Here comes the Cold/Snow

Ok folks, our cold front has already came through and passed through earlier this morning. And behind this front we are left with VERY CHILLY air aloft. At least cold enough right now for snow across the higher hills with some folks from Redmond to South Seattle to Sammamish Platue seeing snow at times but not sticking as per Cliff Mass blog.

But the real cold air comes in later this evening into tonight(see 500mb chart) with temps dropping to near -40c aloft. However, at the lower levels and at 850/925mb...the colder temps and or colder air makes there way down to near the surface for later tomorrow afternoon into tomorrow night.


As far as snow goes, not a whole lot is showing up on this mornings WRF-GFS12z or even last nights 00z. But in precip mode, there does appear to be numerous showers today into this evening with main FOCUS being in the PSCZ(see radar image) as this is where most of the precip will be seen. But could still see areas of showers outside the zone.

Not really expecting much snow nor am I expecting it to be wide spread due to showery nature of the trough and cold showery air mass with cold air cumulus(see inferred satellite). But could perhaps see at least a a couple inches or so in anyone place, but again, the focus should be in the CZ where say we could see around 3 to 5". but hard to say just how much though.

Our air mass looks to dry out tomorrow afternoon into tomorrow night as the cold and dry air works it`s way into our region with NNWLY flow. So would think any lingering snow showers should be gone by tomorrow night.

And should be chilly as highs will be in the 30`s to lower 40`s with low in the mid or lower 20`s as per the 12WRF model. Chilly temps continue into Monday/ Tue with conditions warming up by mid week.