Subj : MESO: Mesoscale Discussion 0090
To   : wx-storm@lists.illinois.edu
From : COD Weather Processor
Date : Mon Jan 23 2023 18:48:13

ACUS11 KWNS 231848
SWOMCD
SPC MCD 231847=20
MEZ000-MAZ000-NHZ000-RIZ000-CTZ000-232145-

Mesoscale Discussion 0090
NWS Storm Prediction Center Norman OK
1247 PM CST Mon Jan 23 2023

Areas affected...portions of Massachusetts into New Hampshire and
southern Maine

Concerning...Winter mixed precipitation=20

Valid 231847Z - 232145Z

SUMMARY...Wintry mixed precipitation across portions of
Massachusetts into southern New Hampshire should transition to
mostly snow over the next few hours. Meanwhile, moderate to briefly
heavy snow may persist across portions of southern Maine, with an
instance or two of 1+ inch/hr snowfall rates still possible into
mid-afternoon.

DISCUSSION...A 992 mb surface low is located roughly 200 nm offshore
of the coast of ME, and continues to progress eastward along with
the associated wrap-around moisture which has supported several
hours of wintry precipitation across northern New England. A wintry
mix has been observed over portions of southern NH into MA for the
last few hours. However, the departure of the surface low supports
surface-700 mb cold-air advection across New England, as suggested
by the 18Z mesoanalysis. As such, a transition to mainly moderate
snow is expected across southern NH into MA through the afternoon.

Farther north, a saturated dendritic growth zone remains in place
across southern parts of ME. While decreasing deep-layer ascent with
the departing surface low suggests that the snow event in this area
may have passed peak intensity, at least a few more hours of
moderate to occasionally snow remains possible, and an instance or
two of 1+ inch/hr snowfall rates cannot be ruled out through at
least 22Z.

...Squitieri.. 01/23/2023

....Please see https://urldefense.com/v3/__http://www.spc.noaa.gov__;!!DZ3fj=
g!8Dmg8h0WLjfFzDeq4mj0O3H69mQvbPq7XIILCKXi0gPA0YqZSct6CuSuQQPAppdh-YrtZBmeK=
gxJEufaiPRLlOkgYEI$  for graphic product...

ATTN...WFO...CAR...GYX...BOX...

LAT...LON   42187095 41997183 42177267 43237178 44277086 44716964
            44566874 44266898 43956969 43327059 42547105 42187095=20


=3D =3D =3D
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