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Its cold enough when do we snow?


Ginx snewx

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HPC was so optimistic yesterday, talking about High at the southern tip of Greenland, which would surely lead to a more southerly solution. Others have been talking about a block over Iceland or even more east would would allow for a more inland route. I see the prelim progs from HPC have a deep low between Ray's fanny and mine (don't go there). I don't see a high to the north and I don't know how to look at the hemispheric H5 map, but where is the block? It would seem ultimately that would nudge the storm in one direction or another. For me I am thinking snow to sleet/freezing rain, maybe rain or just a dry slot for a bit, and then some back end snow? Does this make sense?

HPC yesterday's final:

EXTENDED FORECAST DISCUSSION

NWS HYDROMETEOROLOGICAL PREDICTION CENTER CAMP SPRINGS MD

229 PM EST MON DEC 06 2010

VALID 12Z THU DEC 09 2010 - 12Z MON DEC 13 2010

MEDIUM RANGE GUIDANCE CONSENSUS SHOWS THAT THE MEAN LONGWAVE

PATTERN CONTINUES TO BE DOMINATED BY LARGE CENTERS OF PERSISTENT

EXTREME POSITIVE ANOMALIES: ONE OVER THE WRN ALEUTIANS...THE OTHER

E OF THE SRN TIP OF GREENLAND. THIS STRONG NEGATIVE NAO PATTERN IS

COMPATIBLE WITH A VERY DEEP TROF ALONG THE E COAST...AND WELL

BELOW NORMAL TEMPS OVER MOST OF THE ERN CONUS. THE PATTERN

UPSTREAM OVER THE CONUS IS ALSO SUPPORTIVE OF A DEEP E COAST TROF.

THE HUGE RIDGE OVER THE ALEUTIANS SUPPORTS A DEEP TROF/RIDGE ALONG

145W AND 110W....RESPECTIVELY. THIS PATTERN...IN TURN...ALSO

SUPPORTS THE MAJOR E COAST TROF. THOUGH IN AGREEMENT

OVERALL...00Z/12Z GUIDANCE STILL SHOWED SOME DIFFS WITH RESPECT TO

THE VIGOROUS LOW PRESSURE EXPECTED TO AFFECT THE ERN HALF OF THE

CONUS IN RESPONSE TO THE AMPLIFYING TROF ALOFT. FOR EXAMPLE...THE

00Z DETERMINISTIC ECMWF SHOWED A DAY 5-7/SAT-MON SFC TRACK THAT

TRENDED TOWARDS THE NW SIDE OF THE MODEL/ENSEMBLE SPREAD.

HOWEVER...ENSEMBLE SPAGHETTI PLOTS...TELECONNECTIONS...AND A

FAVORABLE UPSTREAM LONGWAVE PATTERN NOW SEEM TO POINT INCREASINGLY

TOWARDS A MAJOR STORM FOR THE E COAST STATES SHAPING UP NEXT

WEEKEND.

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Well that run of the GFS sucked. lol

The good news for out here is that our intial in ch of snow is only washed away by .5" of rain. It could be washed by 2.5" (hello, Maine).

Lol...whats the difference. We all have brown grass showing at the end of that storm.

Our hope in the interior is a sfc secondary reflection/triple point develops and we get an extended period of ice after hopefully a bit of snow at the onset.

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Lol...whats the difference. We all have brown grass showing at the end of that storm.

Our hope in the interior is a sfc secondary reflection/triple point develops and we get an extended period of ice after hopefully a bit of snow at the onset.

That is my question Will, Why are we not seeing a secondary develop off of the coast?

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That is my question Will, Why are we not seeing a secondary develop off of the coast?

The dynamics are so strong that the pressure gets concentrated into the interior...you can seehow a secondary reflection wants to develop initially at about 120-126 hours S of NE, but it just gets overwhelmed with the monster dynamics going west of here. We'll have to wait and see as we get closer if it continues to want to do that...if there is any excuse for a secondary/triple point low to develop, it probably will. It won't help out the coastal locations, but it would potentially mean some prolonged icing in the interior.

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I don't mean a Euro system verbatim. What I mean is a cold and stormy look to the pattern. That's all I want basically (plus 35 inches of snow on any given day...).

Yeah it does look like we'll have some systems passing nearby and with that block, you always have a shot. As we've seen however, that doesn't always mean snow. It's definitely a nice piece of the puzzle to have, but we have to get the timing right. I would rather have a weaker block which perhaps would allow for colder weather to move in, along with miller b chances. I agree it does have a stormy look to it, so there will be chances coming up. I just hope one works out.

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The dynamics are so strong that the pressure gets concentrated into the interior...you can seehow a secondary reflection wants to develop initially at about 120-126 hours S of NE, but it just gets overwhelmed with the monster dynamics going west of here. We'll have to wait and see as we get closer if it continues to want to do that...if there is any excuse for a secondary/triple point low to develop, it probably will. It won't help out the coastal locations, but it would potentially mean some prolonged icing in the interior.

Would a later phase with the PV in canada help out our cause to get this vort to not dig as much in the lower ohio vally?

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Will doesn't the Ukie have some cold or SE bias in coastals?

I dunno about a SE bias, not at this time range anyway that I'm aware of. To me, it has an "outlier bias" in the medium range despite its overall decent skill. But sometimes its right when with its outlier solutions...its just difficult to know when to trust it.

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GFS ensembles are slower than 00z, but came east. The mean takes the low from near Philly ene to near Chatham.

That's significantly east of the 00z ensemble mean. So I guess that is good news...but not sure I'll really feel good about it unless the Euro jumps east as well.

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Interior snow to ice back to snow

Coastal snow to rain back to snow(especially western coastal new england)

Friday 1-3 from I84 north, tr-1 along the coast

Very wintery period coming up for interior new england followed by ridiculous cold and a cople swfe for the xmas new years period, great stuff on the horizon!

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