Coastal Storm to Bring Significant Amounts of Rainfall Friday into Saturday

Coastal Storm to Bring Significant Amounts of Rainfall Friday into Saturday

After the past couple days of dry and mostly sunny weather, we have our eyes turned to the weekend as a low pressure system will track just south of Pennsylvania during the day Friday and will transfer its energy to the coast Friday night. This coastal low will enhance precipitation across the state overnight Friday into Saturday morning.

Below is our futurecast radar valid for 5:00 PM Friday and 8:00 PM Friday evening:

PREDICTED RAINFALL TOTALS FRIDAY PM THROUGH SATURDAY PM:

Timeline: Rainfall will begin from west to east beginning lunchtime Friday, lasting through the early morning hours of Saturday. It will be possible for rain to linger over our eastern counties into lunchtime Saturday.

 

Area A – 2 to 3 inches of rainfall is expected Friday afternoon through lunchtime Saturday. The potential does exist for localized locations to receive over 4 inches of rainfall. In these localized locations that do receive over a third of a foot of rain, major flash flooding would be a concern.

Area B – 2 to 2.5 inches of rainfall is expected Friday afternoon through lunchtime Saturday. Localized locations may receive up to 3 inches of rainfall. Significant flash flooding is possible in these areas, especially in locations that experienced flash flooding just a few days ago.

Area C – 1 to 2 inches of rainfall is expected Friday afternoon through lunchtime Saturday. Localized locations may receive up to 2.5 inches of rainfall. Moderate flash flooding is possible, especially in flood prone areas.

Area D – 0.5 to 1 inch of rainfall is expected Friday afternoon through lunchtime Saturday. Localized locations may receive up to 2 inches of rainfall.

Area E – Less than a half inch of rainfall is expected Friday afternoon through lunchtime Saturday.

Make sure you have our Facebook page liked for the latest updates regarding this coastal storm and more. We will have another update Tomorrow evening>>>PA Weather Action on Facebook! You can also stay updated by downloading our app. Just search “PA Weather” in your phone’s app store.

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Josh Adams is the founder and lead forecaster of Pennsylvania Weather Action, a regional forecasting site he launched in 2015. With over a decade of experience analyzing weather patterns across Pennsylvania, his forecasts have reached millions of readers throughout the state. Josh specializes in Pennsylvania’s complex microclimates and terrain-driven weather patterns, providing detailed coverage of severe thunderstorms, winter storms, and flooding events. His forecasting focuses on delivering precise, timely information to help Pennsylvanians stay informed and prepared during impactful weather. Last Updated: March 10, 2026