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Feb 13-15 modeled event increased confidence now.


Typhoon Tip

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The antecedent airmass is absolutely putrid. While confidence in some kind of storm is higher... boy... it would have to be a perfect bomb to bring snow to many. 

 

A lot of the GEFS that have a good look are absolute furnaces aloft. 

I know you are forecasting for SNE but this antecedent airmass looks quite good not too far north of the mass border. This is CON and Hookset zones.

 

TUESDAY...MOSTLY SUNNY. HIGHS AROUND 20. NORTHWEST WINDS AROUND

10 MPH WITH GUSTS UP TO 20 MPH.

.TUESDAY NIGHT AND WEDNESDAY...MOSTLY CLEAR. LOWS AROUND ZERO. HIGHS

IN THE MID 20S.

.WEDNESDAY NIGHT...PARTLY CLOUDY IN THE EVENING...THEN BECOMING

MOSTLY CLOUDY. NOT AS COLD WITH LOWS 10 TO 15.

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Nah,,... this time of year, with rotted ("putrid") air masses, if they are within a stone's throw of freezing the column will more typically end up in an isothermal blue snow. 

 

Did you guys see that frankenmodel DGEX from 06 z... ?   I don't have a lot of experience with that model but it was cold! 

 

Also, the 12z UKMET looks like a classic 9-12 hour coastal storm, p-type aside, but I suspect it is cold enough.  

 

Interesting that there is some suggestion overall that the N-stream 'kicker' impulse may also bring it's own fun; though I suspect that it really just prolongs (norluny) instability -- subject to change of course.

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So that suggests benchmark but keeping a substantial northerly component?  That is what the qpf maps have been suggesting.  That gets the storm in the gom and really helps out up here and over by your vacation home.

 

This seems like a system that will travel up to the benchmark and then just east of CHH.  I think at the benchmark it could be down to 975mb and then sub 970mb as it passes CHH.  With the ensemble mean near 992mb chances are that this is a bomb.

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GYX saying

still cautious but more optimisitic in the update now:  But the EC is a moderate snowstorm for us?  I can't imagine that 992 near CC is 6 inches or less.  Scooter caution flags affecting gyx (but probably prudent)

 

THE 12Z MODEL

SUITE IS IN BETTER AGREEMENT TODAY...WITH THE CONSENSUS GIVING

MAINE AND NH AT LEAST A LIGHT TO MODERATE SNOWFALL.

OVER THE LAST 24 HOURS...THE MODEL SUITE HAS TRENDED TOWARD THE

FASTER AND MORE AMPED ECMWF. HOWEVER...DIFFERENCES IN THE SPEED OF

AN IMPORTANT UPSTREAM KICKER IN THE NORTHERN STREAM...AS WELL AS

THE DEGREE OF AMPLIFICATION OF THE SOUTHERN STREAM WAVE ARE STILL

PRESENT. EVEN JUST MINOR VARIATIONS IN SPEED AND

AMPLIFICATION/STRENGTH OF THESE TWO PLAYERS CAN VERY EASILY CAUSE

A VERY DIFFERENT OUTCOME THAN WHAT WE ARE SEEING IN THE MODEL

CONSENSUS TODAY.

THEREFORE...CONFIDENCE IN LOW TRACK...STRENGTH AND CERTAINLY THE

RESULTANT QPF/SNOW AMOUNTS CONTINUES TO BE LOW. THE 12Z

DETERMINISTIC ECMWF WOULD GIVE THE COASTAL PLAIN A MODERATE

SNOWFALL THURSDAY. THE 12Z GFS WOULD BE LIGHTER THAN THAT AS IT

HAS A MORE OFFSHORE SOLUTION. THE 12Z UKMET IS SIMILAR TO THE

ECMWF...AND THE 12Z CANADIAN GLOBAL HAS A BLIZZARD FOR MUCH OF THE

MID ATLANTIC AND NORTHEAST. THEREFORE...A RANGE OF SOLUTIONS IS

STILL IN THE CARDS...BUT CONTINUE TO LIKE THE ECMWF THE BEST ATTM

AS IT SEEMS TO BE TOWARD THE MIDDLE OF THE RANGE OF POSSIBLE

SOLUTIONS.

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