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000
NOUS43 KABR 161744
PNSABR
SDZ011-020-022-170545-

Public Information Statement
National Weather Service Aberdeen SD
1244 PM CDT Mon Sep 16 2019

...UPDATED TORNADO INFORMATION FOR THE 09/09/2019 EVENT... 

.UPDATE...Updated to add a tornado near the Watertown airport and
to update information on tornadoes 2, 4, and 5 from high resolution
satellite imagery.

.TORNADO #1...

Rating:                 EF-0
Estimated peak wind:    70 mph
Path length /Statute/:  2.5 miles
Path width /Maximum/:   20 yards
Fatalities:             0
Injuries:               0

Start date:             September 9 2019
Start time:             3:37 PM CDT
Start location:         4.5 W Watertown/Codington County/SD
Start Lat/Lon:          44.8943/-97.2062

End date:               September 9 2019
End time:               3:41 PM CDT
End location:           2.5 WNW Watertown/Codington County/SD
End_lat/lon:            44.9164/-97.1637

The tornado tracked across farm fields and was photographed near
the Watertown airport at 3:40 PM CDT.

.TORNADO #2...

Rating:                 EF-0
Estimated peak wind:    80 mph
Path length /Statute/:  3.2 miles
Path width /Maximum/:   40 yards
Fatalities:             0
Injuries:               0

Start date:             September 9 2019
Start time:             3:39 PM CDT
Start location:         1 S Thomas/Hamlin County/SD
Start Lat/Lon:          44.7497/-97.2096

End date:               September 9 2019
End time:               3:45 PM CDT
End location:           2 NE Thomas/Hamlin County/SD
End_lat/lon:            44.7813/-97.1620

The tornado started around 0.75 miles south of Thomas, SD on 450th
Ave. It continued northeast and was witnessed crossing SD Highway
22 before damaging trees and outdoor lawn items as it passed close
to a house. The tornado then moved northeast across Clear Lake and
crossed County Highway H. The tornado crossed a corn field before
damaging several metal beams on a quonset barn. Several outbuildings
and a silo were damaged on the farm before the tornado moved and
snapped several branches and uprooted a few trees along a shelterbelt.


.TORNADO #3...

Rating:                 EF-0
Estimated peak wind:    73 mph
Path length /Statute/:  0.1 miles
Path width /Maximum/:   10 yards
Fatalities:             0
Injuries:               0

Start date:             September 9 2019
Start time:             6:55 PM CDT
Start location:         3 N Webster/Day County/SD
Start Lat/Lon:          45.3805/-97.5119

End date:               September 9 2019
End time:               6:56 PM CDT
End location:           3 N Webster/Day County/SD
End_lat/lon:            45.3812/-97.5101

A witness observed a tornado touch down over a lake and then track on to pasture land
before quickly lifting. The tornado remained on the ground for about one minute. No
damage occurred.

.TORNADO #4...

Rating:                 EF-1
Estimated peak wind:    90 mph
Path length /Statute/:  1.6 miles
Path width /Maximum/:   80 yards
Fatalities:             0
Injuries:               0

Start date:             September 9 2019
Start time:             8:03 PM CDT
Start location:         4 N Bristol/Day County/SD
Start Lat/Lon:          45.4083/-97.7402

End date:               September 9 2019
End time:               8:11 PM CDT
End location:           4 N Bristol/Day County/SD
End_lat/lon:            45.4099/-97.7082

The tornado touched down in a field west of 424th Ave, crossed the
road and tracked along the northern edge of a farmstead 4 miles north
of Bristol, SD. Multiple broken tree branches were noted, with some
tossed 50 to 80 yards from the original source. One fiberglass shed was
destroyed and tossed about 70 yards. Another outbuilding was lifted off
the foundation and set down about 30 yards away. The tornado continued
east of the farmstead, crossing two small lakes. The track was clearly
shown by cattails flattened in a convergent pattern. The tornado then
struck another tree with limbs broken and tossed. The final evidence of
the tornado was a downed deer stand.

.TORNADO #5...

Rating:                 EF-0
Estimated peak wind:    73 mph
Path length /Statute/:  0.2 miles
Path width /Maximum/:   10 yards
Fatalities:             0
Injuries:               0

Start date:             September 9 2019
Start time:             8:14 PM CDT
Start location:         7 NNE Bristol/Day County/SD
Start Lat/Lon:          45.4261/-97.6842

End date:               September 9 2019
End time:               8:15 PM CDT
End location:           7 NNE Bristol/Day County/SD
End_lat/lon:            45.4281/-97.6815

A short tornado track was observed in an area where cattails were
flattened in a convergent pattern. Witnesses also observed the brief
touchdown.

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.

$$

SRF