Hemispheric Scale Analysis using the Dynamic Tropopause pressure.
Tropical Tidbits site with the same information.
Geostationary IR imagery for the continental US, Atlantic and Pacific Oceans, and South America. GOES 16 East.
Geostationary IR imagery for the western US, and Pacific Ocean. GOES 18 West.
These show troughs (dark blue) and ridges (orange/red) and upper level winds.
Tropical Tidbits shows sea level pressure too.
Understand the dominant wave patterns impacting the western US from these data.