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North Dakota, Grand Forks

Local Storm Report



07/21/2014 0829 PM

2 miles E of Kempton, Grand Forks County.

Tornado, reported by NWS storm survey.


            A tornado tracked intermittently for about 8 miles to
            about 2 SSE of Arvilla by 841 PM CDT. This tornado
            snarled trees in shelter belts and broke down numerous
            large tree branches... limbs and whole tree trunks along
            its path. A few rural residences and farm buildings had
            shingles torn off... quonset doors were torn off... and at
            least one small farm outbuilding was collapsed. Peak
            winds estimated to 90 mph. Maximum width to 300 yards.





07/21/2014 0753 PM

3 miles NW of Larimore, Grand Forks County.

Hail e1.00 inch, reported by law enforcement.





07/21/2014 0758 PM

7 miles WNW of Grand Forks, Grand Forks County.

Thunderstorm wind gust m69.00 mph, reported by ASOS.


            Peak wind at the Grand Forks International Airport.
            Window damage reported at the terminal building.




07/21/2014 0805 PM

5 miles NNW of Grand Forks, Grand Forks County.

Thunderstorm wind gust m61.00 mph, reported by mesonet.


            Peak winds measured at the Grand Forks nddot wind sensor
            along I-29.




07/21/2014 0815 PM

Grand Forks, Grand Forks County.

Thunderstorm wind damage, reported by trained spotter.


            8 to 10 inch trees downed in south Grand Forks 32nd Ave
            and legend Lane. Time approximate.




07/21/2014 0815 PM

Grand Forks, Grand Forks County.

Thunderstorm wind damage, reported by NWS employee.


            Fist sized... approx 3inch diameter... tree branch down in
            backyard.




07/21/2014 0713 PM

Larimore, Grand Forks County.

Hail e1.00 inch, reported by trained spotter.


            Hail ranging from 3/4 to 1 inch




07/21/2014 0817 PM

7 miles WNW of Grand Forks, Grand Forks County.

Thunderstorm wind gust m58.00 mph, reported by ASOS.


            Peak wind measured at the Grand Forks International
            Airport.




07/21/2014 0835 PM

Grand Forks, Grand Forks County.

Thunderstorm wind damage, reported by public.


            Tree down in residents backyard on University av.




07/21/2014 0835 PM

Grand Forks, Grand Forks County.

Thunderstorm wind damage, reported by public.


            3 to 4 inch tree branches down vicinity of ground round
            on 32 av S. Numerous smaller branches on ground vicinity
            of Post office on 28 av S.




07/21/2014 0853 PM

6 miles W of Larimore, Grand Forks County.

Funnel cloud, reported by 911 call center.





07/21/2014 0721 PM

4 miles E of Larimore, Grand Forks County.

Hail e1.75 inch, reported by trained spotter.





07/21/2014 0910 PM

Grand Forks, Grand Forks County.

Flash flood, reported by amateur radio.


            Water flowing over both west bound lanes on Washington
            street near Junction with 32 av S.




07/21/2014 0915 PM

Grand Forks, Grand Forks County.

Flash flood, reported by trained spotter.


            Several inches of water pooling over streets east of
            Washington St.




07/21/2014 1036 PM

7 miles WNW of Grand Forks, Grand Forks County.

Non-thunderstorm wind gust m63.00 mph, reported by ASOS.


            Measured at Airport




07/21/2014 0746 PM

4 miles E of Larimore, Grand Forks County.

Hail e0.88 inch, reported by Park/Forest srvc.





07/21/2014 0751 PM

7 miles WNW of Grand Forks, Grand Forks County.

Thunderstorm wind gust m66.00 mph, reported by ASOS.


            Peak winds measured at the Grand Forks International
            Airport /kgfk/.




07/21/2014 0805 PM

5 miles NNW of Grand Forks, Grand Forks County.

Thunderstorm wind gust m61.00 mph, reported by mesonet.


