High Wind Warning

* WHAT...South winds 25 to 40 mph with gusts up to 70 mph expected.

* WHERE...Most of the Shasta Valley in central Siskiyou County. This includes portions of Interstate 5 as well as the communities of Weed, Gazelle, Grenada and Montague.

* WHEN...Until 1 PM PST this afternoon.

* IMPACTS...Damaging winds will blow down trees and power lines. Widespread power outages are expected. Travel will be difficult, especially for high profile vehicles.

* ADDITIONAL DETAILS...Highways running west to east will be exposed to tough driving conditions given the strong southerly wind speeds.