...BREEZY WINDS AND LOW RELATIVE HUMIDITY THROUGH SATURDAY EVENING... .Breezy diurnally driven westerly winds coupled with low relative humidity is expected to continue through the Lower Columbia Basin of Oregon each afternoon and evening through Saturday. Relative humidity will be above critical thresholds overnight. * AFFECTED AREA...Fire Weather Zone 691 Lower Columbia Basin of Oregon. * TIMING...Until 10 PM PDT this evening. * WINDS...West 10 to 20 mph with gusts up to 30 mph. * RELATIVE HUMIDITY...As low as 15 percent. * IMPACTS...Any fire that develops will catch and spread quickly. Outdoor burning is not recommended.