Where Did NCPR Go—and Who Is That?

If you find that NCPR has disappeared, and some other station is coming in instead—you may be experiencing the results of a process known technically as tropospheric ducting, caused when a layer of cold air traps a layer of warm air near the ground over a wide area. Our listeners have heard from stations as far away as Iowa and Minnesota (and their listeners have heard us). This occurs mostly during nighttime hours, cannot be fixed, and is of unknown duration. More on tropospheric ducting.

This has been an alert from Radio Bob.

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