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Pre New Years Clipper/Re-developer


Baroclinic Zone

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7 hours ago, USCAPEWEATHERAF said:

I am thinking more in the line with NWS 4-5" tops for Chatham and Harwich tomorrow into the evening hours

Looks good for you today. Enjoy!



URGENT - WINTER WEATHER MESSAGE
National Weather Service Taunton MA
432 AM EST Sat Dec 30 2017

MAZ022>024-RIZ008-301745-
/O.CON.KBOX.WW.Y.0024.171230T1700Z-171231T0600Z/
Barnstable MA-Dukes MA-Nantucket MA-Block Island RI-
Including the cities of Chatham, Falmouth, Provincetown,
Vineyard Haven, Nantucket, and New Shoreham
432 AM EST Sat Dec 30 2017

...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM NOON TODAY TO
1 AM EST SUNDAY...

* WHAT...Snow expected. Plan on slippery road conditions. Total
  snow accumulations of 2 to 3 inches on Cape Cod and 3 to 4
  inches on the islands, with local 5 inch amounts possible.

* WHERE...In Massachusetts, Barnstable, Dukes, and Nantucket
  Counties. In Rhode Island, Block Island in Washington County.

* WHEN...From noon today to 1 AM EST Sunday.
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.NEAR TERM /UNTIL 6 PM THIS EVENING/...

Slowed the onset of the snow ever so slightly this morning based
on observed trends. Also tweaked temperatures. Forecast remains
on track this morning.

Previous Discussion...

Overall, not much change to previous thinking from the past
several shifts. Upper low moves across northern New England
tonight. A broad surface low is forecast to develop off of
DelMarVa around noon today, then track eastward. Some models
have a double-barreled low, with the main center more than 100
miles south of the 40N 70W benchmark, but a weaker center near
the benchmark. Despite these discrepancies, modeled
precipitation amounts, both from global and high-res, are
amazingly similar. Looks like about 0.2 to 0.25 inches across
the islands and closer to 0.1 inch along the coast and over Cape
Cod through the entire storm. With the `fluff factor` of snow
to liquid ratios near 20:1, this is likely to produce up to 4
inches on the islands and closer to 2 inches on the south coast
of RI, south coast of MA, and Cape Cod. Winter Weather
Advisories remain in effect for Cape Cod and the islands.

Have upped probabilities of measurable snow farther to the north
today, but that is literally for 0.01 liquid inches from
roughly the Mass Pike northward...just barely a coating.
Could see up to an inch in the Providence to Hartford areas.

The main upward vertical motion occurs over the islands in the
early evening...see below.

Ocean effect cloudiness remains over outer Cape Cod from
Provincetown to Chatham. Radar showed that snow showers
have been slowly, but steadily, encroaching on Provincetown from
the east overnight. Ceilings were lowering. So, it is possible
that the first flakes in the region occur on the outer Cape this
morning. Otherwise, expecting very light snow to overspread much
of the region after about noon then pick up in intensity along
the south coast.

Highs today will range from the mid teens NW to the mid 20s SE.
Winds were still gusting to 20-25 mph at the east coast of MA
but should be diminishing as the Nova Scotia low pulls away this
morning
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28 minutes ago, SouthCoastMA said:

Models show it drying up as it approaches from the west, thats the concern. Its so dry out

We snowed lightly up here for 5 hours yesterday with a negative Td, and air temp of 7F. And that was a ****wave moving through.

It’s overcast up here right now; so good early sign for widespread flakes at the very least.

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25 minutes ago, Baroclinic Zone said:

Guess it's relative but it's not dry out at all.  RHs are running 80% outside.

Yea “dry” is relative. It’s easy to get lulled into this meteorogological trap until you remind yourself that many frigid areas of Canada —and around the globe—receive a **** ton of snow....

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32 minutes ago, CoastalWx said:

I think HYA on east could get a good burst. With this event..I think outer cape will be one of the snowiest spots in ern MA when including the light snow events mid month, OES yesterday, and now this.

Do it. Just chuck your computer across the room. You know you want to.

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