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Tropical Weather Discussion
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AXPQ20 PGUM 211908
TWDPQ

Tropical Weather Discussion
National Weather Service Tiyan GU
508 AM ChST Mon Apr 22 2024

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...

TRADE-WIND TROUGHS...
A weak trade-wind trough has pushed west of Ngulu is Yap State and
is approaching the Republic of Palau. Widely scattered showers and
a few thunderstorms are accompanying this feature.

Another trough in the trades stretches northwest from EQ178 to
north to northeast of Kosrae and up towards Ujae Atoll.
Widespread cloud cover with showers and a few thunderstorms are
associated with this feature from the equator northward to
Namorik, where better surface convergence is found, becoming
extremely isolated north of there.

Another trough extends northwest to northward from EQ178 to east
of Majuro before ending near 13N 174E. Minimal convection is found
along this feature as the only convergence is associated with
speed convergence.

...DISCUSSION...
Convergence and moisture quality looks to improve for the latter
half of the week across between 5N and 9N from 140E to teh Date
Line as seen in the latest GFS GDI values. Surface convergence
should also get a boost along the trough located across eastern
Micronesia/western portions of the RMI. This should foster
expanding convection both in terms of aerial coverage and
intensity as we head through the week.

Another trough approaching the RMI from the east is also expected
to sharpen some, aided by good speed convergence along it. This
may also help expand rainfall coverage, perhaps even to 10N.
Unfortunately though, north of there the GFS forecasts remain
quite dry.

$$

Doll
National Weather Service Regional Headquarters
