Rockford hail storm history
Winnebago County·NOAA NCEI Storm Events Database·~75-day publication lag
Rockford sits in Winnebago County, a region where fast-moving frontal systems and squall lines from the Great Plains produce some of the highest hail frequency in Illinois. The county's position in northern Illinois places it directly in the path of spring and early-summer severe weather systems that track northward with seasonal jet stream shifts.
Check if your roof was damaged by recent hail
Hail risk in Rockford peaks during April, May, and June, when organized severe weather becomes most common across northern Illinois. Secondary risk extends into March and July as frontal boundaries remain active. Most events occur when cold-air masses collide with warm, moist air from the south, a pattern that intensifies as the jet stream migrates northward in spring.
Annual frequency — last 10 years
When hail hits — monthly pattern
Avg events per month · all years · NOAA data
All recorded hail events
Of 112 recorded events, 32 (29%) reached 1.5" or larger — the threshold for likely functional damage on standard asphalt shingles.
Hail lasted for 10 minutes with the largest hail 1.5 inches in diameter.
A photo was shared with quarter size hail next to a quarter coin.
Quarter size hail was reported southwest of Kirkland. Some melting occurred prior to the observatio…
A photo shared on social media showed quarter size hail near Grand Detour.
Dime to quarter sized hail.
Photos showed hail at least 2 inches in diameter.
Quarter size hail was reported between Loves Park and Rock Cut State Park.
Ping pong ball size hail was reported at Route 64 and Blackhawk Road.
Nickel to quarter size hail was reported near Center and Main Streets.
Quarter to ping pong ball size hail was reported.
Brief penny to quarter size hail was reported.
Reported in Freeport from a separate supercell before the derecho straight-line wind damage occurred…
Hail 2 inches in diameter was reported near Interstate 39.
Emergency management relayed public reports of 1 to 3 inch diameter hail.
Golf ball size hail was reported on Interstate 88 near Ashton.
A morning storm produced heavy rain and pea to penny size hail in Stephenson County.
A trained spotter reported hail up to the size of pennies to quarters.
Hail ranging from 1.5 to 2.0 inches in diameter was reported from multiple locations around and to t…
Hail was mostly pea size with some larger penny size hail stones.
Quarter size hail was reported at multiple locations.
Quarter to half dollar size hail was reported in numerous locations including near north State Stree…
Nickel size hail was reported 2 miles north of Belvidere.
There were multiple reports of quarter to golf ball size hail in Machesney Park. Damage to cars was…
Nickel size hail was reported at the intersection of East State Street and Regan Street.
Nickel size hail was reported near Harrison Avenue and Mulford Road.
There were also reports of 55 to 60 mph winds and very heavy rainfall with visibilities around 200 f…
Quarter sized hail near Barker Rd.
NOAA National Centers for Environmental Information Storm Events Database. Publication lag is approximately 75 days — current-year events may be incomplete.
NOAA Storm Events Database ↗