Weather

How do meteorologists determine how fast the winds are in a tornado?

Tornadoes travel a very narrow path, hardly ever tracking directly over a weather station that can measure wind speeds. Furthermore, many wind instruments couldn't survive the intense winds in the core of a tornado.

So meteorologists wait until after the tornado passes, and then send out a storm survey team to analyze the damage the tornado caused. Through a survey of the damage to homes, trees, cars, and property, meteorologists will then estimate how fast the winds likely were using the Enhanced Fujita Scale, which ranks tornadoes on a scale from 0 to 5 based on intensity.

An EF-0 tornado can have winds from 65 to 85 miles-per-hour, while an EF-5 tornado can have winds over 200 miles-per-hour.


Interactive Radars

Regional Headlines

This Week's Circulars

STORMCENTER UPDATE

Regional Radar Image

Live Traffic Cameras

Cameras provided by PennDOT

Historical Averages

High Low
Current 56°F 42°F
Average 49°F 31°F
Record 73°F November 21, 1931 17°F November 21, 1951