SwathIQ / Hail map / Pennsylvania

Pennsylvania Hail Map & History

Pennsylvania's metros from Pittsburgh to Philadelphia see summer hail from frontal and terrain-driven convection. Pick a date below to see the NOAA radar swath and reports, or check a specific address.

325

hail days since 2010

days with 2″+ hail

hail days this year

4.00″

largest stone on record

Pennsylvania storm date

Colored swath = NOAA MRMS radar-estimated hail size; dots = NOAA SPC reports in Pennsylvania. Radar-indicated, not a guarantee of damage.

Working Pennsylvania? Turn a storm into a route.

A free SwathIQ account -- hand-reviewed, invite within 24-48h -- pulls Pennsylvania 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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Hail history in Pennsylvania

Since 2010, NOAA's Storm Prediction Center has logged 325 separate hail days in Pennsylvania, including 30 days with hail 2″ or larger -- the size that routinely totals roofs. The largest stone on record here: 4.00″ on 2019-05-28 near 1 W ASHERTON, NORTHUMBERLAND. The most recent reported hail day was 2026-06-14. Major metros watched here: Philadelphia, Pittsburgh, Harrisburg, Allentown.

Top Pennsylvania counties by hail frequency

County	Hail days since 2010	Largest stone
ALLEGHENY	31	2.00″
WESTMORELAND	30	2.00″
LANCASTER	24	1.75″
MERCER	23	2.75″
YORK	23	2.00″
CRAWFORD	22	4.00″

Recent Pennsylvania hail days

Date	Max hail	Reports
2026-06-14	1.25″	3
2026-06-06	1.00″	1
2026-05-20	1.00″	1
2026-05-13	1.00″	7
2026-04-15	1.75″	14
2026-04-14	1.25″	1
2026-03-26	1.00″	1
2026-03-22	1.75″	23

How to read the Pennsylvania map

The colored swath is NOAA's MRMS radar estimate of the largest hail in each ~1 km cell; the dots are individual SPC ground reports. Yellow is around an inch, red is 1.5 to 2″, and purple is 2″ and up -- see how hail size maps to roof damage. Click any spot on the map to see the hail history at that point, or look up a full street address on the hail history by address tool. Today's nationwide activity is on today's hail report.

Nearby states

Michigan · New York · West Virginia · Texas · Kansas · Nebraska

FAQ

How often does it hail in Pennsylvania?

NOAA has logged 325 hail days in Pennsylvania since 2010, including 30 days with 2″+ hail.

Is the Pennsylvania hail map free?

Yes, no login. A free account adds door-knock address lists and CRM exports.

How far back does the data go?

NOAA SPC storm reports since 2010, with high-resolution MRMS radar swaths for recent storms.

Data & method: NOAA/NWS Storm Prediction Center reports + NOAA MRMS MESH radar, Pennsylvania only. Radar-indicated and observation-based -- informational only, not a guarantee of damage or a valid claim.