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Mid to Long Term Discussion 2018


Cary_Snow95

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Latest from RAH for tonight:


PoP has also been increased into the chance range for rain/snow
showers for tonight, given the expected development of a band of
scattered to numerous showers along the Arctic front. Measurable
liquid equivalent amounts are expected to remain very light,
however, with a few hundredths of an inch or less anticipated. Any
resultant snow amounts would be even lighter - perhaps a scattered
coating on car tops, etc, across the nrn Piedmont, where
precipitation intensity and likelihood of snow will be greatest, for
an hour in any given location. Winds will also increase with the
frontal passage, with following CAA/mixing and surface gusts between
25-30 mph.

 

*****I'll take a light dusting..

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GSP's AFD regarding this weekend....the discussion doesn't specify but I assume it includes model input from the EURO as well.  

Behind the front into Saturday, cool/dry high pressure will keep
pops below mentionable levels through the day as the high slowly
transitions eastward.  Overnight into Sunday, the split flow regime
becomes increasingly active as a potent clipper works through the
southern Great lakes region, and warmer/moist air advects northward
out of the Gulf/Atl across the southeast.  With that, a digging
shortwave is progged to move through the mean trof out of the
plains and into the Midsouth region leading to surface cyclogenesis
which will work to enhance moisture advection further.  Meanwhile,
the aforementioned migrating surface ridge will have setup over
the western Atl leading to the possibility of a brief CAD window.
This entire complex shifts east through the fcst area Sunday night
into Monday, while guidance progs another fast moving clipper wave
surging in behind Monday afternoon, although it should be noted
that this second wave has trended drier.  All said, uncertainty
is high at this range as the eventual impacts of this system will
be highly dependent on timing of both the upper features for
forcing and moisture advection, as well as any CAD regime that
may or may not develop to modify the profiles in the low levels.
Thus, for now will just broadly highlight rain/snow for wx with
temperatures holding at just below normal levels.
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RAH

Friday night through Sunday: The period from Friday night through 
Saturday is expected to be dry with below normal temperatures. The 
bigger question comes with the system moving into the region 
Saturday night and Sunday. There continues to be a chance for some 
wintry precipitation Saturday night into early Sunday morning, 
before temperatures rise into the mid 30s and the precipitation 
transitions to rain. Will need to keep a close eye on this system in 
the coming days, but for right now its too early to speculate about 
impacts with this system.
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gfs_mslp_pcpn_frzn_us_46.png&key=53061bac3364b2602169893689d2d5f3245d109fcc054ca68e6261537262d00e
I know it's the end of the run, but the amount of potential this could have..... i don't want to post all the frames and create that way too long post, but another low follows this one. Interesting 5 days setup in that time frame.
I love how the 540 line is draped east to west and just north of the NC/VA state. LOL
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1 hour ago, tramadoc said:
4 hours ago, Brick Tamland said:
Euro played catch up with the last storm. 

The GFS couldn't find it own butthole with a roadmap and a compass.

How about Mapquest!?

Cant deny there are a lot of storms and a lot of cold air close by over the next 10 days or so. Just have to get timing right!

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25 minutes ago, WarmNose said:

This argues for a stronger Damming effect on the 6th..the HP is transient and not in an ideal position though 

worth keeping an eye on image.thumb.png.96f01de423b516581d31e195fe7fafa7.png

That's just a wierd look. Lots of high pressure for sure. I think previous runs have not had a High in the Northeast at all, so this is a good trend, and a whole hell of a lot better than just relying on the one in the plains, cause we all know about cold air getting over the mountains 

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24 minutes ago, mackerel_sky said:

Upon further investigation, the Monday Tuesday deal looks looke a trailing wave after a Sunday rain? Maybe cold air can trickle down after the first wave? Not feeling it at the moment 

CJ gave it the kiss of death and said "we'll keep an eye on it" :( 

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