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Local Storm Report



08/02/2015 0240 PM

5 miles se of Des Plaines, Cook County.

Hail e0.88 inch, reported by trained spotter.


            Dime to nickel size hail and Cumberland and berywn.




08/02/2015 0240 PM

Ohare Airport, Cook County.

Thunderstorm wind gust m52.00 mph, reported by ASOS.





08/02/2015 0242 PM

Rosemont, Cook County.

Thunderstorm wind damage, reported by Emergency Mngr.


            Dome practice facility damaged. Time estimated using
            radar.




08/02/2015 0245 PM

4 miles NW of Montrose harbplaines, Cook County.

Hail e1.00 inch, reported by cocorahs.


            Strong winds and heavy rain fall.




08/02/2015 0250 PM

5 miles NNW of Lincoln Parkrose harbplaines, Cook County.

Hail e1.00 inch, reported by cocorahs.





08/02/2015 0253 PM

Evanston, Cook County.

Hail e1.00 inch, reported by trained spotter.


            Also small 1 inch branches down.




08/02/2015 0253 PM

NW Chicago, Cook County.

Hail m1.00 inch, reported by trained spotter.





08/02/2015 0255 PM

Evanston, Cook County.

Thunderstorm wind damage, reported by trained spotter.


            Sheridan Road and kedzie. 2.5 foot round diameter tree 30
            ft tall completely uprooted. Time estimated based on
            radar.




08/02/2015 0256 PM

Evanston, Cook County.

Hail m1.00 inch, reported by trained spotter.





08/02/2015 0257 PM

3 miles S of Evanston, Cook County.

Thunderstorm wind damage, reported by law enforcement.


            *** 1 inj *** numerous large trees down in Rogers Park
            area. One man injured by a falling tree near Touhy and
            kedzie.




08/02/2015 1143 PM

Worth, Cook County.

Hail e1.00 inch, reported by law enforcement.


            Mainly dime sized but several quarter sized hail stones.
            Also estimated 40 to 50 mph winds.




08/02/2015 1143 PM

Worth, Cook County.

Hail e1.00 inch, reported by law enforcement.


            Mainly dime sized but several quarter sized hail stones.
            Also estimated 40 to 50 mph winds.





08/02/2015 1143 PM

Worth, Cook County.

Hail e1.00 inch, reported by law enforcement.


            Mainly dime sized but several quarter sized hail stones.
            Also estimated 40 to 50 mph winds.





08/02/2015 1031 PM

1 miles E of Palatine, Cook County.

Hail m1.50 inch, reported by cocorahs.






08/02/2015 1031 PM

1 miles E of Palatine, Cook County.

Hail m1.50 inch, reported by cocorahs.






08/02/2015 1100 PM

6 miles NNE of Forest Park, Cook County.

Thunderstorm wind damage, reported by trained spotter.


            Approximately 8 inch diameter tree branch snapped on
            northwest side of Chicago in Belmont neighborhood. Also
            dime sized hail.





08/02/2015 1031 PM

Palatine, Cook County.

Hail e1.75 inch, reported by trained spotter.


            Northwest Highway and Palatine Road.





08/02/2015 1031 PM

Palatine, Cook County.

Hail e1.75 inch, reported by trained spotter.


            Northwest Highway and Palatine Road.





08/02/2015 1032 PM

Palatine, Cook County.

Hail m2.00 inch, reported by public.


            Via photo on social media. Time estimated by radar.





08/02/2015 1032 PM

Palatine, Cook County.

Hail m2.00 inch, reported by public.


            Via photo on social media. Time estimated by radar.





08/02/2015 1030 PM

Palatine, Cook County.

Hail e1.50 inch, reported by trained spotter.


            One quarter mile north of northwest Highway on Smith
            Road.





08/02/2015 1030 PM

Palatine, Cook County.

Hail e1.50 inch, reported by trained spotter.


            One quarter mile north of northwest Highway on Smith
            Road.





08/02/2015 1025 PM

Barrington, Cook County.

Hail m1.25 inch, reported by public.


            Report relayed via facebook.





08/02/2015 1025 PM

Barrington, Cook County.

Hail m1.25 inch, reported by public.


            Report relayed via facebook.





08/02/2015 1036 PM

Arlington Heights, Cook County.

Hail e1.00 inch, reported by public.


            Quarter size hail at intersection of Rand and Hintz
            roads. Via facebook.





08/02/2015 1036 PM

Arlington Heights, Cook County.

Hail e1.00 inch, reported by public.


            Quarter size hail at intersection of Rand and Hintz
            roads. Via facebook.



Public Information Statement

Statement as of 8:35 PM CDT on August 03, 2015


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

.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



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