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Illinois, McHenry

Local Storm Report



08/02/2015 0929 PM

1 miles WNW of Wonder Lake, McHenry County.

Hail m1.00 inch, reported by cocorahs.


            Delayed report.





08/02/2015 1006 PM

Crystal Lake, McHenry County.

Hail e1.75 inch, reported by public.


            Golf Ball size hail reported via social media. Time
            estimated by radar.





08/02/2015 0929 PM

1 miles WNW of Wonder Lake, McHenry County.

Hail m1.00 inch, reported by cocorahs.


            Delayed report.





08/02/2015 1015 PM

2 miles E of Algonquin, McHenry County.

Hail e1.50 inch, reported by trained spotter.


            Mainly quarter sized hail with a few to ping pong Ball
            sized.





08/02/2015 1006 PM

Crystal Lake, McHenry County.

Hail e1.75 inch, reported by public.


            Golf Ball size hail reported via social media. Time
            estimated by radar.





08/02/2015 1010 PM

Crystal Lake, McHenry County.

Hail m1.00 inch, reported by public.


            Report relayed via facebook. Route 120 and Crystal Lake
            Road.





08/02/2015 1015 PM

2 miles E of Algonquin, McHenry County.

Hail e1.50 inch, reported by trained spotter.


            Mainly quarter sized hail with a few to ping pong Ball
            sized.





08/02/2015 0927 PM

1 miles N of Richmond, McHenry County.

Hail m1.00 inch, reported by public.


            Report relayed via facebook. Location on Illinois
            Wisconsin border on Route 12.





08/02/2015 0950 PM

McHenry, McHenry County.

Thunderstorm wind gust m60 mph, reported by trained spotter.


            Route 31 and Bull Valley Road. Also 1/2 inch diameter
            hail.





08/02/2015 0929 PM

1 miles WNW of Wonder Lake, McHenry County.

Hail m1.00 inch, reported by cocorahs.


            Delayed report.





08/02/2015 0929 PM

1 miles WNW of Wonder Lake, McHenry County.

Hail m1.00 inch, reported by cocorahs.


            Delayed report.





08/02/2015 1006 PM

Crystal Lake, McHenry County.

Hail e1.75 inch, reported by public.


            Golf Ball size hail reported via social media. Time
            estimated by radar.





08/02/2015 1006 PM

Crystal Lake, McHenry County.

Hail e1.75 inch, reported by public.


            Golf Ball size hail reported via social media. Time
            estimated by radar.





08/02/2015 1015 PM

2 miles E of Algonquin, McHenry County.

Hail e1.50 inch, reported by trained spotter.


            Mainly quarter sized hail with a few to ping pong Ball
            sized.





08/02/2015 1015 PM

2 miles E of Algonquin, McHenry County.

Hail e1.50 inch, reported by trained spotter.


            Mainly quarter sized hail with a few to ping pong Ball
            sized.





08/02/2015 1010 PM

Crystal Lake, McHenry County.

Hail m1.00 inch, reported by public.


            Report relayed via facebook. Route 120 and Crystal Lake
            Road.





08/02/2015 1010 PM

Crystal Lake, McHenry County.

Hail m1.00 inch, reported by public.


            Report relayed via facebook. Route 120 and Crystal Lake
            Road.





08/02/2015 0959 PM

McHenry, McHenry County.

Hail m1.25 inch, reported by public.


            Report relayed via facebook. Ringwood and Route 120.





08/02/2015 0959 PM

McHenry, McHenry County.

Hail m1.25 inch, reported by public.


            Report relayed via facebook. Ringwood and Route 120.





08/02/2015 0934 PM

Wonder Lake, McHenry County.

Hail e0.88 inch, reported by trained spotter.


            Thompson Road 1 mile north of Route 120.





08/02/2015 0934 PM

Wonder Lake, McHenry County.

Hail e0.88 inch, reported by trained spotter.


            Thompson Road 1 mile north of Route 120.





08/02/2015 0950 PM

McHenry, McHenry County.

Thunderstorm wind gust m60 mph, reported by trained spotter.


            Route 31 and Bull Valley Road. Also 1/2 inch diameter
            hail.





08/02/2015 0950 PM

McHenry, McHenry County.

Thunderstorm wind gust m60 mph, reported by trained spotter.


            Route 31 and Bull Valley Road. Also 1/2 inch diameter
            hail.





08/02/2015 0927 PM

1 miles N of Richmond, McHenry County.

Hail m1.00 inch, reported by public.


            Report relayed via facebook. Location on Illinois
            Wisconsin border on Route 12.





08/02/2015 0927 PM

1 miles N of Richmond, McHenry County.

Hail m1.00 inch, reported by public.


            Report relayed via facebook. Location on Illinois
            Wisconsin border on Route 12.



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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