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Tropical Weather Discussion
Issued by NWS
Issued by NWS
815 AXPQ20 PGUM 230105 TWDPQ Tropical Weather Discussion National Weather Service Tiyan GU 1105 AM ChST Sun Jun 23 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... A near equatorial trough (NET) begins over the Philippines and enters the area of responsibility (AOR) near 7N130E and extends south and east, staying south of the main islands of Palau and Yap Proper, and exits the AOR near EQ143E. A weak circulation within the NET is southwest of Koror. Pockets of moderate convection are occurring within the NET, especially along its northern and eastern flank where it convergence is strongest as the NET is merging with an approaching trade trough. The NET will linger and meander near to southwest of Yap and Palau through midweek and will bring enhanced potential for showers and thunderstorms. Another NET stretches from northeast of Kosrae south and east across the southern Marshall Islands and ends near EQ178E. Only spotty showers within the NET, but pockets of moderate convection occurring along the northern and eastern flank of the NET where trade convergent flow is enhanced. The NET will will wash out over the next day or two and give way to a redeveloping Inter-Tropical Convergence Zone across eastern Micronesia. TRADE-WIND TROUGHS/SURGES... A series of trade troughs eakand surges in the trade wind are passing through the overall background trade pattern. One noteworthy trough well west of the Marianas is passing through western Yap State and Palau and merging with the NET. Pockets of moderate to deep convection are occurring across western Yap State and the main islands of Palau. The trade trough will continue to drift west as it merges with the NET. Another trough currently near Chuuk and Pohnpei will drift west and help enhance showers and thunderstorm potential for Yap and Palau around Tuesday and Wednesday. TUTT... A Tropical Upper-Tropospheric Trough (TUTT) enters the AOR near 17N130E and stretches southeast across the southern Marianas to north of Chuuk and Pohnpei, then stretching northeast through a TUTT cell near Wake Island, and exiting the AOR near 21N180. The TUTT is helping enhance showers near Yap and Palau. Near the TUTT cell, pockets of thunderstorms are approaching Wake Island. The TUTT looks to remain and meander, while the TUTT cell will pass over Wake Island and will approach the Marianas during the latter half of the work week. Another TUTT cell will enter the AOR and approach Wake Island late week. $$ Slagle