Public Information Statement
Issued by NWS Jackson, MS

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NOUS44 KJAN 012148
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ARZ074-075-LAZ007>009-015-016-023>026-MSZ018-019-025>066-072>074-
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PUBLIC INFORMATION STATEMENT
NATIONAL WEATHER SERVICE JACKSON MS
446 PM CDT Fri Sep 1 2017

...NWS DAMAGE SURVEYS FOR 8/30/17 TORNADO EVENT...

.UPDATE...
Updated narrative for Central Lamar County tornado after survey team
was able to gain access to the damage site.

.Central Lamar Tornado...

Rating:                 EF1
Estimated Peak Wind:    105 mph
Path Length /statute/:  1.71 miles
Path Width /maximum/:   100 yards
Fatalities:             0
Injuries:               0

Start Date:             08/30/2017
Start Time:             10:04 AM CDT
Start Location:         7 W Purvis, Lamar County, MS
Start Lat/Lon:          31.1606/-89.5365

End Date:               08/30/2017
End Time:               10:07 AM CDT
End Location:           8 WNW Purvis, Lamar County, MS
End Lat/Lon:            31.1853/-89.5392

Survey Summary: This tornado touched down in a wooded area just
north of Purvis to Columbia Road, near the intersection of B Young
Road. The tornado tracked through an area with fairly young, long
leaf pines (10-20ft tall) and managed to uproot/snap several near
the trail where the property was accessed. As the tornado crossed
the transmission line clearing, several more trees were damaged
along with a V based truss tower taken down. Information from the
power crew engineers noted that these sort of V truss towers are
rated for 100 mph winds. The collapse of this tower, with 100 mph
winds, was supported by similar tree damage in and around that
location. A TDS from both KLIX/KDGX was noted with a well defined
signature. Of note, the presence of the clear TDS seemed to be aided
by the tornado traveling through the long leaf pine forest and those
extra long needles offering a larger variety of oddly shaped
targets for the CC product to indicate.

.Petal Tornado...

Rating:                 EF1
Estimated Peak Wind:    90 mph
Path Length /statute/:  1.26 miles
Path Width /maximum/:   160 yards
Fatalities:             0
Injuries:               0

Start Date:             08/30/2017
Start Time:             11:41 AM CDT
Start Location:         1 W Petal, Forrest County, MS
Start Lat/Lon:          31.3462/-89.2692

End Date:               08/30/2017
End Time:               11:45 AM CDT
End Location:           2 NW Petal, Forrest County, MS
End Lat/Lon:            31.3644/-89.2713

Survey Summary:
This tornado touched down in Petal along West Central Ave. Here,
two businesses sustained minor roof damage with a portion of the
roof peeled off. Several trees were uprooted and a fence was blown
down. As the tornado move northward, a few more trees were downed
along with limbs broken off trees. Along Stevens St, a large tree
crushed two vehicles. More minor tree damage occurred across several
streets before the tornado crossed the intersection of Highway 11
and the Evelyn Gandy Parkway, here more trees were damaged. The
tornado lifted after it crossed into the wooded area north of the
Parkway near the Leaf River. Maximum winds were around 90 mph.

.Eastern Jefferson Davis Tornado...

Rating:                 EF0
Estimated Peak Wind:    77 mph
Path Length /statute/:  1.08 miles
Path Width /maximum/:   50 yards
Fatalities:             0
Injuries:               0

Start Date:             08/30/2017
Start Time:             12:35 PM CDT
Start Location:         5 N Bassfield, Jefferson Davis County, MS
Start Lat/Lon:          31.5687/-89.7513

End Date:               08/30/2017
End Time:               12:37 PM CDT
End Location:           6 N Bassfield, Jefferson Davis County, MS
End Lat/Lon:            31.5842/-89.7529

Survey Summary:
This brief tornado touched down at Williams Ln, just off Highway
35, and tracked north for about 1 mile. At Williams Ln, a large
tree was blown down onto a truck, the tree was laid to the west.
Other large limbs and tree debris was also blown down here and
laid to the west. The tornado broke off several limbs a Granby
Road where it then dissipated. Maximum winds were around 77 mph.

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 200mph
EF5...Violent...>200mph

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

$$

BP/CE


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