Tuesday, April 3, 2018

Cloud Height Estimation for NearSys Station, 3 April 2018

NearSys Station was 100% overcast with stratus, altostratus I believe. The sun wasn't visible through the clouds, but it did create a brightened circle.

The thermal imager reported the ground temperature was 42 F and the cloud temperature was -5 F. The weather station reported the air temperature was 56 F and the dew point was 23 F. Assuming a dry adiabatic lapse rate of 5.4 degrees per 1,000 feet, the cloud height was between 6,100 and 8,700 feet.

Thermal image of the altostratus over NearSys Station. More detail is visible in long-wave infrared.

Visible image of the same clouds

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