At altitudes above the free air freezing level, precipitation falls as snow and quantity is
approximately ten times the water equivalent. That is, 1 mm rain corresponds to about 1 cm snow.
However, the distance to which snow falls below the free air freezing level can vary between a
few tens of metres and about 1000 metres, depending upon certain weather conditions. This snow
level will be indicated in the worded part of the forecast.
Indication of severe gale may be found in the spot forecasts and/or the worded forecasts.
The precipitation amount is for the 6 hours up to the hour, i.e. at 3pm it will be the total accumulation from 9am until 3pm.