The HRRR had ceilings clearing out by 16Z, while the GLAMP held onto them until at least 21Z. The UKMET kept ceilings around even later, through 23Z, and only suggested a partial clearing, if at all.
|1400 UTC run, 2200 UTC forecast of HRRR ceiling height (top left), GLAMP ceiling height (top right), and UKMET cloud cover (bottom).|
|20170814 1437 - 1637 UTC GOES-16 high resolution imagery over SFO with winds, ceilings, and ASDI flight tracking overlaid|
|20170814 1430 - 1630 UTC GOES-15 imagery with winds and ceilings overlaid|
In the end, ceilings never really cleared out, though the UKMET high resolution model did have the closet solution to reality.