Why do cities right on the US West Coast like San Francisco have chilly or rainy weather but if you go a little inland it’s hot and desert ?
- skeptikLv 71 month ago
Northern California is cool and rainy because a cold deep ocean current flows north to south very close to the coast. The ocean floor off southern California is much shallower, the the cold water stays offshore (mostly.)
In either case, the region inland still gets a lot of sunshine, so once you get east of the mountains and into their "rain shadow" it is quite arid. The "hot and desert" area starts close to the coast in southern California, but doesn't really begin until after the mountains in northern California.
- JohnLv 41 month ago
The pacific ocean
- Anonymous1 month ago
You said it yourself. They're on the coast.
- martinLv 71 month ago
The coastal climate comes from the Arctic current sweeping down from the coast of Alaska. But inland, the Sun bakes the land, especially when there's no rain many years from April to October.
- How do you think about the answers? You can sign in to vote the answer.
- oldprofLv 71 month ago
The ocean off the west coast of the US is cold, about mid 50s F year around. So when the wind is on-shore it has come across the cold ocean and turned cold from the surface water before it makes landfall. And when it makes landfall it bathes the cities right on the coast with that cold air off the ocean.
But then as that same volume of cold air moves farther inland, it picks up the heat from the ground and from the Sun. So the air, once cold, now heats up. And by the time that air reaches Livermore or Antioch it has warmed up and no longer can cool off those cities. They are hot then.
As to the rain. As air heats up it has the ability to hold more and more moisture. So if it was raining along the coastline while cold, it might very well stop raining as the air warms over inland simply because it can hold that moisture better. On top of the capacity to hold water, it's very possible that the air just dumps all its rain early and by the time it reaches inland it's simply has no more rain to give.Source(s): Took meteorology course as Naval Aviator.
- Anonymous1 month ago
It’s the mountain ranges they have. From the drier inland areas that are deserts the mountains block the cool moist ocean air from making their way in and the valleys essentially fan warm dry air up to the coastline which causes in some cases a very thin stretch to have cool air but if you drive a few miles inland it will turn hot and dry. As you go more upwards into Oregon and Washington the cool moist air extends inland in some cases up to 100 miles but due to the Cascade mountains the same scenario happens where that air ends up blocked and it turns dry hot the more inland you go. Even Washington state has deserts from the mountain ranges.
- KathyLv 71 month ago
Because they are next to an ocean, which gives them that rain. Inward areas do not get all not moisture from the ocean, so it is drier.
- Never againLv 61 month ago
Because they are right next to cold oceans, but the cold air doesn't travel that far. The cold ocean currents come all the way from Alaska.