Weather Alert: Weekend rain, wind, and coastal impacts

QUIET THROUGH TONIGHT

Partly cloudy skies and breezy through tonight as lows fall back to around 50 degrees. Tomorrow starts off dry, but wind alerts go in effect in the morning before conditions slowly deteriorate during the day. First for Southeast Massachusetts, rain and wind both pick up Friday evening ahead of the height of the storm Saturday.

COASTAL STORM

Friday through Sunday we have a Coastal Flood Watch and a High Surf Advisory in effect for waves 10-20 feet, minor coastal flooding with each high tide, and inundation up to a foot. Beach erosion will be moderate to potentially severe from the big breaking waves over a very long duration.

Winds will peak Friday to Saturday with N/NE sustained winds 15-30 mph with gusts up to 50 along the coast, possibly 60 mph on the Cape and Islands. Sunday will still be very windy and wet, but we may not meet the same criteria for a High Wind Warning. Inland communities will see gusts 30-40 mph with a lower risk for wind damage and power outages, though I won’t rule out a few problems there.

Rain will likely develop Friday afternoon across southeastern MA. It’s a hard call in Boston with the chance but not guarantee for afternoon rain. Areas north and west of the city probably stay dry until Friday evening or night. Steady, at times heavy, rain will fall all weekend and eventually taper off Monday as the storm gradually pulls away. Rainfall totals will range from 1-2″ inland to 2-6″ along the coast and Cape. Those numbers are not set in stone, but an example of how persistent rain could definitely add up. Flash flooding is unlikely as the timeline is drawn out over a long stretch.

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