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January 2014 pattern discussion


CapturedNature

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NCEP re the cold signal during the next week ...

 

"WEATHER HIGHLIGHTS

~~~~~~~~~~~~~~~~~~

THE BIGGEST WEATHER STORY THIS PERIOD WILL BE THE COLD, WITH TWO SIGNIFICANT ARCTIC OUTBREAKS ON JANUARY 3-4 AND 5-8, WHICH COULD

BRING TEMPERATURES AS MUCH AS 20-30 DEGREES F BELOW NORMAL. EARLY ON, DUE TO LOW MID-LEVEL HEIGHTS/DEEP COLD AIR NEAR THE

US/CANADIAN BORDER UNDER THE SOUTHERN FRINGE OF THE POLAR VORTEX, LOWS IN THE -10S AND -20S ARE EXPECTED ACROSS SECTIONS OF NEW

ENGLAND, WITH PLACES AS FAR SOUTH AS THE OHIO VALLEY/WASHINGTON D.C. SEEING ONE OF THEIR COLDER DAYS OF THE PAST 20 YEARS. A

SECOND SHOT OF COLDNESS INVADES EASTERN MONTANA, MINNESOTA, AND WISCONSIN ON THE 5-7TH, WITH LOWS AT OR BELOW -20F FORECAST. AS

THE SURFACE HIGH WEDGES IN, MODERATE UPSLOPE SNOWS ARE EXPECTED ACROSS EAST-FACING SLOPES FROM MONTANA ACROSS NORTHEAST WYOMING.

IT WOULD NOT BE A SURPRISE IF NORMALLY COLDER LOCATIONS SUCH AS EMBARRASS DROP INTO THE -30S OR -40S F OVERNIGHT -- SIMILAR TO

YESTERDAY. THE OHIO VALLEY/MID-ATLANTIC STATES COULD SEE THEIR COLDEST DAY AROUND THE 8TH WITH RADIATIONAL COOLING BEING THE MAIN

CAUSE UNDER A 1040+ HPA ANTICYCLONE. TEMPERATURES ACROSS A LARGE SECTION OF THE NORTHERN UNITED STATES EAST OF THE ROCKIES ARE

EXPECTED TO REMAIN BELOW FREEZING ON THE 8TH. OUTSIDE OF NORTHERN MINNESOTA, IN GENERAL, THESE GLACIAL AIR MASSES APPEAR TO BE THE

COLDEST SINCE 1993/1994, DEPENDING ON YOUR LOCATION." 

NCEP says take a shot.

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Roundy MJO plots showing weakening in the Jan 1-10 period with some weak KW propagation over the IO/western MC. We then see redevelopment into the eastern IO after the 10th which sets off the warm up. MJO wave eventually moves towards the dateline around Jan 25th. RMM plots give a false weakening signal, when in reality we have a solid MJO wave in place, albeit not that strong.

 Pretty much. Looks like maybe a nasty 1 week stretch perhaps and then a redeveloping ridge near the West Coast.

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GEFS are starting to get uglier, but not nearly like the EC...but the EC has toned down the all out lengthy torch signal. Still mild, but perhaps not as long. Either way, before all this it looks like we may have a bit of overrunning snow and/or ice as the high slips off the coast and retreats. 

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Ur right -- the GFS -derived MJO had shown maturation into a more robust Phase 7, but since ... there has been some kind of GFS retrograde correction.  Now, that same mean has reverted back to a staunch Phase 6...

 

ensplume_full.gif

 

What ever that will mean for the pattern  ... the CDC WPO numbers are showing a positive teleconnector state in a week, and that "may" be a constructive wave interference for Phase 6 ...allow for its correlation on the pattern to be be expressed.   

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There's a lot of lingering cold after the big cold shot next week that we might support a wintry event at the end of next week...most guidance now has sort of a SWFE snow deal for us. Not very big, but perhaps a few inches as it goes south of us.

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Box said it didn't have ensemble support in Afd

 

 

I didn't read the AFD, so I won't comment on that, but several 06z GEFS members have it and the OP Euro has had it for a couple runs in a row now as well as the GGEM.

 

Its 6-7 days out, so its really nothing to get worked up over at this point. Its also not that strong of a system....we'll see if it shows up still in another day or two.

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I didn't read the AFD, so I won't comment on that, but several 06z GEFS members have it and the OP Euro has had it for a couple runs in a row now as well as the GGEM.

 

Its 6-7 days out, so its really nothing to get worked up over at this point. Its also not that strong of a system....we'll see if it shows up still in another day or two.

FYI

FRIDAY AND BEYOND...

MODELS ARE INDICATING ANOTHER LOW PRESSURE SYSTEM MOVING TOWARDS

NEW ENGLAND LATE THURSDAY INTO FRIDAY. HAVE VERY LOW CONFIDENCE IN

THIS PORTION OF THE FORECAST AS THIS IS NOT SUPPORTED BY THE

ENSEMBLES.

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I didn't read the AFD, so I won't comment on that, but several 06z GEFS members have it and the OP Euro has had it for a couple runs in a row now as well as the GGEM.

 

Its 6-7 days out, so its really nothing to get worked up over at this point. Its also not that strong of a system....we'll see if it shows up still in another day or two.

 

I like the idea of this system as a gate way to the warmer pattern. Seems like a classic scenario for a light waa snow event as the arctic departs

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When a jan pattern discussion thread has one page dating back almost 4 days in sne thread....u know major suckage ...is potentially on way

...or that people have been preoccupied with a borderline blizzard and extreme cold in the short term. But I get your point; nothing to really get excited about in the foreseeable future.

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...or that people have been preoccupied with a borderline blizzard and extreme cold in the short term. But I get your point; nothing to really get excited about in the foreseeable future.

I totally disagree, after the quick 12 hr warmup cutter I see lots of potential, pattern looks good.
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Qpf concerns mpm?

It's not a concern when it's reality, lol. The northern Greens are probably running the worst relative to normal of anyone in New England, however this area certainly isn't going to get any sympathy, lol. It's the same if like the Tug Hill was having a rough stretch, haha.

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It's not a concern when it's reality, lol. The northern Greens are probably running the worst relative to normal of anyone in New England, however this area certainly isn't going to get any sympathy, lol. It's the same if like the Tug Hill was having a rough stretch, haha.

Must be another dis as tah at MRG

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What a hideous looking day 9,10 on the Euro..After whatever threat comes along late next week..we have nothing for awhile

 

 

Halftime.  Stock up on items needed for the second half and get some work done.  5 day mostly above normal peroid is my call d9-14.  But once the pattern reloads we're off to the races imho.

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