If any of my users live in Washington, Oregon, Nevada, or California, this is the place for you. This page contains marine forecasts, earthquake information, and beach forecasts (in the summer) in addition to traditional weather forecasts. The minimum magnitude for earthquakes will be a 2.0 on the Richter scale.
http://www.wrh.noaa.gov/lox National Weather Service Los Angeles / Oxnard, CA
http://www.wrh.noaa.gov/sew National Weather Service Seattle, WA
http://www.wrh.noaa.gov/vef National Weather Service Las Vegas, NV
http://www.wrh.noaa.gov/rev National Weather Service Reno, NV
http://www.wrh.noaa.gov/mtr National Weather Service San Francisco Bay Area
http://www.wrh.noaa.gov/pqr National Weather Service Portland, OR
http://www.wrh.noaa.gov/sto National Weather Service North Central California