####018000499#### WWGM80 PGUM 230430 AWWGUM GUZ001-230530- Airport Weather Warning for Guam International Airport National Weather Service Tiyan GU 230 PM ChST Tue Sep 23 2025 A Thunderstorm Advisory is in effect for the Guam International Airport until 330 pm this afternoon. Thunderstorms are occurring within 20 nautical miles of the airport, mainly to the west. Be alert and take precautions as required. These storms have been producing occasional lightning. $$ Aydlett