Last updated: 19 Apr 2021 | Recent visits: 1 C EMS-RM Tropical Cyclone MANGKHUT-18 in Northern Mariana Islands and Guam (2018-09-10) Activation time (UTC): 2018-09-10 02:56:00 Event time (UTC): 2018-09-10 00:00:00 Event type: Storm (Tropical cyclone, hurricane, typhoon) Activation reason: Tropical Cyclone MANGKHUT-18 is gaining strength and will strike Guam and parts of the Northern ... WEB DWN GEO