May 11 marks a solemn double milestone in Texas weather history: the state’s deadliest tornado — and its strongest.

the University of Chicago professor who developed the tornado intensity scale, gave it one of only two experimental F6 ratings ever considered. His analysis of the Lubbock storm became ...

A tornado outbreak may target the Upper Midwest, with the greatest risk of strong and possible long-track tornadoes in parts of Iowa, Minnesota and Wisconsin. The Storm Prediction Center has ...

The National Weather Service is warning of still more days of dangerous weather conditions across the central U.S. The agency ...

Tree damage is likely," the weather service said. The worst of the storm moved eastward across northern Wisconsin, prompting tornado warnings in various counties through 10:45 p.m. According to ...

The storm touched down near Lorena ... of Chicago professor who developed the tornado intensity scale — gave it one of only two experimental F6 ratings ever considered. The designation was ...