Allegheny County, Pennsylvania Hail Map & History
Allegheny County was hit as recently as 2026-09-03, 11 days ago. Allegheny County is hit in most years, and usually several times over. The largest stone on record here is 2 inches, a hen egg and twice the National Weather Service's 1 inch severe criterion, reported on 2024-05-25 near Imperial.
Colored swath = NOAA MRMS radar-estimated hail size; dots = NOAA SPC reports in Pennsylvania. Radar-indicated, not a guarantee of damage.
The last hail here fell on 2026-09-03, around Braddock. A free SwathIQ account -- hand-reviewed, invite within 24-48h -- pulls Allegheny County addresses inside a hail swath above your size threshold into a door-knock list you can export, scoped to your approved markets.
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See call-center options ->How often it hails in Allegheny County
NOAA's Storm Prediction Center has logged 41 separate hail days here since 2010 -- 2.4 a year over 17 years of record. Those days carry 183 separate reports between them, better than three on a typical one. Exactly one year since 2010 passed with no reported hail day at all. The busiest single year was 2013, with 6 hail days. The last five years track the long-run rate, with 11 days since 2022.
4 of the 41 days reached 2 inches or more -- 10%, or about one hail day in 10, the last on 2024-05-25. Those big days do not follow the county's usual calendar: most of them fall in May, not June. Golf-ball size is rarer still: 1.75 inches or more on 8 of the 41 days.
Across the whole of Pennsylvania, see the Pennsylvania hail map and history.
Hardest-hit places in Allegheny County
Reports cluster nearest Imperial -- 6 of the county's 41 hail days -- then Robinson Township (5), Ross Township (5), Bridgeville (4) and McKeesport (3). Beyond those, NOAA names North Versailles, Valencia, Gibsonia, Green Tree, Imperial-Enlow, Pittsburgh, Sygan, West View and Avalon on more than one hail day apiece.
| Place | Hail days since 2010 | Largest stone |
|---|---|---|
| Imperial | 6 | 2.00″ |
| Ross Township | 5 | 1.00″ |
| Robinson Township | 4 | 1.75″ |
| McKeesport | 3 | 2.00″ |
| North Versailles | 3 | 1.75″ |
When it hails in Allegheny County
The season runs April through August: 35 of the 41 hail days on record fall in those 5 months (85%). June is the single busiest month, with 10 of them (24%). That peak sits inside the window rather than at either end. Hail has also been reported in March and September, outside that window. Reports span 7 of the 12 calendar months; the other 5 have never produced one.
| Month | Hail days |
|---|---|
| March | 4 |
| April | 6 |
| May | 5 |
| June | 10 |
| July | 7 |
| August | 7 |
| September | 2 |
Recent Allegheny County hail days
That day put 1 report on the map, the biggest 1.5 inches near Braddock. 1 hail day has already been reported this year.
| Date | Max hail | Reports |
|---|---|---|
| 2026-09-03 | 1.50″ | 1 |
| 2025-07-16 | 1.25″ | 2 |
| 2025-04-02 | 1.75″ | 23 |
| 2025-03-16 | 1.25″ | 5 |
| 2024-08-29 | 1.00″ | 1 |
| 2024-08-06 | 1.00″ | 2 |
| 2024-05-25 | 2.00″ | 15 |
| 2024-04-14 | 1.00″ | 3 |
How to read the Allegheny County map
The colored swath is NOAA's MRMS radar estimate of the largest hail per ~1 km cell; the dots are SPC ground reports. Yellow is about an inch, red 1.5 to 2″, purple 2″ and up (hail size vs roof damage). On this county's worst day the reports reached 2 inches, which is the purple band. Look up a street address with the hail history by address tool.
Nearby counties
The nearest counties with a page of their own: Washington County (23 hail days), Westmoreland County (37) and Beaver County (20). Allegheny County takes more hail than any of them.
Washington County · Westmoreland County · Beaver County
Back to the Pennsylvania hail map or the U.S. hail map.
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Data & method: NOAA/NWS Storm Prediction Center reports + NOAA MRMS MESH radar, Allegheny County, Pennsylvania only. Radar-indicated and observation-based -- informational only, not a guarantee of damage or a valid claim.