December 2020 Forecasts and Discussions

[Bonovox]

-1ËšC here, +4ËšC atop Sumas Mountain (elevation about 1 km). Inversion time!

Yes. Quite the inversion in place. +9 at 925mb.

[Rubus_Leucodermis]

-2.2˚C and clear as a bell here, +7 on Sumas Mountain. Been looking at the regional roundups, and not many stations are reporting fog. Some are, but they are a distinct minority, and it is often thin enough that the sky is visible through it. This is not shaping up to be one of those foggy “fake cold” inversion scenarios.

[wetcoast91]

Noticed the latest PNA numbers going to a neutral or weak negative territory. Cold building up in AK/Yukon. Unfortunate in that I would have preferred a longer spell of amplified ridging over the West Coast.

Looks like a weaker semi-permanent ridge between 125-130W over the next 2 weeks with weak troughs brushing over the West Coast.

Winter is initializing. Could see this take full effect in early-mid Jan.

[PortKells]

Aaand weather bell is broken, hours after I purchased the service. Your welcome

[stuffradio]

Noticed the latest PNA numbers going to a neutral or weak negative territory. Cold building up in AK/Yukon. Unfortunate in that I would have preferred a longer spell of amplified ridging over the West Coast.

Looks like a weaker semi-permanent ridge between 125-130W over the next 2 weeks with weak troughs brushing over the West Coast.

Winter is initializing. Could see this take full effect in early-mid Jan.

Won't anyone think of the Pineapple trees!?

[AbbyJr]

Aaand weather bell is broken, hours after I purchased the service. Your welcome

Its working fine for me.

[AbbyJr]

https://twitter.com/Met_khinz/status/13 ... 07584?s=20

https://twitter.com/MJVentrice/status/1 ... 71616?s=20

https://twitter.com/MJVentrice/status/1 ... 07393?s=20

[wetcoast91]

https://twitter.com/Met_khinz/status/13 ... 07584?s=20

This is actually not good. Well, good in the sense that we stay dry and cool but most of the cold dumps into the Praries and gets locked into the Midwest and East with a Greenland block and rising heights over 130W into AK and the Yukon.

[tyweather]

Definitely how the 6z looks but the 12z is quite different.
6z


12z

[AbbyJr]

https://twitter.com/50ShadesofVan/statu ... 89985?s=20

[AbbyJr]

This is actually not good. Well, good in the sense that we stay dry and cool but most of the cold dumps into the Praries and gets locked into the Midwest and East with a Greenland block and rising heights over 130W into AK and the Yukon.

Still lots of time to work out the details.

[Typeing3]

This is actually not good. Well, good in the sense that we stay dry and cool but most of the cold dumps into the Praries and gets locked into the Midwest and East with a Greenland block and rising heights over 130W into AK and the Yukon.

We can do well with west based -NAO blocks coupled with -PNA/-EPO. Only thing lacking right now is a SE ridge which will surely pop up at some point.

[AbbyJr]

We can do well with west based -NAO blocks coupled with -PNA/-EPO. Only thing lacking right now is a SE ridge which will surely pop up at some point.

Remember, the NFS model always has a warm bias for our regions.

[Catnip]

https://twitter.com/bamwxcom/status/133 ... 78691?s=21

AFB0CAFD-A6FD-4A11-88DC-175D49A8F019.png

[AbbyJr]

This is the winter we finally break the January curse. I'm going all in. Heavy low elevation snows and at least one top tier arctic blast.