National Weather Service United States Department of Commerce

Heavy Rainfall to Bring Flooding Threat to California; Heavy Snow in the Sierra

A strong atmospheric river will bring heavy rainfall to California through the holiday week. The heaviest rainfall is expected on Wednesday in the Los Angeles Basin. Flash and urban flooding is possible. A prolonged heavy snowfall is expected in the Sierra Nevada from the atmospheric river, raising concerns for major snow‐load impacts. Travel may be difficult to impossible over the passes. Read More >

Tiyan, GU

Weather Forecast Office

Marianas

Weather.gov > Tiyan, GU > Marianas

There are no additional products and bulletins for Guam and the Marianas Islands.

Current Conditions

Surface Weather Observations at: Antonio B. Won Pat Guam Intl. Airport (PGUM) - AAFB (PGUA)

Surface Weather Observations at  Benjamin Taisacan Manglona Rota Intl. (PGRO)

Surface Weather Observations at Francisco Manglona Borja Tinian Intl. (PGWT)

Surface Weather Observations at Francisco C. Ada Saipan Intl. (PGSN)

Rawinsonde Observation Mandatory Levels   Issued: 12/23/2025 02:00:54 PM UTC

Rawinsonde Observation Significant Levels   Issued: 12/23/2025 02:00:54 PM UTC

Rawinsonde Data Above 100 Millibars   Issued: 12/23/2025 02:00:57 PM UTC

Freezing Level Data (RADAT)   Issued: 12/23/2025 02:00:35 PM UTC

Tropical Weather Discussion   Issued: 12/23/2025 04:11:00 PM UTC

Regional Weather Roundup   Issued: 12/24/2025 12:00:00 AM UTC

 

Aviation Products

PGUM METAR - PGUA METAR - PGRO METAR - PGWT METAR - PGSN METAR

Guam  Terminal Aerodrome Forecast   Issued: 12/23/2025 07:31:54 PM UTC

Rota  Terminal Aerodrome Forecast   Issued: 12/23/2025 11:55:35 PM UTC

Tinian  Terminal Aerodrome Forecast   Issued: 12/23/2025 11:56:35 PM UTC

Saipan  Terminal Aerodrome Forecast   Issued: 12/23/2025 07:31:54 PM UTC

 

Public & Marine Products

Zone Forecast Product   Issued: 12/23/2025 07:45:00 PM UTC

Coastal Waters Forecast   Issued: 12/23/2025 08:48:00 PM UTC

Surf Forecast   Issued: 12/23/2025 09:14:00 PM UTC

Tides: Apra Harbor Guam - Tanapag Harbor, Sapian

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Radar

 

_______________________________________________________________________

National Weather Service
Guam Weather Forecast Office
3232 Hueneme Road Barrigada, Guam 96913
Phone Number: (671)472-0900
Recorded Forecast: Dial 211

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