Boulder hail storm history
Boulder County·NOAA NCEI Storm Events Database·~75-day publication lag
Boulder sits along the Colorado Front Range, where afternoon convective storms tracking northeast from the Rocky Mountains create a natural corridor for hail formation. Boulder County experiences regular hail activity during late spring and summer months, with the majority of damaging storms occurring between 2 p.m. and 7 p.m. Mountain Time.
Check if your roof was damaged by recent hail
Hail risk in Boulder peaks during May, June, and July, when atmospheric conditions favor the development of severe thunderstorms along the Front Range. April and August represent secondary risk months. Most significant events occur in the afternoon and early evening hours, when solar heating intensifies the convective dynamics that drive hailstone growth.
Annual frequency — last 10 years
When hail hits — monthly pattern
Avg events per month · all years · NOAA data
All recorded hail events
Of 40 recorded events, 5 (13%) reached 1.5" or larger — the threshold for likely functional damage on standard asphalt shingles.
Report from mping.
Picture of 1 inch hail on Twitter.
The report was from 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 ↗