* WHAT...South winds 25 to 35 mph with gusts up to 55 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...Gusty winds will blow around unsecured objects. Tree limbs could be blown down and driving may become difficult.
* ADDITIONAL DETAILS...Highways running west to east will be exposed to tough driving conditions given the strong southerly wind speeds.