Tropical Weather Discussion
Issued by NWS
Issued by NWS
354 AXPQ20 PGUM 030043 TWDPQ Tropical Weather Discussion National Weather Service Tiyan GU 1043 AM ChST Mon Jun 3 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 TROUGH... A trade wind trough causing scattered showers is moving from Chuuk State into Yap State. The trough runs from near the Equator at 2N144E to southeast of Guam at 11N147E and is expected to drift further west in the coming days. TUTT... A Tropical Upper Tropospheric Trough (TUTT) runs from east of the Marianas at 15N150E through an upper-level low (TUTT Cell) southwest of Wake Island at 18N158E then through another upper low on the Date Line at 24N180E. Divergent upper-level flow is causing scattered showers and thunderstorms within about 125 miles of 14N158E and also helping develop showers farther south over Eastern Micronesia. The TUTT and TUTT Cells are expected to remain over the region, mainly from near the Marianas to across the near Wake Island region, and trigger patchy areas of showers and thunderstorms at times. OTHER SYSTEMS... ITCZ... An Inter-Tropical Convergence Zone (ITCZ) has developed over eastern Micronesia and is producing numerous showers and thunderstorms from southeastern Chuuk State across southern Pohnpei State and Kosrae State with more patchy showers over southern Marshall Islands to beyond the Date Line. Showers are mostly between 2N and 6N east of 155E. The ITCZ is expected to remain across Eastern Micronesia and cause showery and inclement weather for Chuuk, Pohnpei and Kosrae States and the Marshall Islands through this week. Very dry weather and only spotty light showers are expected for the far northern RMI through this week. COLD FRONT... A slow-moving cold front persists north of the Mariana Islands and curves from 25N151E to 19N140E tapering off near 18N133E. Extensive cloudiness and showers are seen along and north of the front to beyond 25N. This system is expected to slowly move eastward and should remain north of the far northern Marianas. Doldrums.. A pattern of light surface winds and fair weather, sometimes referred to as the Doldrums, has developed over Yap and Palau. Models indicate light winds will continue while later this week some patchy showers could arrive from the east. Doldrum-like weather over far Western Micronesia is expected to continue, although some spotty island convection could develop and a few showers could arrive from the east later this week. $$ Simpson