ACUS11 KWNS 181557
SWOMCD
SPC MCD 181557=20
MAZ000-RIZ000-181830-

Mesoscale Discussion 2337
NWS Storm Prediction Center Norman OK
0957 AM CST Mon Dec 18 2023

Areas affected...parts of eastern Massachusetts

Concerning...Severe potential...Watch unlikely=20

Valid 181557Z - 181830Z

Probability of Watch Issuance...5 percent

SUMMARY...Wind gusts may be further enhanced by a line of low-topped
convection and heavy rain as it moves across eastern Massachusetts.

DISCUSSION...A line of low-topped convection with little to no
lightning is currently swinging east across southern New England,
where a non-convective high wind event is ongoing with numerous
measured gusts over 50 kt.

Surface analysis shows relatively cool boundary layer temperatures
over coastal areas as water temperatures are in the mid to upper 40s
F. However, surface temperatures of 61-65 F exist from Boston
southward due to longer wind trajectories over land. As such, a
small pocket of higher theta-e exists in this area. Given the
extreme wind fields just off the surface, this slightly warmer air
could potentially augment surface gusts as the shallow convective
line moves through.

..Jewell/Goss.. 12/18/2023

...Please see https://urldefense.com/v3/__http://www.spc.noaa.gov__;!!DZ3fj= g!_9nJsQUBDfgLe5qMzbOCUBAV2rzjlLk5oa_9NsSrToSiFHIXLQHA5RqQbCto2qSSKxGqEQMdF= yZZevBHvMh6OJ2VUEs$ for graphic product...

ATTN...WFO...BOX...

LAT...LON 41186994 41287047 41267093 41657119 42007137 42177145
42397131 42397097 42167048 42127007 41836982 41186994=20


=3D =3D =3D
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