Arvada hail storm history
Jefferson County·NOAA NCEI Storm Events Database·~75-day publication lag
Arvada sits in Jefferson County, where the interaction of afternoon convective storms and Front Range terrain creates conditions for hail development. Over the past 10 years, NOAA records show no documented hail events of 1 inch or larger in Arvada proper, though the broader Jefferson County region has experienced 6 such events during this period.
Hail risk in Arvada is highest from May through July, when afternoon convective storms tracking northeast from the Rocky Mountains are most likely to develop. Secondary risk occurs in April and August. Most significant events occur between 2 p.m. and 7 p.m. Mountain Time, when solar heating is strongest.
Annual frequency — last 10 years
When hail hits — monthly pattern
Avg events per month · all years · NOAA data
All recorded hail events
Of 18 recorded events, 1 (6%) reached 1.5" or larger — the threshold for likely functional damage on standard asphalt shingles.
The report was from mping.
The report was via mping.
Arvada's low count of recorded large-hail events reflects both the relative rarity of 1-inch-or-greater hail at any single location and the density of NOAA's reporting network. Storm Events Database records are submitted by National Weather Service offices and trained spotters, meaning smaller events in less-populated areas may not be captured. Current-year data is excluded from the annual frequency table until October, when NOAA's Storm Events Database has processed the full hail season accounting for the standard 75-day reporting lag.
NOAA Storm Events Database source