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Late Weekend Storm Threat


IsentropicLift

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Upton 

 

 

 

THE LONG TERM PERIOD STARTS OFF WITH WEAK HIGH PRESSURE PROVIDING
DRY CONDITIONS TO THE REGION FRIDAY AND FRIDAY NIGHT. THIS HIGH
MOVES SOUTH OF THE REGION ON SATURDAY.

SATURDAY NIGHT THROUGH MONDAY NIGHT...THE LATEST FORECAST GUIDANCE
CONTINUES TO SHOW AN ARCTIC FRONTAL BOUNDARY MOVING SOUTH OF THE
AREA PUSHED BY A BUILDING AREA OF HIGH PRESSURE MOVING EAST
SOUTHEAST ACROSS THE GREAT LAKES. OVER RUNNING PRECIPITATION IS
EXPECTED TO DEVELOP ALONG THIS FRONT SATURDAY NIGHT AND CONTINUE
THROUGH TUESDAY...WITH LOW PRESSURE PASSING SOUTH OF LONG ISLAND
MONDAY AND MONDAY NIGHT.

THE FORECAST LIQUID EQUIVALENT RANGES BETWEEN AN INCH AND AN INCH
AND A QUARTER...MAINLY IN THE FORM OF SNOW.

AGAIN THERE DO REMAIN A FEW UNCERTAINTIES IN THE FORECAST...

IF THE HIGH IS STRONGER THAN FORECAST...IT WILL PUSH THE ARCTIC
BOUNDARY TOO FAR SOUTH LEADING TO LESS OR NO SNOW.

IF THE HIGH IS WEAKER THAN FORECAST...THE LOW WILL TRACK FURTHER
NORTHER BRINGING WARMER ALOFT WITH A POSSIBLE CHANGE IN THE
PRECIPITATION TYPE FROM SNOW TO FREEZING RAIN / SLEET / OR JUST
PLAIN RAIN.
 
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I hope we get moderate snow from Saturday night into Tuesday morning it's very possible just not likely. Usually these frontal boundaries tend to stall and give people the same precip for days but will it be all snow for nyc? Great winter so far. Plenty of more to come I think...

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DEFINITELY. In fact, I've seen potential "48 hour events", or longer, turn into 6 hour hitters

just last year the GFS has a similar scenario where it was showing 72 hours of snow for nyc and it ended up getting supressed and giving mid Atlantic region a decent snow event.
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The GFS looks like the more believable scenario . Look like multiple SW swinging under the confluence . With breaks in between .

The periods of snow of lesser in terms of duration but carry a more consolidated look to it . Plenty cold for everyone on the board.

 

The 2nd SW seems to be stronger . Should be reflected in the weenie maps. This was a great run .

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Back to the light stuff by Monday night, except for LI where it will last a bit longer. The coastal is going to be weak and well offshore. Very progressive.

 

It's making huge run to run jumps at H5. I wouldn't take it seriously. What you can take from it is that it has two light to moderate events, one Sunday and one Monday, timed about the same. QPF is about 0.75" areawide, a bit more East and NW. Probably 6-10" total between the two.

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Back to the light stuff by Monday night, except for LI where it will last a bit longer. The coastal is going to be weak and well offshore. Very progressive.

 

It's making huge run to run jumps at H5. I wouldn't take it seriously. What you can take from it is that it has two light to moderate events, one Sunday and one Monday, timed about the same. QPF is about 0.75" areawide, a bit more East and NW. Probably 6-10" total between the two.

not bad at all considering its probably the lowest out of the ggem and euro and itself precip wise the past few runs

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