La Salle Severe Watches & Warnings NOAA Weather Radio

Public Information Statement
Statement as of 8:35 PM CDT on August 3, 2015

... NWS damage survey results for August 2 2015 Lake County IL

.Round Lake to Hainesville to Grayslake to Wildwood IL...

Rating: EF-1
estimated peak wind: 90 to 100 mph
path length: 7.5 miles
maximum path width: 300 yards
fatalities: 0
injuries: 0

Start date: August 2 2015
start time: 838 PM CDT
start location: 0.5 mi SSW of Round Lake IL
start lat/lon: 42.3503 -88.0972

End date: August 2 2015
end time: 853 PM CDT
end location: Wildwood IL
end lat/lon: 42.3428 -87.9505

Survey summary:

A supercell thunderstorm quickly produced a tornado that first
resulted in tree damage in Round Lake near Cedar Lake Road. The
tornado then moved east... and along its 7.5 mile path damaged hundreds
of trees including dozens at the base and dozens being uprooted.
The most significant tree damage was consistent with mid EF-1
intensity and when the tornado was at its widest in subdivisions of
Grayslake and Wildwood. A roof was blown off of a restaurant along
Illinois Route 134... with a sign from the restaurant ending up over
two miles away in Grayslake. Several homes and businesses suffered roof
damage from either falling trees or loss of shingles. A large part of
the roof of the Grayslake Central High school was blown across the
street. A nearby skatepark was also heavily damaged. The last points of
damage were noted along Illinois Route 120 just west of Interstate 94
in unincorporated Wildwood.

As an item of interest... this was the first tornado in Lake County
Illinois since April 18 2002 when a brief EF-0 tornado occurred. This
was the longest path tornado in the County since July 6 1986.

The National Weather Service would like to thank Lake County emergency
management for assisting with the survey.

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