Special Weather Statement - Moderate | Effective 05/21/2026 23:08

A tropical disturbance, known as JTWC's Invest 99W, is currently centered near 7N147E west of Weno, Chuuk. This system is starting to develop and is expected to move to the west-northwest as it moves through the outer islands of Yap State. The chance of this system developing into a significant tropical cyclone is rated as sub-low by Joint Typhoon Warning Center (JTWC). Current estimations has the system passing by or over Fais and Ulithi before moving northward into the Philippine Sea. This system is expected to bring numerous to widespread showers with possible heavy down pours, gusty winds and choppy seas. In addition, high uncertainty remains regarding rainfall amounts, but model trends indicate 3 to 5 inches over the next 72 hours. Yap Proper and Palau may also experience this disturbance as models are not in alignment on when the northward turn is anticipated to happen. As of this writing, combined seas are expected to become choppier, however remaining below 22 knot winds and 10 foot sea conditions. Residents are urged to pay close attention the next few days to your local emergency management, the National Weather Service Guam web page (which can be found at www.weather.gov/gum), information put out by Weather Service Offices Yap and Palau, and our social media pages.