Winter Thread 2017-18 (Northern Hemisphere) (snow, warm, recorded, temperature)

[Cambium]

6amEST temps this morning.


SouthEast









Northeast: 17°F here. 19° in NYC. 18th time NYC dropped under 20F this season.

[Cambium]

Coming up...

Thursday-Friday


This week another cold front coming across on Thursday. By Thursday night-Friday morning its at the coast and will drop another 1-3" at least from NYC northward. Light falling snow.

This frame is for Friday 7am (the precip intensity is the average for 6 hrs prior 1-7am)





Then... the one I'm really watching.


Sunday-Monday

This weekend the Jet stream should dig south again and depending where the right trough axis is, a storm will come up the coast!


This frame is for Monday 7am. Euro is west more (Rain for coast). Canadian is East more (more snow for coast).





Then...... Wednesday February 7th Jet stream doesn't dig as much but a storm comes from the base of the trough and heads off the coast for another coastal storm. Still a week away for this one and the previous 2 storms could alter this storms outcome.









Active Pattern


* Never forget its a matter of ~50 miles with center of storm that makes the difference between rain and big snows. You wont know exacts until 24-36hrs before and sometimes day of! Just look at the overall pattern and potential!

[LKJ1988]

Hope we get enough upper level support for some good rain again.

[Cambium]

I haven't checked in a while. Here is the 5000' temps and upper level pattern this morning.


I outlined about where the Arctic Jet Stream is.. I see the Polar Vortex north of Hudson Bay and the true Arctic air over Canada... but What the heck is going on the other side of the globe?


Looks like Russia and down into China getting some cold. and maybe no wonder why Iran got snow? Freezing line looks like it's pretty far south...





Although when looking at the anomaly it doesn't look too crazy but can we trust the "avg" data from that side?

[speagles84]

Lots of snow yesterday in the mountains outside Pittsburgh

https://www.facebook.com/SevenSpring...84551628254976

[Cambium]

IF the Vortex splits and IF a ridge can build and wedge over the Arctic, the broken piece of Vortex COULD slide down North America and would make for an extremely cold & snowy end of February and March in the U.S.

https://twitter.com/judah47/status/958690150111940608

[rpvan]

Originally Posted by Cambium

IF the Vortex splits and IF a ridge can build and wedge over the Arctic, the broken piece of Vortex COULD slide down North America and would make for an extremely cold & snowy end of February and March in the U.S.

https://twitter.com/judah47/status/958690150111940608

What would that mean for the forgotten portion of the US?

I'm assuming more of the same?

[chicagogeorge]

GFS is going gangbusters with a Polar Vortex split.

Looks like winter is only getting started


https://twitter.com/WinterExpert/sta...47754394112001

[chicagogeorge]

https://twitter.com/WinterExpert/sta...39073673744384

[Cambium]

Originally Posted by rpvan

What would that mean for the forgotten portion of the US?

I'm assuming more of the same?

Lol. We'll have to see. Depends. Havent you had about normal temps recently? Or you just want extreme cold? Actually didnt you get below normal in October or November?