Thornton hail storm history
Adams County·NOAA NCEI Storm Events Database·~75-day publication lag
Thornton is located in Adams County on the northern Front Range of Colorado, where afternoon convective storms tracking northeast from the Rocky Mountains create seasonal hail risk. The city's position along this weather corridor exposes it to thunderstorms that develop and intensify as they move across the region.
Check if your roof was damaged by recent hail
Hail risk in Thornton peaks during May, June, and July, when warm afternoon conditions fuel thunderstorm development across the Front Range. April and August present secondary risk periods. Most significant hail events occur between 2 p.m. and 7 p.m. Mountain Time, when atmospheric instability is greatest.
Annual frequency — last 10 years
When hail hits — monthly pattern
Avg events per month · all years · NOAA data
All recorded hail events
Of 2 recorded events, 1 (50%) reached 1.5" or larger — the threshold for likely functional damage on standard asphalt shingles.
The report was via mping.
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 ↗