            Peak winds measured at the Grand Forks nddot wind sensor
            along I-29.




07/21/2014 0815 PM

Grand Forks, Grand Forks County.

Thunderstorm wind damage, reported by NWS employee.


            Fist sized... approx 3inch diameter... tree branch down in
            backyard.




07/21/2014 0815 PM

Grand Forks, Grand Forks County.

Thunderstorm wind damage, reported by trained spotter.


            8 to 10 inch trees downed in south Grand Forks 32nd Ave
            and legend Lane. Time approximate.




07/21/2014 0817 PM

6 miles W of Grand Forks, Grand Forks County.

Thunderstorm wind gust m58.00 mph, reported by ASOS.


            Peak wind measured at the Grand Forks International
            Airport.




07/21/2014 0835 PM

Grand Forks, Grand Forks County.

Thunderstorm wind damage, reported by public.


            3 to 4 inch tree branches down vicinity of ground round
            on 32 av S. Numerous smaller branches on ground vicinity
            of Post office on 28 av S.




07/21/2014 0835 PM

Grand Forks, Grand Forks County.

Thunderstorm wind damage, reported by public.


            Tree down in residents backyard on University av.




07/21/2014 0713 PM

Larimore, Grand Forks County.

Hail e1.00 inch, reported by trained spotter.


            Hail ranging from 3/4 to 1 inch




07/21/2014 0853 PM

6 miles W of Larimore, Grand Forks County.

Funnel cloud, reported by 911 call center.





07/21/2014 0910 PM

Grand Forks, Grand Forks County.

Flash flood, reported by amateur radio.


            Water flowing over both west bound lanes on Washington
            street near Junction with 32 av S.




07/21/2014 0915 PM

Grand Forks, Grand Forks County.

Flash flood, reported by trained spotter.


            Several inches of water pooling over streets east of
            Washington St.




07/21/2014 0721 PM

4 miles E of Larimore, Grand Forks County.

Hail e1.75 inch, reported by trained spotter.





07/21/2014 1036 PM

5 miles W of Grand Forks, Grand Forks County.

Non-thunderstorm wind gust m63.00 mph, reported by ASOS.


            Measured at Airport




07/21/2014 0746 PM

4 miles E of Larimore, Grand Forks County.

Hail e0.88 inch, reported by Park/Forest srvc.





07/21/2014 0751 PM

6 miles W of Grand Forks, Grand Forks County.

Thunderstorm wind gust m66.00 mph, reported by ASOS.


            Peak winds measured at the Grand Forks International
            Airport /kgfk/.




07/21/2014 0753 PM

4 miles WNW of Larimore, Grand Forks County.

Hail e1.00 inch, reported by law enforcement.





07/21/2014 0758 PM

6 miles W of Grand Forks, Grand Forks County.

Thunderstorm wind gust m69.00 mph, reported by ASOS.


            Peak wind at the Grand Forks International Airport.
            Window damage reported at the terminal building.




07/21/2014 1036 PM

5 miles W of Grand Forks, Grand Forks County.

Non-thunderstorm wind gust m63.00 mph, reported by ASOS.


            Measured at Airport




07/21/2014 0915 PM

Grand Forks, Grand Forks County.

Flash flood, reported by trained spotter.


            Several inches of water pooling over streets east of
            Washington St.





07/21/2014 0910 PM

Grand Forks, Grand Forks County.

Flash flood, reported by amateur radio.


            Water flowing over both west bound lanes on Washington
            street near Junction with 32 av S.





07/21/2014 0835 PM

Grand Forks, Grand Forks County.

Thunderstorm wind damage, reported by public.


            3 to 4 inch tree branches down vicinity of ground round
            on 32 av S. Numerous smaller branches on ground vicinity
            of Post office on 28 av S.





07/21/2014 0853 PM

6 miles W of Larimore, Grand Forks County.

Funnel cloud, reported by 911 call center.






