The National Weather Service has put a Flash Flood Watch in effect from Thursday morning to Thursday evening, Sept. 7, in northern California and southern Oregon.

NWS is predicting that thunderstorms in Siskiyou County and southern Oregon will contain high amounts of moisture that could produce flash flooding on burn scars.

Area included in the watch are South Central Siskiyou County and Western Siskiyou County. In Oregon, Central Douglas County, Curry County Coast, Eastern Curry County and Josephine County, Eastern Douglas County Foothills, Jackson County, Siskiyou Mountains and Southern Oregon Cascades, and South Central Oregon Cascades.

An unusually moist air mass over the region will combine with thunderstorms to produce the threat of heavy rainfall, according to NWS. “If these heavy rains fall on burn scar areas, dangerous runoff could result.

“Flash flooding, debris flows, and/or mudslides may occur in and down drainage from recent wildfire burn scars.”

People, structures and roads located below steep slopes, in canyons and near the mouths of canyons may be at serious risk from rapidly moving landslides.

A Dense Smoke Advisory has also been issued for mid-elevations and valleys of eastern Siskiyou County and northwest Modoc County; and an Air Quality Alert is in effect through noon on Friday that includes the cities of Mount Shasta, Dunsmuir, McCloud, Tennant, Tulelake, Dorris, Alturas, Canby, Likely, Altamont, Klamath Falls, Beatty, Bly, Chemult, Crescent, Gilchrist, Sprague River, Adel, Lakeview, and Valley Falls.

For more air quality information go to: www.co.siskiyou.ca.us/content/agriculture-air-pollution-control-district