Okay, you’re starting at KMRB. When the weather starts playing as you go airborne, what is the location ID in the weather report? Is it also MRB? Or is it for another airport? It should say right at the top of the broadcast.
There’s a well-known bug where a weather station transmitting on 124.85 hits an invisible COM3 (that seems to exist for several aircraft and happens to be tuned to 124.85) and just keeps looping until you’re out of range. The ATIS for Salinas airport (KSNS) does this all over the San Francisco Bay Area - wheels off the ground and it’s “Salinas Airport information x-ray, 0157 Zulu…” Very annoying.