Data current as of 2026-10-16 · Sourced from NOAA Storm Events
Over the past five years, the National Oceanic and Atmospheric Administration has recorded 391 hail storms within 25 miles of Florissant, MO. Of those, 373 produced hail at least quarter-size — the threshold most insurance carriers consider potentially damaging to asphalt shingles. The largest reported hail in this window was baseball-sized or larger, which can fracture shingle mat and dent metal flashing on contact. 2026 was the most active year on record locally, with 175 documented hail events.
Check Hail History for a Specific Address in Florissant| Severity | Count | What it means for roofs |
|---|---|---|
| Catastrophic | 2 events | Baseball+ size, structural roof damage likely |
| Destructive | 28 events | Egg-size, expect mat fractures and gutter damage |
| Severe | 96 events | Ping pong-size, granule loss and bruising common |
| Significant | 247 events | Quarter-size, the standard insurance damage threshold |
| Moderate | 16 events | Marble-size, possible cosmetic damage |
| Minor | 2 events | Pea-size, unlikely to damage modern shingles |
| Year | Reported Hail Events Within 25 mi |
|---|---|
| 2026 | 175 events |
| 2025 | 161 events |
| 2024 | 23 events |
| 2023 | 28 events |
| 2022 | 3 events |
| 2021 | 1 event |
2026 was the busiest hail year on record locally for Florissant, with 175 documented events inside the 25-mile radius. Storm activity in Florissant typically peaks in spring and early summer, when the jet stream pushes Gulf moisture into the area and supercell thunderstorms become more frequent.
| Date | Location | Severity | Size | NOAA Comments |
|---|---|---|---|---|
| 2026-09-17 | 1 SW Saint Paul, MO | Significant | 1.00" | — |
| 2026-06-25 | Saint Peters, MO | Moderate | 0.75" | — |
| 2026-06-25 | ST PETERS, MO | Moderate | 0.75" | — |
| 2026-05-18 | 1 NNE Oakville, MO | Moderate | 0.70" | NWS employee reported dime-size hail. |
| 2026-05-04 | 2 NNE Bethalto, IL | Moderate | 0.75" | Lasted about 5 minutes. |
| 2026-05-04 | Bethalto, IL | Significant | 1.00" | — |
| 2026-05-04 | 1 SSE Wood River, IL | Moderate | 0.70" | — |
| 2026-05-04 | Saint Ann, MO | Moderate | 0.50" | Half-inch hail estimate near Ashby and St. Charles Rock Road. |
| 2026-05-04 | 3 NW Alton, IL | Moderate | 0.70" | — |
| 2026-05-04 | 1 NE Alton, IL | Severe | 1.75" | Report from mPING: Golf Ball (1.75 in.). |
| 2026-05-04 | 1 NNE Bethalto, IL | Severe | 1.50" | — |
| 2026-05-04 | Alton, IL | Significant | 1.00" | — |
| 2026-05-04 | 1 S Godfrey, IL | Severe | 1.75" | — |
| 2026-05-04 | 3 SW Godfrey, IL | Significant | 1.00" | Report from mPING: Quarter (1.00 in.). |
| 2026-05-04 | Elsah, IL | Minor | 0.25" | — |
| 2026-05-04 | 3 W Alton, IL | Destructive | 2.00" | Email report showing 2 inch stone next to tape measure. time estimated from radar. |
| 2026-05-04 | 2 W Hazelwood, MO | Moderate | 0.70" | Spotter estimated dime size hail fell near McDonnell Blvd and I-270. |
| 2026-05-04 | Overland, MO | Moderate | 0.70" | Pea to dime size hail falling in Overland. Multiple reports have originated from this area. |
| 2026-05-04 | 2 NW Alton, IL | Severe | 1.50" | Report from mPING: Ping Pong Ball (1.50 in.). |
| 2026-05-04 | Dorsey, IL | Moderate | 0.75" | Twitter report. |
NOAA has recorded 162 high-wind events within 25 miles of Florissant, MO in the past five years. Of those, 162 reached severe-thunderstorm thresholds (58+ mph). The highest measured gust was 100 mph.
