Rainfall Totals Raised as Coastal Storm Pushes Farther West

Rainfall Totals Raised as Coastal Storm Pushes Farther West
We have adjusted our rainfall forecast map based on the prevalent western trend with today’s coastal low pressure. Higher amounts of 4-6″ of rain are now likely back into Central PA, and remain likely in Eastern PA. Keep in mind not all of this will fall today, but a solid 2-3″ and locally 4″ will.
Flash Flood Watches have been posted for the Delaware Valley and the Lower Susquehanna Valley, in effect until late tonight:
Sunday Morning will be mainly dry before showers start to work their way into Southern PA. Monday to Thursday will be rain-filled, however there will be breaks in the rain. We are still holding out hope that next weekend will be mainly dry.

UPDATED RAINFALL FORECAST MAP

Area Red: Total rainfall amounts of 4-6″ are expected. Prepare for basement flooding and avoid flooded roadways.

Area Orange: Total rainfall amounts of 3-4″ are expected. Prepare for basement flooding and avoid flooded roadways.

Area Yellow: Total rainfall amounts of 2-3″ are expected. Isolated flash flooding possible.

Area Green: Total rainfall amounts of 1-2″ are expected.

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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