USNIC Interactive Multisensor Snow and Ice Mapping System (IMS) NCEI Regional Snowfall Index (RSI) National Operational Hydrologic Remote Sensing Center (NOSHRC) MODIS and VIIRS Snow and Ice Global Mapping Project NOAA OSPO Global Multi-sensor Automated Snow and Ice (GMASI) Spring Snow Cover Indicator at Climate.us Rasmussen & Libbrecht Collection of Snow Crystal Photos
Canadian Cryospheric Information Network Environment Canada SST anomalies and Snow Cover Alaska-Pacific River Forecast Center Alaska Snow Data
NOAA OSPO Global Multi-sensor Automated Snow and Ice (GMASI)
National Snow and Ice Data Center (NSIDC) Snow and Ice at the National Centers for Environmental Information (NCEI) European Space Agency (ESA) GlobSnow Global Cryosphere Watch: Snow (World Meteorological Organization)