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January 2023 Obs/Discussion


Torch Tiger
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6 minutes ago, 40/70 Benchmark said:

Those 10:1 clowns are awful in SWFE...need the NARCAN

Yeah sometimes Kuchie is better. But it’s rarely the number shown that’s important, just the overall vibe of the map.

I just like using them with the implied idea that it isn’t the actual snowfall value on the map that’s important, just that it’s the amount of QPF expected to fall as snow. I just move the decimal over… says 7.0”, then 0.70” water will come as snow, figure out your own ratio from there.  Call it 5-7” or 4-6”.

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1 hour ago, powderfreak said:

Yeah sometimes Kuchie is better. But it’s rarely the number shown that’s important, just the overall vibe of the map.

I just like using them with the implied idea that it isn’t the actual snowfall value on the map that’s important, just that it’s the amount of QPF expected to fall as snow. I just move the decimal over… says 7.0”, then 0.70” water will come as snow, figure out your own ratio from there.  Call it 5-7” or 4-6”.

Kuchie is sometimes better for a deformation zone...not a situation in which thermals are an issue. That is the NARCAN specialty.

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5 minutes ago, Snowcrazed71 said:

Well.. the word " PATTERN CHANGE " came out of my meteorologist mouth this morning on the news starting the end of next week. I totally respect the crew it WVIT, so for them to use that word, they must see something pretty solid.

Fingers crossed

You can see it in the ensembles, might be a good 1-2 week period for us. End of January, beginning of February. But it definitely looks like we may need some luck mixed in there. Otherwise wise the pattern change is nothing more than another way to fork us. At least in our region. Hope I'm wrong...

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6 minutes ago, Snowcrazed71 said:

Well.. the word " PATTERN CHANGE " came out of my meteorologist mouth this morning on the news starting the end of next week. I totally respect the crew it WVIT, so for them to use that word, they must see something pretty solid.

Fingers crossed

Nothing that everyone else can’t see.  We’ve been here before, hopefully cold bleeds east.  I do think CNE and NNE clean up. Just need some luck on our side.   Better cross as many fingers as possible.  

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8 hours ago, 40/70 Benchmark said:

Kuchie is sometimes better for a deformation zone...not a situation in which thermals are an issue. That is the NARCAN specialty.

If you can find a snow depth change map that can be a more realistic representation of what falls when it's mixy. 

WeatherBell has it for the NAM, GFS, and Euro. All show a 10 inch increase in the max swath (which coincidentally is my favorite number to cap SWFEs at). This is a bit of a hybrid system though, as the dry slot looks like it never punches all the way northeast. But the Euro has the swath from RUT to DAW, GFS a little north, NAM closer to the MA border.

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1 minute ago, OceanStWx said:

If you can find a snow depth change map that can be a more realistic representation of what falls when it's mixy. 

WeatherBell has it for the NAM, GFS, and Euro. All show a 10 inch increase in the max swath (which coincidentally is my favorite number to cap SWFEs at). This is a bit of a hybrid system though, as the dry slot looks like it never punches all the way northeast. But the Euro has the swath from RUT to DAW, GFS a little north, NAM closer to the MA border.

Yep.

Agreed.

Good point about the max depth change map....never used it.

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55 minutes ago, TalcottWx said:

I say 12-24" Methuen. Power of positivity.

I feel like your "too early for amounts" statement is really just some cookie-cutter, general rhetoric in attempt to mask the fact that you haven't really looked into it much. Sorry, but a 2-5" range for a SWFE N of the pike is a pretty reasonable place to start, dude.

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The GYX long term lays it out well

NG TERM /WEDNESDAY NIGHT THROUGH MONDAY/...
500 MB pattern continues with split flow and very blocky, weak
flow through the end of the week at least. Some changes possible
this weekend as possible strong E Pacific ridging develops,
setting up a stronger +PNA pattern, followed by a developing
block over the Atlantic early next week and a possible -NAO.
Following the Euro this would portend more winter-like
conditions. However, the previous models run, showed nothing of
this sort, so confidence is low.

Main event in the extended will be the coastal low developing to
our S late Thu and quickly tracking E across the Gulf of ME.
500 MB closed low over the N Plains on Thur moves quickly to the
E Thu night and Fri and does manage to some brief phasing and
become weakly negatively tilted, which should produce a burst of
decent dynamic and mid-level thermal forcing Thu night, with a
decent burst of precip /mainly snow/ Thu night. Highest QPF, for
now, is over southern NH, but it may start as rain here Thu
afternoon before changing to snow. Also, warm antecedent temps,
may limit accums early on as well. However, snowfall rates could
be intense for a few hours overnight, and this may help
overcome some of the warm ground melting. Several inches look
possible, with the bulk of the snow falling Thu night. Lows Thu
night will range from around 20 in the N to around 30 in the S.
On Friday, the sfc low will quickly move into Nova Scotia, but
weaken sfc low associated with upper level low will move across
proving some light snow, especially in the morning, with Highs
generally in the up[per 20s to low to mid 30s in the S.

SHSN possible in the mtns Fri night, but cold aid air behind
this system is limited and will last for a day as Sat highs push
back into the upper 20s to mid 30s, but Sunday they will be in
the 30s to around 40 in southern NH. There is a chance for some
SN Sunday night into Monday, but latest Euro and GFS are very
different in that period, so Chc POPs are quite reasonable attm.
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