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DT, Henry M, Steve D, JB Talk


TheTrials

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DT

WATCH FEB 11 -12 2012 ... IF there is going to be a BIG one on the East coast this winter ..a M.E.C.S -- MAJOR EAST COAST SNOWSTORM --event it could be around FEB 11 or so . By that time

1)the deep cold arctic air will be in place...

2) the NEW N American PV will be in place...

3) the AO will likely be strongly negative

4) and the NAO will be either neutral or negative....

5) there may be a short wave in the southern Jet stream -- the STJ-- that crashes into s CALIF feb 6-7 that bears watching for a possible Phase

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DT changes his mind every time he posts. One minute he's hyping a storm, then he's saying how the CMC/Euro look completely different than the GFS and don't show much if any snow. Meanwhile Steve D. doesn't like this weekend's storm and thinks it will turn cold but not stormy

hmmm it appears DT is just discussing the different models and what they show, not hyping anything.

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I suppose. But I wonder why when its one run of one model why its worth mentioning at all...especially with an ***alert*** tag in front of it. Obviously anyone looking for snow is going to read that and get excited.

Unfortunately those who do think that are just idiots. This is why most people blame the weather guy for the weather when it doesn't pan out the way they thought they heard it, because most people only hear what they want to hear.

Nothing is set in stone yet on this weekend. Like most sensible people have been saying, it will be model kaos for a few more days.

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I suppose. But I wonder why when its one run of one model why its worth mentioning at all...especially with an ***alert*** tag in front of it. Obviously anyone looking for snow is going to read that and get excited.

How about people learn a little reading comprehension? I mean it is ridiculous that a met should not comment on a model in a blog or something of that sort for fear that someone will misconstrue it as a forecast.

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While I think the eastern two-thirds of the nation may see the first extensive dose of "real" winter weather, I should remind everyone that it is unlikely that the chances for cold and snow will go much beyond the middle of February. For one thing, the La Nina episode over the equatorial Pacific Ocean appears stable and may impact the course and structure of the westerlies about North America. For another, consider that there is NO connection of the convection associated with the Madden-Julian Oscillation with the polar jet stream and mAk vortex below the Aleutian Islands. Since the upcoming cold surges seem to be tied to a gigantic +PNA to -EPO ridge sequence, you need a constant infusion of energy from tropical forcing to "keep the pipeline going".

Still, there is evidence that a negative 500MB height anomaly will persist across the northern Pacific Ocean through at least February 13. And, many of the numerical models show a linkage between ridging across the Siberian Arctic coastline and the vast thumb-projection jet stream curvature through western North America. Those two teleconnections are friendly to long-lived cold in the lower 48 states to the right of the Continental Divide. And if you are looking for a memorable winter storm, consider that the southern branch jet stream will undercut that western ridge and (according to the three ensemble families) offer the chance for a storm across the Gulf Coast and moving very tight to the Atlantic Coast in the February 11 - 13 time frame. Analog forecasts for February favor warmer values returning to these regions in the second half of the month. So my feeling is that if a bigger snow or ice machine does develop, mid-February represents something of a "now or never" scenario for winter weather enthusiasts.

Larry Cosgrove's forecast and views.

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Even in the garbage winters, it seems like we can pretty much count on one moderate snowfall in February, i.e. 94-95, 07-08, 06-07, 96-97, etc.

Truth be told, I can't remember one in February 1997...

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2004 was pretty horrid as well...what did it have 0.7 or something? I know 2003-2004 was only the 3rd or 4th time double digits fell in Dec/Jan and less than 1 fell in February.

An offshore storm clipped the Twin Forks that month...depositing 4 to 5 inches generally...though just 0.1" in Port Jeff.

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