Here is Boulder's Clear Sky Clock:

Image courtesy of Attilla Danko, based on model data generated at the Canadian Meteorological Center.

Here is the cloud cover forecast for tonight:

Current Satellite Image Combined with Surface Data:

Current Satellite Images

Weather Forecast Selection Matrix

The cells of the matrix below are links to current computer-generated forecast models. Please click on a cell to see that forecast. Descriptive information for the Eta and Avn forecasts can be found by selecting the Unisys link below. Information on the CRAS cloud model can be found by selecting the CRAS link below.

If a link brings up a blank page, it means the forecast is being updated. Please wait at least ten minutes, then try again.

The Eta forecast is updated every 12 hours at approximately 8:45 MST (2:24 UT). The Aviation (AVN) forecast is updated every 12 hours at about 1:20 MST (7:20 UT). The CRAS forecast (which forecasts cloud cover) is updated once every 24 hours.