Western Pacific Information from JTWC, the Joint Typhoon Warning Center (US Navy & US Air Force) at Nimitz Hill near Agana, Guam. Plus a link to the National Weather Service office at Tiyan, Guam (next to Agana) with hourly GMS images along with forecasts and warnings.

Cyclone information from the Joint Typhoon and Weather Center
Current Western Pacific Outlook from JTWC/Guam
W Pacific Ocean cyclone formation alert
Most Recent Tropical Cyclone track plot.
NWS at Tiyan, Guam, with hourly GMS (125E-162E;0N-27N) and forecasts.