-took this photo after a descent from 16.5k to 1,500 ft.
OAT went from 42 to 94 degrees.
High Pressure gauge is pegged at 2,000+ psi
-Didn't get a photo, but the opposite happened on the ramp in Spokane. After sitting for an hour, the low pressure gauge was pegged at 1,200 psi+. Spokane might not be the warmest spot in the country, but at 85 deg F, it was 55 degrees warmer than the cold soak on the previous leg.
Temperature changes have a big impact on system pressure.