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Pattern Change thread


ORH_wxman

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Scooter... if you compare the 12z GFS to the 00z Euro you can sort of see what's going on. By 12z Wednesday they're pretty similar but the GFS sends a pretty strong s/w through southern Quebec (not there on the Euro) and that effectively creates some confluence behind it and damps the downstream ridge. Without the big downstream ridge and some confluence batting it down you get a more suppressed storm track.

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Scooter... if you compare the 12z GFS to the 00z Euro you can sort of see what's going on. By 12z Wednesday they're pretty similar but the GFS sends a pretty strong s/w through southern Quebec (not there on the Euro) and that effectively creates some confluence behind it and damps the downstream ridge. Without the big downstream ridge and some confluence batting it down you get a more suppressed storm track.

Yeah I saw that...it's also not so pumped with the ridge out west. The gfs scenario did look kind of funky, which is making me all the more interested in the euro.

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Yeah I saw that...it's also not so pumped with the ridge out west. The gfs scenario did look kind of funky, which is making me all the more interested in the euro.

Yeah it's all about finding a way to keep the downstream ridge from going too crazy. If we can keep it flatter we can force the storm track south. Getting the big closed low off Newfoundland to retrograde south and west could be another way to do it without the GFS phantom shortwave.

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Yeah it's all about finding a way to keep the downstream ridge from going too crazy. If we can keep it flatter we can force the storm track south. Getting the big closed low off Newfoundland to retrograde south and west could be another way to do it without the GFS phantom shortwave.

The euro at least made sense with the secondary crossing the Cape. Sure all the forcing was further nw with the primary, but just enough pva and the natural baroclinic zone along the coast, fired off the secondary.

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The euro at least made sense with the secondary crossing the Cape. Sure all the forcing was further nw with the primary, but just enough pva and the natural baroclinic zone along the coast, fired off the secondary.

00z Euro probably does have some wintry mix at the onset north of ORH into portions of NH and VT.

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It looks to me , at least regarding the 12z gfs, most of the storm next Thu is sleet zr or rain.

Yeah for most of us. Also remember a ripping easterly/northeasterly sfc wind will be unpleasant for most even back from the coastal plain.

N NH and C VT have the most to gain from a set up like this unless it keeps trending south with the -NAO flexing its muscle.

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Yeah for most of us. Also remember a ripping easterly/northeasterly sfc wind will be unpleasant for most even back from the coastal plain.

N NH and C VT have the most to gain from a set up like this unless it keeps trending south with the -NAO flexing its muscle.

Yeah,  it's a great looking pattern, but looks too progressive.    The cold air gets in when the precip is done.      

One thing that's interesting is that the s/w moving into the NW CONUS regions is the impetus for the 50/50 low on Monday.   We'll have to watch that evolution along with the one at D5, actually retrogrades the PV back a bit.     Makes sense if there's a massive NAO block like that.

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Yeah, it's a great looking pattern, but looks too progressive. The cold air gets in when the precip is done.

One thing that's interesting is that the s/w moving into the NW CONUS regions is the impetus for the 50/50 low on Monday. We'll have to watch that evolution along with the one at D5, actually retrogrades the PV back a bit. Makes sense if there's a massive NAO block like that.

The PV extends into Nova Scotia now and provides some confluence by hr 150. Trough axis is tilted sw-ne and is right along the front range. Big change from 00z.

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what an ice box over the northern plains.

Yeah no kidding... sub 498dm heights!!!

It's going to be a struggle with a mammoth cold trough over the northern plains and a huge ridge that wants to build along the east coast but seems to be getting batted down more and more by the pseudo 50/50 low and the -NAO.

Whatever forms could really be a powerhouse with all this energy lying around.

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The PV extends into Nova Scotia now and provides some confluence by hr 150. Trough axis is tilted sw-ne and is right along the front range. Big change from 00z.

That trough in the Plains is so deep you have to think that it's going to win out... but then again we do have one helluva -NAO helping us out.

FUN!

We're going to see some real whacky solutions.

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