468
AXPQ20 PGUM 270058
TWDPQ

Tropical Weather Discussion
National Weather Service Tiyan GU
1058 AM ChST Tue Jan 27 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 mid-latitude cold front enters the region near 25N167E and extends
west-southwest, passing near Minami Torishima and ending south of Iwo
To, near 21N140E. While the stronger winds of 25 to 35 kt are north of
25N, these winds are generating seas of 8 to 12 feet along the
leading edge of the cold front that quickly build to between 15 to 25
feet north of the cold front and east and north of Minami Torishima.
As the frontal boundary continues eastward, near-gale force winds
will continue to build seas to hazardous levels of 15 feet close to
the boundary, to the north and northeast of Wake Island, while the
swell generated by the cold front will build seas to around 9 to 12
feet across Wake Island by this evening, with some elevated seas of
7 to 9 feet also moving into the far northern Marshall Islands.

...OTHER WEATHER SYSTEMS...

NEAR EQUATORIAL TROUGH...
A near-equatorial trough (NET) stretches into the southwest corner
of the region, entering near 10N130E, passing through a very weak
circulation west of Koror, near 8N131E. The the NET continues just
south of Koror and through southern states of Yap, Chuuk, and
Pohnpei, and ending near EQ162E. There are some scattered showers to
the west and north of Palau and becoming more patchy over Yap this
morning, but otherwise the NET remains convectively quiet overall.
Over the next few days, the NET will continue between the equator and
the main islands, along the southern edge of the region, with trade-
wind convergence increasing along the eastern extent of NET. This
will increase the potential for scattered showers in Chuuk, and
especially across Pohnpei and Kosrae Wednesday or Wednesday night.

TRADE-WIND TROUGHS...
A series of trade-wind troughs is moving through the Marshall
Islands, generating scattered showers across Majuro and extending
northwest throug Kwajalein and surrounding atolls. As these troughs
push westward, they will help to strengthen trade convergence along
the eastern portion of the NET, increasing the potential for
scattered showers across Pohnpei and Kosrae Wednesday and Wednesday
night.

OTHER SYSTEMS...
A cold front enters the region at 25N178E and extends southwestward
to pass through Wake Island, then transitions into a shear line and
passes over Rota, and continues west-southwestward, well north of
Yap and Palau, and extends beyond 14N130E. 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 north of Yap Proper and around Rota. Based on
scatterometer data, the speed shear along this boundary continues to
slowly weaken with strong to near-gale force gusts confined to the
western portion of the shear line and fresh to strong winds across
Tinian and Saipan. This feature is expected to be quasi-stationary
over the next couple days, with the eastern portion of the boundary
weakening further.

$$

Schank