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February Forecast Discussion


REDMK6GLI

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I think this bears watching, it's been the subtle shortwaves that have crept up on us this winter.

A lot of the time, our big events come from storms that don't get much attention until within 80 hours or so, when they suddenly "come out of nowhere" per say. Usually it's a storm that was projected to go out to sea, but suddenly models begin depicting westward solutions.

 

IMO There is simply way too much that can change with storms beyond 100 hours. 100+ hour guidance can be good for looking at patterns/storminess, but at this point it absolutely should not matter what track this storm takes. It's good that the models are continually showing this storm, and that's all that you really can take from this for now.

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A lot of the time, our big events come from storms that don't get much attention until within 80 hours or so, when they suddenly "come out of nowhere" per say. Usually it's a storm that was projected to go out to sea, but suddenly models begin depicting westward solutions.

 

IMO There is simply way too much that can change with storms beyond 100 hours. 100+ hour guidance can be good for looking at patterns/storminess, but at this point it absolutely should not matter what track this storm takes. It's good that the models are continually showing this storm, and that's all that you really can take from this for now.

I disagree. Most of our storms are sniffed out by the models at least a week or 10 days in advance. They might waffle back and forth, particularly the GFS which will almost always suppress the storm too far to the south. The details might not be ironed out until 48-72 hours out but last week's 'out of nowhere' storm is not the norm.

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Funny how Boxing Day had the LP just south of New Orleans before it turned up the coast. I guess there is a big difference between having the LP over Northern LA or Southern LA as to whether we stay cold enough or not.

Cannot compare the situations. Totally different patterns. Low placement means little in different patterns.

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Funny how Boxing Day had the LP just south of New Orleans before it turned up the coast. I guess there is a big difference between having the LP over Northern LA or Southern LA as to whether we stay cold enough or not.

No. It has more to do with blocking, trough positioning, phasing etc etc etc
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Cannot compare the situations. Totally different patterns. Low placement means little in different patterns.

I should have rephrased what I said. I meant to say how different SLP positions in the Deep South correlate to us receiving rainstorms, icestorms or snowstorms as the end result, This does not imply causation of course.

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So this is not a Miller A? Didn't Boxing Day originate its moisture from Mexico as well?

Its not Miller A vs. Miller B.  A low can be over northern LA and track East/NE through the South and off the midatlantic coast and still give us snow but would not be a coastal storm like Boxing Day. This storm is headed north northeast which is why it would cut.

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I should have rephrased what I said. I meant to say how different SLP positions in the Deep South correlate to us receiving rainstorms, icestorms or snowstorms as the end result, This does not imply causation of course.

It really doesn't. It depends on where the storm goes from where it is in LA. A storm around New Orleans won't always give us snow if it doesn't turn up the coast and a storm over Northern LA won't always be rain.

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I should have rephrased what I said. I meant to say how different SLP positions in the Deep South correlate to us receiving rainstorms, icestorms or snowstorms as the end result, This does not imply causation of course.

It doesn't. It's all about the pattern. You need blocking or some mechanism to keep the storm from cutting to the west.

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Its not Miller A vs. Miller B.  A low can be over northern LA and track East/NE through the South and off the midatlantic coast and still give us snow but would not be a coastal storm like Boxing Day. This storm is headed north northeast which is why it would cut.

 

 

 

It really doesn't. It depends on where the storm goes from where it is in LA. A storm around New Orleans won't always give us snow if it doesn't turn up the coast and a storm over Northern LA won't always be rain.

 

 

It doesn't. It's all about the pattern. You need blocking or some mechanism to keep the storm from cutting to the west.

 

Gotcha, thanks.

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I should have rephrased what I said. I meant to say how different SLP positions in the Deep South correlate to us receiving rainstorms, icestorms or snowstorms as the end result, This does not imply causation of course.

Understood, weather is crazy and rarely does the same identical thing twice lol.

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Understood, weather is crazy and rarely does the same identical thing twice lol.

Yeah, definitely. Here at work, I got really euphoric when YanksFan mentioned that this was coming from the Rio Grande and was very amplified. I thought an epic solution was coming with the STJ involved big time like Boxing Day. Of course, in all seriousness, I think YanksFan is still an insightful poster here.

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Yeah, definitely. Here at work, I got really euphoric when YanksFan mentioned that this was coming from the Rio Grande and was very amplified. I thought an epic solution was coming with the STJ involved big time like Boxing Day. Of course, in all seriousness, I think YanksFan is still an insightful poster here.

When you hear "very amplified" over the south central states and we have no blocking and you hear " the trough is going negative" it's a cutter

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When you hear "very amplified" over the south central states and we have no blocking and you hear " the trough is going negative" it's a cutter

78 had something similar I believe. Big ohio valley blizzard and then the big east coast storm (2/6-7). Not sure how far apart the storms were but I know its been talked about alot

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We want the flatter less amped 500 mb evolution of 0z so the SE Ridge doesn't get pumped up.

It's pretty typical for the OP euro to move the PV around a lot in Canada day 8-10 from run to run.

 

0z

 

attachicon.gifOLd.gif

 

12z

 

attachicon.gifGeopotential3250032hPa32and32Temperature32at3285032hPa_North32America_192.gif

Those 12z Euro Ensembles will very be telling.

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