Jump to content
  • Member Statistics

    17,606
    Total Members
    7,904
    Most Online
    ArlyDude
    Newest Member
    ArlyDude
    Joined

December 20 - 21 Coastal Storm Threat


jm1220

Recommended Posts

  • Replies 429
  • Created
  • Last Reply

Somewhat different? Do you research this evolution is alot more conducive for a major snowstorm on the EC than this past week. We have a well established Rex block and well timed placed 50/50. The Miller A on the EURO just bombs away and has no p type issues to the coast. The GFS if you want to look at it is still a train wreck compared to the EURO. This couldnt be anymore different than last weeks storm my friend

Yet the airmass is still just as marginal as before. I think the interior could do pretty well but there'll be issues for the coast. We're still way too far out that the positioning of the Rex block and 50/50 low could shift, which may affect the track/intensity of the storm immensely. No matter how you slice it the threat remains marginal this far out. We'll see what happens in 2-3 days. 

Link to comment
Share on other sites

 as I said   the 12z  op   ECMWF  run  was  BS

 

attachicon.gif12ZEPS.jpg

 

Very glad to see you still posting here...the thought of some thoughtless poster causing you to throw up your hands and abandon our forum actually went through my mind at work today. 

You were the best poster at Ne.weather...to Wright...to Eastern...to AmWx...sounds like something out of a 1910's Cubs double play combo...and you might be the best damn met from Portland, Maine to Portland, Oregon...as Jack Torrance would say.

And just for reference...and they know me here...I hardly ever say anything  particularly good about anyone...so I'm no obsequious sycophant...but I give credit where credit is due.

Link to comment
Share on other sites

I understand and value your opinion above most everyone else's here, but I think you're letting yourself be married to indices a bit too much at this point. I am illustrated above how other features properly timed can create a de facto block that can lead to us getting a MECS. This is what you're seeing on the Euro and Euro ECS runs. So it is possible and the best model in the world is showing it time and time again. -NAO is the indexed way to achieve blocking, but blocking can be achieved through other means as well.

 

 

You articulated this very well.

 

I don't see how the 50/50 is going to be fast to leave. For one, the heights in Greenland aren't even that low. But more importantly, we have a really strong Rex Block which slows down the upstream flow and reinforces the strong negative height anomalies downstream (the 50/50 low). Plus, the Rex Block is so strong that its ridge is "bridging" with the ridging out ahead of the 50/50 low, creating a mini "trap". I honestly think that's enough to keep the 50/50 in a pretty good spot. 

 

It's almost like a feedback process. Strong Rex Block --> reinforces strong 50/50 low --> increases heights downstream --> creates ridge that bridges with the Rex Block and increases the overall blocking and doesn't allow the 50/50 low to escape --> slows down pattern --> keeps Rex Block from advancing too quickly --> reinforces 50/50 low ... 

 

One thing I do worry about is getting a good track (let's say just inside the BM) but the airmass is stale so the coastal plain has a snow to rain to snow scenario and <4" of snow. If we can get this over the BM like some of the Euro ensembles, we'll be fine. If we get this just inside the BM, we need a lot of dynamic cooling and access to as much of the stale cold air as possible -- not impossible, but definitely not easy. 

 

Could I end up being wrong? Sure. But I feel good about my opinion. 

 

The 18z GEFS shows the ridge bridging pretty well.

 

http://synoptic.envsci.rutgers.edu/dougsimo/GEFSNHEM500mbAnom18090.gif

 

GEFSNHEM500mbAnom18090.gif

Link to comment
Share on other sites

I understand and value your opinion above most everyone else's here, but I think you're letting yourself be married to indices a bit too much at this point. I have illustrated above how other features properly timed can create a de facto block that can lead to us getting a MECS. This is what you're seeing on the Euro and Euro ECS runs. So it is possible and the best model in the world is showing it time and time again. -NAO is the indexed way to achieve blocking, but blocking can be achieved through other means as well.

