The National Weather Service in Portland has issued a Fire Weather Watch, which is in effect from this evening through Thursday afternoon. * AFFECTED AREA. In Oregon, Fire Weather Zone 688 Mt Hood National Forest Region, Fire Weather Zone 689 Northern Willamette National Forest, and Fire Weather Zone 690 Southern Willamette National Forest. In Washington, Fire Weather Zone 634 Southern Gifford Pinchot National Forest and Fire Weather Zone 635 Mt. Adams Ranger District of the Gifford-Pinchot National Forest. * WINDS. East 10 to 20 mph with gusts up to 35 mph. * RELATIVE HUMIDITY. 20 to 30 percent. * IMPACTS. Conditions may be favorable for rapid fire spread which may threaten life and property. Use extra caution with potential ignition sources, especially in grassy areas. Outdoor burning is not recommended.