Forecasts are probabilistic guidance, not guarantees.
Data sources & licences
Generated using Copernicus Climate Change Service information
2026 — C3S seasonal forecasts and ERA5 reanalysis, via the
Climate Data Store, under
CC BY 4.0. Neither the European Commission nor ECMWF
is responsible for any use of this information. Non-European contributions
to the C3S seasonal multi-system are acknowledged to their originating
centres.
Sub-seasonal forecasts are from the S2S database, a
joint WWRP/THORPEX–WCRP project, via ECMWF. This site uses only the
CC BY 4.0 contributions — ECCC, ECMWF, HMCR, KMA, NCEP and
UKMO — and excludes the CC BY-NC centres, whose licence does not
permit commercial use.
Snow observations from the USDA NRCS SNOTEL network and
California DWR CDEC sensors (public domain);
NOAA GHCN-Daily (public domain); CanSWE
(Vionnet et al., ESSD 13, 4603) and Environment and Climate Change
Canada under the Open Government Licence – Canada; and the
BC Automated Snow Weather Stations under the Open
Government Licence – British Columbia. Map tiles: hillshade © Esri, labels
© OpenStreetMap contributors ©
CARTO.
Mapping by Leaflet
(BSD-2-Clause).