March 17th-18th Storm Potential Discussion

The EURO is coming in significantly better as well it seems. Consolidating energy more so than 00z and showing elongated PV...

Still not great for our area, doesn't get much precip in here. But I gotta say as far as model ranges are concerned, the euro is in the timeframe of losing a lot of its credibility whereas CMC & GFS (and of course NAM as we get closer) begin taking the cake. We'll see.

EURO caved but not too much. Good enough for now

GEFS looks pretty good ATM. Like to have the warm solutions, only a few very suppressed.

http://mp1.met.psu.edu/~fxg1/ENSPRS_12z/ensloop.html

Saw GFS snow map looking good for now, and that CMC map needs to come north about 50 miles to put me in jackpot.  Staying cautious though, but maybe try my theory a bit : )

Unfortunately my theory has worked out pretty well so far. Do not bite on a storm until it's a couple days out, it will either be gone or about to hit at that point, little to no chance of disappointment.

Tom, wouldn't 3 1/2 days be considered a couple of days out? We are in the 72-96 hour range now.

Notice on how the Canadian model, all the western energy moves east and there is a lot of northern stream interaction. EURO shows a minor event, as does the GFS. But the ensembles are more impressive looking. We'll know much more by tomorrow night.

mako460 wrote:Tom, wouldn't 3 1/2 days be considered a couple of days out?  We are in the 72-96 hour range now.

Start time is roughly 84 hours from now if it does happen. I want the whole storm within the 72 hour range, not just the start which means tomorrow 0z we'll know a lot more, anyone got GGEM ensembles?

Lol, look at the EURO.

0z







12z

GGEM Ensembles:





One thing I have noticed is that the phase is very sloppy. We need the ridge in the west to amplify more to allow the northern stream to dig. Lack of blocking in the Atlantic does not help matters, but all of our storms have been short duration this season so it's not surprising.

chances for that to come north as has been trend with the storms we have had this year?

Frank_Wx wrote:GGEM Ensembles:





One thing I have noticed is that the phase is very sloppy. We need the ridge in the west to amplify more to allow the northern stream to dig. Lack of blocking in the Atlantic does not help matters, but all of our storms have been short duration this season so it's not surprising.

Yea it's like a double barrel low type deal, not a bad thing if it's far enough north, that looks fairly similar to OP with respect to the heaviest axis of precip. Like I said doesn't matter much and take with a grain of salt at this juncture.

JMA (3rd highest statistical model this winter) is a big hit

jmanley32 wrote:chances for that to come north as has been trend with the storms we have had this year?

Not lately it hasn't been the trend. I wouldn't say there's a definitive trend, seems like half trend north and half trend south when looking at all storms this winter.

Frank_Wx wrote:JMA (3rd highest statistical model this winter) is a big hit

Meh I don't like this model, was showing the southern slider March 3rd storm as 1"+ QPF until the bitter end. Often way overdoes precip especially on the northern edge, verbatim with that track would be a south solution.

In anyones opinion is the PV the main influence for this to come North or to go South?

NjWeatherGuy wrote:

Frank_Wx wrote:JMA (3rd highest statistical model this winter) is a big hit

Meh I don't like this model, was showing the southern slider March 3rd storm as 1"+ QPF until the bitter end. Often way overdoes precip especially on the northern edge, verbatim with that track would be a south solution.

It actually goes to the BM after this frame

skinsfan1177 wrote:In anyones opinion is the PV the main influence for this to come North or to go South?

PV is in a good spot. And it is elongated too, so there is a lot of confluence to prevent this storm from cutting west. I think the western pattern is more important here.

Frank_Wx wrote:

NjWeatherGuy wrote:

Frank_Wx wrote:JMA (3rd highest statistical model this winter) is a big hit

Meh I don't like this model, was showing the southern slider March 3rd storm as 1"+ QPF until the bitter end. Often way overdoes precip especially on the northern edge, verbatim with that track would be a south solution.

It actually goes to the BM after this frame

Really? I hate how it's only 24hrs at a time.

JMA has 1.5" QPF IMBY, ohhhhhhhhhhhhh how I wish......

