Hail history in Allentown, PA
On average, NOAA recorded hail within 15 miles of the center of Allentown on 1.8 days a year from 2016 to 2025, 1.1 of them with hail 1 inch or larger. NOAA recorded hail within 15 miles of the center of Allentown on 43 days since 2010. The largest hail reported was 2.5 in, in 2010. 24 of those days had hail of 1 inch or larger. May has the most hail days, 11 since 2010. The most recent was July 3, 2025. NOAA also recorded high wind on 151 days, with gusts up to 81 mph.
Ranks #99 of 200 US cities for days with hail 1 inch or larger, 2016 to 2025.
- Hail days since 2010
- 43
- Largest hail
- 2.5 in
- Highest gust
- 81 mph
Source: NOAA/NWS Storm Prediction Center
Data through November 1, 2026
43 hail days within 15 miles since 2010, largest 2.5 in
Source: NOAA/NWS Storm Prediction Center
Data through November 1, 2026
Hail days by year
Bar chart of hail days per year, 2010 to 2026. 43 hail days in total; the most was 6 in 2014.
Hail days by month
Hail days by month since 2010: Jan 0, Feb 1, Mar 0, Apr 3, May 11, Jun 7, Jul 10, Aug 7, Sep 4, Oct 0, Nov 0, Dec 0.
Most recent hail days
| Date | Largest hail | Nearest report |
|---|---|---|
| Jul 3, 2025 | 1.0 in | 7.7 mi |
| May 6, 2025 | 1.0 in | 4.6 mi |
| Jun 26, 2024 | 0.75 in | 2.5 mi |
| Apr 30, 2024 | 1.25 in | 1.9 mi |
| Sep 7, 2023 | 1.0 in | 13.3 mi |
| Aug 15, 2023 | 1.0 in | 4.7 mi |
| Apr 15, 2023 | 0.88 in | 5.7 mi |
| Aug 22, 2022 | 1.0 in | 4.6 mi |
| Jul 21, 2021 | 0.75 in | 2.5 mi |
| Jul 8, 2021 | 1.0 in | 7.9 mi |
About this data
- Distances are from the center of Allentown, not from any one property. Look up a street address below for a single building.
- Reports come from trained spotters and the public, so they cluster near towns and roads.
- No report does not mean no hail. Hail can fall where no one is there to report it.
- This is not a damage or insurance assessment.
151 high-wind days within 15 miles since 2010, strongest gust 81 mph
Source: NOAA/NWS Storm Prediction Center
Data through November 1, 2026
Most recent high-wind days
| Date | Highest gust | Nearest report |
|---|---|---|
| Oct 16, 2026 | Not recorded | 3.7 mi |
| Sep 3, 2026 | Not recorded | 5.4 mi |
| Sep 1, 2026 | Not recorded | 12.3 mi |
| Aug 10, 2026 | Not recorded | 13.0 mi |
| Aug 7, 2026 | Not recorded | 0.6 mi |
| Jul 28, 2026 | Not recorded | 13.3 mi |
| Jul 4, 2026 | Not recorded | 8.3 mi |
| Jul 3, 2026 | 59 mph | 4.4 mi |
| Jul 1, 2026 | Not recorded | 11.6 mi |
| Jun 11, 2026 | Not recorded | 1.0 mi |
About this data
- Distances are from the center of Allentown, not from any one property. Look up a street address below for a single building.
- Reports come from trained spotters and the public, so they cluster near towns and roads.
- No report does not mean no hail. Hail can fall where no one is there to report it.
- Wind speed is the highest reported gust; some reports have no speed.
- This is not a damage or insurance assessment.
Gusts, tornadoes and hurricanes in Allentown
Estimated peak gusts
No day since October 1, 2021 had an estimated peak gust of 58 mph or more at Allentown.
Estimates: the highest gust of each storm day in NOAA’s hourly 2.5 km wind analysis (URMA), which fills in between weather stations. Analyses like this smooth out short thunderstorm gusts, so they are best for widespread wind (hurricanes, winter storms, high wind days); for thunderstorm wind, NOAA’s wind reports are the better record. Not a measurement at any building.
