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AXPQ20 PGUM 230045

TWDPQ 



Tropical Weather Discussion

National Weather Service Tiyan GU

1045 AM ChST Wed Apr 23 2025



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...

A largely disorganized Near Equatorial Trough (NET) enters the region

near 4N130E, extending east-southeast to the Equator near EQ150E, 

extending farther east along the Equator and ending near EQ155E 

southwest of Kapingamarangi. A distinct but largely disorganized 

center of rotation is observed within said trough near 4N130E. 

Moderate to occasionally deep convection is associated with this 

feature, producing scattered to numerous showers and some 

thunderstorms within 150 miles of the center of the aforementioned 

center of rotation, and mainly south of the trough axis. This 

vorticity max is expected to dissipate under frictional forces

overnight, allowing the NET to take a much more known shape while 

spanning much of western Micronesia, with potential for more embedded

disturbances to develop in the second half of the week as trade-wind

convergence strengthens upstream.



TRADE-WIND TROUGHS...

A massive portion of the region is under the influence of diffusion,

with few lackluster trade-wind troughs developing. The first trough

is producing scattered showers and some thunderstorms along the axis

spanning northward from Tinian to Alamagan in the Marianas, another 

is producing scattered to numerous showers north-northeastward from 

Kapingamarangi to Pohnpei Proper, and within an ITCZ-like fragment in

the southern Marshalls. These features remain largely transient in 

nature, with potential for many more trade-wind troughs to develop as

the aforementioned trade-wind convergence builds across central and 

eastern Micronesia.



OTHER SYSTEMS...

The leading edge of a dissipating cold front enters the region near 

25N160E, extending southwestward acros Minamitorishima, to continue 

as a lateral trough extending further west-southwestward across 

Agrihan and end well west of the Far Northern Marianas. Some light 

showers and widespread cloudiness is associated with this feature, 

with some thunderstorms developing in patchy areas over 

Minamitorishima, and about 300 miles northeast of Agrihan. Last but 

not least, a minor squall is observed halfway between Agrihan and 

Wake Island, producing scattered showers and thunderstorms within 75 

miles of the approximate center of the mesocyclone near 20N158E. 

There is strong likelihood of these features dissipating overnight, 

as a high pressure cell builds near the northwesternmost fringes of 

Guam's AOR.



$$



Montvila