Sometimes it gets chilly in Los Angeles. The temperature at Downtown Los Angeles (USC) dipped to 39°F last night. That's about eight degrees below normal and only a couple of degrees away from tieing the record for the date.

It gets colder in the valleys. The temperature was in the mid-30s when I started my run at the 'End of Reseda' on the San Fernando Valley side of the Santa Monica Mountains. I was headed over the hill to Will Rogers State Park, then to Temescal Canyon, and then back to Reseda.

When you start a long run on a cool day just as the sun is coming up it's hard to know what clothing you're really going to need. In Southern California it seems more times than not the extra shirt goes into the pack a mile into the run and stays there.

The running was excellent on the Will Rogers segment of the Backbone Trail. I hadn't been on this segment since last Winter and much work had been done on the trail. Even with yesterday's rain the trail was in good shape.

This time I didn't mind so much that I had an extra shirt in the pack. The day had dawned mostly clear with a few scattered and tattered clouds, but by the time I was headed back to the valley it was nearly overcast. It was breezy and cool and there were some big buildups to the south and east of the city. It looked like a shower might pop up at any time.

Some related posts: Chaparral Freeze, Cape Ivy on the Rivas Canyon Trail, Will Rogers Western Ranch House

Rain showers and a segment of a rainbow over the San Fernando Valley.

From this afternoon's run in the Simi Hills.

From this morning's run of the Garapito loop from Marvin Braude Mulholland Gateway Park at the southern end of Reseda Blvd.

Some related posts: Ferns Along the Garapito Trail, Garapito Trail Runs

Sunday, running in the rain on Rocky Peak, it occurred to me that I'd done a lot of runs on rainy days this Fall.

When I got back from the run I checked the NWS web site and found that during the months of October, November and December there have been 17 days with measurable rain at Downtown Los Angeles. Normal for that period (to date) would be around 9 days.

The thing is, we've yet to have a day with a half-inch or more of rain Downtown, and we're only at about 60% of normal rainfall for the water year.

At the moment it looks like another weak system passes through tomorrow afternoon and evening, followed by somewhat wetter systems Sunday night and Wednesday.

At times both the GFS and ECMWF have been forecasting a stronger system might impact Southern California near the end of the year. Today the GFS has it in our forecast and ECMWF doesn't.  The culprit in the ECMWF forecast is a cutoff upper level low, so look for the forecast to change!

The photograph of the cumulus buildups (north of Los Angeles) is from a run at Ahmanson Ranch on December 13, following the passage of a cold front.

The temp was in the 40s and the chaparral wet with rain when we started the run. We were doing a two part trail run. The first part would be the 15 mile segment of the Backbone Trail from Kanan Rd. to the Mishe Mokwa trailhead on Yerba Buena Rd. The second would be the 6 mile Mishe Mokwa - Sandstone Peak loop.

The weak front that produced the overnight rain had marched on, and now skies were clear and it was a little breezy. As has been the case with many weather systems this year, there hadn't been a lot of rain. Though muddy in spots, the Backbone Trail was in surprisingly good shape, and the running excellent.

In addition to the greening of the hills and the sprouting of many annuals, the frequent, light rains had also created perfect conditions for the growth of a  variety of mushrooms and other fungi. Fortunately I was running with a sharp-eyed mushroom collector from the PNW that could pick out partially buried earth stars and other mushrooms among the leaves, twigs and other debris in the deep shade along the trail.

Here are three of the more peculiar fungi. Click the image for more info and a larger image.

Orange Jelly

Comb Tooth

Earth Star

Some related posts: Circle X Crags and the Channel Islands, Mishe Mokwa - Sandstone Peak - Grotto Trail Run

The crest of the Santa Monica Mountains east of Castro Peak stands out in bold relief above a tumultuous ocean of low clouds and fog.

From this morning's run of the Bulldog loop in Malibu Creek State Park.

Some related posts: Bulldog Loop or Saddle Peak Out & Back?, Malibu Creek State Park Scenic Loop

Although we didn't have the deluge they experienced in Central and Northern California, Southern California did get some rain. From Tuesday night (11/27) to Monday morning (12/3) Downtown Los Angeles (USC) recorded 1.03 inches, bringing the water year total to 1.36 inches. As of today that's 1.08 inch below normal.

Some foothill and mountain stations were able to wring out much more rain from the moist tropical flow. Opids Camp recorded 3.02 inches, White Ledge Peak 4.09 inches, Refugio Pass 4.61 inches, and Rocky Butte 8.51 inches. For some storm totals from up north and more info about the "atmospheric rivers" that relayed the moisture up from the tropics, see my December 8 post on Southern California Weather Notes.

