Grand Junction hail storm history
Mesa County·NOAA NCEI Storm Events Database·~75-day publication lag
Grand Junction in Mesa County experiences hail less frequently than other Colorado regions, with 2 documented hail events of 1 inch or larger over the past 10 years. The most recent significant event occurred on June 6, 2025, when a severe storm tracked southeast through the Grand Valley producing hail up to 1.75 inches in diameter. Geographic factors related to the Grand Valley's terrain influence the frequency and timing of hail development in this area.
Hail in Grand Junction peaks during June, July, and August, with May representing a secondary risk month. This seasonal window is delayed 4 to 6 weeks relative to the Colorado Front Range due to Grand Junction's mountain geography and local heating patterns. Afternoon convective storms are the primary mechanism for hail generation during these months, typically developing as moisture interacts with the elevated terrain surrounding the Grand Valley.
Annual frequency — last 10 years
When hail hits — monthly pattern
Avg events per month · all years · NOAA data
All recorded hail events
Of 12 recorded events, 1 (8%) reached 1.5" or larger — the threshold for likely functional damage on standard asphalt shingles.
At 908 MST on September 12, a CoCoRaHS observer reported 0.75 inch diameter hail 5 miles NW of Mack,…
Between 1625 and 1650 MST, a severe storm tracked southeast through the Grand Valley from Fruita thr…
COOP Observer reported hail of an estimated 0.88 inches, comparable to a Nickle, in the Orchard Mesa…
A severe thunderstorm moved across the Grand Junction area from downtown to the airport, producing 0…
Nickel size hail was reported 2 miles west of Palisade in Mesa County.
Hail estimated to be the size of quarters accumulated on the road near Skyway on the Grand Mesa. The…
A severe thunderstorm produced large hail estimated to be the size of quarters south-southeast of De…
A severe thunderstorm dropped mostly dime-sized hail as well as some stones estimated to be the size…
Quarter-sized hail fell in Palisade.
Quarter-sized hail was observed at Highline Lake State Park.
The count of 2 events ≥1 inch in the past 10 years reflects a genuine low-frequency hail environment for Grand Junction compared to other Colorado cities. NOAA Storm Data records 5 total documented hail events for Mesa County over the available record period, indicating that Grand Junction's location relative to typical storm tracks and its valley geography result in below-average hail exposure.
NOAA Storm Events Database source