Hail history for Imperial, Pennsylvania
NOAA hail reports in and within about 5 km (3 miles) of Imperial since 1990, with preliminary reports to November 3, 2026.
Readout · Imperial
- Last hail
- May 25, 2024
- 1.75 in, golf ball size
- Hail days, last 5 years
- 1
- since Nov 3, 2021 · 6 reports
- Largest ever
- 2.00 in
- hen egg · May 25, 2024
26 reports on 16 days since 1990 · #8 of 108 Pennsylvania places
Hail map · Imperial
- Under 1 in
- 1–1.75 in
- 1.75–2.5 in
- 2.5–4 in
- 4 in +
- No size
For homeowners
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What the record says about Imperial
The latest hail report in and around Imperial is from May 25, 2024, 1.75 in (golf ball size). Since November 3, 2021 there has been one hail day; the biggest stones in that time were 2.00 in on May 25, 2024.
Over the 20 years 2006–2025, Imperial logged 20 reports on 10 hail days, about 1.0 reports a year. That is about twice the median Pennsylvania town on this site (0.5 a year) and ranks #8 of 108 Pennsylvania cities and towns on this site for all-time reports. Imperial accounts for 6% of the 446 reports filed in Allegheny County.
4% of reports with a size were 2 inches (hen egg) or larger, against 0% for the median Pennsylvania town on this site. The largest hail on record here is 2.00 in (hen egg) on May 25, 2024 near 0.53 E Imperial.
Reports were up 22% in 2016–2025 (11) compared with 2006–2015 (9). The busiest year was 2024, with 6 reports on 1 day. Hail here peaks in May (35% of reports); 65% fall between April and June.
Reports a year 2006–2025 average
- Imperial 1.0
- Allegheny County 15.1
- Median Pennsylvania town on this site 0.5
Hail days 2006–2025
- Imperial 10
- Allegheny County 76
- Median Pennsylvania town on this site 6
Share 2 in or larger of sized reports
- Imperial 4%
- Allegheny County 2%
- Median Pennsylvania town on this site 0%
Hail over time
| Year | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Total |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2026 | 0 | ||||||||||||
| 2025 | 0 | ||||||||||||
| 2024 | 6 | 6 | |||||||||||
| 2023 | 0 | ||||||||||||
| 2022 | 0 | ||||||||||||
| 2021 | 1 | 1 | 2 | ||||||||||
| 2020 | 0 | ||||||||||||
| 2019 | 0 | ||||||||||||
| 2018 | 0 | ||||||||||||
| 2017 | 0 |
Hail days since Nov 3, 2021
| Date | Reports | Largest | Storm page |
|---|---|---|---|
| May 25, 2024 | 6 | 2.00 in | — |
Largest hail on record
| Date | Size | Location | County | Time · source |
|---|---|---|---|---|
| May 25, 2024 | 2.00 inhen egg | 0.53 E Imperial | Allegheny | 16:32 local · NCEI |
| May 25, 2024 | 1.75 ingolf ball | 0.87 SW Cliff Mine | Allegheny | 16:41 local · NCEI |
| May 25, 2024 | 1.75 ingolf ball | 0.2 ENE Imperial | Allegheny | 16:34 local · NCEI |
| Jun 2, 2010 | 1.75 ingolf ball | 0.53 E Imperial | Allegheny | 18:10 local · NCEI |
| Jun 30, 1998 | 1.75 ingolf ball | Imperial | Allegheny | 13:58 local · NCEI |
Size of every report
- Under 1 in 7 27%
- 1–2 in 18 69%
- 2 in + 1 4%
Most recent reports
| Date | Size | Location | County | Time · source |
|---|---|---|---|---|
| May 25, 2024 | 1.75 ingolf ball | 0.87 SW Cliff Mine | Allegheny | 16:41 local · NCEI |
| May 25, 2024 | 1.50 inping pong ball | 1.21 ENE Cliff Mine | Allegheny | 16:35 local · NCEI |
| May 25, 2024 | 1.00 inquarter | 0.87 SW Cliff Mine | Allegheny | 16:34 local · NCEI |
| May 25, 2024 | 1.75 ingolf ball | 0.2 ENE Imperial | Allegheny | 16:34 local · NCEI |
| May 25, 2024 | 1.25 inhalf dollar | 0.69 N Imperial | Allegheny | 16:33 local · NCEI |
| May 25, 2024 | 2.00 inhen egg | 0.53 E Imperial | Allegheny | 16:32 local · NCEI |
| Aug 13, 2021 | 0.75 inpenny | 0.53 E Imperial | Allegheny | 18:03 local · NCEI |
| Jun 14, 2021 | 0.75 inpenny | 0.53 E Imperial | Allegheny | 14:20 local · NCEI |
| May 2, 2016 | 1.50 inping pong ball | 0.87 NW Cliff Mine | Allegheny | 03:02 local · NCEI |
| May 2, 2016 | 1.00 inquarter | 0.53 E Imperial | Allegheny | 03:01 local · NCEI |
| May 2, 2016 | 1.00 inquarter | 0.53 E Imperial | Allegheny | 03:00 local · NCEI |
| Aug 3, 2015 | 0.88 innickel | 0.53 E Imperial | Allegheny | 18:55 local · NCEI |
Hail history near Imperial
- Carnot-Moon 8 km · 25
- Aliquippa 18 km · 18
- Franklin Park 20 km · 18
- West View 20 km · 11
- Economy 22 km · 19
- Pittsburgh 23 km · 81
- Bethel Park 23 km · 14
- Industry 26 km · 15
Questions about hail in Imperial
How often does it hail in Imperial, Pennsylvania?
26 hail reports have been logged in and within about 5 km (3 miles) of Imperial since 1990. Over the 20 years 2006–2025 that averages 1.0 reports a year. That ranks #8 of 108 Pennsylvania places by number of reports.
When is hail season in Imperial?
Most reports come in May, June, July. May alone accounts for 35% of all reports.
What is the largest hail recorded in Imperial?
2.00 in (hen egg size) on May 25, 2024 near 0.53 E Imperial. 4% of reports here were 2 inches or larger.
When did it last hail in Imperial?
The most recent report in this data is from May 25, 2024 (1.75 in). Final NOAA data runs to July 31, 2026; preliminary NWS reports run to November 3, 2026.
How many hail storms has Imperial had in the last five years?
1 separate days with hail reports since November 3, 2021, adding up to 6 reports. The most recent was May 25, 2024.
Where does this hail data come from?
Hail reports come from the NOAA NCEI Storm Events Database, which the National Weather Service compiles from spotter, public, law enforcement and media reports. Recent days use preliminary NWS Local Storm Reports via the Iowa Environmental Mesonet until NOAA publishes final data. Only reported hail is counted, so areas with fewer people tend to have fewer reports.