FXPQ60 PGUM 202142
Area Forecast Discussion
National Weather Service Tiyan GU
742 AM ChST Thu Jun 21 2018
A weak trough is passing south of the Marianas this morning, with
scattered showers and isolated thunderstorms as far north as 12N.
In the Marianas waters, showers are isolated, with moderate trade
winds and combined seas of 3 to 5 feet at the buoys.
This morning's 12Z GFS is slightly more moist than 24 hours ago,
and if this pans out there may be a few more clouds at times than
currently forecast the next few days. But for now, have kept the
forecast unchanged, with partly cloudy skies and isolated showers
through the weekend.
Moderate trade winds are expected to diminish to gentle tonight
through Friday night, then increase slightly back to moderate for
the weekend. Seas will change little through Sunday, maintaining a
moderate rip risk along east facing reefs.
.Eastern Micronesia and Chuuk...
The near-equatorial trough remains just south of Chuuk and Pohnpei
but has just passed north of Kosrae and is lifting northwestward over
the Marshalls. Chuuk and Pohnpei are both relatively dry this morning
while widespread showers and thunderstorms are found farther east.
Improving conditions are expected at Kosrae and the Marshalls
overnight and tomorrow, but increasing showers and thunderstorms
at Pohnpei will persist through Friday. Chuuk should expected
isolated showers and thunderstorms the next couple of days. Winds
will be changing in direction often the next few days, especially
farther east, as the trough and weak circulations swing winds around.
Wind speeds are expected to remain gentle to moderate.
.Western Micronesia for Yap and Palau...
A broad trough moving through the region will bring increasing
showers and thunderstorms to Koror this morning, but activity will
subside this afternoon. A benign weather pattern will persist through
the weekend at both locations.
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