|Forecast Cloud Cover at Noon Monday Eclipse Day|
Satellite photo taken at 0800 MDT Monday August 21 2017
|NAM model of the percentage of forecast cloud cover at noon Monday August 21 2017.|
|NAM 300 MB forecast for noon Monday August 21 2017|
|Vertical forecast sounding vicinity Star Valley noon August 21 2017(green dewpoint, red temperature)|
|Forecast of percentage sky cover for noon Monday from the GFS Model|
|GEFS forecast of percentage cloud cover for Noon Monday|
|NAM forecast of percentage cloud cover at Noon Monday 8/21/17|
|Forecast of 300 MB humidity at Noon Monday.|
The next chart is the forecast relative humidity at 700 MB, or about 10,000 above sea level. This suggest that moisture for clouds will be above 700 MB and most likely at the cirrus level.
|Percent of cloud coverage forecast from the GFS model for noon Monday August 21 1917|
|Cloud Cover Total (%) valid at Noon Monday August 21 2017|
This forecast suggests that the area from Oregon into Idaho has a good chance of favorable eclipse viewing conditions, with some concern for cloud cover over much of Wyoming.
Again this is still 5 days out, and forecasting cloud cover is little better than a crap shoot at that range.
Below is the model forecast from 24 hours earlier for the eclipse time of noon Monday.