WXK81: NOAA Weather Radio for Onondaga, Michigan
WXK81 is the NOAA Weather Radio transmitter at Onondaga (transmitter at Rossman Rd.), broadcasting on 162.400 MHz at 1000 watts. It carries the National Weather Service Grand Rapids office's broadcast and covers 9 counties, each listed below with the SAME code an alert radio needs to wake for that county and stay quiet for the rest.
| Callsign | WXK81 |
|---|---|
| Frequency | 162.400 MHz |
| Transmitter | Onondaga (transmitter at Rossman Rd.), Michigan |
| Power | 1000 watts |
| Forecast office | NWS Grand Rapids |
| Status | Normal (NWS data, July 2026) |
Marine radios often label 162.400 MHz as WX2, but WX channel numbers vary by brand - go by the frequency.
Counties WXK81 covers
| County | State | SAME code |
|---|---|---|
| Branch | Michigan | 026023 |
| Calhoun | Michigan | 026025 |
| Clinton | Michigan | 026037 |
| Eaton | Michigan | 026045 |
| Hillsdale | Michigan | 026059 |
| Ingham | Michigan | 026065 |
| Jackson | Michigan | 026075 |
| Livingston | Michigan | 026093 |
| Shiawassee | Michigan | 026155 |
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.
A radio that will use this code
WXK81 alerts are only useful inside a radio you can program the s codes above into. Two that do it, for two different jobs.
At home, always on
Midland WR120B. Mains desk radio with battery backup. Program the SAME code from the table and it stays silent until your county specifically is warned, then wakes you.
Check current price (Amazon)In the bag or the car
Midland ER310. Crank, solar and USB, with a flashlight. Receives WXK81 the same as anything else; it does not do SAME alerting. The one still working on day three of an outage.
Check current price (Amazon)Hearing WXK81
Any receiver that tunes 162.400 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 Michigan transmitter, county and SAME code: NOAA Weather Radio in Michigan. 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.