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Storm Tracker Forecast: Poor air quality & dangerous heat ahead

Air quality will become more impacted over the next few days and temperatures will be on the rise. Dangerous heat is on the way for your Labor Day Weekend.

Posted: Sep 3, 2020 6:30 AM
Updated: Sep 3, 2020 8:23 AM

High pressure off to our east in the Desert Southwest and to our west in the Pacific will dominate our forecast today and through your Labor Day Weekend. This will result in a substantial rise in temperatures through this weekend, and more stagnant air across northern California. The lighter winds will allow more impacts to our air quality from wildfire smoke late this week and this weekend. We're already starting to see bigger impacts to air quality in areas surrounding active fires and that will likely become more widespread over the next few days. An Excessive Heat Watch has been issued by the National Weather Service out of Sacramento for the entire valley, foothills, a portion of the western slopes of the Sierra, and the Northern Mountains from Saturday morning through Tuesday afternoon.

Skies are mostly clear this morning, but smoke will continue to become more of an issue across our region today. Most of the valley is starting out with air quality in the moderate range this morning, while bigger impacts are being reported in Plumas and Lassen Counties. The worst air quality is in Plumas County, where air quality is starting out in the very unhealthy range this morning. Temperatures are starting out in the 60's to 70's in the valley and foothills this morning, and in the 50's to 60's in higher elevations. Winds are mostly light and out of the northeast this morning, but will increase to around 10mph out of the southeast this afternoon. Humidity will mostly end up in the 20 to 35 percent range later today. High temperatures are projected to end up several degrees warmer than yesterday. Valley areas will top out in the mid 90's to around 100 degrees, while foothill areas end up in the mid 80's to low 90's, Sierra locations end up in the high 80's to mid 90's, and the Northern Mountains top out in the mid 90's to low triple digits. Lighter winds and slightly higher humidity will help to limit fire danger today, but dry fuels are keeping us in the moderate to high range this afternoon.

Temperatures will end up a degree or two hotter on Friday and then the heat will ramp up as we head through your Labor Day Weekend. Valley areas can expect high temperatures in the 100 to 106 degree range on Saturday, and in the 103 to 112 degree range on Sunday. Foothill and mountain areas are currently projected to top out in the mid 90's to triple digits for both days this weekend. The latest projections have temperatures dropping by around 2 to 5 degrees on Labor Day compared to Sunday. This will still be around 10 degrees hotter than average for this time of year. Temperatures will drop by a couple more degrees on Tuesday and then by a couple more on Wednesday. High temperatures are expected to stay above average through your entire extended forecast. Heat related illness will be a major concern through this weekend and into early next week. The Excessive Heat Watch is set to be in effect from Saturday morning through 6PM Tuesday. Make sure to plan ahead for the hot conditions. Make plans to be inside somewhere with air conditioning for the afternoons on those days, drink plenty of water, and dress for the hotter temperatures on the way.

California Coronavirus Cases

Data is updated nightly.

Confirmed Cases: 893364

Reported Deaths: 17256
CountyConfirmedDeaths
Los Angeles2940656956
Riverside653861279
San Bernardino615501070
Orange578481434
San Diego53498866
Kern33630415
Fresno30328430
Sacramento24957480
Santa Clara23679385
Alameda23001456
San Joaquin21473488
Contra Costa18342240
Stanislaus17455395
Tulare17365282
Ventura14050160
Imperial12668336
San Francisco12000138
Monterey1122586
San Mateo10961157
Santa Barbara9688119
Merced9415154
Sonoma9099134
Kings818683
Solano724974
Marin7038128
Madera494574
San Luis Obispo409232
Placer405257
Yolo311958
Butte304151
Santa Cruz274425
Napa191815
Shasta183930
Sutter183012
San Benito141915
El Dorado13064
Yuba128810
Mendocino111821
Tehama8248
Lassen7641
Lake67815
Glenn6493
Nevada6018
Humboldt5619
Colusa5496
Calaveras33917
Amador31316
Tuolumne2584
Inyo22015
Siskiyou1870
Mono1762
Del Norte1751
Mariposa782
Plumas630
Modoc280
Trinity250
Sierra60
Alpine30
Unassigned00
Chico
Clear
79° wxIcon
Hi: 81° Lo: 48°
Feels Like: 79°
Oroville
Clear
78° wxIcon
Hi: 79° Lo: 49°
Feels Like: 78°
Paradise
Clear
79° wxIcon
Hi: 74° Lo: 51°
Feels Like: 79°
Chester
Clear
59° wxIcon
Hi: 66° Lo: 38°
Feels Like: 59°
Red Bluff
Clear
81° wxIcon
Hi: 82° Lo: 49°
Feels Like: 81°
Willows
Clear
79° wxIcon
Hi: 82° Lo: 45°
Feels Like: 79°
Winds will not be as strong today, but the Red Flag Warning for high fire danger will continue through 5pm. Pleasant conditions are ahead for your Saturday, but then a more substantial wind event will bring extreme fire danger back into our forecast from Sunday through Monday.
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