U.S. CitiesCity-Data Forum Index
Go Back   City-Data Forum > U.S. Forums > General U.S.
Please register to participate in our discussions with 2 million other members - it's free and quick! Some forums can only be seen by registered members. After you create your account, you'll be able to customize options and access all our 15,000 new posts/day with fewer ads.
View detailed profile (Advanced) or search
site with Google Custom Search

Search Forums  (Advanced)
Reply Start New Thread
Old 04-29-2015, 09:11 PM
5,835 posts, read 10,784,577 times
Reputation: 4428


Originally Posted by rnc2mbfl View Post
The jet stream moves from west to east and often pulls cold Canadian air down during the Winter. The Pacific Ocean moderates the temps in the NW US because water holds heat more efficiently. As the jet stream moves fronts across land in the Winter, they lose that moderating effect because land doesn't hold heat as efficiently as water and the air rapidly cools. By the time they reach the East Coast, the fronts have been cooled by more than 2 thousand miles of land.
Exactly. The prevailing westerlies and the jet stream essentially brings in "continental weather patterns to the eastern seaboard overriding any moderating effect of the ocean.

On the west coast, the weather is largely directly affected by the ocean because thats where the prevailing westerlies are coming from.
Reply With Quote Quick reply to this message

Old 04-29-2015, 09:56 PM
Location: Westminster/Huntington Beach, CA
1,780 posts, read 1,243,605 times
Reputation: 1196
Originally Posted by Tex?Il? View Post
Not exactly.

A warmer eastern Pacific would lead to MORE precipitation. The whole reason why California gets less rain is partly because of the cold current that originates in Alaska. The air above cold ocean has generally less humidity and is more stable. Its the warm, humid waters off the southeast that contributes to their rainfall.

Of course the high pressure cells and ridges steer storm tracks away, but this is not new. Also high pressure should be pushed further north of the Atlantic to, if one could solely explain by climate change.
I think he may be referring to the warm mass in the northeastern Pacific, not equatorial. That's what they call "the Blob", which is being blamed for the consistent shift in the jet stream and persistent blocking ridge. It's basically just steering most storms way up north and over CA.
Reply With Quote Quick reply to this message
Old 04-30-2015, 12:29 AM
Location: A subtropical paradise
2,069 posts, read 2,199,033 times
Reputation: 1329
This dichotomy is all due to a phenomenon due to the Cold Epoch.

The abnormal weather pattern perturbs the jet stream in a way that causes a prevailing tendency towards dipping in the East, and rising in the West, causing cold, and warmth, respectively. Such weather phenomenons have occurred on other continents and locations in history, such one over Europe in the early modern period, known as the Little Ice Age, when even cities in the Med saw blizzards every year. In the not too distant past, during the time of Spanish Exploration of the Americas, the Western US was noted to get very cold; it was to the point that the Salinas River in CA froze over, the state had regular snowfall, and hanging icicles as far South along the coast as even Big Sur, and Monterrey, CA had a climate like present day Reno:
About California's Climate and Such
Drought Tolerant Plants for California Bay area garden.

In a natural climactic state, the East US would be very, very warm; such a time occurred during the era of the Mound Building Native Americans, when even places as far inland and north as Cairo, IL had nigh 365 day growing seasons.Elements of this can be seen during winter, where coastal South cities end up having nights where low temps are 60F and above, practically tropical levels, even in the middle of January. Such warm, muggy conditions happen due to warm Gulf influence, and it would prevail if not for interruption by cold fronts. Furthermore, check out how easily organisms from the tropics are able to live in the East US; the fire ant, for instance, native to the tropical rainforests of South America, where freezing temps are unknown, is, yet, able to become an invasive species in the South, indicative of just how warm the climate is. Coral reefs off the South's waters constitute the third largest coral system in the world. Flamingoes, ocelots, jaguars, parrots and parakeets, manatees, anhingas, anolis lizards, and coatis all range into the South, all tropical species able to survive in the region, indicative of the true warmth. In addition, tropical plants like Bromeliads(such as Spanish moss), mangroves, water hyacinth, mahogany trees, and resurrection ferns all can be found ranging into the South, in the Eastern US. With South Florida, the East US has a TROPICAL climate OUTSIDE of the tropics. Not only is that a rarity on Earth, it is also quite far from the latitude in comparison to most other continents.
Reply With Quote Quick reply to this message
Old 04-30-2015, 01:03 AM
Location: Seattle
6,954 posts, read 9,049,221 times
Reputation: 3788
the west is also generally drier than the east coast. The rainiest cities in the US are located in the southeast. Also, the west coast has many micro climates within short distance while one east coast city will have 99% the same weather regardless of neighborhood.
Reply With Quote Quick reply to this message
Old 05-01-2015, 12:53 PM
Location: Trieste
916 posts, read 820,915 times
Reputation: 696
it's all due to Coriolis force that drive out the air from the high pressure areas clockwise while it fills low pressure areas anti-clockwise

in the winter USA is mostly covered by a high pressure area while in the oceans low pressures prevails
so, as you can see in the picture on the left the air tend to pour clockwise on the Eastern USA thereby drawing cold air from Quebec and Greenland
the opposite happens on the West

in the summer the situation is like portraied on the right of the image, mainland USA is mostly hot and low pressured while the oceans high pressured
in the West the air is filled anti-clockwise thereby drawing in fresh air from Alaska while in the Eastern USA the opposite happens

Reply With Quote Quick reply to this message
Old 05-01-2015, 10:57 PM
Location: 130 Miles E of Sacramento
5,464 posts, read 3,297,445 times
Reputation: 3637
Right now, there is a large blob of warm air pressure in the north pacific ocean. It pushes all the cold air up to Alaska and brings it back down through parts of Canada, the midwest and the east coast. This is why the eastern U.S. has been getting some freak blizzards in the past few years and California has been getting warmer.
Reply With Quote Quick reply to this message
Please register to post and access all features of our very popular forum. It is free and quick. Over $68,000 in prizes has already been given out to active posters on our forum. Additional giveaways are planned.

Detailed information about all U.S. cities, counties, and zip codes on our site: City-data.com.

Please update this thread with any new information or opinions. This open thread is still read by thousands of people, so we encourage all additional points of view.

Quick Reply

Over $104,000 in prizes was already given out to active posters on our forum and additional giveaways are planned!

Go Back   City-Data Forum > U.S. Forums > General U.S.
Follow City-Data.com founder on our Forum or

All times are GMT -6.

2005-2019, Advameg, Inc. · Please obey Forum Rules · Terms of Use and Privacy Policy · Bug Bounty

City-Data.com - Archive 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35 - Top