07/21/2014 0835 PM

Grand Forks, Grand Forks County.

Thunderstorm wind damage, reported by public.


            Tree down in residents backyard on University av.





07/21/2014 0805 PM

5 miles NNW of Grand Forks, Grand Forks County.

Thunderstorm wind gust m61 mph, reported by mesonet.


            Peak winds measured at the Grand Forks nddot wind sensor
            along I-29.





07/21/2014 0815 PM

Grand Forks, Grand Forks County.

Thunderstorm wind damage, reported by trained spotter.


            8 to 10 inch trees downed in south Grand Forks 32nd Ave
            and legend Lane. Time approximate.





07/21/2014 0815 PM

Grand Forks, Grand Forks County.

Thunderstorm wind damage, reported by trained spotter.


            8 to 10 inch trees downed in south Grand Forks 32nd Ave
            and legend Lane. Time approximate.





07/21/2014 0817 PM

6 miles W of Grand Forks, Grand Forks County.

Thunderstorm wind gust m58 mph, reported by ASOS.


            Peak wind measured at the Grand Forks International
            Airport.





07/21/2014 0815 PM

Grand Forks, Grand Forks County.

Thunderstorm wind damage, reported by NWS employee.


            Fist sized... approx 3inch diameter... tree branch down in
            backyard.





07/21/2014 0758 PM

6 miles W of Grand Forks, Grand Forks County.

Thunderstorm wind gust m69 mph, reported by ASOS.


            Peak wind at the Grand Forks International Airport.
            Window damage reported at the terminal building.





07/21/2014 0758 PM

6 miles W of Grand Forks, Grand Forks County.

Thunderstorm wind gust m69 mph, reported by ASOS.


            Peak wind at the Grand Forks International Airport.
            Window damage reported at the terminal building.





07/21/2014 0753 PM

4 miles W of Larimore, Grand Forks County.

Hail e1.00 inch, reported by law enforcement.






07/21/2014 0751 PM

6 miles W of Grand Forks, Grand Forks County.

Thunderstorm wind gust m66 mph, reported by ASOS.


            Peak winds measured at the Grand Forks International
            Airport /kgfk/.





07/21/2014 0746 PM

4 miles E of Larimore, Grand Forks County.

Hail e0.88 inch, reported by Park/Forest srvc.






07/21/2014 0721 PM

4 miles E of Larimore, Grand Forks County.

Hail e1.75 inch, reported by trained spotter.






07/21/2014 0713 PM

Larimore, Grand Forks County.

Hail e1.00 inch, reported by trained spotter.


            Hail ranging from 3/4 to 1 inch



Public Information Statement

Statement as of 8:10 PM CDT on July 23, 2014


... NWS damage survey for 07/21/14 tornado event in Polk and
Red Lake County MN...

A large scale Bow-echo type squall line moved across northeast
North Dakota and northwest Minnesota during the evening of 21
July 2014. A tornado formed on the apex of this squall line and
moved from southwest Polk County Minnesota into southwest Red
Lake County. The tornado itself was likely wrapped in heavy
rain and more widespread damaging downburst winds. The tornado
track itself was distinguishable by the presence of more
extreme damage and an apparent lofting and throwing of debris.
In addition... several rural residents noted the apparent roar
of the storm along with its brief and catastrophic impacts.

.Tornado 1...

Rating: EF-2
estimated peak wind: 120 mph
path length /statute/: 27 miles
path width /maximum/: 800 yards
fatalities: 0
injuries: 0

Start date: July 21 2014
start time: around 850 PM CDT
start location: approx. 4 miles WNW of Eldred
start lat/lon: 47.7000n/-96.8600w (est.)

End date: July 21 2014
end time: by 945 PM CDT
end location: approx. 9 miles ESE Red Lake Falls
end_lat/lon: 47.5100n/-96.0500w (est.)

