Thursday, August 10. Shane arrived at field site shortly after 9 AM. Started REAL scanning at 9:38 AM PDT. Aerosol backscatter intensity about the same as yesterday.
Winds northerly overnight so REAL was shut down from 11:17 PM PDT on 8/9 until this morning. Winds this morning very light. Mostly clear and sunny. Some clouds starting to appear to the south late morning:
East to south panorama at 11:00 AM PDT:
Starting to see gust structures around 11:54 AM PDT:
Eastern panorama at 12:17 PM PDT
Eastern panorama at 4:02 PM PDT
Note: transient electrical power fault at 4:10 PM PDT. UPSs stepped in and REAL still running OK.
At about 5:52 PM PDT I noticed the leading edge of a gust front on the LidarPPI real-time display. These images are of unfiltered backscatter intensity, and the bright green region moving toward us from the east is high backscatter intensity air associated with windy conditions that raise dust into the air. There was lots of virga but felt only a very few small drops occasionally over the next 1.5 hours. (Note: I'm just putting frames every couple minutes apart, but we do have frames every 17 s of this sequence.)
Here's the photo from 5:57 PM looking to the east:
Here are some high-pass median filtered images as the front reached the linear array:
And here are a few vector wind fields that were derived in real-time. These are just the ones that I could save quick look images while watching. Post-processing with generate a smooth sequence of frames, and a vector at every pixel.
As the sun fell in the west, the most beautiful double rainbow appeared off to the east. The photos I took don't capture the stunning beauty of the scene which lasted for over an hour until I left the site at about 7:30 PM PDT.
Shut system down from hotel at 11:15 PM PDT. At that time the flow was from the east and northerly flow was forecast to take over and remain through tomorrow morning.
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Unknown User (shane)
Thursday, August 10. Shane arrived at field site shortly after 9 AM. Started REAL scanning at 9:38 AM PDT. Aerosol backscatter intensity about the same as yesterday.
Winds northerly overnight so REAL was shut down from 11:17 PM PDT on 8/9 until this morning. Winds this morning very light. Mostly clear and sunny. Some clouds starting to appear to the south late morning:
East to south panorama at 11:00 AM PDT:
Starting to see gust structures around 11:54 AM PDT:
Eastern panorama at 12:17 PM PDT
Eastern panorama at 4:02 PM PDT
Note: transient electrical power fault at 4:10 PM PDT. UPSs stepped in and REAL still running OK.
At about 5:52 PM PDT I noticed the leading edge of a gust front on the LidarPPI real-time display. These images are of unfiltered backscatter intensity, and the bright green region moving toward us from the east is high backscatter intensity air associated with windy conditions that raise dust into the air. There was lots of virga but felt only a very few small drops occasionally over the next 1.5 hours. (Note: I'm just putting frames every couple minutes apart, but we do have frames every 17 s of this sequence.)
Here's the photo from 5:57 PM looking to the east:
Here are some high-pass median filtered images as the front reached the linear array:
And here are a few vector wind fields that were derived in real-time. These are just the ones that I could save quick look images while watching. Post-processing with generate a smooth sequence of frames, and a vector at every pixel.
As the sun fell in the west, the most beautiful double rainbow appeared off to the east. The photos I took don't capture the stunning beauty of the scene which lasted for over an hour until I left the site at about 7:30 PM PDT.
Shut system down from hotel at 11:15 PM PDT. At that time the flow was from the east and northerly flow was forecast to take over and remain through tomorrow morning.