Description of the upgrade

The humidity analysis was modified. The precipitable water content is now used in the atmosphere as observed from space and reported in the satellite data. Furthermore, the procedures for using bogus humidity data derived from synoptic surface reports - dew point, cloud amounts - were used in a modified way. The changes had modest but consistent positive impact on the temperature forecast in the free atmosphere and results in a more realistic forecast of the precipitation amount.

Implemented: 11 March 1986