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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.



$$



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