The photo above was taken between "storms" early Sunday morning, December 2, on a run in Topanga State Park. It started to rain shortly after I finished the run.

It looks like we might get a little more rain this next week, with a chance of rain on Wednesday and then maybe again on the weekend. We'll see!

The marine layer spills over the crest of the Santa Monica Mountains between Saddle Peak and Malibu Canyon.

From this evening's run on the Phantom Trail and other trails in Malibu Creek State Park.

Related post: Saddle Peak from the Phantom Trail

Even by Pacific Northwest standards it had been wet. Over the past five days Portland had recorded over four inches of rain. Earlier in the week heavy rain and strong winds had pummeled the area -- flooding roads, toppling trees, causing numerous traffic accidents and leaving thousands without power.

Today, Thanksgiving Day, was the first in several that no rain was forecast. Taking advantage of the good weather our Thanksgiving Day -- and that of many Portlanders -- started with a hike at the Hoyt Arboretum.

The arboretum's collection includes over 1000 species, accessed by a 12 mile network of well-maintained and marked trails. The collection includes species from around the world. Some examples are dawn redwood from China, butterfly maple from North Korea, Himalayan Juniper from Nepal and Patagonian Cypress from the Andes. Given they are usually found near treeline, I was surprised to see the arboretum's collection includes bristlecone pines.

My run on the Wildwood Trail started at Fairview, at the end of a loop hike in the arboretum that had taken us to an overlook with a view of Mt. St. Helens -- and on a clear day -- Mt. Rainier and Mt. Adams. I had promised to be back to the house in "about two hours " so the plan was to run north on the Wildwood Trail for about an hour and then head back.

Trail runners love running new trails -- especially trails as beautiful and well-maintained as the Wildwood Trail. The 30 mile long trail is just part of a 70+ mile system of trails in a 5100 acre urban park managed by the Forest Park Conservancy.

I was amazed -- after all that rain the Wildwood Trail was in great shape. My socks were dry and my running shoes were just a little damp around the edges. The running was superb. I'd run down to Burnside, up to Pittock Mansion, and then down to Macleay Park. Continuing to descend, I'd run along Balch Creek and past the iconic Stone House.

The theme was green on green, with towering Douglas-fir, hemlock and cedar. A mixed understory of alder and maple was highlighted by mosses, ferns and remnant splashes of yellow, orange and brown.

At Wildwood's junction with the Aspen Trail I was about 55 minutes out. Time to start thinking about turning around. I ran a few yards down the Aspen Trail, then decided I'd rather stay on the Wildwood Trail.

It had been just four days since I'd run a 50K in Kernville, California, and I knew I was going to be slower on the way back. At some point soon I really would need to turn around. I started up some switchbacks, wondering what was on the trail ahead...

Was that rain I heard outside of the motel? Bleary-eyed, I grabbed my phone and checked the current weather radar. If it wasn't raining, it would be soon. The radar showed an elongated patchwork of lime green blotches, sprinkled with yellow, approaching the blue dot marking the room in Kernville, California.

It looked like the front was going to pass through a bit earlier than forecast -- right about the time we would be starting the 50K. The good news was there didn't appear to be a lot of shower activity behind the front. Whether that would be the case in the middle of the day remained to be seen.

The annual Run-4-A-Way Burger Run follows the 14.5 mile Whiskey Flat Trail from the Burlando Trailhead in Kernville up the Kern River to Johnny McNally's Fairview Lodge and Restaurant. This year R.D. Mike Lane had added a 50K. That's what I was running. The "Double Burger" would do the trail both ways -- from McNally's down to Kernville and then back again.

NOAA’s Gulf of the Farallones National Marine Sanctuary Ocean Climate Center headquarters at Crissy Field, San Francisco.

From Saturday morning's Presidio loop run.

Models didn't show the upper level cutoff low affecting Southern California until Monday or Tuesday at the earliest. But upper level lows tend to be notoriously unpredictable, so I'd been checking the computer weather models and NWS forecasts every day. The NWS forecast for today's run/hike to the summit of San Gorgonio looked pretty good:

"Partly cloudy. Highs 59 to 69 above 6000 feet to 69 to 79 below 6000 feet. Areas of winds west 15 mph in the morning becoming light. Near ridge tops and along desert slopes... Areas of winds southwest 15 mph...Gusts to 25 mph in the morning."