O'fallon / Gray Summit / Pacific, MO Hail Report
Affected cities: O'fallon, Pacific, Gray Summit, Cedar Hill Lakes, Byrnes Mill, Ellisville, Saint Peters, Winfield, Dardenne Prairie, Moscow Mills
- largest reported hail2.00–2.49″ bandlargest hail
- 2.00″
- reports of 1.00″ or largerreports of 1.00″+
- 15
- radar-estimated 1.00″+ hailradar-estimated 1.00″+
- ~66 sq mi
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Summary
Severe hail activity was reported across the O'fallon / Gray Summit / Pacific corridor. Maximum reported hail size reached 2.00 inches. NOAA radar estimated hail of 1.00 inches or more over about 66 square miles within 5 miles of the reports. 15 qualifying reports measured 1.00 inches or larger, including 2 at 1.75 inches or larger.
On Apr 27, 2026, hail was reported across the O'fallon / Gray Summit / Pacific corridor. Reports concentrated near O'fallon, Pacific, Gray Summit, Cedar Hill Lakes, Byrnes Mill, and Ellisville. The largest reported hailstone measured 2.00 inches. HailPing grouped 15 reports of 1.00 inches or larger into this storm event.
- Affected cities
- O'fallon, Pacific, Gray Summit, Cedar Hill Lakes, Byrnes Mill, Ellisville, Saint Peters, Winfield, Dardenne Prairie, Moscow Mills
- Report time window
- 2:56 PM to 7:10 PM CDT15 qualifying reports of 1.00" or larger
- Radar footprint
- About 66 sq mi of 1.00"+ hail, 1 sq mi of 1.75"+NOAA radar estimate within 5 miles of the reports
- Published
- Apr 29, 2026, 1:40 AM
- Updated
- Oct 23, 2026, 10:01 PM
Report map
Apr 27 · daily radar maximum
Radar-estimated hail size
The white pin is the largest ground report, 2″. The map shows only this one of the storm’s 15 reports of 1″ or larger.
With a free account, the HailPing app pins every hail report for this storm, replays its radar and looks up hail history for any address. Open it in the app
Map geography, storm footprints, and Direct hit or Edge of the hail path boundaries are approximate and may be corrected. HailPing is not an emergency or official weather source. Read the full HailPing Disclaimer
Hail size breakdown
Ground reports by size, 15 reports in all.
- 1.00–1.24"9reports
- 1.25–1.49"4reports
- 1.75–1.99"1report
- 2.00"+1report
What this storm means for your trade
Here is what the app adds for each trade. This storm's full briefing is free with an account; lead lists stay Pro.
What you get for roofing
- The call. Whether this storm is worth working for roofing.
- Ranked neighborhoods by ZIP. Housing units, detached homes and the median year built.
- Roofers and supply stores. How many work the area; the list itself is Pro.
What you get for PDR
- The call. Whether this storm is worth working for PDR.
- The vehicles in the path. How many sat under the hail.
- One Call first list. Dealers, fleets and partners near the direct hit: a few to call free, the full list on Pro.
What you get for auto body
- The call. Whether this storm is worth working for auto body.
- Dealers and repair partners. The ones closest to the hail: a few to call free, the full list on Pro.
- Vehicles under the hail. How many sat right under it.
GO and VERIFY are HailPing assessment labels produced by automated analysis — not verified field conditions and not a guarantee of damage, claims, leads, or revenue. Verify independently before committing crews or marketing spend. Read the full HailPing Disclaimer
Exposure, market, competition, and opportunity figures are modeled estimates for planning — not confirmed damage, claim counts, or lead volume. Read the full HailPing Disclaimer
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Questions about this storm
Did it hail in O'fallon, MO on April 27, 2026?
Severe hail activity was reported across the O'fallon / Gray Summit / Pacific corridor. Maximum reported hail size reached 2.00 inches. NOAA radar estimated hail of 1.00 inches or more over about 66 square miles within 5 miles of the reports. 15 qualifying reports measured 1.00 inches or larger, including 2 at 1.75 inches or larger.
How big was the hail in O'fallon / Gray Summit / Pacific corridor?
The largest hail reported in O'fallon / Gray Summit / Pacific corridor on April 27, 2026 measured 2 inches. HailPing grouped 15 reports of 1.00 inch or larger into this storm.
Which areas were affected by the April 27, 2026 hail storm in O'fallon, MO?
Reported hail reached O'fallon, Pacific, Gray Summit, Cedar Hill Lakes, Byrnes Mill, Ellisville, Saint Peters, Winfield, Dardenne Prairie, and Moscow Mills.
See what this storm means for your trade
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