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December and a Hint of January Pattern Discussion


Bob Chill

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Looks like the dreaded southeast ridge is rearing it's ugly head again on this one.  Not only that, but the ocean temps are close to 50 degrees and the antecedent high pressure is not in a favorable place.  Instead of solid northeast winds, it's a nasty southeast wind.  Don't see much to hope for with this so called "storm" later in the week.

Do you ever post anything good?

 

I guess we should just give up then... Ellinwood Jr has spoken

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Ice usually doesn't work around here so it is really hard to forecast it. I think it is easier to forecast snow, actually. This storm will likely be wet snow, sleet, or mostly rain, IMO. Little or no ZR anywhere near the cities. Won't stop the panics, though.

I could see a driveway or a tree branch getting dme ice but you're right it just seems like ever since that mixing bowl nightmare the forecast of ice far out paces the reality of ice. I'm all in for sleet though

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Ice is rarely a big deal. If the event is zr from onset with temps in the low to mid 20's then I'll be concerned. Snow to zr only makes things.pretty and never causes issues on the roads. I suppose in a perfect sn to zr setup it could take a limb down on a powerline but that's about it.

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Hard to believe the 588DM is over Miami with that surface setup.  00z GFS has some CAD, but we loose it and probably change to drizzle after about 12 hrs.   Probably because mid and upper winds shift to west instead of south and south is actually better for keeping the CAD locked in. West will just push it out to sea and replace it with downsloped already warm air.

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Hard to believe the 588DM is over Miami with that surface setup.  00z GFS has some CAD, but we loose it and probably change to drizzle after about 12 hrs.   Probably because mid and upper winds shift to west instead of south and south is actually better for keeping the CAD locked in. West will just push it out to sea and replace it with downsloped already warm air.

 

 

That damn primary low over PA floods everyone with warm air, text-book thread the needle event on the GFS.

 

it is changing over...I don't think anyone things we are getting an all snow event

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Hard to believe the 588DM is over Miami with that surface setup.  00z GFS has some CAD, but we loose it and probably change to drizzle after about 12 hrs.   Probably because mid and upper winds shift to west instead of south and south is actually better for keeping the CAD locked in. West will just push it out to sea and replace it with downsloped already warm air.

Not sure what run you are viewing but that is not what the 00Z GFS projects.

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By that time most of the moisture is switched off though... I mean yeah, we could see some drizzle, but most precip looks frozen to me

 

as wes mentioned, I think we have to worry about an inversion layer.....but this run is colder and wetter than the last one...it is indisputably  better

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as wes mentioned, I think we have to worry about an inversion layer.....but this run is colder and wetter than the last one...it is indisputably  better

 

True and agree... I dont mind sleet, was just saying that its frozen precip for this run -- be it sleet, freezing rain, or snow.

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Those are the mid levels correct?.

 

800mb-700mb..I'll look at soundings...maybe I am being too dour and we can get 90% snow....I am just assuming we will mix here in the city...when I say changeover it could mean sleet or zr

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