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Late January - Early February Pattern Discussion


Bob Chill

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the Friday signal was pretty strong a few days ago per EURO and GFS but then both lost it. Maybe it comes back. I am excited about February as we trade cold and dry for maybe a risk of warmer but stormier. I am not a fan of harsh dry winter conditions. Had it not been for the Tuesday storm, the Jan 20-Jan 31 period would of been a trolling disaster

 

The next epo reload (and it looks huge) going into feb doesn't teleconnect with a +PNA ridge. This is a big difference for precip patterns across the conus. Basically the pac opens up but we don't flood with pac air because upper level flow is amped up from the -epo. Signs of blocking are really showing too. Euro and EPS are dead set on a -ao period. GEFS just followed suit overnight. Take a look at CPC plots. Big change from the last couple days. Even without atlantic help, waves entering the west coast can't easily cut on us. A big wrapped up storm probably would but this is all speculation. Even if something cuts we could easily score front end with a decent antecedent airmass. 

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Here's why I'm not giving up on Wed just yet, from Mt. Holly AFD

 

 

THERE IS ONE POTENTIAL FLY IN THE OINTMENT, HOWEVER. ALL OF THE
MDLS DEVELOP A LOW OFF THE SERN CST AROUND WED. THEY THEN MOVE
THIS LOW NEWD. THE VAST MAJORITY OF THEM KEEP THE LOW WELL OFF THE
COAST WITH NO IMPACT ON OUR WX. THE ECMWF THOUGH HAS A SLIGHTLY
MORE WWD TRACK AND BRINGS A GLANCING BLOW TO OUR ERN LOCATIONS ON
WED. THE TREND SO FAR THIS WINTER (AS EVERYONE CAN SEE BY LOOKING
OUT THEIR WINDOWS) IS FOR A MORE WWD TRACK TO VERIFY AND GENLY FOR
A MORE WWD PROGRESSION WITH TIME. NOW, THE UPR AIR PATN IS A LOT
MORE PROGRESSIVE THIS TIME AND WITH SUCH A LARGE HIGH TO THE W OF
THE LOW, A WWD TRACK MAY NOT HAPPEN, BUT SOMETIMES A PERSISTENCE
FCST ENDS UP BEING THE BEST FCST. SO, WILL INTRODUCE SOME LOW POPS
IN OUR ERN AREAS, AND KEEP AN EYE ON THIS ONE. OF COURSE, THE
ECMWF IS OFTEN ONE OF THE BETTER MDLS AS WELL.
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Leesburg has about 13 inches so far in January with and will end up with a well below normal winter month with temps. Easily our best winter month since 09-10. This might be one of those rare winters where we get above normal snowfall but not historic

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If Berk is in:

 

Support for Saturday Snow:
Here is the Hi-Resolution NAM Model showing the snowfall outlook tomorrow. This has done a decent job lately, so I endorse it. Below is my take for our region. To see more on the next week and impact on the ski areas, please see my article in OpenSnow. This is a great time to sign up for the suite of Powder Finder, snow models, and slope cams
https://opensnow.com/dailysnow/post/2042

Metro Baltimore/southern PA:
*Arrival: 9 AM to 11 AM in central Maryland/southern PA
*Ending: Saturday Evening.
*How Much? General 1-2 inches near and north of Laurel/Glen Burnie. The cold air/fluff factor could bring a few spots north close to 3", especially north of Baltimore.
South into AA County, southern MD, Eastern Shore Easton/Camgridge/Delaware: A dusting to 1 inch at best.

