A deep trough of low pressure will whip up the wind and fire danger Friday and usher in much cooler weather for the weekend. Freezing temperatures are possible in the Sierra, with valleys dropping ...

A potent low-pressure system rolling up from Wyoming is expected to bring heavy rainfall and strong winds to parts of ...

Friday is officially the first day of summer (June 20), but it will be feeling much more like spring this weekend!

A deep trough associated with a colder-than-normal air mass across the West and a ridge associated with a warmer-than-normal air mass across the Southeast will lead to a very strong and persistent ...

But now, the pattern has shifted dramatically. This change is driven by the jet stream, which currently shows a deep trough plunging southward over the eastern U.S., bringing plenty of cold air ...