Jump to content
  • Member Statistics

    17,609
    Total Members
    7,904
    Most Online
    NH8550
    Newest Member
    NH8550
    Joined

Weekend Threat 12/14-12/15


IsentropicLift

Recommended Posts

  • Replies 1.1k
  • Created
  • Last Reply

This has precip well offshore with showery weather over land written all over it, after the initial burst of snow from the WAA.

 

Yeah, I am not a big fan of those big maxes to our east. Hopefully we can squeak out 1-3 or 2-4 before the 

precip goes to light rain or freezing rain.

Link to comment
Share on other sites

snow ratios are not necessarily dictated by surface temperatures

Well. .. Yes and no. Look what happened yesterday. Mid levels were fantastic but surface was questionable and ratios that people were saying at least 15:1 were likely even less than 10:1. Very very hard even in ideal conditions to break 10:1 on the coastal plain.

Link to comment
Share on other sites

Well. .. Yes and no. Look what happened yesterday. Mid levels were fantastic but surface was questionable and ratios that people were saying at least 15:1. Very very hard even in ideal conditions to break 10:1 on the coastal plain.

One thing that I think is different is the surface temps should be in the 20's when the snow arrives..it was in the mid 30's yesterday

Link to comment
Share on other sites

Well. .. Yes and no. Look what happened yesterday. Mid levels were fantastic but surface was questionable and ratios that people were saying at least 15:1 were likely even less than 10:1. Very very hard even in ideal conditions to break 10:1 on the coastal plain.

The ground and boundary layer were warm yesterday, which melted and compacted the snow. We would have had another 1-2" if temps were in the 20s instead like they will be as this moves in.

Link to comment
Share on other sites

Well. .. Yes and no. Look what happened yesterday. Mid levels were fantastic but surface was questionable and ratios that people were saying at least 15:1 were likely even less than 10:1. Very very hard even in ideal conditions to break 10:1 on the coastal plain.

 

If the entire column is below freezing, near-freezing surface temperatures won't affect snow ratios.  There are still other factors that could (such as warm ground), but low density snow can accumulate with surface temps near freezing.

Link to comment
Share on other sites

I generally like overrunning type snows for us which approach from the W-SW more than ones which approach from the SW or S, not sure why but they seem to generally perform better, 2/2008, 2/8/94, and 2/18/00 are a few examples of ones which approach more from the W-SW.

 

Dont the app mountains in PA have a knack for drying out the precip? Something to do with downsloping?....(im asking)

Link to comment
Share on other sites

twitter? he hasnt posted on twitter since november.  ???

 

on facebook he says, "euro starts as snow in Philly all of NJ NYC Long island coastal CT - RI/ se mass.. but it does change over to NON snow...

I haven't been on twitter today, but he has been posting on his 2nd twitter account lately. He sometimes posts on facebook under his 2nd facebook account too. I believe he goes by dtvaweatherman or something like that. Sorry I'm at work and don't have access to those sites right now to check on his exact name.  EDIT. JUST SAW YOUR POST ROSSI. THANKS. I WAS RIGHT! HA HA HA

Link to comment
Share on other sites

Ratios  are not determined by surface temps  check the 850`s  minus 2- 4 - thats 10 to 1 , Come on ANTH  

 

850s are -10.9 as the precip enters NYC and the surface temp is 19 degrees.

And 100% surface temp matters for snow ratio.

 

Yesterday's event is a PRIME example. The mid and upper levels suupported high snow ratios. Yet the surface was a bit too warm and the snow ratios were piss poor almost everywhere. The snow growth regions supported 12 to 15 to 1 ratios yesterday, even in the city. But the surface was 33-35 degrees and kept ratios to a PUTRID 4 to 1 in the city. If the surface was 31 or below, yesterday would have been a 4"-6" event.

 

Anytime I hear that surface temp doesn't matter with ratios, I want to puke. They 100% do. Especially in urban areas.

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...