Sunday Night/Monday: I will continue to say that I think it will pass too far north into NY State to be an impact for us. So I have not and will not bite on the hype. But some will get clipped west of Frederick and central PA

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Here's why I'm not giving up on Wed just yet, from Mt. Holly AFD

 

 

THERE IS ONE POTENTIAL FLY IN THE OINTMENT, HOWEVER. ALL OF THE

MDLS DEVELOP A LOW OFF THE SERN CST AROUND WED. THEY THEN MOVE

THIS LOW NEWD. THE VAST MAJORITY OF THEM KEEP THE LOW WELL OFF THE

COAST WITH NO IMPACT ON OUR WX. THE ECMWF THOUGH HAS A SLIGHTLY

MORE WWD TRACK AND BRINGS A GLANCING BLOW TO OUR ERN LOCATIONS ON

WED. THE TREND SO FAR THIS WINTER (AS EVERYONE CAN SEE BY LOOKING

OUT THEIR WINDOWS) IS FOR A MORE WWD TRACK TO VERIFY AND GENLY FOR

A MORE WWD PROGRESSION WITH TIME. NOW, THE UPR AIR PATN IS A LOT

MORE PROGRESSIVE THIS TIME AND WITH SUCH A LARGE HIGH TO THE W OF

THE LOW, A WWD TRACK MAY NOT HAPPEN, BUT SOMETIMES A PERSISTENCE

FCST ENDS UP BEING THE BEST FCST. SO, WILL INTRODUCE SOME LOW POPS

IN OUR ERN AREAS, AND KEEP AN EYE ON THIS ONE. OF COURSE, THE

ECMWF IS OFTEN ONE OF THE BETTER MDLS AS WELL.

 

 

another reason not to give up on it is it is at day 6....and the models lack skill at that range, esp in this pattern...I don't know what has happened to our forum that people are punting potential events or even nonexistent events a week out...

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another reason not to give up on it is it is at day 6....and the models lack skill at that range, esp in this pattern...I don't know what has happened to our forum that people are punting potential events or even nonexistent events a week out...

 

We call those people QPF Queens. 

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Unless you get a phase, which is still on the table at this point.

 

I think you guys down there should def be keenly interested, you don't need as much help as we do. I will certainly keep watching for it for my area, even though I doubt it at this point.

 

I have also learned to distrust "needing a phase" to get a storm up this way. Even if one occurs, it is often too late for us in this part of the mid-Atlantic.

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another reason not to give up on it is it is at day 6....and the models lack skill at that range, esp in this pattern...I don't know what has happened to our forum that people are punting potential events or even nonexistent events a week out...

 

http://postimg.org/image/a537m7zyn/

 

Check out the pretty dramatic differences that have taken place just since last night at 18Z and today at 12Z on the GFS. 5 or 6 days out, we could end up seeing a significantly different (for better OR for worse) evolution than we are seeing now. No need to either give up or be optimistic at this point.  

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another reason not to give up on it is it is at day 6....and the models lack skill at that range, esp in this pattern...I don't know what has happened to our forum that people are punting potential events or even nonexistent events a week out...

 

especially when we have snow-producing cold air available (which is not easy to have around here).

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http://postimg.org/image/a537m7zyn/

 

Check out the pretty dramatic differences that have taken place just since last night at 18Z and today at 12Z on the GFS. 5 or 6 days out, we could end up seeing a significantly different (for better OR for worse) evolution than we are seeing now. No need to either give up or be optimistic at this point.  

I agree,  6 days out is wayyy too far to give up or get excited, im just hoping a nw trend continues

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another reason not to give up on it is it is at day 6....and the models lack skill at that range, esp in this pattern...I don't know what has happened to our forum that people are punting potential events or even nonexistent events a week out...

Missing the point/context entirely.    Most of it is tongue in cheek....in/out, etc.   Some is cheerleading.   

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I have to say, your cartoon has really made me rethink all of the overwhelming scientific data that says global warming is taking place.

 

Because if still gets cold anywhere ever, global warming is FALSE, amirite? Derp!

 

or the 1,000+ day streak of not seeing more than 2" of snow, which by the way, we didn't shatter by any means (thanks to the band that came through towards the end of Monday's storm).

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everyone has opinions, but  global sea ice is increasing, and   look at the 1930s, considered the hottest decade,  those records still hold, but no one says global warning about the 30s,  were actually cooling

 

Yes...cooling. :axe:

 

http://www.ucar.edu/news/features/climatechange/images/global-jan-dec-error-bar-pg.gif

 

 

Bob is right, though, we're off topic - so I'll let this one go.

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