This a very interesting graphic from National Weather Service San Diego* about yesterday’s warm temperatures.
nws-san-diego-graphic-warming-air-1-30-17
https://twitter.com/NWSSanDiego

Note that directly over San Diego, the 10 a.m. wind arrows show East/NE flow (land-to-sea).
I’m not sure why the disparity, but here are San Diego’s winds on the ground yesterday, Jan. 30, 2017 (the time of the graphic above). Note how dry it is, and how day winds are classic sea breezes (‘onshore’):

Weather Conditions For:

San Diego, San Diego International-Lindbergh Field, CA. KSAN (NWS/FAA   – SGX)

Elev: 13 ft.; Lat/Lon: 32.73361/-117.18306

http://www.wrh.noaa.gov/mesowest/getobext.php?wfo=sgx&sid=KSAN&num=72&raw=0

Date

(PST)

Temp

(F)

Relative
Humidity
(%)
Wind
Direction
Wind
Speed
(MPH)
30 Jan 11:51 pm 56 47 N CALM
30 Jan 10:51 pm 58 44 N CALM
30 Jan 9:51 pm 59 41 N CALM
30 Jan 8:51 pm 62 39 N CALM
30 Jan 7:51 pm 64 28 N CALM
30 Jan 6:51 pm 66 22 N 3
30 Jan 5:51 pm 69 20 NNW 5
30 Jan 4:51 pm 73 16 NNW 7
30 Jan 3:51 pm 74 15 NW 7
30 Jan 2:51 pm 76 13 WNW 7
30 Jan 1:51 pm 76 12 NW 8
30 Jan 12:51 pm 75 12 NNW 8
30 Jan 11:51 am 74 13 NW 7
30 Jan 10:51 am 71 20 NW 7 
30 Jan 9:51 am 68 28 WNW 7 
30 Jan 8:51 am 63 29 N CALM
30 Jan 7:51 am 56 38 NNW 3
30 Jan 6:51 am 53 38 N CALM
30 Jan 5:51 am 50 50 N CALM
30 Jan 4:51 am 52 43 N CALM
30 Jan 3:51 am 51 47 N CALM
30 Jan 2:51 am 52 43 3
30 Jan 1:51 am 55 38 N CALM
30 Jan 12:51 am 55 38 N 5
29 Jan 11:51 pm 56 44 WNW 3
29 Jan 10:51 pm 57 36 NW 3
29 Jan 9:51 pm 59 36 NE 5
29 Jan 8:51 pm 61 36 N CALM
29 Jan 7:51 pm 62 32 N 6
29 Jan 6:51 pm 66 26 SW 3
29 Jan 5:51 pm 68 21 NNW 3
29 Jan 4:51 pm 70 23 WNW 7
29 Jan 3:51 pm 71 14 WNW 5
29 Jan 2:51 pm 75 12 NW 7
29 Jan 1:51 pm 74 12 WNW 6
29 Jan 12:51 pm 72 17 NNW 9
29 Jan 11:51 am 73 9 WNW 5
29 Jan 10:51 am 71 13 NW 3
29 Jan 9:51 am 65 19 N CALM
29 Jan 8:51 am 57 36 N CALM
29 Jan 7:51 am 49 46 N 5
29 Jan 6:51 am 47 46 NNE 5

*Their office includes nearby Orange County, and our L.A./O.C. metro area is the only one in the USA that is split by 2 out-of-town offices. (I was told by former NWS Director Jack Hayes that the Oxnard location “was a union thing.” I’d suggested they move NWSLA to LAX so they could see our winds in the sky; but I think some employees live in Santa Barbara and Ventura, so commute the other way.)
NWS_Weather_Forecast_Offices.svg
National Weather Service Forecast Offices
.

Where people live:
california_population_map-wikimedia
southern-california-population-density-map
.