The Fawbush-Miller (FB) hail forecast method was modified and implemented as a computer algorithm to design an objective hail size forecasting method. The mesoscale Eta model output is introduced in the FB computer algorithm. Four severe summertime weather events are examined, with 3 events producing large hail stones and the results are close to reality in each of the cases. This suggests it is possible to forecast large hailstones associated with severe convective weather in the Benelux 2 countries. The modified FB-technique shows skill for hail forecasting in warmest half of the year.