If there was no mountains in Southern California. (climate, temperatures, precipitation)

[Thunder98]

What would the Climate be like if there were no mountains in Southern California, would it be wetter across the desert SouthWest or no difference at all?

[nei]

wetter yes. But southern California on the Pacific side isn't very wet to begin with. There'd still be desert but less of it and more semi-arid land.

[P London]

Could moisture from the gulf of Mexico effect summer precipitation that far west?

[nei]

Originally Posted by P London

Could moisture from the gulf of Mexico effect summer precipitation that far west?

no. It mostly peters out far to the east.

http://www.wrcc.dri.edu/pcpn/us_precip.gif

West coast becomes much more arid south of 38°N or so

http://www.crwr.utexas.edu/gis/gishy..._pa_letter.jpg

[theunbrainwashed]

The cooler temperatures would extend probably a few dozen miles inland more, and it would be more like Namibia, except the interior would be a bit wetter, but still semi-arid I believe, or barely semi-arid

[ABrandNewWorld]

I think the Southwest monsoon would make it to the coast more often giving us more summer showers!