425
AXPQ20 PGUM 100102
TWDPQ

Tropical Weather Discussion
National Weather Service Tiyan GU
1102 AM ChST Fri Jan 10 2025

Tropical Weather Discussion for the Western North Pacific between
the Equator and 25N from 130E to 180. The following information is
based on recent satellite imagery/data, weather observations, radar,
and meteorological analysis.

...SPECIAL FEATURES...

None.

...OTHER WEATHER SYSTEMS...

NEAR EQUATORIAL TROUGH...
A Near-Equatorial Trough (NET) enters the region near 6N130E,
extending east-southeast across Sonsorol to exit past the Equator
near EQ145E in southeastern Yap State. Little to moderate convection
is associated with this feature, producing scattered showers and some
thunderstorms just north to northwest of Sonsorol, with little
activity elsewhere. The NET will weaken further as it shifts toward
the Equator, being completely wiped out by the stronger trades as
early as Saturday.

TRADE-WIND TROUGHS...
A few minor surface trade-wind troughs are observed across the
region. Overnight ASCAT analysis indicates a broad surface trough
continues to move along with the trades, spanning northwest to
southeast from eastern Yap State across Chuuk State to end well
northeast of Kapingamarangi. Other notable ones are bringing moderate
showers and some thunderstorms northwest of Satawal, southwest of
Pohnpei, south of Kosrae, and east of Majuro. These features will
continue to meander to the west, remaining largely transient in
nature.

OTHER SYSTEMS...

SEMI-STATIONARY FRONT...
A semi-stationary front spans much of the subtropical region of the
western Pacific, entering the region near 25N156E over
Minamitorishima, to then extending further southwest between the
northern Marianas and Iwo-Jima. This feature then continues further
southwest as a shearline and exit the region near 16N130E. Moderate
convection and widespread cloudiness is associated with this feature,
producing showers and overcast skies across much of Guam`s AOR
northward from the frontal axis. This feature will dip just further
south over the next few days, meandering just over the northern
Marianas and weakening, followed by another high pressure system
moving across the mid-latitude western Pacific that will push another
shearline deeper into the tropics sometime around the midweek.

$$

Montvila