Datasets

Vorticity is the tendency of an air particle to rotate or circulate around a particular point. Relative Vorticity is a measure about a vertical axis of the local rotation or spin of the air relative...

The air flow is not the same at all levels and can be very different in strength and direction when associated with vigorous weather systems...

Uncoloured areas (relative humidity < 65%) are likely to be free of cloud. Coloured areas (relative humidity > 65%) show where moisture is likely to be available for cloud development...

This chart shows 7-day mean anomalies of wind speed and direction from the ECMWF Sub-seasonal ...