Tornadoes within 10 miles
NOAA recorded 15 tornadoes whose path came within 10 miles of Allentown since 1950; the strongest was rated EF2.
| Day | Rating | Path length | Closest |
|---|---|---|---|
| Aug 7, 2023 | EF1 | 0.3 miles | 3.8 miles |
| Sep 6, 2008 | EF1 | 0.56 miles | 2.7 miles |
| May 29, 1995 | EF1 | 0.5 miles | 10 miles |
| Jul 15, 1992 | EF0 | 0.2 miles | 6.2 miles |
| Jul 14, 1985 | EF0 | 0.8 miles | 7.4 miles |
| Jul 5, 1984 | EF2 | 5 miles | 8.3 miles |
| Jul 5, 1984 | EF2 | 8 miles | 5.8 miles |
| Aug 11, 1983 | EF1 | 2 miles | 5.7 miles |
Show all 15Show fewer
| Day | Rating | Path length | Closest |
|---|---|---|---|
| Aug 11, 1983 | EF1 | 11 miles | 6.4 miles |
| Apr 3, 1982 | EF1 | 0.2 miles | 1.2 miles |
| Mar 21, 1976 | EF1 | 4.6 miles | 2.5 miles |
| Jun 28, 1973 | EF1 | 0.1 miles | 9.4 miles |
| May 28, 1973 | EF1 | 1.9 miles | 9.1 miles |
| Aug 7, 1957 | EF0 | 0.3 miles | 1.8 miles |
| Jul 5, 1950 | EF2 | 12.9 miles | 3.4 miles |
Source: NOAA/NWS Storm Prediction Center. Ratings before 2007 are on the original Fujita scale.
Hurricanes and tropical storms
10 storms in NOAA's records brought modeled tropical-storm-force winds (39 mph or more) to Allentown.
| Storm | Modeled peak gust | Sustained | Closest pass |
|---|---|---|---|
| Isaias (2020) | 60 mph | 49 mph | 11 miles |
| Sandy (2012) | 63 mph | 51 mph | 57 miles |
| Irene (2011) | 49 mph | 40 mph | 75 miles |
| Hazel (1954) | 64 mph | 52 mph | 95 miles |
| Unnamed storm, 1949 | 56 mph | 45 mph | 51 miles |
| 1938 New England hurricane | 54 mph | 44 mph | 135 miles |
| Unnamed storm, 1929 | 54 mph | 44 mph | 23 miles |
| Unnamed storm, 1903 | 59 mph | 48 mph | 14 miles |
| 1893 Sea Islands hurricane | 49 mph | 40 mph | 3 miles |
| Unnamed storm, 1878 | 85 mph | 69 mph | 26 miles |
Modeled from NOAA’s best tracks for open, flat ground; not measurements. How we model hurricane winds
31 radar hail days within 15 miles since 2020, largest 1.75 in or more
Source: NOAA MRMS radar (MESH), from October 14, 2020. Estimates of the largest hail in each 1 km cell, not measurements.
14 days with radar hail 1 inch or larger, 0 at 2 inches or larger, within 15 miles of Allentown’s center.
