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Nov 1/2 Coastal Chance?


Zelocita Weather

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...TROUGH AMPLIFYING ACROSS EASTERN NORTH AMERICA...

PREFERENCE: BLEND OF 12Z ECMWF/CANADIAN
CONFIDENCE: AVERAGE

COASTAL CYCLOGENESIS IS FORECAST TO START RAMPING UP LATE FRIDAY.
OVER THE WEEKEND THIS INITIAL LOW LIFTS TOWARD COASTAL NORTHERN
NEW ENGLAND...WHILE A SECOND LOW FORMS BENEATH A STRONGLY
ANOMALOUS VORTICITY MAXIMUM THAT DIVES TOWARD THE CAROLINA COAST.
THE TWO SYSTEMS MAY CONSOLIDATE BY SUNDAY EVENING. GEFS STANDARD
ANOMALIES FOR 500 MB HEIGHTS REACH AN IMPRESSIVE 4.5 DEVIATIONS
FROM CLIMATOLOGY OVER SOUTH CAROLINA ON SATURDAY.

THERE IS FAIRLY GOOD MODEL CLUSTERING ON A LARGE SCALE...BUT A
NUMBER OF SMALLER SCALE DIFFERENCES. RUN TO RUN VARIABILITY WITHIN
THE GEFS IS EVEN A LITTLE GREATER THAN USUAL...ESPECIALLY TOWARD
NORTHERN NEW ENGLAND ON DAYS 2/3. THE 12Z GFS MOVED SIGNIFICANTLY
LEFT OF THE PREVIOUS 00Z/06Z GFS RUNS. NOT TOO SURPRISINGLY...THE
12Z GEFS MEAN SHOWED THE SAME TREND. EVIDENCE IN THE VALIDITY OF
THIS TREND IS STRENGTHENED...HOWEVER...BY THE UKMET AND CANADIAN
SHOWING SOMETHING SIMILAR...ALTHOUGH TO A LESSER DEGREE. THIS
ALLOWS US TO HEDGE A LITTLE TOWARD A TRACK FARTHER TO THE
LEFT...AND PERHAPS AN INCREASE TO THE AMOUNT OF PRECIPITATION
REACHING NORTHERN NEW ENGLAND...ESPECIALLY EASTERN MAINE...ON DAYS
2/3. THE OPERATIONAL GFS...THOUGH...APPEARS TO SPIN UP THE INITIAL
LOW MORE STRONGLY AND FARTHER LEFT THAN MOST GUIDANCE...SO WE
STILL RECOMMEND SOLUTIONS OTHER THAN THE 12Z GFS.


THE 12Z NAM WAS SIMILAR TO THE ECMWF...BUT THE NAM WAS EVEN MORE
ROBUST/DEEP WITH THE ANOMALOUS SHORTWAVE INTO THE CAROLINAS ON DAY
2...RESULTING IN A MORE ROBUST SURFACE CYCLONE. THE NAM IS ALSO
PARTICULARLY AGGRESSIVE AT RAISING HEIGHTS ON THE BACK SIDE OF THE
TROUGH BY DAY 3. THE MODELS HAVE TRENDED TOWARD NARROWING THE
BREADTH OF THE TROUGH...BUT THE AMPLIFYING PATTERN ACROSS NORTH
AMERICA WOULD ARGUE TOWARD MORE PERSISTENT CYCLONIC FLOW ALONG THE
EAST COAST...MORE LIKE THE NON-NAM SOLUTIONS.

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So close to something big, the first low is way west, second wave is weak and west.

the last couple of days each run has been progressively more phased between the two lows. I mean we literally almost have a full phase on te GFS 18z it's so close to being a full blown nor'easter. This is why you can't trust the models beyond 36 hours especially the fact that this system is very complex. Someone in the Maine state will get two feet of snow with this system. You noticed a few days ago it was showing some snow for NYC, now the GFS and EURO both lost that but it looks like the GFS is trying to get that idea back and you can tell that there'll be some snow even to our north and east of the city Saturday night as this low really strengthens! Anybody got the snow map for GFS 18z?
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So close to something big, the first low is way west, second wave is weak and west.

the last couple of days each run has been progressively more phased between the two lows. I mean we literally almost have a full phase on te GFS 18z it's so close to being a full blown nor'easter. This is why you can't trust the models beyond 36 hours especially the fact that this system is very complex. Someone in the Maine state will get two feet of snow with this system. You noticed a few days ago it was showing some snow for NYC, now the GFS and EURO both lost that but it looks like the GFS is trying to get that idea back and you can tell that there'll be some snow even to our north and east of the city Saturday night as this low really strengthens! Anybody got the snow map for GFS 18z?
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Well lets see if the GFS is a little bit more promising at least for some moderate rain and wind for NYC, Long Island and even a snow flurry or two at the back end.  Still time for the generation of the storms to trend more to the west and bring us closer to the precipitation shield and some cold wrap around moisture.

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Not if the westward shift continues.

GFS is back to a mostly out to sea and disjointed mess look that gives the city less than 0.25" and no one on Long Island more than 0.75". 

 

This one's not happening-pattern is way too progressive and the energy is too disjointed. It could be a different story for Cape Cod and downeast Maine.

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Euro op and mean aren't that far off from this.

 

I think the weak inverted trough and influx of moisture from the western atlantic is real. I don't think we'll get much from the coastal storms dynamics itself.

 

The HRRR is already picking up on this in its later frames. We'll start to see precipitation pushing westward along this weak inv trough feature tonight. It's on all high resolution models now

 

rad15.gif

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JB is STILL grasping at those straws for this storm. Writing is on the wall that those in the NYC proper-east region may see some snow flakes towards the end. Hes convinced its going to be a good bit N&W from what the models are showing. God'damn it JB quit being so damn stubborn and save some credibility for once! :lol:

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I think the weak inverted trough and influx of moisture from the western atlantic is real. I don't think we'll get much from the coastal storms dynamics itself.

 

The HRRR is already picking up on this in its later frames. We'll start to see precipitation pushing westward along this weak inv trough feature tonight. It's on all high resolution models now

 

Both the Euro op and ensemble mean give decent rains to the coast from the actual coastal now.

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JB is STILL grasping at those straws for this storm. Writing is on the wall that those in the NYC proper-east region may see some snow flakes towards the end. Hes convinced its going to be a good bit N&W from what the models are showing. God'damn it JB quit being so damn stubborn and save some credibility for once! :lol:

It will be his downfall

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JB is STILL grasping at those straws for this storm. Writing is on the wall that those in the NYC proper-east region may see some snow flakes towards the end. Hes convinced its going to be a good bit N&W from what the models are showing. God'damn it JB quit being so damn stubborn and save some credibility for once! :lol:

 

I'm waiting for the day that people stop reading his stuff and posting these same reactions. Nothing against you, but the guy is what he is. And people still bite on it every time, and post the same stuff "What a crazy forecast by JB, haha, I wonder when he will stop being so crazy omg". 

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