655
AXPQ20 PGUM 260152
TWDPQ

Tropical Weather Discussion
National Weather Service Tiyan GU
1152 AM ChST Mon Jan 26 2026

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...

OTHER FEATURES CAUSING GALE FORCE WINDS OR HAZARDOUS SEAS...
A broad fetch region behind a mid-latitude cold front is
generating significant northerly swell and increasing seas to
hazardous levels of 15 feet near Iwo To and Minami Torishima,
between 144E and 157E, and north of 24N. As the frontal boundary
move eastward, near-gale force winds will continue to build seas
to hazardous levels of 15 feet close to the boundary, over and east
of Minami Torishima.

...OTHER WEATHER SYSTEMS...

NEAR EQUATORIAL TROUGH...
A near-equatorial trough (NET) stretches into the southwest
corner of the region, extending southeastward from a weak
circulation near 7N130E, passing south of Koror and through
southern states of Yap, Chuuk, and Pohnpei, and ending near
EQ158E. Besides the pockets of deep convection northwest of the
circulation, the NET is convectively quiet overall, with only
patchy showers found north of Palau and a few thunderstorms found
along the equatorial westerlies well south of Koror. Over the next
few days, the circulation is expected to slowly move west of the
region and the NET continues to be stretched out near the southern
edge of the region, with trade- wind convergence increasing along
the eastern portion, in Chuuk and Pohnpei states.

SURFACE TROUGHS...
A WNW-ESE oriented trough in eastern Micronesia is producing
patchy showers across southern Chuuk and Pohnpei State. This
feature is expected to slowly push southwestward in the coming
days, keeping showers near and south of 5N.

A weak trough extends at 6N168E to 18N180 and is producing
patchy, shallow showers. This feature is expected to continue to
weaken over the next few days.

OTHER SYSTEMS...
A cold front extends from a circulation just outside the northeast
corner of the AOR and enters the region at 25N180 and extends
southwestward to pass just north of Wake, then transitions into a
shear line and passes over Guam, and continues west-southwestward
north of Yap and Palau, and extends beyond 11N130E. Widespread
cloudiness and scattered to numerous showers are found along and
within 250 miles north of the frontal boundary and shear line.
Flaring, deep convection and isolated thunderstorms are found
along a segment of this feature, well north of Yap Proper, across
the Marianas, and south of Minami Torishima. Based on
scatterometry data, the speed shear along this boundary has
decreased slightly, with strong to near-gale force gusts being
confined to the western portion of the shear line and fresh to
strong winds across the CNMI. This feature is expected to be
quasi-stationary over the next couple days, with the eastern
portion of the boundary weakening further.

Another cold front extends into the region near 25N160E and
extends southwestward to 21N147E, then curves westward to 22N133E.
Widespread clouds and moderate convection are found along and
within 250 miles north of this boundary. This frontal boundary
will continue to move eastward, across the northern periphery of
the region.

$$

IC