McHenry County Weather

06/19/2026

Father's Day this year is also Summer Solstice.

Sunday, June 21, 2026 at 3:25 a.m. CDT is the longest day of the year with over 15 hours of sunlight to our region, it also marks the suns turn to a southerly progression and our days will be getting shorter with less day light each day.

06/18/2026

Forecast for Thursday thru Sunday

06/18/2026

We are shutting down our ops for today.

06/18/2026

Here is great web browser radar that I use along with the radar omega app on my phone and desktop

Real-time, high-resolution weather data to protect you, your community, and property from nature's fury.

06/18/2026

NWS has canceled the current warning for McHenry County.

06/18/2026

ILC111-180230-
/O.CON.KLOT.SV.W.0147.000000T0000Z-260618T0230Z/
McHenry IL-
908 PM CDT Wed Jun 17 2026..A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 930 PM CDT
FOR NORTHERN MCHENRY COUNTY...
At 907 PM CDT, severe thunderstorms were located along a line
extending from Camp Lake to near Wonder Lake to near Harvard, moving
east at 45 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
Locations impacted include...
McHenry, Woodstock, Fox Lake, Harvard, Johnsburg, Lakemoor, Spring
Grove, Wonder Lake, Pistakee Highlands, Genoa City, Richmond, Hebron,
Bull Valley, McCullom Lake, Ringwood, and Greenwood.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4232 8820 4232 8871 4239 8871 4250 8843
4249 8820
TIME...MOT...LOC 0207Z 284DEG 37KT 4252 8813 4241 8834 4234 8863
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...

06/18/2026

9:00 PM Radar update and EMA spotters are seeing heavy rain.

06/18/2026

Current radar and spotters are seeing storm rotation northwest of Harvard.

06/18/2026

333
WUUS53 KLOT 180131
SVRLOT
ILC007-111-180230-
/O.NEW.KLOT.SV.W.0147.260618T0131Z-260618T0230Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Chicago/Romeoville
831 PM CDT Wed Jun 17 2026

The National Weather Service in Chicago has issued a

* Severe Thunderstorm Warning for...
Northern McHenry County in northeastern Illinois...
Northern Boone County in north central Illinois...

* Until 930 PM CDT.

* At 831 PM CDT, severe thunderstorms were located along a line
extending from near Delavan to near Clinton, moving east at 45 mph.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

IMPACT...Expect damage to roofs, siding, and trees.

* Locations impacted include...
McHenry, Woodstock, Fox Lake, Harvard, Poplar Grove, Johnsburg,
Lakemoor, Twin Lakes, Spring Grove, Wonder Lake, Pistakee
Highlands, Genoa City, Richmond, Sharon, Capron, Hebron, Bull
Valley, McCullom Lake, Ringwood, Chemung, and Greenwood.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 4250 8820 4232 8820 4232 8871 4240 8894
4250 8894
TIME...MOT...LOC 0131Z 284DEG 37KT 4262 8857 4249 8891

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...

06/18/2026

Watching a storm just over the border the northern part of McHenry County might get clipped by.