Public Information Statement
Issued by NWS Des Moines, IA

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NOUS43 KDMX 141618

Public Information Statement
National Weather Service Des Moines IA
1118 AM CDT Sat Apr 14 2018


A line of thunderstorms developed in western Iowa late in the
afternoon on Friday April 13th 2018. The line of thunderstorms
moved from south south-west to north-north east throughout the
evening and into the overnight hours across Iowa, with new
development on the south side of the line extending its coverage
area. Several of the storms embedded in this line were severe.
The line of thunderstorms resulted in strong damaging winds and
hail. The damage reports are consistent with straight line winds.

The most substantial straight line wind damage was reported from
Jefferson, IA in Greene County. The severe thunderstorm entered
Jefferson shortly before 6:00 PM. The straight line winds removed
shingles and portions of roofs from several buildings in town.
Multiple weak trees were reported snapped with several branches
down across town. Streets signs and weak structures such as tool
sheds were blown down. This debris was lofted, penetrating
buildings with steel siding and damaging large recycling bins.
Winds speeds with this damage are estimated to be between 70 and
80 miles per hour. In addition to the straight line wind damage,
hail between 1.0 and 1.75 inches in diameter were reported in
Jefferson as well as other locations in Greene County.

Thunderstorm wind damage was also reported in Story City, with
damage to farm structures and buildings in an industrial park. The
straight line winds also caused power poles to lean away from
their center point.

Along this line of thunderstorms, wind gusts of and in excess of
58 miles per hour were reported from Atlantic to Fort Dodge to
Boone to Iowa Falls.

If you have any damage reports or pictures, please feel free to
share them with the National Weather Service in Des Moines by
e-mailing to


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