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TWDPQ 



Tropical Weather Discussion

National Weather Service Tiyan GU

544 AM ChST Mon Apr 15 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...



NEAR-EQUATORIAL TROUGH...

The near-equatorial trough (NET) extends west-northwest from the 

equator near 140E, through a weak circulation centered around 1N135E,

and exit the region around 5N130E as it continues towards the 

Philippines. Scattered to numerous showers and isolated thunderstorms

are developing along and just north of the NET, with showers

developing near and south of Palau and extending back towards 

Eauripik in Yap State. Showers become spotty to scattered north of 

Palau and Eauripik, which includes Yap Proper.



TRADE-WIND TROUGHS...

A couple of trade-wind troughs near Chuuk State, one located between

the NET and Weno near 6N145E and the second south to southeast of the

Weno near 5N154E, are generating scattered to numerous showers and 

isolated thunderstorms across Chuuk Lagoon and nearby islands and

continuing south towards the equator.



TRADE-WIND SURGE...

The trade-wind surge is weakening, with scatterometer data showing

pockets of 20 knot winds across the northern atolls of the RMI, near

and north of Kwajalein and continuing northeast to beyond the Date 

Line. These pockets of 20 knot winds are encompassed by broader area

of 15 kt winds that extends across the Marshall Islands and ending 

near Pohnpei. Convergence generated by the stronger flow meeting the 

slower trade-winds is generating some scattered showers and isolated 

thunderstorms around Pohnpei and extending eastward to Kwajalein in 

the RMI, passing well north of Kosrae.



...DISCUSSION...

The NET is expected to drift westward over the next few days and will

be followed by the trade-wind troughs in Chuuk State, this will

continue to support scattered showers around Yap through Tuesday and

scattered to numerous showers at Palau through at least Wednesday,

while showers will slowly decrease across Chuuk Lagoon.



The trade-wind surge is expected to remain weak and fragmented

through Tuesday, with scattered showers expected to continue around 

Pohnpei and just north of Majuro. As the sub-tropical ridge north of 

the region shifts southward, expect the trade-wind surge to rebuild,

which will also strengthen and push the convergence zone associated

with the trade-surge southward, increasing showers across Majuro and

the southern RMI and Kosrae later in the week.



$$



Schank