488
ACUS11 KWNS 162315
SWOMCD
SPC MCD 162314
MEZ000-MAZ000-NHZ000-VTZ000-170115-

Mesoscale Discussion 1660
NWS Storm Prediction Center Norman OK
0614 PM CDT Tue Jul 16 2024

Areas affected...Southern New Hampshire and northern Massachusetts

Concerning...Severe Thunderstorm Watch 549...

Valid 162314Z - 170115Z

The severe weather threat for Severe Thunderstorm Watch 549
continues.

SUMMARY...The severe wind threat across WW 549 will mostly remain
focused across southern New Hampshire and northern Massachusetts for
the next 2 hours before a line of storms moves off shore. Wind gusts
upwards of 55 to 65 mph appear possible based on environmental
conditions and recent observations.

DISCUSSION...A well-organized MCS continues to push east across the
New England region with a recent wind report of 66 mph noted in
Berkshire county, MA within the last hour. Temperatures are falling
into the low to mid 70s in the wake of the line, indicating that a
deep cold pool remains in place and should help maintain MCS
intensity for the near-term with wind gusts up to 55-65 mph
possible. This assertion is supported by recent velocity imagery
from KENX, which shows at least two focused corridors of stronger
winds within the line. Immediately downstream of the MCS, a plume of
relatively higher theta-e is noted in recent surface
observations/analyses as low 70s dewpoints continue to advect
northward. This local corridor of better buoyancy should also help
maintain MCS intensity as it translates eastward towards the New
England coast. Latest timing estimates suggest the gust front should
reach the coast roughly around 01 UTC, though the severe wind threat
may persist after 01 UTC for far southern Maine.

..Moore.. 07/16/2024

...Please see www.spc.noaa.gov for graphic product...

ATTN...WFO...GYX...BOX...ALY...

LAT...LON   42397311 42587285 42847261 43117239 43297219 43407212
            43667015 43477033 43247058 42987076 42797080 42647073
            42577074 42487086 42397311