Synopsis: Moisture will increase on southerly flow Tue leading to possible showers/isolated thunderstorms. A strong cold front approaches our area Tuesday night, with a wave or waves of low pressure slowing the progression of the front. A soaking rain with locally heavy rainfall is possible late Tuesday night into Wednesday night. Astronomical tides will be very high all week, but will peak Wed. afternoon. Coastal flooding is possible Wed thru Friday this week.
Coastal Flooding: Mainly splashover is possible during high tide cycles thru Tuesday night due to high astronomical tides but winds will be on the light side. However,coastal flooding may occur during multiple tide cycles starting with the Wednesday afternoon high tide, going through the workweek. The main area at risk for coastal flooding is east coastal MA including Cape Cod Bay and Nantucket. The Wednesday afternoon high tide is the astronomically highest of the week...up to 12.18 ft. at Boston. Northeast winds will be increasing during Wednesday, and may persist thru Friday.
Marine Impacts: A Gale Watch and subsequent Gale Warnings may be needed for portions of the waters beginning Wednesday evening and possibly continuing thru the remainder of the workweek. Due to the prolonged fetch of onshore flow, seas will be steadily building...up to 9 to 12 ft by Thursday over the outer waters.
Heavy rainfall: Locally heavy rainfall is possible at times. The most probable time would be late Tuesday night into Wednesday night. During that timeframe, the potential exists for 2-4 inches of rainfall. Locally higher amounts are possible.
For this weekend/
Tropics:
The National Hurricane Center is monitoring a system midway between the Bahamas and Bermuda, moving to the northwest. It has a 60% chance of becoming a named tropical cyclone within the next 48 hours. This will need to be closely monitored. At this time there is a lot of uncertainty on this, but this needs to be monitored for the potential of additional hazardous weather to southern New England towards this weekend.
Stay tuned over the course of this week for further updates.
-- Nicole Belk
NWS Taunton MA
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