WWH27: NOAA Weather Radio, Plymouth

162.425 MHz · 100 W · On the air

WWH27 broadcasts NOAA Weather Radio on 162.425 MHz (WX4 on most receivers) from Plymouth, with the transmitter at Sillusi Butte, Washington, at 100 W. The National Weather Service office in Pendleton, OR programs it. It covers 2 counties.

The transmitter and its neighbors

WWH27 (the largest dot) and the transmitters within 100 miles, colored by their status now.

On the air
Degraded
Off the air

The transmitter

Call sign: WWH27
Frequency: 162.425 MHz (WX4)
Power: 100 W
Status: On the air
Station: Plymouth
Transmitter site: Sillusi Butte
State: Washington
NWS office: Pendleton, OR
Location: 45.9803, -119.2959

Counties covered

Program a SAME receiver with the code of your county. Coverage is NWS’s note of the part of a county the signal reaches.

County	State	SAME code	Coverage
Morrow	Oregon	041049	Whole county
Umatilla	Oregon	041059	Whole county

Nearby transmitters

Weather radio in Washington Every transmitter The forecast here Alerts in force in Washington

Sources

Transmitters, status and county coverage from the National Weather Service’s NOAA Weather Radio county coverage listing (data). Public domain. Read September 27, 2026 at 12:35 AM UTC; held for an hour. Original at weather.gov. Report an outage to NWS at weather.gov/nwr.