Special Weather Statement - Moderate | Effective 05/26/2026 15:47

A tropical disturbance, known as JTWC's Invest 99W, is currently centered near 9N137E, southwest of Yap Proper. Invest 99W continues to slowly improve in organization as the eastern half of the broader circulation begins to pivot to a more northeast to southwest orientation instead of an east to west orientation. This will allow for 99W to begin consolidating over the next few days. The JTWC has increased 99W to HIGH, which means development into a tropical cyclone is likely within 24 hours. Numerous to widespread showers and isolated thunderstorms are seen along the southern, eastern, and northern peripheries of 99W. Heavy rainfall and gusty winds are expected across much of Palau and western Yap State, including Yap Proper this week. As Invest 99W lifts northward this week, the developing monsoon tail will continue to intensify on the south side. Westerly to southwesterly winds of 20 to 30 kt with gusts peaking near 40 kt are expected along with seas hazardous to small craft and hazardous surf. A large band of heavy showers are closing in across Palau from the south, along a surge in monsoon west-southwesterlies. For Yap, deepening convection is building in across the area as Invest 99W gradually consolidates nearby. Seas expected to build to over 10 feet through Friday morning. As the system shifts further north- northwest, the monsoon tail may transition into an inflow tail with southerly flow. This will bring hazardous sea and surf conditions to Yap and Palau's coastal waters through late this week.