time:             118 PM CDT
Start location:         7 miles south of Emerado
Start Lat/Lon:          47.83/-97.36

End date:               June 7 2017
End time:               121 PM CDT
End location:           7 miles south-southeast of Emerado
End_lat/lon:            47.84/-97.33

A deputy reported a touchdown 2 miles south of the intersection of county roads 3 and 6.
The tornado appeared to track eastward for around a mile over a 2 to 3 minute span.
This tornado was also viewed by GFAFB observers and videoed from the south side of Grand
Forks looking west. No apparent or significant damage was observed.

.TORNADO #8...

Rating:                 EF-0
Estimated peak wind:    75 mph
Path length /Statute/:  2 mile
Path width /Maximum/:   75 yards
Fatalities:             0
Injuries:               0

Start date:             June 7 2017
Start time:             123 PM CDT
Start location:         3 miles southwest of Holmes
Start Lat/Lon:          47.68/-97.29

End date:               June 7 2017
End time:               130 PM CDT
End location:           1 mile south-southwest of Holmes
End_lat/lon:            47.70/-97.23

This tornado tracked northeastward for about 2 miles over a 6 to 7 minute time span.
No apparent or significant damage was observed.

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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