While I agree with you, it's also good to look at this in historical context. How many big snow storms have we've seen with the indicies the way there are currently? I don't have the statics in front of me, but I'd guess not many at all.

Link to comment
Share on other sites

While I agree with you, it's also good to look at this in historical context. How many big snow storms have we've seen with the indicies the way there are currently? I don't have the statics in front of me, but I'd guess not many at all.

The question is not how many KU level storms we've seen, but how many 6-12"ers.  Because those can get lost in the dustbin of history pretty quickly, but would still be a heck of a pre-Christmas hit.

Link to comment
Share on other sites

While I agree with you, it's also good to look at this in historical context. How many big snow storms have we've seen with the indicies the way there are currently? I don't have the statics in front of me, but I'd guess not many at all.

No question about it. However, history has been bucked many times over the past 10-15 years.

Link to comment
Share on other sites

The question is not how many KU level storms we've seen, but how many 6-12"ers. Because those can get lost in the dustbin of history pretty quickly, but would still be a heck of a pre-Christmas hit.

The February 2013 storm is the only one offhand I know of that dropped 1-2 foot or more amounts with bad indices in the AO/NAO etc, there have been many 6-12 type events though in bad patterns, 1/22/87 may have had at least a positive NAO, the AO may have been negative. Monster events have a hard time happening since the lack of a -NAO often means fast storm movement

Link to comment
Share on other sites

The February 2013 storm is the only one offhand I know of that dropped 1-2 foot or more amounts with bad indices in the AO/NAO etc, there have been many 6-12 type events though in bad patterns, 1/22/87 may have had at least a positive NAO, the AO may have been negative. Monster events have a hard time happening since the lack of a -NAO often means fast storm movement

really OT but why was it that the febuary storm worked out so well with the bad pattern...this was before i really got into weather and obviously it was probably my most memborable storm as its my profile picture

Link to comment
Share on other sites

its a sheared out and squashed disaster its a non event for pretty much everyone on the east coast rain or snow

but why would it be a mess? should it be showing something else? In my opiniong a mess is when it doesn't make sense or doesn't reflect an accurate weather data. I'm just trying to understand if the model is messed up and shouldn't be taken into account.

Link to comment
Share on other sites

but why would it be a mess? should it be showing something else? In my opiniong a mess is when it doesn't make sense or doesn't reflect an accurate weather data. I'm just trying to understand if the model is messed up and shouldn't be taken into account.

what it is showing as a storm is a disorganized squashed weak mess...i dont understand what u dont get about that

Link to comment
Share on other sites

but why would it be a mess? should it be showing something else? In my opiniong a mess is when it doesn't make sense or doesn't reflect an accurate weather data. I'm just trying to understand if the model is messed up and shouldn't be taken into account.

You're reaching dude, the storm is a sheared out mess on the GFS, quit being so technical. There have been a lot of straw men created here lately and pointless arguments ensue. Let's not continue that please.
Link to comment
Share on other sites

GGEM continues the trend with 00z. weaker and south

IMHO, the euro will be somewhat like its last run. I think this is trending to a disorganized mess southern slider.

The Ukie is also disorganized. Still a while to go. Many solutions ahead.The storm is going to depend on the ridge.

Link to comment
Share on other sites

the ridge out west is crappy on the ggem. also ukmet comes in weaker and south. So basically, UKMET/GGEM/GFS/GFS p vs EURO (who might fold tonight). DT would look bad as he was telling everyone to adjust travel plans for this weekend.

Yeah and it's still Monday..a lot can change and will change from now to the weekend.

Link to comment
Share on other sites

the ridge out west is crappy on the ggem. also ukmet comes in weaker and south. So basically, UKMET/GGEM/GFS/GFS p vs EURO (who might fold tonight). DT would look bad as he was telling everyone to adjust travel plans for this weekend.

The models could trend back to an amplified solution. Interesting week ahead.

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...