910
AXPQ20 PGUM 170053
TWDPQ

Tropical Weather Discussion
National Weather Service Tiyan GU
1053 AM ChST Mon Nov 17 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...
The Near Equatorial Trough (NET) extends east across 130E near 4N,
passing south of Palau to a weak circulation centered near 3N144E,
then continues east-southeast to beyond the Equator near 155E.
Scattered showers and isolated thunderstorms are found south of the
NET west of 141E. Patchy showers are found elsewhere along the trough
and with the circulation. The NET looks to remain quasi-stationary as
the circulation continues to drift west with no change in intensity
over the next few days.

TRADE-WIND TROUGHS...
There are a few trade-wind troughs seen across the region. The first
one is found east of Yap Proper, extending north-northwest from near
6N142E to end near 12N140E. This trough is interacting with a band of
trade-wind convergence to generate scattered to numerous showers and
isolated thunderstorms east through south of Yap Proper. The trough
will continue to move west-southwest over the coming days,
maintaining enhanced convection along the convergence band, with no
change in intensity.

Another trade-wind trough is found east of Weno, Chuuk to south of
Kosrae, extending northwest from near 3N162E to end near 7N156E.
Scattered showers and a couple of thunderstorms are found southwest
of Pohnpei to southeast of Weno. This trough will continue to move
southwest over the coming days as it slowly weakens. However, it may
begin to interact with the far eastern end of the NET to enhance
convection near the Equator.

The next trade-wind trough is found just east of Kosrae, extending
northwest from near 2N170E to 7N163E. The trough is producing
scattered showers and a few thunderstorms west of Kosrae to just
south of Pohnpei. This trough also looks to continue to drift
southwest as it weakens over the next day or two.

The last trade-wind trough is found along the Date Line, extending
north-northeast from near 3N179E to beyond the Date Line near 10N.
Isolated showers are currently seen along the trough. However, a very
weak ITCZ is found over the same area and the trough is expected to
interact with the ITCZ, resulting in increased convection over the
Marshall Islands as it drags the ITCZ westward.

A series of very weak and hardly discernible trade-wind troughs are
seen north of 10N between 157E and 174E, producing bands of spotty
showers and a couple of thunderstorms well east of the Marianas.
These weak troughs will remain very weak and likely dissipate as they
move west toward the Marianas.

TUTT...
A weakening TUTT enters the region near 19N180, extending west to a
weak TUTT low centered near 19N179E, then turns west-southwest to
near 13N160E, then continues west to end near 14N140E. Only spotty
showers are seen along the TUTT and TUTT low. The TUTT looks to
remain quasi-stationary over the coming days as it slowly weakens.

OTHER SYSTEMS...
FRONT AND SHEAR LINE...
A stationary front enters the AOR near 25N175E, extending west-
southwest to 21N156E, then continues west as a shear line to end
near 21N132E. Cloudiness with patchy showers is found along and up
to 180 miles north of the stationary front. Patchy scattered showers
and isolated thunderstorms are found up to 115 miles north of the
shear line. The front and shear line look to move east and drift
south over the coming days.

TRADE-WIND CONVERGENCE...
A band of trade-wind convergence is found north of the NET, extending
west-northwest from south of Weno, Chuuk near 5N153E to east of Yap
near 8N140E, then turns southwest to end south of Palau near 5N134E.
Scattered to numerous showers and isolated thunderstorms are found
along this band. A trade-wind trough east of Yap is interacting with
the convergence to generate enhanced thunderstorm activity east
through south of Yap Proper. The convergence looks to drift west as
the circulation along the NET drifts west over the next few days,
with little change in intensity.

...ITCZ...
A weak ITCZ is found from southeast of Majuro near 3N175E, extending
northeast to beyond the Date Line near 10N. Most of the convection
associated with the ITCZ is seen east of the Date Line, with only
spotty showers found along the ITCZ west of the Date Line. The ITCZ
looks to strengthen over the coming days as it slowly spreads
westward.

$$

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