According to the Seek Reveal, the ground temperature was 8 *F and clouds were at -12 *F. Assuming a dry adiabatic lapse rate of 5.4 degrees per thousand feet, the clouds base was at 3,700 feet. The sky behind the clouds had a temperature of -28 *F.
It's a little foggy at NearSys Station and we are covered in overcast. A drive earlier today indicated the fog reaches no higher than 425 feet (since that's the elevation of a ridge I need to cross). Above that is clear skies. So I don't know what cloud base the thermal imager is detecting.
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjCqoEnjpOfUbUnf0nN1zq6aye-im9BxEwObZ9bqwYUNu6d1XRsDpevtjQx_vrCMEIBSoS339PyBbvSPjG3HpOScyLgRFGyFQLF0otw6BVbsbKwGzM3TOTWLRHy8ohyre1VxvVVe6yaGw/s400/3+Jan+2018.jpg) |
This is the appearance of the clouds and for overhead. |
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEg0xhM2dK6LEJ66fgKkMilcqbo-TuB99mvpPNVxZoCNHgV8rN-BxMRAE5_HqcIoM3GBEf7vNNTMvj-9LX0LQ5ZQZTwY9Gvwv_MFx35iPkPoCGGGySeLQxeGcDgyIJ3rMcHzmyVqbCXfGw/s400/3+Jan+m28F+sky.PNG) |
A thermal image of the overhead clouds and fog. |
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