From the US National Weather Service Raleigh NC on Facebook:

The smoke plume from the fire at Pinnacle Apartments at Crabtree in North Raleigh Saturday afternoon was evident in radar imagery from both the National Weather Service Weather Surveillance Radar in Clayton (KRAX) and the FAA Terminal Doppler Weather Radar near RDU (TRDU). The radar loop shown here is from TRDU.

Here’s a screen capture: