100
AXPQ20 PGUM 050055
TWDPQ

Tropical Weather Discussion
National Weather Service Tiyan GU
1055 AM ChST Fri Jun 5 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...

TROPICAL AND MONSOON DISTURBANCES...
A weak circulation along the NET continues to make slow westward
progress. Today, this weak circulation is located southeast of Yap
near 7N139E. Convective coverage has improved in terms of trying
to become tied more to the LLCC itself, with more persistent cold
cloud tops surpassing -70 C also observed this morning. With
that said, no development is expected with this system as it
continues west, but it`ll bring increasing shower and thunderstorm
potential to Yap and northern Palau (mainly near Koror) over the
next few days as it continues its slow westward journey.

...OTHER WEATHER SYSTEMS...

NEAR-EQUATORIAL TROUGH...
Today, the NET enters Guam`s AOR at 8N130E and continues east to
Chuuk, where it ends as it intersects a ridge axis. Scattered
pockets of convection continue to develop near the NET and to its
south. A circulation southeast of Yap along the NET and a
building trade flow will likely put an end to the NET in the
coming days, with it likely dissipated by early next week.

SURFACE TROUGHS...
East of an area of high pressure, a stout surface trough extends
north-northwest from south of Kosrae at EQ163E to just west of
Pohnpei, ending near 7N157E. Excellent surface convergence along
this feature is fostering pockets of scattered shower and
isolated thunderstorm development, and this will continue the next
few days as the area of high pressure washes out and the trough
becomes the leading edge of increased trade-wind flow, which will
extend west through early next week.

TUTT...
The TUTT enters Guam`s AOR at 21N180 and connects to a cell
southeast of Wake Island at 17N169E. It (the TUTT) then continues
southwest before ending at a col between Chuuk and Pohnpei at
7N155E. Good divergence is found south and east of the TUTT, but
moisture is a little lean, as evident by MIMIC water vapor
imagery, which shows PWATs in the 1.5 to 2.25 inch range. This is
fairly low for the tropical West Pacific. As a result, convective
development is much less than you`d expect with a TUTT, and this
looks to continue to persist into early next week. By then, the
pattern will reshape itself which could allow for better moisture
advection/transport.

$$

Doll