401
AXPQ20 PGUM 250047
TWDPQ

Tropical Weather Discussion
National Weather Service Tiyan GU
1047 AM ChST Sun Jan 25 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...

None.

...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 10N130E, passing south of Koror and through
the southern states of Yap, Chuuk, and Pohnpei, and ending near
EQ160E. Besides the pockets of deep convection near the weak
circulation northwest of Palau, the NET is convectively quiet
overall, with only patchy showers found near Yap and Palau and
a few thunderstorms found along the equatorial westerlies well
southwest of Chuuk. Over the next few days, the circulation is
expected to move farther northwest and the NET becomes a more
distinct feature in the region, with showers becoming more
developed along the eastern portion, in southern Chuuk and Pohnpei
states.

SURFACE TROUGHS...
A WNW-ESE oriented trough in eastern Micronesia is producing
moderate to deep convection and a few thunderstorms across much of
Kosrae State and southwestern Marshalls. This feature is expected
to continue to push southwestward in the coming days, blending
into the NET pattern.

OTHER SYSTEMS...
A stationary boundary is draped across the northern portion of
the region, extending west-southwestward from a circulation near
25N174E, passing between Wake and Minami Torishima, then turning
southwestward to pass through the northern Marianas and north of
Yap. This transitions into a shear line near 11N135E to end near
the aforementioned circulation northwest of Palau near 11N130E.
Widespread cloudiness and scattered showers are found along the
entire frontal boundary, with flaring, deep convection found well
north of Yap Proper, across the northern CNMI, near Alamagan, and
south of Minami Torishima, aided by near-gale force winds to the
north. As another frontal boundary pushes off the coast of Japan,
this looks to shift the regional frontal boundary and shearline
southward, bringing more unsettled weather Guam and the southern
CNMI tonight through Wednesday.

$$

IC