Get ready for dangerous heat on the way for the remainder of this week. An Excessive Heat Warning will go into effect at 2pm today and is set to stay in effect through 9pm Saturday for the valley, foothills, and Plumas County. A Heat Advisory is set to be in effect from 11am Thursday through 11pm Friday in Trinity County. The low pressure that was centered to our north yesterday kept our high temperatures in check on Tuesday afternoon, but that is now moving further to our northeast. High pressure centered in the four corners region will build west across northern California today, and will result in hotter temperatures and very dry conditions. We'll also have gusty north winds at periods of today and Thursday. The hotter temperatures, very dry conditions, and stronger north winds will result in high fire danger returning to our entire region. We have clear conditions over northern California for the start of your Wednesday, but some thin clouds will track north into our region this afternoon and evening. We'll be sunny to mostly sunny through the day today in most areas. Temperatures are starting out very warm this morning. Valley areas are ranging from the upper 50's to lower 70's to start your Wednesday, while foothill areas are in the 50's to 60's, and our mountain zones are ranging from the upper 30's to lower 50's. Valley areas will have wind out of the northwest to 15mph, with gusts up to 25mph. Wind will not be quite as strong in our foothills and mountains, and will also be out of variable directions. Most of us will end up with north wind this afternoon. High temperatures are projected to climb into the 101 to 107 degree range in the valley today, while we end up in the mid 80's to mid 90's in our foothill and mountain areas. Heat risk will be elevated today, and will get even higher as our temperatures continue to climb late week.
Thursday and Friday are projected to be the hottest days of your extended forecast, with valley areas ranging from around 106 to 113 degrees both days. We'll end up in the 90's to triple digits in the foothills and mountains late this week. This is the result of that strong ridge of high pressure parked off to our east, with no cooler system moving through to keep our high temperatures in check. Overnight low temperatures will range from the 60's to potentially lower 80's in the valley and foothills, while mountain areas stay in the 40's to 50's late this week. So, there will not be much in the way of relief from the heat overnight. We'll continue to have breezy north wind on Thursday, but it will not be as strong as Wednesday. This will result in fire danger staying elevated. Modest south wind will return on Friday, but will only leave us with fire danger slightly lower than Wednesday and Thursday.
High pressure will stay strong across the southwest through this weekend, and our temperatures will continue to be very hot. Valley areas will start out in the 70's, and end up in the 102 to 109 degree range through this weekend. Foothill areas will start out in the 50's to 60's, and mountain areas will start out in the 50's both days this weekend. High temperatures in the foothills and mountains will end up in the 90's to lower triple digits on Saturday, and will then top out in the 80's to 90's for Father's Day on Sunday. Low pressure tracking towards the West Coast from the Pacific will finally start to break down the high pressure hold over northern California on Monday, but temperatures will still be well above average. Upper 90's to lower triple digits are expected in the valley on Monday, while we end up in the 80's to 90's in the mountains and foothills. The latest projections have valley areas dipping back into the mid 90's on Tuesday, while mountain and foothill areas end up in the 70's to 80's. Please be extremely cautious with the dangerous heat on the way. Dress for the hotter temperatures, stay hydrated, avoid outdoor activities during the peak heat of the day in the afternoons, and keep a close eye on loved ones.