Whether or not...

[Let'sgoflying!]

there is weather:

See sat images.
Both taken a few moments ago from the adds site.
One is the single image, B&W, IR option
The other is the 'Western USA' with reporting station overlays.

The second is getting a return in the area of interest (circled), the first shows mostly clear.
Why the difference? Both have time stamps exactly as shown, 7:00am CDT.

 

[DouglasBader]

Use radar data. A visible view gives you a ballpark rough picture of what's there; radar tells you much more.

 

[Let'sgoflying!]

there was nothing on radar in that area, that time+day (despite the sigmet) however I agree with the concept of using several data inputs to form a conclusion.

 

[DouglasBader]

But it doesn't see clouds.

It sees clouds that count.