Vancouver, your weekday forecast analysis (bonus: lenticular cloud showcase)

After Vancouver's record breaking warm day yesterday, showers have returned with an unsettled NW flow and upper level trough entering our region as well.

Tomorrow, the trough will shift south and we'll be left high and dry as the sun will enter the picture, but there's a couple hiccups later on this week. A weak front looks to move through on Thursday, but I'm not too confident yet. (and neither are the models).

Friday is looking sunny, but models are in more agreement for a disturbance to move into the region on Saturday. Daytime highs will float between 12-15 degrees for the next several days.

After next Tuesday some of the global models are showing a ridge building with a bit of an offshore flow (in October?!), so I hope that holds. This type of set-up has the potential to push temperatures into the high teens. Below is the ECMWF 850 hPa temperatures (approximately 1500m above sea level). The photo shows temperatures warming at the 850hpa for southern BC with the  building of a nice healthy ridge in from the south...We can dream, can't we?

Next wednesday 850millibar.png



On the theme of clouds from last post, a blog viewer confessed their love for another rare and unusual cloud formation, and I would like to feature a prolific photo of a lenticular cloud taken in Washington State of Mt. Rainier: 

A lenticular cloud forms when warm air runs into the side of a mountain promoting orographic uplift, which then cools and creates the cloud. On the leeward side the cloud disappears creating the sunning visual. It looks like the cloud is at a standstill, but it's continuously moving and flowing over the topographic barrier.

Photographer Jim George of Puyallup, taken November 20, 2004:

Lenticular cloud 1.png
Lenticular cloud 2.png