POSSIBLE TROPICAL CYCLONE FORMATION LOOMING FIRST WEEK OF DECEMBER 2025 MANILA — The Philippine Atmospheric, Geophysical and Astronomical Services Administration (PAGASA) and international guidance models indicate an increasing chance of tropical cyclone formation in the western Pacific during the first week of December, with the system potentially approaching or affecting the Philippines, forecasters said Friday. If the disturbance develops into a tropical storm within the Philippine area of re

A low-pressure system moves down the West Coast, bringing stormy weather to California and snow to the Sierras. Details: This animation contains the air mass product from the GOES-18 weather satellite. It spans the 27-hour period from 12:00 UTC on 2025-10-13 to 15:30 UTC on 2025-10-14. | Cooperative Institute for Research in the Atmosphere