MDL has begun producing test AVN MAV alphanumeric messages containing QPF guidance. These test messages are being produced in anticipation of a mid-July implementation. The QPF guidance will be available via the operational alphanumeric text bulletin, and the BUFR messages. You can view these test message via our Products page at,

in the AVN MOS (MAV) portion of the table. More information will be posted soon regarding the details of the guidance, and the scheduled date of implementation.