WWGM80 PGUM 250345 AWWGUM GUZ001-250645- Airport Weather Warning for Guam International Airport National Weather Service Tiyan GU 145 PM ChST Sat Oct 25 2025 A Thunderstorm Advisory remains in effect for the Guam International Airport until 445 pm this afternoon. Thunderstorms are possible or occurring within 20 nautical miles of the airport. Be alert and take precautions as required. These storms have been producing occasional lightning. $$ Bowsher