Seasonal Outlooks

The odds for the next few months as a whole. A seasonal outlook cannot say whether a given storm will deliver, but it can tilt expectations for the winter: a little warmer or colder, a little wetter or drier.

ECMWF seasonal (SEAS5)

The ECMWF seasonal system gives the odds for the next few three-month seasons. Pick a season to compare temperature, precipitation and the 500 hPa pattern, or pick a product to compare the seasons.

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Climate Prediction Center (NOAA)

The CPC three-month outlook for the first lead period (the next three-month season), for temperature and precipitation.

CPC seasonal temperature outlook, first lead — Seasonal temperature outlook

CPC seasonal precipitation outlook, first lead — Seasonal precipitation outlook

Source: NOAA Climate Prediction Center. The written discussion explains the reasoning behind the maps.

CW3E (UC San Diego)

CW3E seasonal products for the cold season will appear here when they start up.

What we plan to add

Our winter outlook

A written outlook for the Cascades each season, tied to the teleconnections and to what these patterns have meant for the Cascades in the past.

Terms of Use and Data Disclaimer

Use at your own risk. The forecasts, model output, observations and plots on this site are for general information and research. They are not intended to support operational decisions. Much of the data comes from outside providers (NOAA, CW3E at UC San Diego, the University of Utah, the University of Washington, NRCS, NWAC and others), and some of it is our own analysis. Everything is provided “as is.”

In no event shall Cascade Mountain Weather or the data providers be liable for any damages, including, without limitation, damages resulting from lost data or revenue, the costs of recovering or substituting data, claims by third parties, or any special, incidental or consequential damages, arising out of the use of the data. The accuracy and reliability of the data are not guaranteed or warranted in any way, and we and the providers disclaim liability of any kind, including liability for quality, performance, merchantability and fitness for a particular purpose, arising out of the use of, or inability to use, the data.

Mountain weather and snow conditions change quickly and can be dangerous. Check the NWAC avalanche forecast and make your own decisions.