Some shots of the Bobcat Fire while away from the house
The wind has shifted and the smoke in the atmosphere isn’t as suffocating as it has been until this morning. I still can’t see the Bobcat fire from the house by looking up at the mountain, but it’s apparently very close to Mt. Wilson and the closest part of the fireline is about 3 miles from the house. Things generally aren’t looking good. I suspect we may see flames before the evening is out.
Read a tweet (Twitter)
Read Bobcat Fire: Now More Than 19K Acres, Evacuation Warnings Remain In Place For Foothill Communities (LAist)
The brush fire erupted near the Cogswell Dam and then spread rapidly amid an intense, record-breaking heat wave, prompting evacuation orders for Mt. Wilson Observatory.
Still growing in size, but fortunately not toward high population zones at the moment.
Annotated Bobcat Fire Update (City of Arcadia)
***Update as of 9/9/2020 @ 4:51 PM***Voluntary evacuations lifted for residents north of Foothill Blvd. and east of Santa Anita Ave. The Bobcat Fire has generally progressed away from the City of Arcadia.  The current weather forecast suggests that Santa Ana winds will dissipate this evening and the Red Flag Warning will be removed after 8:00 p.m.Based on these factors, the City of Arcadia is removing the recommendation for residents to evacuate.  However, residents are advised to remain on alert for any changes to weather conditions that may affect the fire.  Evacuations may be necessary for your safety if conditions change. 
This is a particularly good sign!

Replied to a tweet (Twitter)
I’m sure there was a similar peak in 2009 for the Station Fire. I remember seeing the pyrocumulus cloud in Glendale/Pasadena all the way down to San Diego.

It’s also the last time that Mt. Wilson was threatened, though tonight it’s from the East side of the mountain. I’m watching closely because I’m 8 miles from the Bobcat Fire to the East and we’re under an evacuation warning. Fortunately the live cam has some reasonably clear footage of the immediate danger as the observatory is 4 miles up the hill above us.

Night photo of flames burning near the Mt. Wilson Observatory.
Mount Wilson Observatory live cam facing east toward the Bobcat Fire at 12:40 AM PST
Read Monrovia, Duarte On Alert As Bobcat Fire Continues Its Rapid Growth (CBSLA / KCAL 9)
With powerful Santa Ana winds expected to create challenges for firefighters Tuesday, the Bobcat Fire burning in the Angeles National Forest north of Monrovia nearly doubled in size for the second straight day. The Bobcat Fire has burned 10,344 acres and still had zero containment as of 10 p.m. Tuesday, according to the U.S. Forest Service. The fire is churning through some vegetation and brush which has not burned in more 60 years. “The canyons that this fire has lined up with — Monrovia Canyon, Santa Anita Canyon, Little Santa Anita Canyon — those canyons have not burned since 1957 in the Monrovia Peak Fire,” Angeles National Forest Chief Robert Garcia said Monday.
Nothing really very new here.