NIMH issues its forecasts on the basis of numerical models, measurements, radar and satellite data.

The main numerical model for a short-range forecast is ALADIN.

ALADIN is a spectral model for regional forecast of meteorological fields and elements. Its development is being done by a consortium of 16 member countries with Meteo France as a leading partner.

The parameters of its operational implementation in NIMH are the following:

• mesh size 7000 m,
• 70 vertical levels,
• time-step 300 s.
• Model integration is performed twice daily - at 06 and 18 h UTC, and the result is a 72-hour forecast for a region centered over Bulgaria

The implementation and development of the model in NIMH is done by a group of scientists from the Information centre of NIMH.