Biggest radar hail days
- 0.75 in+
- 1.0 in+
- 1.5 in+
- 2.0 in+
- 2.5 in+
- 3.0 in+
Most recent radar hail days
| Date | Largest radar estimate |
|---|---|
| Sep 3, 2026 | 0.75 in or more |
| Sep 1, 2026 | 1.25 in or more |
| Aug 27, 2026 | 0.75 in or more |
| Aug 7, 2026 | 0.75 in or more |
| Jul 28, 2026 | 1.0 in or more |
| Jul 27, 2026 | 0.75 in or more |
Storms in Allentown
A National Weather Service State College study of 50 years of Pennsylvania storm data found that severe weather reports rise quickly in June and peak in July, with a minor second peak in November.1
Notable storms
- August 7, 2023On the evening of August 7, 2023, an EF1 tornado with peak winds estimated at 100 mph crossed the Midway Manor neighborhood of east Allentown into Bethlehem. Near its widest point, about 160 yards, multiple homes lost 30 to 50 percent of their roof covering, and a shed was thrown about 50 feet. No one was hurt.2,3
- June 30, 2015A microburst with winds estimated at 81 mph struck Whitehall Township, where downed trees damaged 29 homes and buildings and a township state of emergency was declared. NOAA's storm records list $500,000 in property damage there.4
- October 29, 2012On October 29, 2012, post-tropical storm Sandy produced an 81 mph gust in Allentown, the highest measured in NWS Mount Holly's Pennsylvania area, and a 70 mph gust at Lehigh Valley International Airport. In Lehigh County, 13 homes had major damage, and NOAA lists $3 million in property damage there.5
- May 14, 2010A supercell dropped 2.5-inch hail in New Tripoli and in Upper Macungie Township, where it caused damage at a car dealership. Hail of 1 to 1.75 inches fell from Schnecksville into Allentown.6,7,8
- September 6, 2008On September 6, 2008, Tropical Storm Hanna produced an EF1 tornado with gusts near 95 mph in East Allentown. It damaged about 50 homes and about 100 trees, and NOAA lists $1.5 million in property damage.9,10
- May 13, 2000A 69 mph gust was measured at Lehigh Valley International Airport, and gusts estimated at 100 mph hit southern Northampton County, including Bethlehem and Easton.11,12
Warnings and alerts
The City of Allentown sends emergency and weather alerts through Allentown CodeRED, which takes sign-ups by texting ALLENTOWNALERT to 99411, while Lehigh County runs its own CodeRED alerts for addresses outside the city.13
Sources
- 1. American Meteorological Society, 21st Conference on Severe Local Storms: The Climatology and Character of Pennsylvania Severe Weather
- 2. NOAA NCEI Storm Events Database: Tornado, Lehigh County, August 7, 2023
- 3. WFMZ-TV 69 News: NWS: Tornado that touched down in Allentown was EF1, had estimated peak wind of 100 mph
- 4. NOAA NCEI Storm Events Database: Thunderstorm Wind, Lehigh County, June 30, 2015
- 5. NOAA NCEI Storm Events Database: High Wind, Lehigh County, October 29, 2012
- 6. NOAA NCEI Storm Events Database: Hail, Lehigh County, May 14, 2010
- 7. NOAA NCEI Storm Events Database: Hail, New Tripoli, May 14, 2010
- 8. NOAA NCEI Storm Events Database: Hail, Schnecksville, May 14, 2010
- 9. NOAA NCEI Storm Events Database: Tornado, Lehigh County, September 6, 2008
- 10. NWS Philadelphia/Mount Holly: Storm Summary for September 6, 2008 event
- 11. NOAA NCEI Storm Events Database: Thunderstorm Wind, Northampton County, May 13, 2000
- 12. NOAA NCEI Storm Events Database: Thunderstorm Wind, Lehigh County, May 13, 2000
- 13. City of Allentown: Emergency Management Agency (EMA)
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Questions about hail in Allentown
Source: NOAA/NWS Storm Prediction Center
Data through November 1, 2026
- How often does it hail in Allentown?
- NOAA recorded hail within 15 miles of the center of Allentown on 1.8 days a year on average from 2016 to 2025, 1.1 of them with hail 1 inch or larger. Since 2010 it recorded 43 hail days.
- When is hail season in Allentown?
- May has the most hail days within 15 miles of the center of Allentown, 11 since 2010, then July (10) and June (7).
- What is the largest hail recorded in Allentown?
- 2.5 in, in 2010: the largest hail NOAA recorded within 15 miles of the center of Allentown since 2010.
- When did it last hail in Allentown?
- NOAA's most recent hail report within 15 miles of the center of Allentown is from July 3, 2025, with hail up to 1.0 in reported 7.7 miles from the center. Data through November 1, 2026.