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Winter Storm 1/6 - 1/8, 2017


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1 minute ago, Cold Rain said:

Regardless of snow threats, the upcoming torch and mega SER has vanished from the guidance.  That's good.

Way to go man! That negative nancy vibe you were working with, wasn't working! I thought you were joining the legion of gloom! Now, let's see the GFS bring the funk, in a bit!?

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Gsp disco

Long term /Wednesday night through Sunday/... 
as of 230 PM EST Sunday...the last couple of runs of the medium 
range guidance have been a bit more consistent. But the 
deterministic 12z European model (ecmwf) and GFS still have some disagreements on our 
sensible weather for Thursday thru Saturday. This is due to a 
large blocking upper high over the Gulf of Alaska, with short wave 
energy ejecting out from under it and interacting with a 
persistent Great Lakes upper trough. The GFS phases the energy and 
brings a vigorous vort lobe across the County warning forecast area on Thursday. This 
energy squeezes out a brief shot of moisture and with very cold 
low-level thicknesses, would support nearly all snow across the 
County warning forecast area (but mainly in the mountains). Meanwhile, the European model (ecmwf) shears 
out the energy and keeps a much flatter upper flow across the 
eastern conus, gradually digging a long wave trough across the 
central and then eastern Continental U.S. Friday thru Saturday. The previous 
run of the European model (ecmwf) had a very wet storm system associated with this 
trough for Friday and Saturday, but the 12z run keeps most of the 
moisture across the Gulf of Mexico and up along the Carolina 
coast. The ecwmf would still suggest a dry day on Thursday and 
cloud with a chance of precip Friday night thru Saturday. 

So with all that said above, the wpc preference and this forecast 
went close to the consensus of the GFS/ec/naefs ensemble means. This 
still gives a nod to the quick shot of moisture Thursday, then 
trends drier for the rest of the forecast. And this looks good given 
the new European model (ecmwf) trending drier. Any snow accums should be confined to 
the NC mountains, unless the trough ends up deeper and the precip 
falls during the overnight when temps will be cooler. Cold high 
pressure is expected to build in behind that system, with temps 
about 5 to 10 degrees below normal thru next weekend. 
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UK and ARPEGE are interesting for the first wave. The ARPEGE pops a nice low off the coast and has precipitation breaking out across the SE with a nice vort digging. UK is similar just don't have access to the precipitation/vort maps past 72 hours unfortunately. 

 

P1_GZ_D5_PN_102_0000.gif

ARPEGE.gif

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9 minutes ago, MillerA said:

Gsp disco


Long term /Wednesday night through Sunday/... 
as of 230 PM EST Sunday...the last couple of runs of the medium 
range guidance have been a bit more consistent. But the 
deterministic 12z European model (ecmwf) and GFS still have some disagreements on our 
sensible weather for Thursday thru Saturday. This is due to a 
large blocking upper high over the Gulf of Alaska, with short wave 
energy ejecting out from under it and interacting with a 
persistent Great Lakes upper trough. The GFS phases the energy and 
brings a vigorous vort lobe across the County warning forecast area on Thursday. This 
energy squeezes out a brief shot of moisture and with very cold 
low-level thicknesses, would support nearly all snow across the 
County warning forecast area (but mainly in the mountains). Meanwhile, the European model (ecmwf) shears 
out the energy and keeps a much flatter upper flow across the 
eastern conus, gradually digging a long wave trough across the 
central and then eastern Continental U.S. Friday thru Saturday. The previous 
run of the European model (ecmwf) had a very wet storm system associated with this 
trough for Friday and Saturday, but the 12z run keeps most of the 
moisture across the Gulf of Mexico and up along the Carolina 
coast. The ecwmf would still suggest a dry day on Thursday and 
cloud with a chance of precip Friday night thru Saturday. 

So with all that said above, the wpc preference and this forecast 
went close to the consensus of the GFS/ec/naefs ensemble means. This 
still gives a nod to the quick shot of moisture Thursday, then 
trends drier for the rest of the forecast. And this looks good given 
the new European model (ecmwf) trending drier. Any snow accums should be confined to 
the NC mountains, unless the trough ends up deeper and the precip 
falls during the overnight when temps will be cooler. Cold high 
pressure is expected to build in behind that system, with temps 
about 5 to 10 degrees below normal thru next weekend. 

They are still not impressed.

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Read some more good news today so just passing along from other forum. Larry says EPS is forcasting mjo into 8 territory mid month and and AO is forecasted to be in tank mid month. Larry says if we get that combo then we could be rocking late Jan. So just food for thought down the road.

I'm more interested in getting mby white late this week into next weekend. Hopefully it's white during next weekend so I can take advantage and enjoy it. 

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1 hour ago, snowlover91 said:

UK and ARPEGE are interesting for the first wave. The ARPEGE pops a nice low off the coast and has precipitation breaking out across the SE with a nice vort digging. UK is similar just don't have access to the precipitation/vort maps past 72 hours unfortunately. 

 

P1_GZ_D5_PN_102_0000.gif

ARPEGE.gif

If there is going to be suprise, miller A phased blowup, pay attn to ukmet espeacilly inside 120, preferably 96 as it will definetly sniff it out

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1 minute ago, packbacker said:

This is what you been talking about...

Screen Shot 2017-01-01 at 5.11.43 PM.png

This is exactly it.  We've gone right back to yesterday's 0z run.  Surface reflection may be different but the overall mid level output is what I'm wanting to see.

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