Tropical Weather Discussion
Issued by NWS
Issued by NWS
292 AXPQ20 PGUM 260106 TWDPQ Tropical Weather Discussion National Weather Service Tiyan GU 1106 AM ChST Wed Jun 26 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... The trade-wind troughs are concentrated mainly within a convergence zone hugging the 10N latitude that are feeding into an ITCZ-like feature in far western Pacific. The most distinguishable features are producing quick-moving showers, thunderstorms and strong outflow boundaries east of Palau, across much of Yap State, and western Chuuk. These troughs are expected to continue to move west and north, shifting the convergence zone away from Yap State. TUTT... A Tropical Upper-Tropospheric Trough (TUTT) enters the region near 20N180, to then extend west to a TUTT cell near 17N153E well east of Alamagan, then extending further across the northern Marianas before ending well north-northwest of Yap. Little to moderate convection is associated with this feature, producing some thunderstorms as it interacts with surface features northwest of Pohnpei and northeast of Chuuk. The aforementioned TUTT cell is expected to continue to trek west, crossing the far Northern Marianas by Sunday, followed by further degradation in the TUTT through the first half of next week. ...ITCZ-LIKE PATTERN... A convergence zone extends from at least 10N130E southeast across Palau, moving further east-southeast across eastern Yap State to end near Kapingamarangi in southern Pohnpei State. Little convection is associated with the feature itself, but accompanying flow is allowing convectively active trade-wind troughs to form along its eastern peripheries that are bringing significant showers, thunderstorms and gust boundaries to much of western Micronesia. The feature is expected to degrade through the day, allowing doldrums to form that may last through the first half of next week. $$ Montvila