- Issued at
- 04:00 PDT/PST
- Created by
- Alto Cumulus & Skadi
The Stratus Quo
A special thanks to Jon Snow for coming up with that blog title, it sums the situation up quite nicely.
A ridge of high pressure remains over southern B.C., and this will keep moisture trapped in the valleys resulting in widespread valley cloud. Meanwhile, a series of troughs being steered up and over this ridge move across the Yukon and Alberta. So are we looking at bluebird days for the mountain tops of southern B.C.? Well, that's going to depend on just where you are as a series of weak shortwave troughs cross the province. Today, some higher clouds and a chance of light flurries are expected for eastern B.C. from the North Rockies south to the U.S. border. Wednesday afternoon some higher clouds will once again move across southern B.C. Otherwise, conditions in the alpine are expected to remain clear.
Freezing levels are expected to remain above 2500 metres for Vancouver Island and the Sea to Sky ranges, with above freezing layers persisting over inland sections of the South Coast as well as the Northwest ranges today and Tuesday.
A frontal system moving into the Gulf of Alaska will spread some cloud to the Yukon and Northwest coastal ranges today, with light snow and strong southwesterly winds spreading into the Yukon ranges this afternoon.
The general ridge pattern will keep the potential for nightly valley cloud formation and patchy fog through mid-week.
An upper ridge remains offshore this morning. In the animation above, we see a series of shortwaves riding over the ridge, flattening it a bit, and then the ridge rebuilds. These shortwaves are associated with some increased higher-level clouds (above the mountain tops), as well as a chance of flurries today along the B.C.-Alberta border.
While we see some systems moving into the Gulf of Alaska this week, it's not until Thursday that the axis of the upper ridge begins to shift east. This opens the door for a change in the weather pattern coming Friday into the weekend.