Atmospheric River Bringing Heavy Rain to Southern California and Heavy Snow to the Sierra Nevadas

A strong atmospheric river will continue heavy rain over southern California through Friday. The heaviest rainfall is ongoing today in the Los Angeles Basin. Flash and urban flooding is possible. A prolonged heavy snowfall has begun over the Sierra Nevada Mountains and will continue through Friday. Travel will become increasingly difficult over the passes due to snow and strong winds. Read More >

Click a location below for detailed forecast.

Last Map Update: Thu, Dec 25, 2025 at 1:00:05 am ChST

Watches, Warnings & Advisories

Zoom Out

There are no watches, warnings, or advisories at this time.

Marianas Text Product Selector

Eastern Micronesia Text Product Selector

Western Micronesia Text Product Selector

Tropical Cyclone Text Product Selector

Additional products or bulletins for areas within Micronesia:
* Coastal Hazard Message for Pohnpei, Kosrae or Majuro *
* Coastal Hazard Message for Palau, Yap, or Chuuk *

Guam Visual Satellite Imagery

Guam Radar

Radar Status (FTMGUA)

                        
031
NOUS60 PGUM 190220
FTMGUA
Message Date:  Dec 19 2025 02:20:24

WSR 88D HAS RETURNED TO SERVICE. WFO GUM

US National Weather Service Guam

You can also follow us on X:

Follow @NWSGuam

Public Forecast

Marine Forecast

Radar

Satellite

Area Forecast Discussion

Active Tropical Cyclones

Palau Sector

Yap Sector

Marianas Sector

Chuuk Sector

Pohnpei/Kosrae Sector

Marshall Islands Sector

GUM RSS Feed

Atmospheric River Bringing Heavy Rain to Southern California and Heavy Snow to the Sierra Nevadas

NWS Forecast Office - Tiyan, Guam

Radar Status (FTMGUA)