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President's Day Weekend 2015 Storm Potential 2/14-2/15


bluewave

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Upton

 

FOR THE WEEKEND...MORE UNCERTAINTY EXISTS
WITH MODELS UNCERTAIN ON WHERE THE LOW CENTER WILL TRACK. THE ONE
MAIN DIFFERENCE THOUGH IS THE CLIPPER LOW MOVING IN FOR THE WEEKEND
AND RAPIDLY INTENSIFYING OFFSHORE WILL HAVE A VERY STRONG HIGH TO
WORK WITH MOVING INTO MONTANA AND NORTH DAKOTA. THAT IS A CRUCIAL
INGREDIENT IN MANY POTENTIAL WINTER STORMS. RIGHT NOW...SOME CURRENT
MODEL PROJECTIONS SHOW POTENTIAL FOR UP TO AROUND 6-7 INCHES OF SNOW
WITH THIS SYSTEM BUT WE COULD SEE QUITE A BIT OF FLUCTUATION BETWEEN
MODEL RUNS UNTIL WE GET CLOSER TO THIS TIMEFRAME. NOTING THE GFS
SNOW TO QPF RATIOS...THE RATIOS ARE CLOSE TO 17 TO 1...DUE TO THE
SIGNIFICANTLY COLD AIRMASS WITHIN THE REGION. THERE IS FORECAST TO
BE A WIDER AREA OF PRECIP WITH THIS LOW DUE TO THE INCREASED
BAROCLINICITY SHOWN IN THE THERMAL FIELDS AS WELL AS LESS
PROGRESSIVE MID LEVEL FLOW WITH A MID LEVEL CUTOFF LOW DEVELOPING
WEST OF THE REGION.

THE UNCERTAINTY CAN BE PORTRAYED WITHIN THE VARIABLE TRACKS OF THE
LOW. IF THE TROUGH CAN GET DEEP ENOUGH TO PUSH THE LOW FARTHER
OFFSHORE...TRENDS WILL BE LESS WITH SNOW WITH THE WEEKEND CLIPPER
SYSTEM BUT PROBABLY THERE WILL BE COLDER AMBIENT TEMPERATURES
LOCALLY. IF THE TROUGH DOES NOT DEEPEN ENOUGH THOUGH AND THERE IS A
SLIGHT WARMING TREND WITH AMBIENT TEMPERATURES...THE TRACK COULD BE
VERY CLOSE TO THE 40N/70W BENCHMARK WITH A RAPIDLY DEVELOPING LOW
CENTER CLOSE ENOUGH TO THE AREA TO FEATURE SIGNIFICANT SNOWFALL
ACROSS THE REGION. THE AIRMASS WILL CERTAINLY BE COLD ENOUGH SO SNOW
WILL BE ONLY PRECIP TYPE.

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Do we have any idea on timing of this potential system....was planning a trip down to AC Sunday - Monday with some friends since we all have off for president's day....hoping that we don't get snowed out.. 

 

 This storm looks to be Saturday into Sunday... so unless the timing changes then your trip should be OK. 

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Well we would be leaving Sunday morning.  Too far out still and with Thursday's threat possibly monkeying up the works, I'll hold tight until we get a cleaner picture.

 

Thanks!

 

Yea the more separation we can get between the two storms would benefit us... but with such a progressive pattern we need something to slow it down for us so the coastal can develop further WEST.

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Per Tip in the NE thread:

 

NCEP made the salient point this morning that it's majority is of arctic origin, relaying over the arctic ocean from Siberia...

 

I do think there is some chance that the heights in the west Atlantic are not responding enough to the forcing as these systems hit the bottom of the trough. Ex, prior to the blizzard, which was also bumped E for a while, this was also evidence inside of 72 hours, when the isopleths began "bending" more anticyclonic S of Nova Scotia.

 

Another way to look at this is what I was just discussing in the other thread. The flow seems too stretched in having an anchored western ridge axis... It may be hard to get the imagination around a correction of this nature, but this could all be bumped back west for that alone, and it would really only take what? 2 ... 3 deg of longitude --

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Per Tip in the NE thread:

 

NCEP made the salient point this morning that it's majority is of arctic origin, relaying over the arctic ocean from Siberia...

 

I do think there is some chance that the heights in the west Atlantic are not responding enough to the forcing as these systems hit the bottom of the trough. Ex, prior to the blizzard, which was also bumped E for a while, this was also evidence inside of 72 hours, when the isopleths began "bending" more anticyclonic S of Nova Scotia.

 

Another way to look at this is what I was just discussing in the other thread. The flow seems too stretched in having an anchored western ridge axis... It may be hard to get the imagination around a correction of this nature, but this could all be bumped back west for that alone, and it would really only take what? 2 ... 3 deg of longitude --

Certainly on the table.   A few of the events last year (especially the 2 on the arctic waves) came back within 48 hrs.   Wouldn't count on it, but it's possible.

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