SREFs look decent

Im with Tom in my skepticism. Although we saw some nice trends today with the GFS, the CMC also trended south from its most amped soln, and the Euro is a tad further south as well. Going back to my original write up at the begging of this thread I am concerned with this storm being the ultimate teaser with subsequent runs flirting between a mod event and a non event to our south only to have the "pattern" of the past month prevail...strong PV suppressing the system to far south leaving us on the dry northern fringe of the system which will be cold and dry making it hard for the precip to advance north leading to serious bust potential on the northern side of this storm just like 3/3. Ill believe come Sunday morning

sroc4 wrote:Im with Tom in my skepticism.  Although we saw some nice trends today with the GFS, the CMC also trended south from its most amped soln, and the Euro is a tad further south as well. Going back to my original write up at the begging of this thread I am concerned with this storm being the ultimate teaser with subsequent runs flirting between a mod event and a non event to our south only to have the "pattern" of the past month prevail...strong PV suppressing the system to far south leaving us on the dry northern fringe of the system which will be cold and dry making it hard for the precip to advance north leading to serious bust potential on the northern side of this storm just like 3/3.  Ill believe come Sunday morning

Agree, Bernie Video. Let's see if he KOD it. I am concerned about it being a tease too, it's just too far out, trends have been good today but this far out essentially means nothing, if trends continue for the next 2 days then maybe this has some mustard.

http://www.accuweather.com/en/weather-video/next-storm-threat-for-midwest/2430839568001

NWS, Upton, NY

MODEL GUIDANCE BEGINS TO DEVIATE RIGHT OFF THE BAT DUE TO THE UNCERTAINTY WITH A NORTHERN STREAM SHORTWAVE MOVING INTO THE PAC NW ON FRI AND THE SOUTHERN STREAM TROUGH OVER THE SOUTHWEST. THE INTERACTION OF THE ENERGY ASSOCIATED WITH THESE FEATURES WILL INFLUENCE OUR WEATHER SUN NIGHT THROUGH MON. SUNYSB SENSITIVIT ANALYSIS INDICATES THE UNCERTAINTY BEGINS 24-36 HOURS FROM NOW...AND IS ASSOCIATED WITH THE HEIGHTS ACROSS WRN PORTION OF THE COUNTRY. THIS IS LENDING TO LARGE DISAGREEMENT WITH THE TROUGH AS THE TWO STREAMS MERGE IN THE LEE OF THE ROCKIES. THE ONE STRONG INDICATOR OF THIS ANALYSIS IS THAT THE EC/GFS AND CMC ENSEMBLE SYSTEMS ARE ALL INDICATING A TRACK FURTHER N THAN WHAT THE OPERATIONAL GUIDANCE IS PROVIDING. THE CMC HAS BEEN CONSISTENT OVER THE LAST FEW DAYS AND IS THE FURTHEST N WITH THE SYSTEM...SO HAVE WEIGHTED THIS WITH WPC`S GUIDANCE AS IT FIT THE SCENARIO.

WHILE IT WILL BE ANOTHER DAY OR TWO BEFORE THERE IS BETTER SAMPLING OF THE UPPER LEVEL DATA ASSOCIATED WITH THIS...TODAYS OPERATIONAL MODELS HAVE TRENDED FURTHER N...WHICH IS A STEP IN THE RIGHT DIRECTION. POLAR VORTEX OVER SE CANADA WILL PROVIDE THE COLD AIR FOR A SNOW EVENT...AND THERE IS A PERIOD OF OVERRUNNING BUT THE QUESTION REMAINS HOW FAR N DOES THE CENTER OF THE LOW (AND THE HIGHER QPF VALUES) GET. TIMING IS ALSO AN ISSUE.

Guys,

We need the ridge in the west to not get flattened out or else it will stay south so this is something we have to look at - the GGEM showed this at its 0Z run with a nice spike in the PAC = big storm for us - if we lose this we may see some snow but DC and SNJ get the storm - or we need the PV to do some dirty work IMO. The 12z GGEM showed the PAC ridge flattening out a bit

Hey I think we are close to an explosive set up that can yield us a nice if not Grand Finale Storm - just have to watch these next runs to see if we keep that western ridge - for once his past month please give us the storm and not the DC - SNJ folks - Jesus!

Yeah, these last two storms make me feel like a net on a ping pong table.....south----north.Don't tell me I'm going to see it going way south again.