This narrative is amended for additional track information collected
on July 22

The team examined an area starting in Roome township... near
Eldred... and continuing east northeast through Crookston and
Gentilly... into Northern Lake pleasant township in southwest
Red Lake County. The team returned on July 22 to follow up on
additional information that was received late on July 21st. The
additional investigation covered the Terrebonne... Gervais...
Poplar River and Emardville townships. The tornado track is
extended 10 miles making the total tornado track length
approximately 37 miles.

In general... damage included numerous snapped or uprooted trees
as well as significant roof damage to residential and farm
structures along the path.

At the Point of initial touchdown the tornado caused significant
damage to a large... modern equipment shed removing sections of
the roof and imploding one of the main doors. Several miles
east-northeast a 1.5 mile string of dual pole/cross-beam high
tension power lines were toppled... consistent with low end EF2
tornadic winds. Damage to nearby farmsteads include numerous
uprooted and partially denuded trees.

Just south of Crookston a line of 17 /empty/ tanker style rail
cars were rolled on their side while a couple very large steel
grain bins were blown out leaving piles of grain on the ground.

Damage was widespread across the Crookston area... with the most
extreme damages apparent across the southern portions of the city.
To the east of Crookston significant damage to several shelter
belts was noted along and just north of Polk County 11 and west
of the Red Lake river. Several farm storage buildings experienced
significant roof damage along the same path.

Damage was observed across the community of Gentilly with damage
to several large shelter belts up to one half mile northwest of
Gentilly. This damage path continued into the western portions
of the Lake Pleasant township of Red Lake County.

Three farmsteads approximately 4 miles south-southwest of Red Lake
Falls were hit by the tornado. Damage included total loss of
out-buildings... a large Boxelder tree lofted into the side of a
house and numerous hardwoods trees that were partially denuded. An
eyewitness observed the start of the tornado about 1 mile west of
his Farmstead before seeking shelter.

The tornado track continue on to the east-northeast leaving a
narrow yet discernible track through shelterbelts. At one point
approximately 3 miles northwest of Terrebonne MN damage... consistent
with low end EF2 tornadic winds... was observed. At one Farmstead a
well built fully secured garage was destroyed... while at a nearby
Farmstead 5 empty grain bins were lofted off their foundation. The
farthest was over 1/2 mile while a 5th bin has yet to be found.

Near the end of the sporadic tornado track several power poles were
bent at angles greater than 45 degrees. One was broken off near the
base. From this point for approximately 2 more miles isolated tree
damage... consistent with EF0 wind speeds was noted. The damage path
ended about halfway between Plummer MN and Brooks MN... one mile west
of US Highway 59.

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 event and publication in
NWS storm data.


Weather Severe Map
Arizona - Blowing Dust Advisory, Excessive Heat Warning , Excessive Heat Warning , Special Statement, Air Quality Alert , Special Statement , Air Quality Alert , Record Report
Arkansas - Severe Thunderstorm Watch
California - Wind Advisory , Excessive Heat Warning , Heat Advisory , Record Report
Colorado - Special Statement , Record Report , Public Information Statement
Connecticut - Severe Thunderstorm Warning , Areal Flood Advisory
Delaware - Special Statement
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Illinois - Flood Warning , Flood Advisory , Beach Hazard Statement
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Kansas - Public Information Statement
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Louisiana - Flash Flood Warning , Areal Flood Advisory , Special Statement
Maryland - Severe Thunderstorm Warning , Special Statement
Massachusetts - Areal Flood Advisory
Michigan - Beach Hazard Statement
Minnesota - Flood Warning , Areal Flood Warning , Public Information Statement
Mississippi - Flash Flood Warning , Special Statement
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Montana - Severe Thunderstorm Watch , Severe Thunderstorm Warning , Lake Wind Advisory , High Wind Warning , Wind Advisory , Fire Weather Watch , Special Statement
Nevada - Lake Wind Advisory , Fire Weather Warning , Record Report
New Jersey - Special Statement
New Mexico - Public Information Statement
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