The shortwave trough arrives along with a strong surface front early
Monday morning, and moves quickly offshore by mid Monday afternoon.
Guidance is in rather good agreement on the timing of the line of
heavy rain or Fine Line. The Fine Line should be approaching
western MA/CT between 5-7 am and arriving at the I-95 corridor
between 8-11 am. The line will then be moving offshore, likely
by 1-2 pm in the afternoon. Although Fine Line will be moving
rather quickly, it will pack a punch as it moves through and
create disruptions to the morning commute. PWATS ahead of the
line will be surging to near 1.5 inches, which, combined with
the strong forcing from the shortwave, will likely result in
rain rates exceeding 1-2 inches per hour. Strong to possibly
damaging winds may also accompany the line as low-level winds
around 2kft will be approaching 50-60mph.