Category Archives: clouds

Chasing a Sunrise, Taking a Moonshot, Los Padres Snow, and a Dark Line in the Sky

Colorful sunrise in the eastern Santa Monica Mountains

I was running up Calabasas Peak Mtwy fire road trying to get a better view of the eastern sky, but the view in that direction was blocked by a steep hillside. The road turned to the northeast up ahead, and I hoped the best moments of a rapidly-evolving sunrise would not be lost.

A couple of breathless minutes later, I rounded a corner and was rewarded with an unobstructed view of a vivid, pink-red-orange mackerel sky. Focusing on the ridgeline near Topanga tower, I shot several sets of bracketed photos.

Handheld snapshot of the Moon, using a Lumix ZS100
Handheld snapshot of the Moon. Click for larger image and more info.

Excited by the sunrise, I continued up the fire road, scanning my surroundings for another photo. My eye settled on the gibbous moon. High in the sky, it’s bright face was subdued by a thin veil of pinkish-gray cloud. I’d previously experimented with handheld shots of the Moon using my running camera — a Lumix ZS100. Zooming to an equivalent focal length of about 250mm, I held my breath, steadied the camera the best I could, and took a few shots. Here’s one of the images — cropped and sharpened — with enough detail to see craters, maria, and some other lunar features.

At the bottom of Topanga Lookout Ridge there were several bigberry manzanita bushes covered with flowers. A hummingbird was up before sunrise, buzzing about the blossoms, busily drinking the precious nectar. Although it had rained a couple days before, this rain year there had been little rainfall, and a corresponding scarcity of early season wildflowers.

As I climbed higher on the ridge, the mountains northwest of Los Angeles came into view, white with snow from the recent storm. The snow-covered peaks are south of Mt. Pinos and Frazier Mountain, in the area of San Raphael Peak, McDonald Peak, Sewart Mountain and Snowy Peak.

Contrail shadow near Los Angeles
Contrail shadow.

Like snow on a mountain, there is a purity in the form and appearance of clouds. When a long, dark streak appeared across a layer of high clouds, it was hard to miss. In this case, the dark line appears to be the shadow of a contrail of a jet flying above the clouds. At the time LAX was reporting scattered clouds at 19,000′ and 23,000′, with a broken layer of clouds at 28,000′. Given the height of the clouds and orientation of the contrail, it may have been from a flight from San Diego to San Francisco.

Topping out on the ridge, I smiled when I saw the masked couple dancing on the Lookout, and continued west toward Saddle Peak.

Some related photos: An Early Morning Dance at Topanga Lookout, Fallstreak Hole, Rainbow Colors in Cirrus Clouds Over Los Angeles

Winter Sky: Cirrocumulus Clouds

Cirrocumulus clouds from Upper Las Virgenes Canyon Open Space Preserve, also known as Ahmanson Ranch

Cirrocumulus clouds form at high altitude. They are primarily composed of ice crystals but also contain supercooled water droplets.

The photograph of cirrocumulus clouds was taken in Las Virgenes Canyon on a trail run from the Victory Trailhead of Upper Las Virgenes Canyon Open Space Preserve, also known as Ahmanson Ranch.

Some related posts: Pattern Change Ahead, Fallstreak Hole, Rainbow Colors in Cirrus Clouds Over Los Angeles

Explosive Growth of the Lake Fire

Development of Lake Fire pyrocumulus cloud over 10 minutes
Growth of the Lake Fire in just 10 minutes.

Lake Fire pyrocumulus cloud at about 4:21 p.m.
Lake Fire pyrocumulus cloud at about 4:51 p.m.

The photographs above show the rapid development of the pyrocumulus clouds associated with the Lake Fire, near Lake Hughes. The timestamps are approximate.

According to the Lake Fire incident page, the fire was first reported on August 12th at 3:40 p.m.

The photographs were taken during a run at Sage Ranch Park. This is the location of the Sage Peak1 and Sage Peak2 ALERTWildfire cams.

Related post: Did Lightning Start the 2002 Curve Fire?

Chivo Canyon Peaks and Clouds

Chivo Canyon peaks and clouds
Climbing out of Chivo Canyon on the way to Las Llajas Canyon

From an out and back run between Tapo Canyon and Las Llajas Canyon.

Like the Las Llajas Canyon Trail, this segment of the Chivo Canyon Trail is part of the Rocky Peak 50K course.