Daily Forecast for Tuesday, August 21st, 2018

Daily Forecast for Tuesday, August 21st, 2018

Scattered showers are likely this morning and into the early afternoon hours as a warm front passes through the region with temperatures in the 70s and 80s.

Below is a look at the future radar for 2:00 PM this afternoon: 

The severe weather will arrive later this evening and into the nighttime hours as a trailing cold front sweeps into the area. Western Pennsylvania and parts of Central Pennsylvania continue to have the best chance to experience the severe weather this time around. It is anticipated the line of storms will weaken as it progresses into Eastern Pennsylvania. Below is a look at 9:00 PM tonight: 

If our future radar is even close to verifying, that is a very potent line of storms capable of producing damaging winds in excess of 60 mph, large hail, and the potential for an isolated tornado or two. We will have all the latest watches and warnings posted on our Facebook page. Have a great Tuesday!

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