Aviation Forecast Discussions Data
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    Forecaster Confidence Levels...
    Low - less than 30 percent.
    Moderate - 30 to 60 percent.
    High - greater than 60 percent.
    Short Term /through Tuesday Night/...
    1015 PM update...
    Overnight...Moderate confidence. Mainly VFR before midnight,
    except IFR on parts of Cape Cod and on Nantucket. Should see
    MVFR-IFR ceilings advect in from southeast to northwest
    overnight as the boundary layer cools. Lowest ceilings most
    likely across southeast New England. Most of the widespread fog
    will likely be confined to the south coast, Cape, and Islands
    with the southwest winds expected.
    Tuesday and Tuesday night...Moderate confidence. Improvement to
    MVFR to even VFR conditions should occur in most locations by
    Tuesday afternoon except lower cigs/vsbys may prevail across
    portions of the Cape and Islands. However, a period of
    widespread showers and thunderstorms with locally torrential
    rainfall are expected mainly Tuesday afternoon and night. A few
    of the storms may result in localized strong wind gusts. IFR to
    even LIFR conditions can be expected in the heavier showers and
    thunderstorms. Lastly...a period of southwest wind gusts around
    25 knots are anticipated along the coastal plain Tuesday
    afternoon with good mixing near the land. Improvement should
    occur from west to east after midnight.
    KBOS Terminal...Moderate confidence in TAF. In question is
    timing of period of possible development of overnight low
    KBDL Terminal...Moderate to high confidence in TAF.
    Outlook /Wednesday through Saturday/...
    Wednesday through Thursday: VFR.
    Thursday Night: Mainly VFR, with local IFR possible.
    Friday: VFR.
    Friday Night: Mainly VFR, with local IFR possible. Patchy BR.
    Saturday: VFR.