The Weathermen's Brains, Dr. M P Renfrew's cartoonDominant day West winds are why it’s directionally dyslexic to call High pressure in L.A., ‘offshore flow.’

It’s ‘adiabatic heating,’ the sinking and compression of air, that ‘cooks’ it, the intensification of air molecules with higher density.

https://www.wunderground.com/wundermap/: thanks to Weather Underground for these maps; and thanks to the National Weather Service for posting real wind records.
l-a-wundermap-100s-west-winds-9-26-16
100-degree-west-winds-l-a-9-26-16

Weather Conditions for:
Torrance, Zamperini Field Airport, CA.  KTOA  (NWS/FAA)
Elev: 102 ft; Latitude: 33.80; Longitude: -118.33333

Time Temp. Dew Relative Wind Wind
    Point Humidity Direction Speed
(PDT) (f) (f) (%)   (mph)
26 Sep 3:47 pm 99 38 12 W 8
26 Sep 2:47 pm 100 36 11 W 8
26 Sep 1:47 pm 100 36 11 W 12
26 Sep 12:47 pm 100 39 12 WNW 12
26 Sep 11:47 am 104 38 10 CALM  
26 Sep 10:49 am 99 43 15 CALM  
26 Sep 9:47 am       CALM  
26 Sep 8:47 am 90 37 16 NW 6
26 Sep 7:47 am 79 43 28 CALM  
26 Sep 6:47 am 73 39 29 CALM  

http://www.wrh.noaa.gov/mesowest/getobext.php?wfo=lox&sid=KTOA&num=168&raw=0&dbn=m

Weather Conditions for:
Hawthorne, Hawthorne Municipal Airport, CA.  KHHR  (NWS/FAA)
Elev: 62 ft; Latitude: 33.92361; Longitude: -118.33194

