Alamosa hail storm history
Alamosa County·NOAA NCEI Storm Events Database·~75-day publication lag
Alamosa County has recorded 2 documented hail events in NOAA records, with the largest measuring 0.88 inches in diameter. Over the past 10 years, Alamosa has not experienced any hail events of 1 inch or larger, placing it among Colorado's lower-risk hail zones. The town's location in the San Luis Valley provides some natural protection from the hail-producing storm systems that more frequently impact higher-elevation and eastern Colorado counties.
Hail in Alamosa, when it occurs, follows the broader Colorado seasonal pattern with peak activity concentrated in May, June, and July. Secondary risk periods extend into April and August as spring and early fall storm systems move through the region. The relatively low frequency of significant hail events means that even during peak months, large damaging hail is uncommon in Alamosa compared to other Colorado municipalities.
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, 0 (0%) reached 1.5" or larger — the threshold for likely functional damage on standard asphalt shingles.
A trained spotter reported hail of 0.88 inches in diameter.
NOAA's hail database relies on trained spotters and damage reports, which means small towns and rural areas like Alamosa may have incomplete event records. The absence of 1-inch-or-larger events in the 10-year dataset reflects both genuine low incidence and potential underreporting of smaller hail events that cause minimal property damage.
NOAA Storm Events Database source