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Southeast February Mid/Long Range Discussion II


Marion_NC_WX

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AO is forecasted to dramatically increase to positive....

http://www.cpc.ncep...._index/ao.shtml

PNA forecasted to go negative, all models agree on this.

http://www.cpc.ncep....k/pna/pna.shtml

And ALL models have been consistent this winter....lol Every model deviating left and right on solutions now. NCEP is calling for below average temps, while CPC is calling for above. The models can't stay consistent, so that negates them for the long range. Everything is up in the air now.

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AO is forecasted to dramatically increase to positive....

http://www.cpc.ncep...._index/ao.shtml

PNA forecasted to go negative, all models agree on this.

http://www.cpc.ncep....k/pna/pna.shtml

I suppose it's a difference of perspective, because I read The Ensemble Mean PNA Outlook as implying a neutral forecast at this point...just my opinion though, with a little optimist bias...

pnasprd2.jpg

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Are you talking about Global Warming, or just change of seasons?

Those points don't always get snow every year, or even every 5 years. Those points are also in the south, where it can be warm in the winter.

These threads remind me of the tropics threads. Every time a depression forms and strengthens people are always talking about it developing into some major hurricane. When any system weakens people act like it'll dissipate tomorrow.

And, here, when there is the chance at a GFS storm or fantasy storm at any range the hopes get up, and then when the models take away a storm the hopes get dashed to ribbons.

Let's face it, the earth is getting gradually warmer every year and this is going to happen more and more. We also can't really pick and choose what weather we'll have from day to day so you just have to accept it at what it is and say that is that. It might snow in the last part of February or early March. It might not. Whatever will be, will be.

You're welcome to discuss this in the appropriate forum since I lurk there a lot, but now you know where I stand on that.

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Ominous severe weather look on GFS day 8.

Yet another run of the GFS with a big potential system in this time frame.

That trough in the west at the end of the hi-res period definitely looks to have potential if it were to eject eastward as one consolidated piece of energy.

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From FFC this morning

LONG TERM /FRIDAY THROUGH TUESDAY/...

INCREASING CLOUDS FRIDAY NIGHT AHEAD OF THE NEXT TROUGH.

00Z ECMWF AND 00Z GFS SUGGEST POSSIBILITY FOR RAIN...WITH THE

SLIGHTEST POSSIBILITY FOR SOME SNOW MIXED IN. MODEL SOUNDINGS IN

NORTH GEORGIA SUGGEST AIR COLD ENOUGH TO SEE RAIN/SNOW SHOWERS

EARLY IN THE MORNING...BUT THE LOWER LEVELS ARE QUITE DRY AND THE

CHANCE OF FLAKES OR FLURRIES SURVIVING TO THE GROUND IS

QUESTIONABLE. IF EVAPORATIONAL COOLING IS EFFECTIVE...IT IS

POSSIBLE TO SEE LOWER LEVEL TEMPERATURES COOL AND A FEW FLURRIES

SURVIVE TO THE GROUND AT HIGHER ELEVATIONS. CONFIDENCE IS PRETTY

LOW FOR WINTRY PRECIPITATION AT ALL IN THE MORNING SINCE MODELS

DIVERGE ON TIMING SO GREATLY...WITH THE 00Z NAM HAVING THE FRONT

BACK IN MIDDLE TENNESSEE AT 12Z SATURDAY.

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I do believe this is the first time this winter I have seen MHX use the word snow in a AFD...from their overnight

HEIGHTS WILL LOWER SIGNIFICANTLY OVER THE WEEKEND AS THE POLAR

VORTEX SHIFTS SE IN PIECES. THIS WILL ALLOW A STRONGER ARCTIC

INTRUSION INTO EASTERN NC SUNDAY INTO MONDAY FOLLOWING THE PASSAGE

OF A STRONG COLD FRONT WITH LIMITED MOISTURE SATURDAY. WILL KEEP POPS

AT SLIGHT CHANCE FOR SATURDAY AND SATURDAY NIGHT. NOT OUT OF THE

QUESTION THAT A FEW FLURRIES/SNOW SHOWERS OCCUR SATURDAY EVENING

AS SOME MOISTURE LINGERS IN THE WAKE OF THE FRONTAL PASSAGE. HIGHS

ON SATURDAY WILL BE SEASONABLE 50-55 DEGREES. SUNDAY IS SHAPING UP

TO BE A WINDY/BREEZY AND VERY COLD DAY AS HIGHS STRUGGLE INTO THE

LOWER TO MIDDLE 40S.

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And I'll remind everyone again what HM posted a few days ago. Timing etc will come down to a few days in advance at best.

"Just a word of warning...for all of you who don't remember...last year at this time when the AAM state was changing etc. it lead to a significant model forecast degradation during that period (late Jan-early Feb). I suspect this is likely again, so expect, at the very least, wild shifts in timing in the day 2-5 period. "

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EE rule in effect... I think the 12z NAM has the right idea, supported by the 0z ECMWF to a certain extent. That is you primary forming off the SE coast around 72hrs. I don't see the southern stream energy coming into much play, except maybe juicing up the front as it is draped accross S FL. This is going to be a dominat northern stream setup, energy inbound induces cyclogenesis likely off the coast of NC and it is OTS thereafter. Sorry, I do not see this getting close enough to the coast to impact NE as JB thinks it will. Could be wrong though.

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I'm surprised no one is talking about the 00z Euro. 00Z Euro shows significant snowstorm for TX through mid-south in Day 6.

5cx3sl.jpg

501rw9.jpg

2v1rl8o.jpg

I don't trust this storm until we can see how things play out this weekend.

I'm hoping beyond hope that enough ridging builds into greenland that the pv rotates and drops a reinforcing shot of cold air in as this storm approaches, so its not a snow to rain solution (which is what is currently being modeled)

18z gfs had it too.... honestly, it looks driven almost entirely by evaporational cooling, causing a heavy burst of snow and accumulation, followed by rain.

I'll take it this year, as its better than nothing. But still annoying.

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Those points don't always get snow every year, or even every 5 years. Those points are also in the south, where it can be warm in the winter.

These threads remind me of the tropics threads. Every time a depression forms and strengthens people are always talking about it developing into some major hurricane. When any system weakens people act like it'll dissipate tomorrow.

And, here, when there is the chance at a GFS storm or fantasy storm at any range the hopes get up, and then when the models take away a storm the hopes get dashed to ribbons.

Let's face it, the earth is getting gradually warmer every year and this is going to happen more and more. We also can't really pick and choose what weather we'll have from day to day so you just have to accept it at what it is and say that is that. It might snow in the last part of February or early March. It might not. Whatever will be, will be.

This thread is not intended to be for any global warming debate. If you want to discuss it, take it to the climate forum.

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Already through 24 hours on the GFS it differs from the 0z Euro. The 0z Euro had some interaction between the energy affecting the MA today, which was strung out back to the west and from the piece of energy dropping in from the pacific NW. The 12z GFS is closer than the 0z run but not anything like the Euro.

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Man we have read the bold statement below a lot this winter..

Already through 24 hours on the GFS it differs from the 0z Euro. The 0z Euro had some interaction between the energy affecting the MA today, which was strung out back to the west and from the piece of energy dropping in from the pacific NW. The 12z GFS is closer than the 0z run but not anything like the Euro.

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Meh, 1-2 inch totals in a borderline event may not even be accumulating snow. But I'm sure it would be pretty if it verified.

1"-2" around here would be significant by Winter 2012 standards ^_^ .

I do think we'll have a week or so shot at something given all the energy - if guidance is close to being right.

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