Jump to content
  • Member Statistics

    17,586
    Total Members
    7,904
    Most Online
    LopezElliana
    Newest Member
    LopezElliana
    Joined

December Forecast Discussion


Wow

Recommended Posts

  • Replies 1.8k
  • Created
  • Last Reply

Guys, it's >240 hours. Fun to dream about, but not even close to reality.

Yeah, we know...that doesn't need to be said. What makes this storm interesting is because we're getting into a pretty active pattern and the setup just looks right for this storm. Will it change? You bet. But it has been consistent on modeling and it is definitely something to continue to watch.

Link to comment
Share on other sites

Yeah, we know...that doesn't need to be said. What makes this storm interesting is because we're getting into a pretty active pattern and the setup just looks right for this storm. Will it change? You bet. But it has been consistent on modeling and it is definitely something to continue to watch.

I agree. We want to see the Euro in the LR start to follow suit. Last night wasn't spectacular in the LR. Either way there is reason to at least be somewhat excited even if it is 300 hours away given what we had last winter.

Link to comment
Share on other sites

Yeah, we know...that doesn't need to be said. What makes this storm interesting is because we're getting into a pretty active pattern and the setup just looks right for this storm. Will it change? You bet. But it has been consistent on modeling and it is definitely something to continue to watch.

The ensembles hint at this as well. Maybe it will be the one.

12zgfsensembles500mbHeightAnomalyNA312.gif

Link to comment
Share on other sites

..THE FORECAST FOR GRANDFATHER MOUNTAIN NC AT 5946 FT...

...HIGH WIND WARNING IN EFFECT FROM 7 PM THIS EVENING TO NOON EST

SATURDAY...

...WINTER WEATHER ADVISORY IN EFFECT FROM MIDNIGHT TONIGHT TO

MIDNIGHT EST FRIDAY NIGHT...

.TODAY...CLOUDY. SNOW SHOWERS IN THE MORNING. RAIN SHOWERS THROUGH

THE DAY. IN THE CLOUDS AT TIMES DURING THE AFTERNOON. HIGHS IN THE

LOWER 40S. SOUTH WINDS 40 TO 45 MPH...INCREASING TO 50 TO 55 MPH IN

THE AFTERNOON. GUSTS UP TO 78 MPH.

.TONIGHT...CLOUDY. RAIN SHOWERS UNTIL MIDNIGHT. SNOW SHOWERS LIKELY

THROUGH THE NIGHT. PATCHY FOG AFTER MIDNIGHT. IN THE CLOUDS AT TIMES

DURING THE EVENING. LOWS IN THE MID TEENS. WEST WINDS 40 TO 45 MPH...

INCREASING TO 45 TO 50 MPH AFTER MIDNIGHT. GUSTS UP TO 74 MPH. WIND

CHILL VALUES IN THE SINGLE DIGITS BELOW ZERO AFTER MIDNIGHT.

.FRIDAY...CLOUDY. PATCHY FOG IN THE MORNING. SNOW SHOWERS LIKELY

THROUGH THE DAY. HIGHS IN THE UPPER TEENS. WEST WINDS 50 TO 55 MPH.

GUSTS UP TO 88 MPH. WIND CHILL VALUES IN THE SINGLE DIGITS BELOW

ZERO.

Link to comment
Share on other sites

While the GFS is probably too far south on both the Christmas week storm and the following, believe the trend is important. It tries to dig the Eastern CONUS trough a little more with each system. I'm guessing the Christmas week storm ejects too far north again. Lead shortwave right before Christmas will probably slaughter any CAD chance in NC. The next one might actually track through the Tennessee Valley but that is still not going to get the job done. If the thing does not go blasting up the Apps, but more west to east, perhaps CAD or at least in situ over there. Nah that far out I should punt CAD talk.

Let's talk big picture that far out. GFS retrogrades the AK trough back into the Aleutians and Bering Sea which is a plus. It shows in the 11-15 a decent Alaska ridge. We'll see. If it happens we finally stop getting those troughs into Calif. That MUST end in order to get rid of the downstream, but subtle and flat, upper ridge that's been camping out over the Southeast and acting like the Great Wall of something. GFS tries to drop a PV out of Hudson Bay. All this will probably evolve slower than forecast, iff it even does happen.

