Officially a “Blizzard”

The early week coastal storm…that left anywhere from 8-10 inches of snow on a good chunk of the Cape, but upwards of 14 to 15″ near the Canal…was officially designated as a “blizzard” by the National Weather Service. In fact, Hyannis officially registered blizzard conditions for a stunning 10 hours straight.

Below is their report…followed by a nice image from the MODIS satellite 3/14:

Public Information Statement
National Weather Service Taunton MA
827 AM EDT Wed Mar 14 2018

…BLIZZARD OF MARCH 13 2018…

Blizzard conditions were reached at many locations across
southeastern New England during the storm on March 13.

The definition of a blizzard is that falling and/or blowing snow
reduces visibility to below 1/4 mile along with sustained winds or
winds that frequently gust to 35 mph or more…and that these are
the predominant conditions for a period of 3 consecutive hours.

When reviewing whether a particular observation location had
blizzard conditions, we counted visibilities equal to 1/4 mile,
since that is quite low for an automated visibility sensor to detect.
We also made some subjective decisions. For example, at Marshfield,
MA, there were significant wind sensor outages, but mesonet data
from Duxbury Bay were used as a proxy and indicated nearly
continuous gusts at or above 35 mph during that time period.
At Martha’s Vineyard, there was a 3-hour wind data outage, but
mesonet data at Vineyard Haven indicated continuous gusts at or
above 35 mph during that period. At Plymouth, blizzard criteria was
met just before a complete data outage occurred, lasting most of the
day, which made the duration undeterminable.

The following observation sites were determined to have had a
blizzard…

HYANNIS, MA…………10 Hours 35 Minutes…from 730 AM to 605 PM
MARSHFIELD, MA……… 9 Hours…………..from 855 AM to 555 PM
FALMOUTH, MA……….. 8 Hours 40 Minutes…from 715 AM to 1055 AM
and from 1155 AM to 455 PM
MARTHA’S VINEYARD, MA.. 8 Hours 22 Minutes…from 800 AM to
approximately 422 PM
BOSTON, MA…………..6 Hours…………..from 840 AM to 240 PM
NEWPORT, RI………….4 Hours 20 Minutes…from 850 AM to 110 PM
PLYMOUTH, MA…………>2 Hours 53 Minutes from 732 AM to 1025 AM
but then power outage

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