WNG655: NOAA Weather Radio for Contra Costa County, California
WNG655 is the NOAA Weather Radio transmitter at Contra Costa County (transmitter at Mt. Diablo), broadcasting on 162.425 MHz at 100 watts. It carries the National Weather Service San Francisco office's broadcast and covers 2 counties, each listed below with the SAME code an alert radio needs to wake for that county and stay quiet for the rest.
| Callsign | WNG655 |
|---|---|
| Frequency | 162.425 MHz |
| Transmitter | Contra Costa County (transmitter at Mt. Diablo), California |
| Power | 100 watts |
| Forecast office | NWS San Francisco |
| Status | Normal (NWS data, July 2026) |
Marine radios often label 162.425 MHz as WX4, but WX channel numbers vary by brand - go by the frequency.
Counties WNG655 covers
| County | State | SAME code |
|---|---|---|
| Alameda | California | 006001 |
| Contra Costa | California | 006013 |
Program the six-digit code into your radio's SAME location list - the SAME code guide walks through it, and how alert radios work explains what the radio does with it.
Hearing WNG655
Any receiver that tunes 162.425 MHz FM can listen: scanners, VHF ham radios, marine sets, or a software-defined receiver. What those do not do is wake you at 3 a.m. - for that you want a dedicated radio with SAME alerting, covered in the buyer's guide.
Every California transmitter, county and SAME code: NOAA Weather Radio in California. Or look any county up with the finder.
Sources:
- “NWR County Coverage Listings”. weather.gov. Archived from the original on 2026-07-19. Retrieved 2026-07-16. Every figure on this page - frequency, transmitter site, power, operational status, and county SAME codes - is from this dataset. Transmitters move, change power, and go down for maintenance; verify locally before you rely on it.