RTMA – “Real Time Mesoscale Analysis”

The RTMA is run every 15 minutes and is available 15 minutes afterwards. It is basically an almost live, real time data input for the models and includes such things as current temperature, cloud cover, pressure and previous hour’s rainfall.

Each RTMA is converted six hours later to a more verified data form, the “URMA”, used for true model performance verification and NBM model guidance.