Re: 10:19am CDT Vortex: 947mb, 6kts of sfc wind; Single 18nm closed eye; Higher flight winds
Posted by Chris in Tampa on 8/25/2017, 1:53 pm
Looking for a second wind maximum, concentric eyewalls. This post kind of goes nowhere. I thought the images I created might be a little more clear. Feel free to ignore!

NOAA's Peak 10 second flight level winds:



NOAA:

A. Time of Center Fix: 25th day of the month at 4:19:51Z
L. Eye Character: Open in the southeast, SE
M. Eye Shape: Concentric (has an inner and outer eye)
M. Inner Eye Diameter: 10 nautical miles (12 statute miles)
M. Outer Eye Diameter: 20 nautical miles (23 statute miles)

A. Time of Center Fix: 25th day of the month at 5:04:00Z
L. Eye Character: Open in the southeast, SE
M. Eye Shape: Concentric (has an inner and outer eye)
M. Inner Eye Diameter: 10 nautical miles (12 statute miles)
M. Outer Eye Diameter: 20 nautical miles (23 statute miles)

A. Time of Center Fix: 25th day of the month at 6:03:58Z
L. Eye Character: Open in the south, S
M. Eye Shape: Concentric (has an inner and outer eye)
M. Inner Eye Diameter: 10 nautical miles (12 statute miles)
M. Outer Eye Diameter: 20 nautical miles (23 statute miles)






Air Force's Peak 10 second flight level winds:

My site can only generate 6 hours of data in a row, so here is the first part:



And second center pass as well, and on:



Air Force:

A. Time of Center Fix: 25th day of the month at 8:49:50Z
L. Eye Character: Open in the southwest, SW
M. Eye Shape & Diameter: Circular with a diameter of 12 nautical miles (14 statute miles)

A. Time of Center Fix: 25th day of the month at 9:56:10Z
L. Eye Character: Closed
M. Eye Shape & Diameter: Circular with a diameter of 11 nautical miles (13 statute miles)

A. Time of Center Fix: 25th day of the month at 11:22:30Z
L. Eye Character: Open in the southeast, SE
M. Eye Shape & Diameter: Circular with a diameter of 12 nautical miles (14 statute miles)

A. Time of Center Fix: 25th day of the month at 13:00:40Z
L. Eye Character: Not Available
M. Eye Shape: Concentric (has an inner and outer eye)
M. Inner Eye Diameter: 12 nautical miles (14 statute miles)
M. Outer Eye Diameter: 28 nautical miles (32 statute miles)

A. Time of Center Fix: 25th day of the month at 14:14:40Z
L. Eye Character: Closed
M. Eye Shape: Concentric (has an inner and outer eye)
M. Inner Eye Diameter: 12 nautical miles (14 statute miles)
M. Outer Eye Diameter: 28 nautical miles (32 statute miles)

A. Time of Center Fix: 25th day of the month at 15:15:20Z
L. Eye Character: Closed
M. Eye Shape & Diameter: Circular with a diameter of 18 nautical miles (21 statute miles)



I have the time of the center fixes and how the vortex message described the eye.

Flight paths are odd sometimes. So I took a look at NOAA's and Air Force this morning.

For the Air Force plane at around 10:00Z and 14:15Z, the plane did a little circle. Elsewhere, you can see straight shots to and from the center for the most part, even if they didn't go directly across into the opposite quadrant. There are multiple wind maximums in some of them. Some are more pronounced than others. I put how Air Force and NOAA described each.

Air Force at 13Z is very pronounced.

You can see from the times the eye is described where a center pass was.

Other peaks and valleys were mostly far from the eye and reflected how far they went from the center and how they turned to go to other quadrants.

NOAA was finding concentric eyes, even though they always had the same diameters. But Air Force didn't at first. But raw recon seems like it may have indicated that. Second pass NHC did a little loop, so that might have confused things perhaps.

Some of the other data types also had what may have indicated concentric eyewalls, but it seemed less pronounced.

The last Air Force pass noted had a pretty expected wind profile as the plane exited in the NE quadrant, where the highest winds were. That pass was from NW to center and then to NE. I guess the NW quadrant could have been a bit more steady increasing.

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10am CDT Friday: 110mph; 947mb; NW at 10mph - Chris in Tampa, 8/25/2017, 11:00 am
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