The SOLRAD station in Seattle is located on a rooftop at NOAA's campus on the shore of Lake Washington.

Seattle, Washington
Latitude: 47.68 degrees North
Longitude: 122.25 degrees West
Elevation: 20 meters
SOLRAD data from the Seattle site.
Location of SOLRAD site at Seattle, WA
Seattle SOLRAD station
The SOLRAD station in Seattle, Washington, located near the shore of Lake Washington.
Seattle SOLRAD station solar tracker
Instruments mounted on the Seattle solar tracker include, from left to right, a total solar pyranometer, a diffuse pyranometer, and a UV-B Biometer.
Seattle SOLRAD station
Another view of the SOLRAD tracker, looking inland.