Category Archives: photography|landscape

A La Nina During an El Nino?

Grass along the margins of the main drag in Upper Las Virgenes Canyon Open Space Preserve,formerly Ahmanson Ranch.

Sporadic rain in the Los Angeles area has finally produced a little green in local open space areas. Here, along the margins of the “main drag” in Upper Las Virgenes Canyon Open Space Preserve (formerly Ahmanson Ranch).

As of today, (preliminary) NWS climate data indicates Downtown Los Angeles (USC) has recorded 1.92 inches of rain since July 1. This is 7.31 inches below normal. Leafing back through weather service data prior to July 1, this is the total rainfall recorded since May 22, 2006 – a period of nearly nine months.

What happened to our El Nino rains? According to NWS scientist Ed Berry, “the global circulation has been generally La-Nina like since about late November.” This is despite an El Nino event that peaked in November or December, and persisted at moderate strength into January. See his blog Atmospheric Insights for the technical details.

A period of unsettled – possibly showery – weather is forecast for the Los Angeles area beginning Sunday evening and continuing pretty much through the week. At the moment* the best chance for measurable rain appears to be on Monday and Thursday. We’ll see!

*Updated Saturday, February 17, at about 11:00 a.m.

Related posts: The Color of Rain, El Nino Drought, Sunset Snow Shower, Rainy Morning on Rocky Peak Road.

Rainy Morning on Rocky Peak Road

Steam rises from Rocky Peak Road near Fossil Point.

It was nice to start a run in the rain and see a few mud puddles along the way! Southern California has had so little rain the last several months that any rain is something to celebrate. Since the start of the water year on July 1, the official weather station for Los Angeles at USC has recorded only 1.48 inches of rain. This is more than 5 inches below normal for the date, and depending on the rain received the next three days, the July 1 to January 31 rainfall total could be the 5th driest since recordkeeping began in 1877. (Downtown Los Angeles recorded only 0.02 inch over the three days, and according to a NWS statement issued February 1, July 1 to January 31 was the 5th driest on record.)

Unless you are particularly fond of mud, Rocky Peak Road is usually a good choice for a run if it’s raining, or has rained recently. Perched on a ridge on the border between Los Angeles and Ventura counties in Rocky Peak Park, its sandy soils are generally well drained. Except for a few short sections of road, mud isn’t too much of an issue unless you run beyond “fossil point,” the high point of the road at about mile 4.8. Here there is an outcrop of fossil scallop shells.

Related posts: San Fernando Valley from Rocky Peak, Chumash-Las Llajas LoopSunset Snow Shower

Sunset Snow Shower

Low angle rays of the setting sun highlight a snow shower over the Rocky Peak

When I heard the news reports of snow in the Santa Monica Mountains along Kanan-Dume road near Malibu, I hoped to find a little snow or hail up at Sage Ranch Park on my afternoon run.

The isolated snow showers, hail and sleet were produced by convective cells that developed as a result of instability associated with a passing upper level low. Some of these cells also generated some lightning and thunder.

There was no snow on the ground at Sage Ranch, but the low angle rays of the setting sun did highlight a snow shower over the Rocky Peak Park area. In March of last year there was snow at Sage Ranch and Rocky Peak.

Related posts: Chumash Trail Snow, Oat Mountain Snow, San Fernando Valley from Rocky Peak.