Several years ago, WQUN AM Hamden, CT (owned then by Quinnipiac University) was attempting to sell. They used NOAA's Meriden, CT's weather transmission for a couple of weeks, from a May 2021 New Haven Register story:
"WQUN went silent in May 2019 and Quinnipiac officials had a year to sell the station to someone who would return the station to the air or risk losing control of the license. After buying some extra time with the FCC by broadcasting National Weather Serice reports for a couple of weeks, Quinnipiac officials announced they had signed a letter of intent to sell the license to what then was an unidentified buyer, later revealed to be Smidt."