Lightning Map — Pennsylvania

Track real-time lightning strikes and thunderstorm activity across Pennsylvania. With an average of 32 thunderstorm days per year, Pennsylvania is a state with notable seasonal storm activity.

32
Avg Storm Days/Year
7
Cities Tracked
13.0M
Population

Data sourced from NOAA GOES-19 Geostationary Lightning Mapper (GLM) and the Storm Prediction Center (SPC).

About Lightning in Pennsylvania

Pennsylvania averages 32 thunderstorm days per year, placing it above the national average of 25 days. Located at approximately 40°N latitude, Pennsylvania is bisected by the Appalachian Mountains, where western Pennsylvania sees Great Lakes-influenced storms while eastern regions experience Atlantic moisture-driven convection.

In Pennsylvania, maritime air masses interact with continental weather patterns during warm months. Peak thunderstorm activity occurs during May through August, when conditions align for the most frequent lightning strikes. With a population of 13.0 million residents, storm awareness and lightning safety are important considerations for anyone living in or visiting Pennsylvania.

#31
out of 50 states
32
storm days/year
7 more than the US average

When Thunderstorms Peak in Pennsylvania

Thunderstorm season in Pennsylvania runs from May through August. Storms are typically driven by frontal systems and can develop rapidly during warm, humid afternoons. While the season is more compressed than in southern states, individual storms can be intense with frequent cloud-to-ground lightning.

Peak Season
May through August

Top Cities in Pennsylvania

Monitor lightning activity in these Pennsylvania cities

Philadelphia

PA
32 storm days/yr

Pittsburgh

PA
35 storm days/yr

Allentown

PA
30 storm days/yr

Erie

PA
33 storm days/yr

Reading

PA
31 storm days/yr

Scranton

PA
30 storm days/yr

Lancaster

PA
30 storm days/yr

Lightning Safety in Pennsylvania

Stay safe during the 32 thunderstorm days Pennsylvania averages each year

Follow the 30-30 Rule

If the time between seeing lightning and hearing thunder is 30 seconds or less, seek shelter. Stay indoors for 30 minutes after the last thunderclap.

Stay Indoors During Storms

With 32 thunderstorm days annually in Pennsylvania, having a plan for when storms strike is essential. Avoid windows and stay away from plumbing.

Monitor Lightning Activity

Use Lightning Tracker to get real-time alerts when storms approach your area in Pennsylvania. Early awareness helps you make safer decisions.

Outdoor Safety

If caught outside, avoid open fields, hilltops, and isolated trees. Seek shelter in a substantial building or hard-topped vehicle.

Useful Guides for Pennsylvania

These pages help visitors who search for maps, nearby strikes, and alert setup

Near me How to check lightning near you in Pennsylvania

Use this guide when you want to know how fast nearby strikes can become a real safety problem in Pennsylvania.

 Map guide How to read a lightning map for Pennsylvania

Understand clusters, timing, and storm movement before using launch alerts in the app.

 Alerts Best ways to get lightning alerts in Pennsylvania

Compare app alerts, NOAA weather radio, and local warning workflows for storms in your area.
App links later

Track Lightning in Pennsylvania Right Now

The app links can be added after release. For now, use the Pennsylvania hub, city pages, and lightning guides to cover map and safety intent.

Launching Soon iOS & Android

App links go live at release. For now use the lightning maps and guides on this site.