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SEVERE WX : Fire Weather Watch View Alerts

Storm Tracker Forecast: High fire danger & improving air quality today

Gusty winds will result in high fire danger in some areas and improving air quality for others in your Thursday forecast. We'll also have the potential for showers returning to portions of northern California later today.

Posted: Sep 17, 2020 6:00 AM
Updated: Sep 17, 2020 6:24 AM

Slightly cooler temperatures, gusty south winds, and a chance for showers in the Northern Mountain are all ahead in your Thursday forecast. Low pressure off the coast in the Pacific is inching closer to the Pacific Northwest today and that will bring another round of gusty south to southwest winds into our region this afternoon and evening. The gusty winds paired with relatively low humidity values are prompting a Red Flag Warning for high fire danger in portions of Plumas, Lassen, and Modoc Counties this afternoon. Modoc County is set to be under a Red Flag Warning from 2PM through 8PM today, while Lassen and Plumas Counties are set to be under the Red Flag Warning from 1PM this afternoon through 11PM Friday night. Peak wind gusts could reach up to around 40mph in these areas and humidity is projected to dip into the teens.

Skies are mostly clear of clouds, but smoke continues to blanket northern California for the start of your Thursday. Some areas have seen air quality improve compared to 24 hours ago, while others are starting out a little worse off. The biggest improvements have been in the northern end of the valley and the Northern Mountains. Mid valley, foothill, and Sierra locations are a little worse than yesterday morning. Temperatures are starting out in the 50's to 60's in the valley and foothills, while mountain areas are ranging from the upper 30's to lower 40's in the Sierra to the mid 40's to mid 50's in the Northern Mountains. Winds are mostly up to around 10mph out of the northeast this morning, but will be picking up out of the south again this afternoon. Sustained winds up to around 10mph are expected, with most areas seeing gusts up to around 20mph. Gusts will be stronger in the foothills, Sierra, and Cascades. The stronger south winds are expected to help air quality improve this afternoon and evening, but will also result in elevated fire danger. Humidity will mostly end up in the 15 to 35 percent range this afternoon. Fire danger will be in the high range again today. High temperatures are projected to top out in the mid 80's to low 90's in the valley, while foothill and mountain areas end up in the upper 70's to mid 80's. There will be a decent chance for some showers in the Northern Mountains late this afternoon through this evening.

Low pressure will move into the Pacific Northwest on Friday, and that will bring a bigger impact into our forecast. Temperatures will be much cooler on Friday afternoon, winds will still be gusty out of the south, and the potential for showers will become more widespread across the far northern zones of our region. Showers will be possible as far south as Redding, but will mostly be limited to higher elevations. The threat of thunderstorms now mostly looks to be staying to our north on Friday. High temperatures will top out in the mid to high 70's in the valley, while mountain and foothill areas top out in the 60's to 70's. Low pressure will then track off to our east and high pressure will slowly rebuild across northern California this weekend. Temperatures will warm back into the low to mid 80's on Saturday in the valley, and into the mid 80's to low 90's on Sunday. Mountain areas can expect mid 70's to lower 80's through the weekend. We'll also see the return of lighter winds, and winds mostly out of the north, which could bring bigger impacts to air quality back into our forecast. Temperatures, winds, and sky conditions are not expected to change much through the start of next week, but models are hinting at a little bump in temperatures towards the middle of next week.

California Coronavirus Cases

Data is updated nightly.

Confirmed Cases: 886939

Reported Deaths: 17167
CountyConfirmedDeaths
Los Angeles2904866944
Riverside650561275
San Bernardino609451065
Orange576351423
San Diego53263863
Kern33551413
Fresno30220430
Sacramento24811474
Santa Clara23591382
Alameda22932435
San Joaquin21436484
Contra Costa18273238
Stanislaus17403394
Tulare17317279
Ventura13930160
Imperial12610336
San Francisco11969137
Monterey1115884
San Mateo10918157
Santa Barbara9671119
Merced9386153
Sonoma9016134
Kings817383
Solano720574
Marin7036127
Madera492873
San Luis Obispo408032
Placer402355
Yolo309958
Butte302651
Santa Cruz272524
Napa190814
Sutter182112
Shasta178629
San Benito141114
El Dorado13024
Yuba128010
Mendocino111121
Tehama7938
Lassen7611
Lake67815
Glenn6473
Nevada5988
Humboldt5609
Colusa5486
Calaveras33917
Amador31316
Tuolumne2574
Inyo21815
Siskiyou1860
Del Norte1751
Mono1752
Mariposa782
Plumas610
Modoc270
Trinity250
Sierra60
Alpine30
Unassigned00
Chico
Clear
73° wxIcon
Hi: 79° Lo: 50°
Feels Like: 73°
Oroville
Clear
76° wxIcon
Hi: 81° Lo: 51°
Feels Like: 76°
Paradise
Clear
73° wxIcon
Hi: 77° Lo: 50°
Feels Like: 73°
Chester
Clear
49° wxIcon
Hi: 59° Lo: 33°
Feels Like: 49°
Red Bluff
Clear
73° wxIcon
Hi: 80° Lo: 56°
Feels Like: 73°
Willows
Clear
73° wxIcon
Hi: 80° Lo: 54°
Feels Like: 73°
Very strong winds and dry conditions are driving critical fire danger today. A Red Flag Warning for high fire danger, a Wind Advisory, and a Freeze Warning are all in effect for the start of your Thursday.
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