SPC MD 290

SPC MD 290


Mesoscale Discussion 0290
NWS Storm Prediction Center Norman OK
0817 PM CDT Sat Mar 23 2024

Areas affected…Portions of southern Maine

Concerning…Freezing rain

Valid 240117Z – 240315Z

SUMMARY…Freezing rain will remain a concern across portions of
southern Maine for at least the next few hours. Occasional instances
of sleet or snow are also possible.

DISCUSSION…KGYX and KCBW dual polarimetric radar data continues to
show a stationary transition zone between rain and a wintry mix,
roughly oriented from York to northern Washington County Maine. This
boundary should only slowly progress eastward over the next few
hours as the low-level cyclone continues to parallel the boundary
orientation and traverse the Atlantic Coastline. While snow
(occasionally heavy) will continue to the north of the transition
zone, freezing rain and occasional instances of a rain/snow/sleet
mix should persist nearer to the Maine coastline. Here, surface
temperatures hover around the freezing mark, but temperatures above
the surface have warmed above freezing given strong WAA. 0.05 inch/3
hour ice accretion rates are most likely 20+ nautical miles inland,
where surface temperatures remain around 31-32 F, which is in
agreement with some of the latest high-resolution model guidance.

..Squitieri.. 03/24/2024

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


LAT…LON 43627100 43777109 43787092 43927067 44137024 44426959
44726887 45016814 45016752 44806749 44206827 43876908
43626980 43417034 43317063 43367085 43627100

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