AXPQ20 PGUM 160026
TWDPQ

Tropical Weather Discussion
National Weather Service Tiyan GU
1026 AM ChST Thu Apr 16 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 CYCLONES...
As of 700 AM ChST, Typhoon Sinlaku (04W) was centered near 17.0N
144.5E, or 155 miles to the north-northwest of Tinian and Saipan.
Maximum sustained winds are around 130 mph. Surface observations at
Guam International Airport show continued winds of 20 to 30 mph
with gusts up to 45 mph. Sinlaku is producing widespread heavy
showers over the region with microwave satellite estimates
suggesting 10 to 15 inches of rainfall occurring near the center
of Sinlaku's passage. Sinlaku has shown a slight increase in
forward speed over the last few hours, moving north-northwest at
around 6 mph. As Sinlaku moves further away from the Marianas, it
is expected to weaken. Typhoon warnings remain in effect for Rota,
Tinian, Saipan, Alamagan, Pagan, and Agrihan. Then, a Tropical
Storm Warning and a Typhoon Watch remain in effect for Guam.

For more information please refer to bulletins from the Joint
Typhoon Warning Center under WMO header WTPN31 PGTW and from the
National Weather Service under WMO header WTPQ31 PGUM.

...OTHER WEATHER SYSTEMS...

SURFACE TROUGHS...
A surface trough extends southwestward from Sinlaku over Yap
Proper and Koror. Then, it continues southwest and exits the
region near 5N130E. Showers are patchy and isolated along this
area. These showers are expected to move with Sinlaku as Sinlaku
moves away.

OTHER SYSTEMS...
There are two bands of showers feeding into the outer feeder bands
of Sinlaku. The outer feeder band starts near 22N140E and extends
northeast to beyond 25N150E briefly. It then re-enters the region
near 25N154E as it extends southeastward (north of Wake Island) to
19N170E. The second band joins Sinlaku near 23N147E and extends
southeast (to the south of Wake Island) to 14N167E. The second
band is a bit fragmented. Overall, both bands are producing
scattered to numerous showers and are expected to move with
Sinlaku as it moves northward.

...ITCZ...
An ITCZ fragment is interacting with a few trade-wind troughs from
Majuro to Kosrae. This is producing numerous to widespread showers
and isolated thunderstorms. As Sinlaku moves further north, these
features are expected to extend westward into central Micronesia.

$$

Bowsher