Poor air quality, slightly above average temperatures, and elevated fire danger from the lingering threat of thunderstorms are all in store for your Tuesday forecast. The Fire Weather Watch set to go into effect this afternoon has now been upgraded to a Red Flag Warning in Modoc, Lassen, and Plumas Counties from noon through 9PM today. Afternoon thunderstorm activity will be possible along the Sierra Crest, the Southern Cascades, and the Northern Mountains. There will also be a very slight threat of thunderstorm activity in the valley this afternoon.
Smoke continues to blanket northern California for the start of your Tuesday and conditions will be smoky to hazy today. Air quality is starting out in the unhealthy to very unhealthy range this morning and will stay very impacted through the day. You're going to want to limit your time outdoors again today. Some scattered showers have continued to track north through higher elevations this morning and the threat of thunderstorms is expected to return to mountain areas this afternoon. There will also be a very slight threat of thunderstorms in the valley. Temperatures are starting out in the 60's to 70's in the valley and foothills, and in the 50's for most mountain areas early today. Winds are light and out of the northeast this morning, but will be out of the south to around 10mph this afternoon. High temperatures are projected to end up in the mid 90's in the valley this afternoon, and in the 80's to lower 90's in the foothills and mountains. Low humidity, dry fuels, and the threat of thunderstorms will result in fire danger in the high range this afternoon.
Smoke and haze will continue to impact our forecast for the duration of the fires burning in our region and temperatures will become slightly hotter late this week and weekend. Valley areas can expect high temperatures to climb back into the high 90's to low triple digits from Friday through the weekend, while mountain and foothill areas mostly top out in the upper 80's to mid 90's. There will be a chance for some mountain thunderstorms again on Wednesday and on Friday. Mostly dry weather without unsettled conditions are expected across our region through the end of your extended forecast. Models are currently split on whether or not we can expect a modest cooling trend from Sunday through early next week, but we should get a better idea of what to expect over the next few days. Our current forecast keeps high temperatures above average.
Please make sure to use extra caution with elevated fire danger continuing in our forecast, and limit your time outdoors while air quality remains impacted.