Foehn gap and orographic crest cloud downwind of the Sierra Nevada
![](https://cimss.ssec.wisc.edu/satellite-blog/images/2024/01/ca_wv-20240106_220118.png)
GOES-18 Mid-level Water Vapor (6.9 µm) images, with pilot report (PIREP) plots of turbulence [click to play animated GIF | MP4]
The corresponding GOES-18 “Clean” Infrared Window (10.3 µm) images are shown below.
![](https://cimss.ssec.wisc.edu/satellite-blog/images/2024/01/ca_ir-20240106_220118.png)
GOES-18 “Clean” Infrared Window (10.3 µm) images, with pilot report (PIREP) plots of turbulence [click to play animated GIF | MP4]
![](https://cimss.ssec.wisc.edu/satellite-blog/images/2024/01/240106_2106utc_goes18_waterVapor_pirep.png)
GOES-18 Water Vapor image at 2106 UTC, with a Pilot Report of a Mountain Wave at 2105 UTC [click to enlarge]
![](https://cimss.ssec.wisc.edu/satellite-blog/images/2024/01/240106_2131utc_goes18_waterVapor_pirep.png)
GOES-18 Water Vapor image at 2131 UTC, with a Pilot Report of a Mountain Wave at 2131 UTC [click to enlarge]
![](https://cimss.ssec.wisc.edu/satellite-blog/images/2024/01/240106_2206utc_goes18_waterVapor_pirep.png)
GOES-18 Water Vapor image at 2206 UTC, with a Pilot Report of Moderate to Severe Turbulence at 2208 UTC [click to enlarge]