Weather
MWIS – Mountain Weather Information Service
Mountain Forecast – Provides International weather forecasts and mountain specific data
yr.no – Norwegian based forecast provider (Worldwide)
Wunderground – Complete weather information site
Winter Conditions
SAIS – Scottish Avalanche Information Service
EAWS – European Avalanche Warning Services
Snow Forecast – Snow forecast for 3 days in advance
Lakes Weatherline – Latest Lakes weather and fell conditions
TheFrontPoint – UK winter climbing and skiing conditions
Government
FCO – Up to date travel / security information
Medical
Medex – Expedition 1st Aid
ISMM – International Society for Mountain Medicine
Christopher Imray– High Altitude Medicine
Associations
BMC – British Mountaineering Council
BAIML – British Association of International Mountain Leaders
UIMLA – Union of International Mountain Leader Associations