It is an approximate repeat of November, so plenty believable. This is not last winter. We're actually doing the usual 4-6 weeks on and 4-6 weeks off like a usual winter, total cycle about 10-12 weeks. Keep your fingers crossed. :ski:

Link to comment
Share on other sites

While the GFS is probably too far south on both the Christmas week storm and the following, believe the trend is important. It tries to dig the Eastern CONUS trough a little more with each system. I'm guessing the Christmas week storm ejects too far north again. Lead shortwave right before Christmas will probably slaughter any CAD chance in NC. The next one might actually track through the Tennessee Valley but that is still not going to get the job done. If the thing does not go blasting up the Apps, but more west to east, perhaps CAD or at least in situ over there. Nah that far out I should punt CAD talk.

Let's talk big picture that far out. GFS retrogrades the AK trough back into the Aleutians and Bering Sea which is a plus. It shows in the 11-15 a decent Alaska ridge. We'll see. If it happens we finally stop getting those troughs into Calif. That MUST end in order to get rid of the downstream, but subtle and flat, upper ridge that's been camping out over the Southeast and acting like the Great Wall of something. GFS tries to drop a PV out of Hudson Bay. All this will probably evolve slower than forecast, iff it even does happen.

It is an approximate repeat of November, so plenty believable. This is not last winter. We're actually doing the usual 4-6 weeks on and 4-6 weeks off like a usual winter, total cycle about 10-12 weeks. Keep your fingers crossed. :ski:

So your thinking this might actually time out well to get a 4-6 window in the heart of Jan/Feb....

Link to comment
Share on other sites

Guys, it's >240 hours. Fun to dream about, but not even close to reality.

Very well put. The details are only of entertainment value. However, when looking at the general pattern, keep in mind that the last four runs of the GFS have a somewhat similar scenario of a Pacific storm diving SSE in the eastern Pacific in about a week and subsequently turning eastward, picking up lots of Gulf moisture while moving into the SE ~1/1 along the southern boundary of Arctic air, which is forced down by impressive blocking to the north. So, the general idea of some sort of SE winter storm threat for around 1/1 may already have merit. Also helping: the just released 12Z GEFS concurs with this general idea with lots of Pacific/Gulf moisture moving eastward across the SE along the southern boundary of Arctic air near 1/1. Even it has ~1" of QPF falling within a day or two of 1/1 for many areas. The last four GEFS means have something similar.

Speaking of dreaming, the 12Z GFS puts down 0.87" of liquid equivalent in the form of pure snow at KATL 1/1-2! Once the snow starts early on 1/1, KATL falls to below 32 and pretty much doesn't get back above it through the end of the run (7 AM on 1/5)...96 straight subfreezing hours. Over a deep snowcover, it gets down to 12 F 1/3 AM! A second small snow falls early on 1/5 due to a 2nd/weaker Miller A! This is the winter wx dream of a lifetime for me. Who knows when this good of a dream will come along again?

Link to comment
Share on other sites

I don't know PB, I see more like 3 of the 12 with sfc low along the coast and 540 thickness in the general vicinity of the TN/NC line.

I counted the following, you also had to look at hr156, didn't really care about thicknesses, just thought for the NC mountains and VA would be curious.

C000

P001

P005

P002

P009

P010

Link to comment
Share on other sites

Thanks, Jon! For some reason I've never been able to get Raleigh's loops to run for me. Probably Java related. Guess, I'll stick with what I've got, since the good stuff never comes until way out in the "it won't happen as depicted" range, lol. I like that the Gfs long range is now showing some fun storms. So unlike last year. I predicted zrain the first week, or so, of Jan. in the guess the storm thread, so I'm not out of the running yet, Don't much think it will be before Xmas down here, from the last few days runs. Tony

Link to comment
Share on other sites

Where do you see the Euro maps as they are running ?

on a pay site

HP not nearly as strong as depicted on the 12z GFS (which wasn't that strong to begin with).. it's basically non-existent. But a lot closer to a winter storm for some of us.

Link to comment
Share on other sites

Archived

This topic is now archived and is closed to further replies.

  • Recently Browsing   0 members

    • No registered users viewing this page.

×
×
  • Create New...