Severe Storm Outlook Narrative (AC)
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ACUS11 KWNS 152156
SPC MCD 152156 COR

Mesoscale Discussion 0187
NWS Storm Prediction Center Norman OK
0356 PM CST Wed Feb 15 2017

Areas affected...Southwest ME...East-central NH

Concerning...Heavy snow

Valid 152156Z - 160300Z


SUMMARY...A band of moderate to heavy snow, with rates in excess of
1"/hr, is expected to develop across portions of southwestern ME and
east-central VT over the next several hours.

DISCUSSION...Latest surface analysis reveals a low centered over
eastern MA and RI with pressure falls around 2 mb per 2 hours across
portions of far eastern MA and southwestern ME. As a result, the
general expectation is for this low to continue tracking
northeastward while gradually deepening in response to large-scale
ascent associated with the approaching upper system. This
deepening/strengthening is also expected to enhance the 850 mb
easterly flow with the resulting WAA acting to strengthen
frontogenesis and contribute to favorable mesoscale forcing for
ascent. This combination of favorable synoptic and mesoscale ascent
is expected to result in a development of a band of moderate to
heavy snowfall during the next few hours across the region. Given
the potential for modest upslope enhancements, snowfall rates over
1" per hour are possible. Areas near the coast that are currently
above freezing will gradually cool during the next hour or two with
the resulting profiles supportive of snow.

..Mosier.. 02/15/2017

...Please see for graphic product...


LAT...LON   43637127 44437085 44926992 44876902 44246909 43487032
            43327137 43637127 is the U.S. government's official web portal to all federal, state and local government web resources and services.