Weather

What is plate tectonics?

The theory of plate tectonics is a interesting story of continents drifting from place to place breaking apart, colliding, and grinding against each other.

The plate tectonic theory is supported by a wide range of evidence that considers the earth's crust and upper mantle to be composed of several large, thin, relatively rigid plates that move relative to one another.

The plates are all moving in different directions and at different speeds.

Sometimes the plates crash together, pull apart or sideswipe each other.

When this happens, it commonly results in earthquakes and volcano eruptions.


Interactive Radars

Regional Headlines

This Week's Circulars

Regional Radar Image

Live Traffic Cameras

Cameras provided by PennDOT

Historical Averages

High Low
Current 66°F 43°F
Average 63°F 40°F
Record 89°F April 23, 1960 28°F April 23, 1936