Jump to content
  • Member Statistics

    17,608
    Total Members
    7,904
    Most Online
    Vesuvius
    Newest Member
    Vesuvius
    Joined

Feb 12-13 Sleet/Snow/ZR Event


JoshM

Recommended Posts

  • Replies 2.1k
  • Created
  • Last Reply

The 84 hour image shows lots of precipitation building in the northern gulf.  Perhaps round two?

 

Ztf5LdB.gif

 

Yeah that's interesting..  that's what models were keying on originally as our big event.. could pull up if it phases, but probably not a snow event then as the High slides off.

Link to comment
Share on other sites

No doubt man. We have a time period, now need to hone in on a good track. Then snow totals.

 

I will also take mine just a little south of you. Here is the accu total for the 00Z run . Still keeps the same idea on the same track.


That's the key thing. "Keeps the same idea on the same track." Being consistent!
Link to comment
Share on other sites

Out and about right now but it appears nam is slowly coking back to earth with first wave. Looks weaker? Less snow and qpf and a but further South. How is it looking 2m wise in ga Larry? Lookout? I see that there is moisture pooling at hr84? Which way is that going? Thanks y'all

Link to comment
Share on other sites

The 84 hour image shows lots of precipitation building in the northern gulf.  Perhaps round two?

 

Ztf5LdB.gif

 

 Yeah, the NAM is starting to get a clue about wave #2 (in agreement with the model consensus of many runs in a row) although it is further south with wave #2. Anyhow, I still think the NAM is out to lunch with wave #1 with the precip. coming in so fast and before much wedging gets established unlike the non-GFS model consensus for several runs in a row. I expect the NAM to move toward the Euro and company by Monday. I'd be quite surprised if it ends up verifying the closest with either wave #1 or #2 as it is a not so good model mainly on its own (although the 18Z RGEM may have been similar). We'll see. Strange things do happen. ;)

Link to comment
Share on other sites

Out and about right now but it appears nam is slowly coking back to earth with first wave. Looks weaker? Less snow and qpf and a but further South. How is it looking 2m wise in ga Larry? Lookout? I see that there is moisture pooling at hr84? Which way is that going? Thanks y'all

 

Its hard to extrapolate the 84 hour nam but looking at H5 and H7 trough axis eventually ots.

nam_namer_084_500_vort_ht.gif

nam_namer_084_700_rh_ht.gif

Link to comment
Share on other sites

0z nam looks like it brings a ton of precip going from rain to snow it appears to me in extreme north Georgia. Atlanta is perilously close to getting in on the action. 2m temps don't look good for GA though.

 

 Marietta/Deltadog,

  Due to a lack of good wedging getting established in time for much of the precip. due to the precip. coming in more quickly than the model consensus, it looks to me like Atlanta would likely get relatively little wintry precip. from this 1st wave as modeled on the 0Z NAM based on 850/925 mb temp.'s. I don't have the two meter temp.'s. Also, it looks like the 2nd wave's precip. would likely stay south of ATL if this were extrapolated. meaning not much wintry precip. from the two waves. Keep in mind that the NAM is mainly on its own in these regards, and it isn't all that good of a model that far out in time. Also, it tends to overdo qpf. Therefore, I expect it to change quite a bit over the next 1-2 days. I do see one fairly sig. change vs. the 18Z NAM: the 2nd wave is much more pronounced at 78 vs. 84 on the 18Z, which is starting to look closer to the other models.

Link to comment
Share on other sites

NAM looks more reasonable with it lowering the QPF amounts this run given that everything is rather weak with this initial wave.  500mb wave amplitude and vort max are weak.  850mb low really doesn't get its act together until it reaches N GA / E TN on this run then it translates E / ESE across N SC into SE NC.  You need to see a solid closed 850mb low with a stout southerly / southeasterly fetch to get heavy overrunning snow.  To me, this looks more like a light to moderate snow for areas in NC that stay cold enough.

Link to comment
Share on other sites

One thing about the NAM is it seems to keep the sleet at bay.

 

Yeah, plenty of deep cold air.  Looking at the 500mb vorticity maps, it's a big mess.  The initial overrunning wave was a bit more disorganized with its energy to attract the polar s/w to phase with it to generate the monster snow outputs the 12z and 18z had.  Because of this, the s/w back over the west has room to amplify. This is still a tricky setup.

Link to comment
Share on other sites

Finally...I feel we have a BONAFIDE winter system to work with. So.ething we have not seen in years. I feel we are now moving to the process of trying to determine of this will be 3-4" or one for the record books, where we reach 12+ x in a lot of areas. Lastly, we have the 2nd wave to contend with, which is totally uncertain. Last but not least...if this probable winter storm has any changes in store for the areas showing major snow, then it will be more of a MIXED BAG variety and we will have to worry more about the IP/zr issues...

Link to comment
Share on other sites

Anyone mention the 12z Euro ensembles for RDU et all? Wow they are simply incredible. I've never seen more 9" or more members on the ensembles this far south, ever. This is the kind of stuff you see up north.

 

I count 21 or so of the 51 members with 8-9"

Only 2 members with less than 2"

 

For this storm, the mean is close to 7"

 

Sorry if it's been mentioned already before, I've been gone all day, just had to mention it.

Edit: didn't even look at CLT...holy moly, even better. mean is 8"+

Link to comment
Share on other sites

Anyone mention the 12z Euro ensembles for RDU et all? Wow they are simply incredible. I've never seen more 9" or more members on the ensembles this far south, ever. This is the kind of stuff you see up north.

 

I count 21 or so of the 51 members with 8-9"

Only 2 members with less than 2"

 

For this storm, the mean is close to 7"

 

Sorry if it's been mentioned already before, I've been gone all day, just had to mention it.

 

Yeah, I posted some totals for various cities across the state earlier.  They were pretty incredible.  You were basically looking at 6-9" for much of the state and into upstate SC.

 

Roughly half of the members showed 9"+ here and quite a bit more were in the 6-9" range for a mean of 8.25".  It was pretty incredible and the best EPS run yet for any of us.  :pimp:

Link to comment
Share on other sites

You can't get zr with a temp of 34 or 35. If this comes in Monday afternoon , I'd be willing to bet temps are in the low 40s NGa- upstate and around 50 in CAE

 

Uhm?.. ... Okay.  Tell that to 51/51 Euro members..

 

The Euro will win out this time (as always) along with the EPS.

 

 

Ulyiuxr.png

Link to comment
Share on other sites

Uhm?.. ... Okay.  Tell that to 51/51 Euro members..

 

The Euro will win out this time (as always) along with the EPS.

 

 

Ulyiuxr.png

Shawn,

Mack was saying if it comes in Monday afternoon, when it wouldn't be as cold. The EPS and Euro op. don't bring in the bulk of it til Tuesday, when it is colder.

Link to comment
Share on other sites

Shawn,

Mack was saying if it comes in Monday afternoon, when it wouldn't be as cold. The EPS and Euro op. don't bring in the bulk of it til Tuesday, when it is colder.

 

Yeah I know.  I dont think itll be quite that fast though.  Sorry Mack & Larry. <3

 

I think the higher res/better initilization of the euro will end up doing better at timing here.

 

The Euro + NAM (as michelle says alot) blend.. works well through here.  I still think even with a faster NAM (possibly even w/ the overruning) and then a slower Euro compared.. a middle of the road would bring it around midnight Monday night/Tues morning or a bit later.

Link to comment
Share on other sites

Archived

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

Guest
This topic is now closed to further replies.
  • Recently Browsing   0 members

    • No registered users viewing this page.

×
×
  • Create New...