One of the advantages of night shifts in the office park is seeing quiet sunrises from high atop, when time permits a quick break to zip on up. Fortunately that was the case here, as two rooftop observers were blessed with this sight: a streaky plume of convective cirrus, producing a small mammatus belt and trailing virga across the northeastern sky, spotlit by a slit of sunlight evading cloud cover in the southeast.
Norman OK (14 Dec 17) Looking NE
35.1818, -97.4398