[Weather] NWS Boston EM Briefing - update on ocean effect snowfall

[BOX Operations - NOAA Service Account]

Good evening everyone,

There have been no changes to the Winter Weather Advisories, which remain
in effect for Barnstable and eastern Plymouth Counties until 4 PM
Saturday.  However, we have upped event totals to as much as local 6 to 8
inch amounts in eastern Plymouth County by Saturday afternoon (see attached
map).  Snowfall so far has been as high as 3 to 4 inches in spots.

FYI, the criteria for a Winter Storm Warning is if an average of 8 inches
falls in a 24 hour period. This is over a much longer period and those
higher amounts are more localized, not common throughout the zone.  So,
that is why Advisories remain posted.

-- Glenn Field and Kevin Cadima
    NWS - Boston/Norton

If you have any questions or would like more information, don't hesitate to
contact us via this email address, on NWSChat <https://nwschat.weather.gov/>,
or at the following:

National Weather Service Boston/Norton, MA
46 Commerce Way
Norton, MA 02766
508.622.3280
Website <http://www.weather.gov/boston> | Facebook
<http://www.facebook.com/NWSBoston> | Twitter
<http://www.twitter.com/NWSBoston>
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