| Severity | Count |
|---|---|
| Destructive | 1 event |
| Severe | 116 events |
| Significant | 45 events |
| Date | Location | Gust (mph) | Severity | NOAA Comments |
|---|---|---|---|---|
| 2026-07-11 | 3 ESE Kampville, MO | 63 | Significant | Corrects previous tstm wnd dmg report from 3 ESE Kampville. Corrects previous non-tstm wnd gst report from 3 ESE Kampville. backyard weather station in New Town measured 63 mph. |
| 2026-06-25 | KAMPVILLE, MO | 60 | Significant | A severe thunderstorm produced strong winds which brought down power lines and caused damage to trees. |
| 2026-06-25 | FERGUSON, MO | 58 | Significant | A thunderstorm produced strong winds which snapped a large tree. The tree fell onto a garage and damaged it. |
| 2026-06-11 | FENTON, MO | 58 | Significant | Thunderstorm winds snapped a 1-2 foot diameter tree branch in Sunset Hills. |
| 2026-06-01 | OVERLAND, MO | 58 | Significant | Thunderstorm winds downed a tree onto a home on Maddox and Fowler in Overland. |
| 2026-04-28 | Arnold, MO | 60 | Significant | — |
| 2026-04-28 | Saint Ann, MO | 60 | Significant | power outage as the wind gust moved in. |
| 2026-04-27 | ELLISVILLE, MO | 70 | Severe | Thunderstorm winds caused a swath of tree damage extending from Wildwood northeastward through Spanish Lake. The same storm produced damage in Franklin County, so it's likely there was damage southwest of Ellisville as well. Large trees were downed, with one landing on a home near Clarkson Valley and others falling onto cars in Saint Ann. Thunderstorm winds also removed shingles from a home near Saint John and collapsed 4 buildings in Florissant. |
| 2026-04-27 | TOWER GROVE, MO | 58 | Significant | Thunderstorm winds downed one power line on McCausland and one small tree at IKEA. |
| 2026-04-27 | FERNRIDGE, MO | 60 | Significant | Thunderstorm winds uprooted multiple trees in Creve Coeur. |
| 2026-04-17 | HARVESTER, MO | 58 | Significant | Thunderstorm winds knocked a tree onto a powerline. |
| 2026-04-15 | BALLWIN, MO | 58 | Significant | Thunderstorm winds caused a large tree limb to fall onto a house. |
| 2026-03-15 | COLLINSVILLE, IL | 60 | Significant | A TV meteorologist noted several gusts over 60 mph in his station's Storm Runner vehicle. |
| 2026-03-15 | DES PERES, MO | 64 | Severe | Thunderstorm winds blew open a strong steel door in Des Peres before splitting a Bradford Pear tree into 2 near Webster Groves. Winds then blew down tree limbs up to 8 inches in diameter along Green Park Industrial Drive 1 mile southeast of Lakeshire. |
| 2026-03-15 | BRIGHTON, IL | 69 | Severe | Thunderstorm winds downed trees and power lines in Brighton at North Main Street and Oak Street. |
| 2026-03-15 | BUNKER HILL, IL | 58 | Significant | Thunderstorm winds downed power lines near Dorsey. |
| 2026-03-11 | (ALN)STL RGNL ARPT A, IL | 67 | Severe | A 67 mph wind gust was reported at Alton Regional Airport. |
| 2026-03-11 | ORCHARD FARM, MO | 75 | Severe | Thunderstorm winds caused damage to multiple structures in St. Charles County. A roof was removed from an older, open-side car/boat shed along Wilson Road in St. Charles. A barn in northwest St. Charles County sustained significant damage. Winds also broke 3 power poles. |
| 2025-08-17 | (STL)LAMBERT FLD ST, MO | 58 | Significant | The ASOS at Lambert International Airport measured a wind gust of 58 mph from microburst winds. Shortly after, a large oak tree fell onto a home causing significant damage. |
| 2025-08-12 | MILTON, IL | 69 | Severe | Thunderstorm winds knocked down power lines and caused damage to structures near Alton. |
The most recent quarter-size-or-larger hail storm recorded by NOAA within 25 miles of Florissant was on September 17, 2026. HailCheck refreshes from the NOAA Storm Events database daily, so newer events appear here as they are reported.
Florissant averages roughly 78 reported hail events per year within a 25-mile radius. Significant storms (quarter-size or larger) account for 373 of the 391 events recorded over the last five years.
The largest documented hail near Florissant in the last five years was baseball-sized or larger. Most Florissant-area hail falls in the marble-to-quarter range, with destructive storms (egg-size or larger) appearing roughly once every few years.
Most homeowners insurance policies in MO cover hail damage to roofs, siding, and gutters under the dwelling and other-structures coverage. Coverage typically requires the damage to be tied to a verifiable storm date — which is where the NOAA hail history above (and a HAAG-style test square validation) becomes important for the claim file.
Use the HailCheck address search to enter any street address in or near Florissant. HailCheck returns every NOAA hail event within a configurable radius, along with severity bands, dates, and storm narratives for Pro members.
If your property in or near Florissant took on hail during one of the storms above, the standard process for documenting damage is a 10×10 foot test square inspection. A HAAG-trained reviewer counts impact indicators — granule displacement, mat fractures, and bruising — within the marked square and produces a PASS or FAIL document for the claim file.
HailCheck offers a $99 photo-based HAAG-style test square validation. You submit photos from the field, our reviewer evaluates the impact indicators and cross-references the NOAA storm dates listed above, and a written PASS/FAIL determination is returned within one business day. We do not send anyone to the roof — the validation is built around the photos you submit.
Learn About $99 HAAG-Style ValidationFlorissant sits inside the central United States hail belt, where warm Gulf moisture collides with cold continental air to produce supercell thunderstorms capable of dropping the hail documented above. Properties in this zone typically see at least one significant hail event every two to four years.