Time Temp. Dew Relative Wind Wind
    Point Humidity Direction Speed
(PDT) (f) (f) (%)   (mph)
26 Sep 4:25 pm 99 38 12 W 13
26 Sep 4:20 pm 99 36 11 W 10
26 Sep 4:15 pm 99 36 11 W 13
26 Sep 4:10 pm 100 36 11 W 12
26 Sep 4:05 pm 100 38 11 W 10G16
26 Sep 4:00 pm 99 38 12 W 12
26 Sep 3:55 pm 99 38 12 W 8
26 Sep 3:53 pm 99 38 12 W 9
26 Sep 3:50 pm 99 39 13 W 12
26 Sep 3:45 pm 99 39 13 W 13
26 Sep 3:40 pm 99 39 13 WSW 12
26 Sep 3:35 pm 99 39 13 WSW 13
26 Sep 3:30 pm 99 41 14 WSW 14
26 Sep 3:25 pm 99 41 14 WSW 12
26 Sep 3:20 pm 99 38 12 W 13
26 Sep 3:15 pm 99 34 11 W 10
26 Sep 3:10 pm 100 34 10 W 14
26 Sep 3:05 pm 100 34 10 W 14
26 Sep 3:00 pm 100 34 10 W 12G17
26 Sep 2:55 pm 100 34 10 W 10
26 Sep 2:53 pm 101 34 10 WNW 9G17
26 Sep 2:50 pm 100 34 10 W 15
26 Sep 2:45 pm 100 32 9 W 12
26 Sep 2:40 pm 102 32 9 W 12
26 Sep 2:35 pm 100 32 9 W 8
26 Sep 2:30 pm 100 30 9 W 12
26 Sep 2:25 pm 100 30 9 W 12
26 Sep 2:20 pm 100 30 9 W 8
26 Sep 2:15 pm 100 30 9 W 12
26 Sep 2:10 pm 100 30 9 WNW 10
26 Sep 2:05 pm 102 30 8 W 9
26 Sep 2:00 pm 100 30 9 W 9
26 Sep 1:55 pm 100 30 9 W 10
26 Sep 1:53 pm 102 30 8 W 12
26 Sep 1:50 pm 102 30 8 W 15
26 Sep 1:45 pm 102 30 8 W 12
26 Sep 1:40 pm 102 30 8 W 12
26 Sep 1:35 pm 102 30 8 WNW 9
26 Sep 1:30 pm 102 30 8 WNW 9
26 Sep 1:25 pm 100 30 9 W 12
26 Sep 1:20 pm 102 32 9 W 12
26 Sep 1:15 pm 102 32 9 W 10
26 Sep 1:10 pm 102 32 9 WNW 9
26 Sep 1:05 pm 102 32 9 W 9
26 Sep 1:00 pm 102 32 9 WSW 8
26 Sep 12:55 pm 102 30 8 W 7
26 Sep 12:53 pm 104 31 8 VRBL 3
26 Sep 12:50 pm 102 30 8 CALM  
26 Sep 12:45 pm 100 30 9 CALM  
26 Sep 12:40 pm 100 30 9 CALM  
26 Sep 12:35 pm 102 30 8 CALM  
26 Sep 12:30 pm 100 32 9 CALM  
26 Sep 12:25 pm 100 30 9 CALM  
26 Sep 12:20 pm 102 32 9 NNE 3
26 Sep 12:15 pm 100 32 9 CALM  
26 Sep 12:10 pm 100 32 9 ENE 3
26 Sep 12:05 pm 100 32 9 E 3
26 Sep 12:00 pm 100 32 9 CALM  
26 Sep 11:55 am 100 32 9 N 3
26 Sep 11:53 am 100 32 9 VRBL 3
26 Sep 11:50 am 100 32 9 NW 3
26 Sep 11:45 am 99 32 10 SW 3
26 Sep 11:40 am 99 32 10 SW 5
26 Sep 11:35 am 99 34 11 W 3
26 Sep 11:30 am 99 34 11 CALM  
26 Sep 11:25 am 97 32 10 CALM  
26 Sep 11:20 am 97 32 10 WSW 5
26 Sep 11:15 am 97 32 10 NW 5
26 Sep 11:10 am 99 34 11 CALM  
26 Sep 11:05 am 99 34 11 CALM  
26 Sep 11:00 am 99 34 11 CALM  
26 Sep 10:55 am 99 32 10 N 3
26 Sep 10:53 am 97 32 10 CALM  
26 Sep 10:50 am 97 34 11 NE 5
26 Sep 10:45 am 97 34 11 CALM  
26 Sep 10:40 am 97 34 11 ENE 3
26 Sep 10:35 am 97 34 11 N 3
26 Sep 10:30 am 95 34 12 CALM  
26 Sep 10:25 am 95 34 12 NNW 3
26 Sep 10:20 am 95 34 12 CALM  
26 Sep 10:15 am 95 34 12 NNE 3
26 Sep 10:10 am 93 36 13 NE 3
26 Sep 10:05 am 93 34 12 NE 3
26 Sep 10:00 am 91 34 13 CALM  
26 Sep 9:55 am 91 34 13 N 3
26 Sep 9:53 am 92 34 13 CALM  
26 Sep 9:50 am 91 34 13 NNE 3
26 Sep 9:45 am 91 34 13 N 3
26 Sep 9:40 am 91 34 13 NNE 5
26 Sep 9:35 am 91 34 13 N 3
26 Sep 9:30 am 90 34 14 CALM  
26 Sep 9:25 am 90 34 14 CALM  
26 Sep 9:20 am 90 34 14 N 3
26 Sep 9:15 am 88 36 16 CALM  
26 Sep 9:10 am 88 36 16 CALM  
26 Sep 9:05 am 86 34 16 CALM  
26 Sep 9:00 am 84 34 16 CALM  
26 Sep 8:55 am 84 34 16 CALM  
26 Sep 8:53 am 84 35 17 CALM  
26 Sep 8:50 am 84 36 18 CALM  
26 Sep 8:45 am 84 36 18 CALM  
26 Sep 8:40 am 82 36 19 CALM  
26 Sep 8:35 am 82 34 17 CALM  
26 Sep 8:30 am 82 36 19 CALM  
26 Sep 8:25 am 82 34 17 CALM  
26 Sep 8:20 am 81 36 20 N 3
26 Sep 8:15 am 81 36 20 CALM  
26 Sep 8:10 am 81 36 20 CALM  
26 Sep 8:05 am 79 36 21 CALM  
26 Sep 8:00 am 79 36 21 CALM  
26 Sep 7:55 am 79 36 21 CALM  
26 Sep 7:53 am 77 35 22 CALM  
26 Sep 7:50 am 77 36 22 CALM  
26 Sep 7:45 am 77 36 22 CALM  
26 Sep 7:40 am 77 36 22 CALM  
26 Sep 7:35 am 77 36 22 CALM  
26 Sep 7:30 am 75 34 22 CALM  
26 Sep 7:25 am 75 34 22 CALM  
26 Sep 7:20 am 75 34 22 CALM  
26 Sep 7:15 am 75 34 22 CALM  
26 Sep 7:10 am 75 34 22 CALM  
26 Sep 7:05 am 75 34 22 NNW 3
26 Sep 7:00 am 73 36 25 CALM  
26 Sep 6:55 am 73 36 25 CALM  
26 Sep 6:53 am 74 36 25 CALM  
26 Sep 6:50 am 73 36 25 CALM  
26 Sep 6:45 am 73 36 25 CALM  
26 Sep 6:40 am 73 36 25 CALM  
26 Sep 6:35 am 73 36 25 CALM  
26 Sep 6:30 am 73 36 25 CALM  
26 Sep 6:25 am 73 36 25 CALM  
26 Sep 6:20 am 73 36 25 NNW 3
26 Sep 6:15 am 73 36 25 CALM  
26 Sep 6:10 am 73 36 25 NNW 3
26 Sep 6:05 am 73 36 25 N 3
26 Sep 6:00 am 73 37 27 CALM  

http://www.wrh.noaa.gov/mesowest/getobext.php?wfo=lox&sid=KHHR&num=168&raw=0&

Dr. Melanie Patton Renfrew, Santa Monica Bay, Nov. 2012Excerpt from “WHAT IT TOOK TO CONVINCE NBC THE WINDS ARE COMING FROM THE WEST”