Sunny Start to the Work Week

This work week starts very differently than last work week.

Last Monday, the visibility at YVR was close to zero for more than half the day.

Today... completely clear.

Tomorrow - more of the same thanks to an upper ridge that will keep the systems away until midweek.

A front will move across the Lower Mainland Wednesday and bring showers to the South Coast on Wednesday afternoon.

Temperature highs will be about seasonal between 10 and 12C however clear conditions overnight will drop temps down close to freezing with the risk of frost. 

Bye Bye Fog

For over the past week under this strong upper ridge, Vancouver airport has started the day with fog.

Although there is a weak upper low sitting right above Vancouver Island today, there won't be much of a noticeable change with this system.

The pattern will finally change this weekend when the temperature inversion breaks down thanks to a northerly flow that will advect cooler and drier conditions as an upper trough moves through the area Sunday.  

Expect brighter conditions on Monday, and by midweek we will be back to a more typical Fall pattern with systems moving in from the west.

Need a Can of "Ridge-Be-Gone"

Under most circumstances, being under the influence of an Upper Ridge and it's stabilizing effects is a welcome state.  In the fall however, it can, and recently has, kept us in the fog. Trust me, Wesla and I are getting just as tired as you of this "stability". Time to go to the weather store for a can of Ridge-Be-Gone.

In it's simplest terms, wind and the vertical mixing of the atmosphere it causes, is what is needed to inspire a change in the weather. The Winds of Change will begin to blow soon...

By tomorrow (Thurs)  this Upper Ridge will begin to collapse, flatten and shift east. That will be the key to opening the door to enough vertical mixing of the boundary layer (air closest to the ground) to get us out from under this fog.

Expect less fog, more sun and seasonal  temperatures into the weekend.