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 >

About the National Weather Service Portland

The National Weather Service (NWS) Forecast office in Portland maintains a watchful eye on the weather and other weather related hazards across northwest Oregon and southwest Washington. The office is staffed 24 hours per day, every day of the year.

Our Mission: The National Weather Service (NWS) provides weather, hydrologic, and climate forecasts and warnings for the United States, its territories, adjacent waters and ocean areas, for the protection of life and property and the enhancement of the national economy. NWS data and products form a national information database and infrastructure which can be used by other governmental agencies, the private sector, the public, and the global community.

Operations

	Monitoring of the only currently active volcano in the contiguous 48 states.
	One of the most active hydrologic areas in the United States
	Responsible for Forecasts and Warnings for 14 counties in northwest Oregon, 5 counties in southwest Washington, and a coastal marine area that extends from 0 to 60 miles offshore, extending from Cape Shoalwater, Washington to Florence, Oregon.

NWS Portland
Area of Responsibility

Weather Dissemination

	10 NOAA Weather Radio transmitters
	Amber Alerts and Homeland Security Alerts broadcast on NOAA Weather Radio
	Strong partnerships with media
	On our website ( weather.gov/portland )
	Social media including ( Facebook and Twitter )
	NOAA Weather Wire Service ( details... )
	Local NOAA Weather Radio information ( including other maps )...

NOAA Weather Radio Coverage Map for Salem

Public Forecasts

While the primary duty of our office is watch and warning responsibility, the majority of time is spent providing routine weather service to the public, including daily forecasts and climate services.

In addition to the standard text products, the NWS Portland produces forecasts in gridded and digital formats. These datasets comprise of the the NWS National Digital Forecast Database, which is available to all customers and partners, so that they may use the information to create a wide range of text, graphic and gridded products.

NWS Portland Info: Digital products

NWS Portland Info: Public products

NWS Portland Info: Hazardous Weather products (non-routine)

NWS Digital Forecasts

National Digital Forecast Database

Example of a Digital Forecast, a single grid of the hundreds that we produce daily.

Other Weather Data Produced

In addition to our public forecasts and warnings, we also are responsible for aviation, marine, hydrologic and fire weather services for our area.

Aviation forecasts for 7 airports and 5 air routes.

Marine forecasts/warnings for the coastal waters from 0 to 60 miles offshore, extending from Cape Shoalwater, WA to Florence Oregon.

Fire Weather forecasts/warnings for all of the local area, including the Siuslaw, Mt Hood, Gifford-Pinchot and Willamette National Forests.

NWS Portland Info: Hydrologic products

NWS Portland Info: Marine products

NWS Portland Info: Aviation products

NWS Portland Info: Tsunami products

NWS Portland Info: Fire Weather products

Northwest River Forecast Center

West Coast & Alaska Tsunami Warning Center