Jump to content
  • Member Statistics

    17,792
    Total Members
    7,904
    Most Online
    manaja
    Newest Member
    manaja
    Joined

January Medium/Long Range Discussion


WinterWxLuvr
 Share

Recommended Posts

11 minutes ago, Weather Will said:

So does WB 6Z GEFS.  Chilly, but dry.  But we can enjoy the expected 2-4 in the short range, and hope something pops in the long range.

E9BF6D0B-76F3-4D0D-92B1-5B2B09F8659F.png

C62BBD5F-11A4-4B93-80D4-CA7B126F7721.png

Thing about that upper level nw flow is that it is gonna be dry most of the time. Need snow on the ground to make it tolerable

  • Like 1
Link to comment
Share on other sites

10 hours ago, Ralph Wiggum said:

Maybe. Weak split out west with some waves undercutting the pna ridge. When you pump the PNA like that with a CPF extension the cold will be there in the East. A well-timed phase would work. But I wouldn't kick a clipper out of the sack either.

Yeah, looking a bit more closely there is some separation with the pumped-up PNA ridge where you could sneak a shortwave through.  And I certainly wouldn't kick a clipper out of the sack either, LOL!

10 hours ago, mattie g said:

That’s a pretty damn cold look. If we can score a little snow as that settles in, then even it stays dry, we could have a couple weeks of a really wintry feel.

Definitely would be cold.  I was being a bit snarky with my "chilly" comment but it would be nice to have a couple of wintry feeling weeks (and not just cold/dry if we can manage it!).

Link to comment
Share on other sites

3 minutes ago, Weather Will said:

GFS Fantasy Storm WB 12Z for 2 weeks out.  Week of 16th as already indicated by many is one to watch.

8E22BAA4-28A6-4CAC-BE47-3011E7CD15DA.png

This is the one I was alerting everyone to yesterday with me traveling and specifically watching the time period because of flights etc.. been showing on accuweather no joke for like over a month. 

Link to comment
Share on other sites

4 hours ago, yoda said:

Per the latest zones... DCA is forecasted to reach highs around 30 on Tuesday.  That would be the first time in a while of a subfreezing high at DCA, yes?

Coldest max last winter at DCA was 31, with a few other days at 32; no days at or below 32 in winter 2020. The last time we spent a full day below 30 was early Feb 2019, so hopefully the cold air pans out the next few weeks!

Link to comment
Share on other sites

Just now, WinterFire said:

Coldest max last winter at DCA was 31, with a few other days at 32; no days at or below 32 in winter 2020. The last time we spent a full day below 30 was early Feb 2019, so hopefully the cold air pans out the next few weeks!

Yea getting cold has been an issue recently. 

Link to comment
Share on other sites

1 hour ago, mattie g said:

Op GFS has a ridiculously negative AO/NAO in the period around the 20th, and the GEFS height anomalies are impressive for 300 hours out.

GEFS with a big loud DT WOOF for D10 (MLK weekend). -AO/-NAO/+PNA/-EPO and a clear Miller A signal in the MSLP and precip. 

  • Like 10
  • Weenie 3
Link to comment
Share on other sites

The ensembles did a damn good job seeing the  frontal wave potential all the way back prior to Christmas for the first 10 days January. 

They highlighted the potential 2 weeks ago.

At that point we weren't sure which side of the boundary we'd be on but the pattern was nailed.

 

 

Link to comment
Share on other sites

23 hours ago, WxUSAF said:

Great thread from @griteateron where mid and late January may lead 

 

I’ve seen some posts by even people I respect a lot implying we return to a strongly -epo because “Nina” which confuses me because that’s not actually an automatic Nina thing. I posted this on Twitter yesterday but it’s every Nina winter mean h5 since 1980. 
04A70BB4-C505-42E8-898D-C8D075E7A4C0.png.332fbd9765cfa6de008fd321951e6b06.png

Yea the pac ridge is obvious and the +TNH and I’m not saying that’s a good look for snow here but it’s not necessarily a crazy -pna either. The NAM trough axis is actually more typically more east than it was. 
 

However, pointing out a “typical” Nina doesn’t necessarily translate to the current pac base state.  Also hidden within that are actually 2 different Nina states. When there is a poleward epo ridge it NAO blocking (later in winter!) we tend to see the trough more east in North America. When the pac ridge is flat and or. +NAO we tend to see it west and a -pna and big SE ridge. 
 

I do agree the pac jet retracts and we get a retrogression off the NAM pattern. That’s not bad, that will give us a nice window during prime climo mid January!   After that though I think depends on the high latitudes.  Assuming we revert to the recent pac base state if the epo ridge dissipates and the NAO stays positive then we probably torch Feb. we don’t do slightly warm anymore. Any pattern that favors a ridge in the east means crazy warm anomalies recently. No reason to expect different. But I do think we get another period of high latitude help. Recent trends say it’s unlikely the AO stays positive the rest of winter. I also think the happenings in the pac had a lot to do with the coming +NAO.  analog based pattern progression showed the NAO ridge was likely to retrograde to the pac side. It took longer than expected with the stalled mjo but the expected pattern progression seems to be resumed now. 
 

My best guess is we have to suffer a torch period at some point late Jan or Early Feb before things start to recycle up top. But I do think we get one more chance at snow after. Whether that’s Feb or we have to wait until March I don’t know. As grit eater says it’s all an educated guess at those ranges. But I’m sure it won’t be soon enough for some who start complaining about Sun angle by groundhogs day!  

  • Like 2
Link to comment
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
 Share

  • Recently Browsing   0 members

    • No registered users viewing this page.
×
×
  • Create New...