Some positive news and some big concerns are on the way in your Tuesday forecast. Low pressure off the coast of California is providing a modest cooling trend to our region today, but it is also bringing the threat of showers and thunderstorms to our higher elevations this afternoon. The showers are welcome, but the threat of thunderstorms means elevated fire danger is in store for some areas. A Red Flag Warning for high fire danger is set to stay in effect in Siskiyou and Modoc Counties through midnight tonight. That is where the best chance for thunderstorms will be, and thunderstorms could be accompanied by strong winds. We have clear conditions overhead in the valley this morning, but some thin clouds are continuing to blanket our higher elevations. I'm also continuing to track some very light showers in the northern Sierra and southern Cascades to start the day. Those showers will wrap up early this morning, and we'll end up mostly sunny in the Sierra for the remainder of your Tuesday. Temperatures are starting out in the 60's to low 70's in the valley, and 50's to 60's in the foothills and mountains. Winds will be out of the south to 15mph for most of us through the day, and humidity is expected to dip into the 11 to 25 percent range this afternoon. The south winds will help to usher in the Delta Breeze, and leave us with slightly cooler high temperatures today. High temperatures are projected to top out in the low to mid 90's in the valley, and in the upper 70's to low 90's in the foothills and mountains this afternoon. Fire danger will stay in the high range due to the dry conditions over dry fuels in the valley. Areas closest to the Oregon border will have fire danger in the high to extreme range today.
Similar conditions are on the way in your Wednesday forecast, but the threat of thunderstorms will not be as prevelant. Low pressure starts to move away from the coast on Thursday, and high pressure will be building back into our region. This will leave us with dry conditions and a substantial warming trend on the way in our forecast. High pressure to our east and to our northwest will dominate our forecast late this week through the weekend. Valley areas will end up in the 90's to triple digits on Thursday, mostly in the lower triple digits on Friday, and will then end up in the 105 to 114 degree range from Saturday through early next week. Sunday looks to be the hottest day of your extended forecast, with valley areas projected to end up in the 108 to 114 degree range. Foothill and mountain areas will end up back in the 80's to mid 90's late this week, and then climb into the 90's to triple digits from Saturday through early next week. Make sure you're taking advantage of the closer to average temperatures while they last, and plan around the dangerous heat returning this weekend. Schedule outdoor activities early in the day and try to stay indoors during the peak heat of the day in the afternoon. Also make sure to stay hydrated, and keep a close eye on children, the elderly, and your pets as they're especially suseptable to the heat.