St. Louis hail storm history
St. Louis City·NOAA NCEI Storm Events Database·~75-day publication lag
St. Louis City has recorded zero hail events of 1 inch or larger over the past 10 years according to NOAA Storm Events data. This lower event count reflects both the city's location relative to typical hail corridors and the reporting density limitations of urban areas, where severe weather documentation may not capture all localized damage.
St. Louis experiences its highest hail risk during April, May, and June, when organized mesoscale convective systems and bow echoes track northeast from the Plains. March and July represent secondary risk months. These spring squall lines can produce widespread hail across the region despite the relatively low recorded event frequency in the immediate city boundaries.
Annual frequency — last 10 years
When hail hits — monthly pattern
Avg events per month · all years · NOAA data
All recorded hail events
Of 281 recorded events, 93 (33%) reached 1.5" or larger — the threshold for likely functional damage on standard asphalt shingles.
Missouri State Highway Patrol reported golf ball sized hail in Florissant.
The photo of the hailstone was received via social media.
An NWS employee reported hail falling that was at least quarter sized.
Individual reported quarter sized hail that was 2 to 3 inches deep on the ground.
There were numerous reports of 1 to 2 inch hailstones in eastern St. Charles County impacting St. Pe…
Up to 1 inch hail fell between Kirkwood and Brentwood.
Reports of 1 inch hailstones in Weldon Spring, Harvester, and St. Charles.
Another wide swath of large hail fell across St. Louis County up to two inches in diameter. The larg…
A discrete thunderstorm briefly produced up to 1 inch hail as it entered Jefferson County. No damage…
A discrete thunderstorm produced mainly half inch to nickel sized hailstones in southern St. Louis C…
Large hail up to two inches in diameter was reported in Florissant, Black Jack and Spanish Lake area…
A wide swath of large hail was reported in northern portions of St. Louis County. The areas that had…
A wide swath of large hail fell across northern portions of St. Louis County. Large hail was reporte…
A wide swath of large hail up to golf ball sized hail fell over Wildwood, Ellisville, Manchester, Ba…
A wide swath of large hail, up to two inches in diameter, fell across portions of St. Louis County i…
A wide swath of large hail fell across the southern portions of St. Charles County. The National Wea…
A wide swath of large hail between an inch and 1.25 inches in diameter fell along the I-270 corridor…
A wide swath of large hail fell across the area, mainly between O'Fallon and Cottleville.
A wide swath of large hail fell across the St. Louis metro area. Hail between one and two inches in …
Large hail up to the size of golfballs fell across the far southern portions of the city, in the Car…
A wide swath of large hail up to golf ball size fell in an area from western St. Louis County to nor…
A wide swath of large hail fell in an area from Chesterfield through Ballwin/Manchester area to Town…
NOAA Storm Events reporting density is lower in St. Louis City compared to rural areas, meaning the zero recorded events over 10 years may underestimate actual hail exposure and localized damage. Homeowners who experience hail damage should document losses independently, as event data gaps are common in urban settings. 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