- I usually update this page only when there is going to be a significant event, which is not too often in LA.
- For everybody in Southern California
- Last updated: May 1, 2013
Wooo! We finally have some rollercoaster LA weather changes coming our way…..
Today (Wednesday) = Same as yesterday…
But Thursday + Friday = HOTTEST WEATHER OF THE YEAR (easily 100–110+ in the valleys)
Saturday will be start being cooler.
Sunday and onto next week, high’s in the 70′s with lots of clouds, actually. (70′s even for the valleys)
Previous update from March 6, 2013
Scattered Light Showers will affect SoCal between Wednesday and Friday. Precipitation totals will be around 0.5-.75″ which is NOT MUCH considering this is spread out over 3 days time. Snow (4–8″) will fall anywhere above 5000 feet. The strongest impulse of the storm will arrive as early as Thursday morning and as late as Friday day. Most likely, knowing LA, most of the precipitation will fall Thursday night overnight.
Here is the hydrologic outlook for this winter season in California (it’s not good).
Previous update from Feb 19, 2013
We had a very warm Friday and Saturday, but the cooling trend started Sunday. You probably noticed yesterday it was quite overcast. We got a frigid little storm coming our way.
Now it’s Tuesday and there’s a chance of rain but not much. The real fun starts overnight where we have a possibility of 1/3 to 2/3″ of rain. And in the mountains? Snow resorts are going to get dumped on with 6–12 inches of snow! The storm is so cold even places like the Santa Monica and Santa Clarita Mountains can see a light dusting of snow. The storm should taper off on Wednesday afternoon but we’ll see!
Oh and it’s gonna remain quite chilly like this for pretty much the whole week.
Previous Update from Feb 8, 2013
FOR ANYONE THINKING OF GOING TO BIG BEAR OR MOUNTAIN HIGH FOR SKIING:
THE WINTER STORM WARNING IS NOW IN EFFECT UNTIL 10 PM PST THIS
* TIMING…HEAVIEST SNOW WILL OCCUR DURING THE DAY TODAY.
* SNOW ACCUMULATIONS…FOUR TO EIGHT INCHES ABOVE 4000 FEET…
WITH ISOLATED AMOUNTS UP TO TEN INCHES POSSIBLE ABOVE 6000
FEET…MAINLY ALONG THE COASTAL SLOPES. UP TO FOUR INCHES OF NEW
SNOW ARE POSSIBLE AS LOW AS 3000 FEET.
Previous Update from Jan 23, 2013
We got a 30% chance of showers between Thursday and Monday. Note that I didn’t say a 100% chance of rain so don’t just tell people “YA I HEARD IT’S GONNA RAIN ALL WEEKEND.” There’s just a 30% chance of showers which is insignificant in regards to precipitation.
The highs are lowering gradually everyday. By Sunday and Monday the highs are going to be just barely in the 60′s so yeah, it’s going to be cooler again, but it’s not terrible.
Previous update from Thursday, December 20, 2012
Here’s your Mayan weather forecast (end of the world is coming, remember?)
Okay no but seriously, we’ve been having much colder nights than usual for Southern California this week. There’s a couple cold fronts coming our way for the weekend to change things up. This will be bringing clouds, cooler temperatures for the day time and a chance of some precipitation!
So there’s a chance of showers/rain on Saturday and Sunday. The highs will be in the low 60′s but the low’s will be in the 50′s, so not bad! You could thank the clouds for that! (The coldest nights are the clear ones!)
Previous update from Thursday, October 11, 2012
Well there’s finally a hint of Autumn on the way! On Thursday (MY MOTHER FUCKING BIRTHDAY), a little [thunder]storm of a showery nature (not big goblets of rain), will touch down on the SouthernCalifornia coast and bring a little sprinkle, a drizzle, a little sumtin’ sumtin’ to turn that dust on your car into mud. A tenth inch of precipitation. Mountain tops above 7,000ft will be painted white. Variable, tranquil showers, on my mother fucking birthday.
All will clear out Friday… Saturday will be back to normal. Sunday and Monday will start heating up ever so slightly. Enjoy those crystal clear days.
Previous update from August 8, 2012
FORECAST: IT’S HOT AS FUCK. But you know that already. This happens in August every year. Want to read more shit verifying how hot it is? check out this article: July 2012 was hottest US month since records began
For this weekend: Looks like we’re going to have some showers and rain coming our way for SUNDAY into SUNDAY NIGHT. The coastline and valley areas are expected to receive 0.5–1.0″ which is quite a bit of rain for a one-day-event.
Since this is a southerly flowing system (meaning, the system is going to spiral around and come from the south), the mountains… well, specifically the southern facing slopes may get substantially more rain (2–4″!) due to orographic lift (read below for understanding!). Places like big bear will most likely get at least a foot of snow.
Long term: More low pressure systems are expected to move through for the next few weeks. The next weather “disturbance” may be as early as next Thursday but it’s too early to tell.
WHAT IS OROGRAPHIC LIFT YOU ASK?
When clouds encounter a mountain, they cannot go through them so they are forced to ascend due to the topography of the Earth. As they ascend, they cool adiabatically.
What does adiabatically mean? Air pressure decreases as you go up in altitude. The cloud is losing energy not because of heat transfer, but because it needs to expand in volume to make up for the decrease in the surrounding air pressure, causing it to cool dramatically.
Okay, back to orographic lift: The colder air gets, the less water vapor it can hold. So as the cloud goes up the mountain and (adiabatically) cools down, the air will reach its saturation point. In other words, the air will be completely saturated with water and no more water can be suspended in the air. At this point, the condensed water vapor has no choice but to fall down from the cloud and precipitation occurs.
The direction of the wind determines which side of the mountain will experience this orographic lifting. In the case for Sunday, it will be the south-facing slopes because the system is going to come from the south. What are some south facing slopes? Well there are several east-west transverse ranges in SoCal such as the Santa Monica mountain range and the San Gabriel mountain range that runs parallel to the 210 freeway. That’s one of the reasons why it’s a desert on the other side of that mountain range.
Previous discussion from Friday March 16, 2012
Video taken from Runyon Canyon showing Saturday’s impulse of rain just after sunset coming from the ocean
Forecast from Friday March 16, 2012: A very powerful and cold storm is here mainly just for Saturday.
Totals? The foothills and mountains will get 1–2 inches of rain and the high elevation mountains will receive at least half a foot of snow.
Okay here’s the deal! Most of the rain will be falling on Saturday. The heaviest precipitation will occur around the late morning today and again around sunset time. A few hours after it’s been dark already, the precipitation will taper off dramatically into just intermittent showers.
It may be drizzling, just barely, around 2am and 3am on Sunday morning but by 4-430am, the showers will be inconsequential and the storm may be completely over with.
If you like riding bikes, try a new experience on Sunday morning at 4AM, join the the Wolfpack Hustle: Marathon Crash Race that happens before the LA marathon to take advantage of the 26 miles of road that’s closed to cars early in the morning with all that FRESH AIR. Note: Last year, 500+ cyclists showed up and it had a very similar weather pattern! This time we expect 1,000+ to show!
If you like running, go run/jog/walk/jog/run/walk in the LA marathon on Sunday.
If you’re looking forward to snowboard or ski, Sunday and onward will be amazing at the local ski resorts.
Wanna go in the ocean? I recommend you check the water quality report before you go in the water because most beaches are super clean while others are consistently questionable.
To see the last weather video I had taken, click here.
There could be lingering moisture/instability in the mountains and antelope valley on saturday, but Dry wetaher can be expected EVERYWHERE by Saturday night.