The National Weather Service in Medford has upgraded the previously issued Fire Weather Watch to a Red Flag Warning.
UPDATE, 7:30 AM, 9/5/19
A Red Flag Warning remains in effect for much of Southern Oregon and parts of Northern California today.
Isolated thunderstorms are still expected through the majority of today. Storms will then become more scattered this afternoon and evening, especially east of the Cascades.
The thunderstorms today will mostly be wet, but lightning can occur outside of the rain core, so the risk of new fire starts will remain high.
The thunderstorms will end tonight and Friday will be warm and dry as high pressure briefly builds over the area. A cool and showery regime will develop Saturday as an upper trough moves to the coast, and this regime will persist into next week.
Original, 6:16 AM, 9/14/19
A Red Flag Warning is in effect from 5:00 AM to 11:00 PM Thursday, September 5, 2019, for abundant lightning on dry fuels for areas of Klamath, Lake, and Modoc Counties and Fire Weather Zones OR624, 625, 611, 640, 610 and CA285.
Isolated thunderstorms are expected during Wednesday night with little to no rainfall. Thunderstorms are then expected to become more frequent and increase in coverage during Thursday with the peak of thunderstorms late Thursday morning into Thursday evening.
There is also a better chance for wetting rain Thursday, but lightning can occur outside of the rain core of thunderstorms, so the risk of new fire starts is still high.
Abundant lightning on dry fuels may produce numerous new starts that pose a threat to life and property, and may overwhelm initial attack capabilities. Gusty winds near thunderstorms could contribute to fire spread. Despite rainfall, initial attack resources could be overwhelmed and holdover fires are possible.
In Fire Zone 285....The entire zone except for the southwest portion. In South Central OR Fire Zones... 624 and 625.
Thunderstorms will be isolated Wednesday night, but increase in coverage Thursday evening.