Area Forecast Discussion
Issued by NWS

Home | Current Version | Previous Version | Text Only | Print | Product List | Glossary On
Versions: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
000
FXPQ60 PGUM 071947
AFDPQ

Area Forecast Discussion
National Weather Service Tiyan GU
547 AM ChST Thu Dec 8 2016

.Synopsis...
Radar and satellite show a trade-wind disturbance approaching Guam
and Rota from the east with scattered showers and even some isolated
thunderstorms, with occasional lightning indicated in the lightning
detection data. On the other hand, skies are partly cloudy over
Tinian and Saipan, with little in the way of showers. Seas are
running 6-7 ft at the buoys, with moderate trades.

&&

.Discussion...
Have split off Guam and Rota, where scattered showers and isolated
thunderstorms appear to be on tap for this morning. They have made
steady westward progress all night, with some lightning at times,
and, if they can hold together long enough, should move through after
sunrise. Tinian and Saipan will remain partly cloudy with only
isolated showers. The zone split continues through tonight, with
mostly cloudy skies lingering for Guam and Rota. Latest models show
other possible periods of mostly cloudy skies over the weekend or
early next week, but nothing is evident on satellite, and have left
partly cloudy for now.

&&

.Marine...
With the GFS no longer developing spurious tropical storms, the
marine grids have been re-done with generally lower seas over the
next few days than earlier forecast by WW3. Rip risk should remain
moderate for a few days as trade swell continues.

&&

.Eastern Micronesia...
Showers and thunderstorms continue to move to the west of Pohnpei
while trade winds keep convection south of Kosrae and Majuro. A
trade-wind trough will develop east of Kosrae the next couple of days
and eventually bring isolated thunderstorms to the island over the
weekend. Otherwise, a relatively dry trade-wind pattern will persist
over the area.

&&

.Western Micronesia...
A weak disturbance near Pohnpei will bring increased clouds and a
small increase in showers to Chuuk later today and tonight, but
isolated thunderstorms are expected over the weekend as trade-wind
convergence increases in the area.

Conditions have quieted somewhat at Yap and Palau as a disturbance
has shifted farther to the southeast, now near 3N143E. Koror may
see conditions improving sooner than currently forecast, so an
update may be in store there later. Models show a broad near-
equatorial trough well south of the area that will eventually lift
northward. This will maintain isolated thunderstorms at Yap and
Palau for much of the next several days.

&&

.GUM WATCHES/WARNINGS/ADVISORIES...
GU...None.
Marianas Waters...None.

&&

$$

Middlebrooke/W. Aydlett



USA.gov is the U.S. government's official web portal to all federal, state and local government web resources and services.