Southern BC will quickly be hit by unusually heavy precipitation for this time of the yr.
And situations earlier than July 4th can be a humid affair, with probability of thunderstorms Saturday night and Sunday morning.
Let me begin by supplying you with the massive view: the whole predicted rainfall in the course of the subsequent seven days. The European Middle accrued precipitation forecast via 5 AM subsequent Thursday (beneath), reveals appreciable rain.. as a lot as 2-3 inches in southern BC, with the North Cascades and northeast WA getting a chunk of the moist motion
The College of Washington modeling system’s forecast is equally moist. BC geese can be joyful.
The primary massive rain motion will begin Saturday evening as an approaching upper-level trough forces a collection of thunderstorms that may transfer northward out of Oregon.
The uber-high decision UW forecast mannequin reveals the simulated satellite tv for pc picture at 11 PM Saturday (beneath). Essentially the most lively thunderstorms can be over the Cascades and japanese WA, however western WA ought to get a style of it.
Sunday can be a showery day, and on Monday (July 4th) many of the rain can be in japanese WA and much japanese WA.
The silver lining of the weekend rain is that the bottom can be wetted down earlier than all of the firework exercise on July 4th, decreasing the potential for unintended wildfires and residential destruction.
I ought to notice that the reason for the weekend rain is just like the origins of our moist spring: a persistent offshore trough of low stress.
Right here is the upper-level (500hPa stress, about 18,000) map at 11 AM Sunday. A powerful trough/low is centered simply east of Oregon.
Subsequent Thursday? The identical function is in place. It is a cool, moist sample for us. And it’s not going wherever.
With loads of rain over an already moist southern BC, wildfires there can be suppressed in that province via a part of the summer time.
This is excellent information for us in Washington State. BC fires have been a serious supply of latest summer time smoke.
However not this yr.
