What is a derecho?

A derecho is a widespread and long-lived windstorm that is associated with a fast-moving band of severe thunderstorms.

They can produce significant damage to property and pose a serious threat life, primarily by downburst winds.

To be classified as a derecho, the path length of the storm has to be at least 280 miles long, but the widths may vary from 50-300 miles.

Derechos are usually not associated with a cold front, but a stationary front.

They occur mostly in July, but can occur at anytime during the spring and summer.

Interactive Radars

Regional Headlines

This Week's Circulars

Regional Radar Image

Live Traffic Cameras

Cameras provided by PennDOT

Historical Averages

High Low
Current 73°F 52°F
Average 73°F 51°F
Record 95°F May 23, 1925 37°F May 23, 2002