Model: GFS (Global Forecast System) Global Model from the "National Centers for Environmental Prediction" (NCEP)
Update: 4 times per day, from 3:30, 09:30, 15:30 und 21:30 GMT
Greenwich Mean Time: 12:00 GMT = 13:00 BST
Parameter: Kind of precipitation across the British Isles
kind of precipitation   Rain or shower? This chart shows the kind of precipitation that is likely to fall given the atmospheric and surface conditions at a certain place.

The following table explains the symbols:

Precipitation Light Moderate Heavy
Rain shower
Snow shower
Freezing rain
Cloud Cover 0-2 3-4 5-7 8