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2/19 East Coast Winter Storm Threat


OKpowdah

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No point chest thumping just yet. We've been down this road before. I'm not getting suckered in. If no other model is interested, neither should we be.

I don't think we have... 2 consecutive (not off-hour) runs of the GFS showing a major snowstorm if not blizzard for SNE... never before in Winter 2011-12.

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UK isn't going to be that far off from the GFS through the 72/96 hour period. Low is in about the same spot, 1005mb off the LA/TX coast at 72 hours.

Aloft the GFS is definitely a bit better, UK isn't going to run it as far north I don't believe, but it's going to be a half a continent closer than the GGEM.

yeah jconsor posted the maps a few posts earlier...it bombs after it moves off the va capes but tough to tell where exactly it goes given the 24 hr charts

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yeah jconsor posted the maps a few posts earlier...it bombs after it moves off the va capes but tough to tell where exactly it goes given the 24 hr charts

I'm on the PSU site...but long story short through even 48 it's clear it's picking up on the features the GFS was as well.

Euro will follow suit I suspect, and it's game on.

we'll end up getting rain, but that's fine too, we need the moisture :)

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I don't think we have... 2 consecutive (not off-hour) runs of the GFS showing a major snowstorm if not blizzard for SNE... never before in Winter 2011-12.

Well if you want to split hairs sure but what's the point of getting all giddy about one model showing a blizzard. This threat needs more model support. Just MHO.

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I'm on the PSU site...but long story short through even 48 it's clear it's picking up on the features the GFS was as well.

Euro will follow suit I suspect, and it's game on.

we'll end up getting rain, but that's fine too, we need the moisture :)

If the ukie came around, The euro should as well

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gfs ens mean is more juiced than the 06z run was...my guess is there a handful of members closer to the op and still some whiffs in there based on mean SLP center passing pretty far south of the BM but some good precip over SNE

Ensembles look like about 50NM or so se of the BM.

12z GEFS looks to be a scraper for SNE

Expected at this time frame, no?

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If the ukie came around, The euro should as well

Probably to some extent. The RGEM is better than the GGEM, but is still not seeing one of the systems involved. Would be pretty unusual for it to be totally missing it unless it's tracing back to a point where it's prone to init errors...high mountains or just off the coast. Too lazy too look.

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Clearly they hadn't viewed the UK which now agrees with the GFS.

THE GFS APPEARS TO HAVE WORSE INITIALIZATION OF THE TROUGH'S

PLACEMENT OVER BRITISH COLUMBIA AND NUNAVUT THIS MORNING COMPARED

TO THE NAM/ECMWF. MEANWHILE...THE GFS IS MOST AGGRESSIVE IN

ALLOWING AN UPSTREAM PERTURBATION CURRENTLY OVER THE PACIFIC TO

CUT THROUGH THE SHORTWAVE RIDGE OVER THE CANADIAN ROCKIES ON

THURSDAY...WHICH THEN PHASES WITH THE NORTHERN STREAM AND SLOWS

THE ENTIRE GFS SOLUTION. THE COMBINATION OF WORSE INITIALIZATION

AND QUESTIONABLE AND EVEN SUSPICIOUS PHASING OF THE SEPARATE

STREAMS IS SUFFICIENT TO DISCARD THE GFS PARTICULARLY LATE IN THE

PERIOD. AMONG THE REMAINING SOLUTIONS...THE NAM BECOMES SLIGHTLY

FASTER THAN THE 00Z ECMWF/UKMET/CANADIAN WHICH ARE ALL IN

AGREEMENT. GIVEN THE NARROWER WINDOW FOR DATA ASSIMILATION IN THE

NAM VERSUS THE OTHER REMAINING SOLUTIONS...ALONG WITH THE

CLUSTERING OF THE NON-NCEP MEMBERS...THE PREFERENCE IS FOR THE

ECMWF.

CONFIDENCE: LESS THAN AVERAGE

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