Moore hail storm history
Cleveland County·NOAA NCEI Storm Events Database·~75-day publication lag
Moore is located in Cleveland County, Oklahoma, where hail-producing thunderstorms occur frequently during spring months. Over the past 10 years, Cleveland County has recorded 7 hail events of 1 inch or larger, with the largest recorded hailstone measuring 1.75 inches in diameter. This frequency reflects Moore's position in Tornado Alley, where atmospheric conditions regularly align to produce severe supercell thunderstorms.
Hail season in Moore peaks from April through June, with May historically producing the most damaging large-hail events. The convergence of the dryline, jet stream, and Gulf moisture creates conditions favorable for intense supercell development. Secondary hail risk occurs in March and July, though storms during these months typically produce smaller hail with less structural impact.
Annual frequency — last 10 years
When hail hits — monthly pattern
Avg events per month · all years · NOAA data
All recorded hail events
Of 166 recorded events, 50 (30%) reached 1.5" or larger — the threshold for likely functional damage on standard asphalt shingles.
The report was relayed through mPING.
The report was relayed through Spotter Network.
The report was relayed through mPING.
The report was relayed through mPING.
The report was relayed through mPING.
The report was relayed through mPING.
Social media report.
The report was relayed through mPING.
MPing report.
MPing report.
MPing report.
Social media image with digital caliper measurement. Time is radar estimated.
MPing report.
MPing report.
MPing report. Based on radar evidence, hailfall likely occurred prior (0030-0040 LST) to report time…
MPing report.
MPing report.
Photo shared via social media. Time is radar estimated.
MPing report.
MPing report.
North side windows broken on multiple homes.
Reported from Mping.
Roof totaled due to hail damage. Time estimate from radar.
Dime to quarter size hail fell for about 3-4 minutes.
Also reported 56 mph wind and power outages.
Moore's hail event count of 7 events in 10 years reflects NOAA's National Weather Service reporting density for Cleveland County. Because Moore is a smaller city, individual hail swaths may not always trigger formal reports—the actual number of hail-producing storms affecting the city may be higher, particularly for smaller hail below 1 inch. The largest recorded event (1.75 inches on June 3, 2025) exceeded the damage threshold for standard asphalt shingles and likely caused functional losses. 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