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February 2013 mid-long range disco thread


Fozz

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Looks like this one may be another Blue Ridge special.  Not saying that b/c it is my back yard, but soundings verbatim aren't bad West of a CHO - Warrenton - OKV line.  As I said before, that 850 can not pass over/north of us like it did on 12z.  I really hope we can all cash in on this one!

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For DCA: GFS starts around 39 degrees at the beginning of the precip, where nearly .1 falls. However, temps drop to sub 34 during the time of the thump, totaling .37 from 18z wed to 0z thu. Cooling would help if we get good rates, 850's sub -2.5 the whole duration of the precip.

Not even a warning event. Punt that

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Looks like this one may be another Blue Ridge special.  Not saying that b/c it is my back yard, but soundings verbatim aren't bad West of a CHO - Warrenton - OKV line.  As I said before, that 850 can not pass over/north of us like it did on 12z.  I really hope we can all cash in on this one!

18z was definitely better wrt the vort and features than 12z, also a bit cooler. I think we could cash on this one, I am optimistic the s/w will be amped as the gfs has it, and to be honest, the DGEX solution (which is obviously way overdone we can say with decent confidence) in a condensed version (i.e. the low track, vort pass) is not all that erroneous. 

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there are a lot of things going against us

Negatives:

- The pattern is good...not great

- Poor air mass

- no high pressure to the north or northwest

- persistence

- hard to get big storm in otherwise crappy, torchy winters unless a fluke(12/73, 2/95(but nino), 3/99, 3/09 (but cold winter), 2/06( but decent cold DEC)

- climo in torch, bad enso winters STRONGLY suggests modest events only for the coastal plain

- hard for DC to get snow in general

- Nina is a deathknell

Positives:

-February may be undergoing a slight ENSO lag bounce from Fall nino-ish conditions

- We have a faux southern stream, though probably a bit too weak, not unlike some weak ENSO years

- EPO has made colder air more accessible

- the pattern isnt hostile to a modest event

- We are due?

- if 40N, then why not us? (1969, one of my analogs popping up, but we had to wait until March)

- the PAC is way better in general than we have seen in a while

- 6"+ events for DC and immediate burbs happen about 50% of winters

- AGW is causing bigger events

I think with any discrete event in the upcoming 10-14 days, until we are <48 hours it is foolhardy to hope for a 6"+ event given the above factors other than for morale and fun...If we are sincerely thinking any of these events has a better than 50-50 chances of materializing into a 5-8"+ event, then there isn't really much that separates us from the random ignorant public

I like this post. Some should read it a couple of times.

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Not sure what you mean

The vort pass is good still at least. Now we need more cold air and more dynamics

 

Just being a smartass.... mass = MA....as in boston etc... I know..pretty lame.

 

You know this stuff better than me so I definitely know you are interested. May not be anything major but we both like these setups. 

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Just being a smartass.... mass = MA....as in boston etc... I know..pretty lame.

You know this stuff better than me so I definitely know you are interested. May not be anything major but we both like these setups.

Ahh yeah

Ill take that vort path and hope for sure. Would prob favor NW tho the Euro needs to come aboard more. Could still be a fringer.. I won't hate on the GFS but I'm not going to buy it wholeheartedly either.

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if memory serves, the DGEX for us looks like what it showed for NE in today's storm in a similar time frame, so that's encouraging <hoping it remains good with this pattern>

Should read DT update from earlier

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thanks...being bullish about big snow events here is pretty unrewarding and futile....i think verbatim GFS would drop 2-3" in dc proper....just need a nice thump and temp will drop to 33-34

Watching all the news footage out of NE is tough but if someone said that I could have a 3" snow this week or chance it for door #1 or 2 with the idea that one choice is better than 3" and the other is worse, I take the 3".

It's only weather but wanting more than what the pattern is able to give is psychologically risky.

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On the VD storm, I liked the 12z GFS a little better because the L off Hatteras was hugging the coast. Thus, the 18z GFS edged closer to the EURO. I think this run is colder only because the L is further off Hatteras. We need a stronger L off Hatteras to pull in the cold air AND close enough to the coast so the precip doesn't slide off the coast. Thus thread the needle a bit. The current GFS has a tight gradient on the back-end so if it does slide a little to the east, the DC area (points west) get nothing. Overall, I still like the set-up, and will stick with my 2-4 inches starting as rain and changing over to snow in the afternoon.

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