Norman hail storm history
Cleveland County·NOAA NCEI Storm Events Database·~75-day publication lag
Norman, located in Cleveland County, has experienced 4 hailstorms producing hail 1 inch or larger over the past 10 years, with 1 significant event of 1.5 inches or greater. The city sits in the heart of Tornado Alley where the dryline, jet stream, and Gulf moisture converge to produce some of the most intense supercell thunderstorms in the world.
Hail season in Norman runs April through June, with May historically producing the most damaging large-hail events. The secondary risk months of March and July also warrant attention. The geographic and atmospheric conditions that make this region prone to severe weather mean homeowners should prepare storm response plans during these months.
Annual frequency — last 10 years
When hail hits — monthly pattern
Avg events per month · all years · NOAA data
All recorded hail events
Of 408 recorded events, 125 (31%) reached 1.5" or larger — the threshold for likely functional damage on standard asphalt shingles.
An image was relayed by a National Severe Storms Laboratory meteorologist. The location is approxima…
The report was relayed through mPING.
The report was relayed through mPING.
The report was relayed by emergency management. The location is approximate.
The report was relayed through mPING.
The report was relayed through mPING.
The report was relayed through mPING.
The report was relayed through mPING.
The report was relayed through mPING.
Event time estimated from radar observations.
The report was relayed through mPING.
Location is approximate.
MPing report.
MPing report.
MPing report.
MPing report.
Image relayed through broadcast media. Time is radar estimated.
MPing report.
Social media video. Time is radar estimated.
MPing report.
Social media video. Most hailstones were smaller than listed magnitude. Time is radar estimated.
Relayed report. Time and location are estimated.
MPing report.
MPing report.
Based on radar evidence, hailfall likely occurred prior (0045-0055 LST) to report time.
MPing report.
Social media photo.
MPing report.
MPing report.
MPing report.
Hailfall likely occurred prior to report time (between 1600-1610 CST) based on radar evidence.
Time and location were estimated via radar.
Time estimate from radar.
Significant damage to mobile home siding reported.
Time estimate.
Reported from Mping.
From Mping.
Time estimate from radar.
Mping report.
Time estimated from radar.
Reported via MPing.
Norman's 10-year event count reflects documented hail reports meeting National Weather Service verification standards. Smaller hail events below 1 inch may occur more frequently but are not included in this dataset. Cleveland County as a whole has a longer historical record showing 57 documented hail events of 1 inch or larger, which provides broader context for the area's hail risk. 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