Lingering moisture and instability is bringing favorable conditions for thunderstorm development this evening. Showers and storms have been developing across Siskiyou County and the Klamath Basin. The most instability is present on the East Side. As the sun begins to set, expect most of this activity to begin dying down. Clouds will linger through the overnight hours in these areas, while the Valley will see mostly clear conditions and the Coast the marine push after midnight.
By Tuesday, the thunderstorm threat has diminished and mostly sunny conditions will return to the region. Smoke will begin spreading inland at this point, so most of the viewing area will see worsening air quality through the course of the week with the heaviest smoke near and south of the fires.
Last week’s upper level disturbance will combine with another closed low located to our north and west. Later in the week, this system will then move further south and bring another chance for thunderstorms to Siskiyou County and the East Side. As of now, this threat will just be on Friday.