


Tropical Weather Discussion
Issued by NWS
Issued by NWS
146 AXPQ20 PGUM 020106 TWDPQ Tropical Weather Discussion National Weather Service Tiyan GU 1106 AM ChST Wed Apr 2 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 Near-Equatorial Trough (NET) extends south-southeast from the southern Philippines, entering Guam`s Area of Responsibility (AOR) near 1N130E, curving east-southeast to pass through a weak buffer circulation centered near EQ133 before crossing the Equator at roughly 135E. Scattered to numerous showers are seen hugging the Equator within the buffer circulation over the far outer Indonesian islands. The NET and embedded circulation will remain quasi- stationary over the next few days and maintain convection over the area, making a very gradual westward shift during the latter half of the week. TRADE-WIND TROUGHS... Several trade-wind troughs are seen across Guam`s Area of Responsibility (AOR). Two shallow troughs are seen east of the Marianas, extending from northwest to southeast at around 19N146E to 13N155E and 20N154E to 15N160E. Scattered showers and patchy cloud cover are seen extending along the axes of these transient features, which are expected to diminish as they shift west over the next day or two. The first of these troughs may briefly bring scattered showers over the Marianas over the next 24 hours. Another, stronger trough is seen just east of the Marshall Islands, extending southwest from 8N179E to around 1N174E. Numerous showers are seen along the trough axis covering a portion of the southern RMI, becoming scattered ahead of the trough to the south of Jaluit and Majuro Atolls. This trough will shift west over the next day or so, increasing convection near Majuro and Kosrae as it stalls over the Marshalls, gradually losing definition late in the week. OTHER SYSTEMS... A very weak remnant shear line is seen on satellite and the latest ASCAT analysis, extending west-southwest from near 13N180, passing just north of Weno, Chuuk, to around 8N148E. Patchy clouds and showers extend along this feature, which will continue to gradually lose definition over the next few days, with diminishing clouds and showers. ...ITCZ... An ITCZ fragment is seen extending west-southwest from south of Pohnpei near 6N158E, passing over southern Chuuk State to continue into southeast Yap State, ending near 3N142E. Numerous showers and isolated thunderstorms are seen along the ITCZ fragment, particularly in the area including Chuuk Lagoon, Nukuoro, Kosrae, and Pohnpei, where there is a nearby embedded ITCZ trough. South of Weno, Chuuk and westward, showers are scattered along and north of the ITCZ fragment. The ITCZ and embedded trough will maintain convection across the area over the next day or so with little movement, before gradually dissipating in the second half of the week. $$ DeCou