A weather system could bring catastrophic flooding across four states, beginning on Wednesday amid rounds of heavy rainfall.

but also to depict the present weather at various locations on the weather map. Areas of precipitation help determine the frontal type and location.

Rivers start in mountains, join other streams as they flow downhill, then channel into an open ocean or lake. Right? Well, ...

The Current Temperature map shows the current temperatures color contoured every 5 degrees F. Temperature is a physical property of a system that underlies the common notions of hot and cold ...