http://abc7.com/weather/doppler/interactive/
http://www.wunderground.com/wundermap/

I also check local weather simply on Google, and http://www.wrh.noaa.gov/mesowest/getobext.php?wfo=lox&sid=KLAX&num=168&raw=0&dbn=m for wind direction or other data, but mostly I just look at the sky to see which way the wind is blowing: this tells us what to expect.