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DB Cooper / Re: General Questions About The Case
« Last post by Robert99 on July 07, 2023, 12:43:39 PM »Tom posted the NOAA data on here. Go look at page 117 of the Flight Path thread. He posted images there. It clearly shows a consistent southerly wind. It does not support your claim that the wind was blowing directly from the southeast to the northeast.
It’s also important to note that this data was collected in Salem, OR and Quillayute Airport in Forks, WA which is a distance of over 200 miles. The DZ would fall somewhere in this large swath of space. The wind speed and direction would be mere extrapolations and not exact representations of the winds aloft near the DZ.
Moreover, in the recent FBI Vault release, there was a segment on weather data provided to the FBI by the US Weather Bureau. This weather data included multiple reporting stations along the West Coast. The data provided was from 7pm, 8pm, and 9pm on the date of the hijacking. The closest reporting stations to any reasonable DZ would be Portland International, Troutdale Airport, and Toledo, WA.
Here is that wind data:
Time.
7pm
Toledo. 160 degrees at 4 knots
PDX. 130 degrees at 4 knots
Troutdale. 170 degrees at 3 knots
8pm
Toledo. 190 degrees at 5 knots
PDX. 270 degrees at 10 knots
Troutdale. 220 degrees at 7 knots
9pm
Toledo. 190 degrees at 6 knots
PDX. 190 degrees at 11 knots
Troutdale. 220 degrees at 1 knot
The outlier of course is PDX at 8pm. According to the data supplied by the US Weather Bureau, the wind shits from out of the SOUTHEAST at 130 degrees to out of the WEST at 270 degrees in one hour and then shifts again from out of the WEST at 270 degrees to out of the SOUTH-SOUTHWEST an hour after that.
Now, that is certainly possible for a dramatic shift in wind over an hour period, but it is unusual. Could it be that the 270 is actually a typographical error and the wind was blowing out of the SOUTH-SOUTHEAST at 170 degrees?
Either way, it would appear that the wind direction was shifting throughout the night, and that any wind speed or direction at the DZ - say between Ariel and the Columbia is merely an estimate based on weather reports from stations miles away.
Even the historical data from Weather Underground states that the wind from from the SE at 8pm at PDX.
I have more information obviously, but I want to make sure I have facts before I make any claims.
Chaucer, the wind information you list is for the ground winds. The airliner was at 10,000 feet above sea level. The winds aloft information that Tom Kaye has uncovered is for the winds at altitudes that are completely out of the atmospheric ground effect.
Chaucer, go to FAA.gov and download the free FAA publication "Aviation Weather". Then give it a thorough study. The weather information you have listed above is simply not a factor in the hijacking.