Oceanographic models

SMHI's oceanographers use a number of oceanographic models. Some of the operational models are listed here together with the models that are being developed by SMHI’s research department. An operational model is one that is run regularly as part of the daily forecasting routine.


HIROMB (High Resolution Operational Model for the Baltic Sea) is the ocean circulation model used operationally at SMHI. HIROMB forecasts sea level, currents, salinity, temperature, ice thickness, ice concentration and ice drift. HIROMB covers the entire Baltic and North Sea as far west as the English Channel, with resolutions varying from 900 metres to 3 nautical miles (about 5.5 km).


The HYPNE (Hybrid Parametrical Shallow Water Nested) wave model is a second generation wave model used by SMHI for wave forecasting. The model covers the North Sea and the entire Baltic.


HIRLAM (High Resolution Limited Area Modelling System) is the main tool used for short term weather forecasts (up to 48 h) at SMHI. The model covers the whole of northern Europe and the North Atlantic. The results from HIRLAM are used as input data for HIROMB and HYPNE.

Research and development: SCOBI; HIROMB, PROBE & RCO

SMHI’s oceanographic research department principally focuses on developing four models: HIROMB, SCOBI, (Swedish Coastal and Ocean Biogeochemical) and PROBE (Program for Boundary Layers in the Environment). SCOBI is a biogeochemical model and PROBE is a one-dimensional model for calculating currents, temperature and salinity in the water column.