Menu Close

What type of weather does an El Nino bring to our West Coast?

What type of weather does an El Niño bring to our West Coast?

El Niño can affect our weather significantly. The warmer waters cause the Pacific jet stream to move south of its neutral position. But in the U.S. Gulf Coast and Southeast, these periods are wetter than usual and have increased flooding. El Niño causes the Pacific jet stream to move south and spread further east.

What type of weather does El Niño cause on the western side of South America?

The eastward movement of oceanic and atmospheric heat sources cause unusually severe winter weather at the higher latitudes of North and South America. Regions as far north as the U.S. states of California and Washington may experience longer, colder winters because of El Niño.

What kind of weather does South America experience when El Niño is happening?

During an El Niño event, the surface of the tropical Pacific Ocean gets warmer than usual, particularly at the equator and along the coasts of South and Central America. Warm oceans lead to low pressure systems in the atmosphere above, which in turn leads to a lot of rain for the western coasts of the Americas.

How is the west coast of South America affected by El Niño?

El Nino is the warming of the Pacific Ocean off of the western coast of South America near Ecuador and Peru. The effects of a strong El Nino include a wetter and cooler than normal winter season in the southern United States, though the Pacific Northwest states tend to be warmer.

Does La Niña mean more rain?

While La Niña usually brings above-average precipitation, temperatures can sometimes be too high and hence it may fall as rain rather than snow at high elevations, reducing snow depths.

Is El Niño worse than La Niña?

A La Nina usually means a more active season with more and perhaps stronger storms. An El Nino means fewer, weaker storms. An El Nino means more strong crosswinds that can decapitate storms, but a La Nina means fewer, allowing storms to grow.

What does a strong La Niña mean?

Simply put, when the waters over the Equatorial Pacific are cooler than average by 0.5°C or more, and it looks like that will continue for several seasons, there are strong signals a La Niña is happening or will occur. El Niño, conversely, is when the water temperatures are above average.

Which is expected to happen during La Niña?

La Niña causes water in the eastern Pacific to be colder than usual. In the same region, El Niño can cause the water to be warmer than usual. Areas that are hit with drought during La Niña years are pummeled with rain in El Niño years. A La Niña year usually happens a year or two after an El Niño year.

Does La Niña bring rain?

A typical La Niña winter in the U.S. brings cold and snow to the Northwest and unusually dry conditions to most of the southern tier of the U.S., according to NOAA’s Climate Prediction Center. Globally, La Niña often brings heavy rainfall to Indonesia, the Philippines, northern Australia and southern Africa.

How does El Nino affect the weather in North America?

USGS Science for an El Niño Winter. El Niño is a phenomenon that occurs when unusually warm ocean water piles up along the equatorial west coast of South America. When this phenomenon develops, it affects weather patterns around the globe, including the winter weather along the west coast of North America.

Where does warm surface water move during El Nino?

These changes in air pressure and wind speed cause warm surface water to move eastward along the Equator, from the western Pacific to the coast of northern South America. These warm surface waters deepen the thermocline, the level of ocean depth that separates warm surface water from the colder water below.

Where does El Nino Southern Oscillation La Nina occur?

El Niño-Southern Oscillation (ENSO) La Niña is a climate pattern that describes the cooling of surface ocean waters along the tropical west coast of South America.

What’s the difference between El Nino and La Nina?

Downpour. La Nina is considered to be the counterpart to El Nino, which is characterize d by unusually warm ocean temperatures in the equatorial region of the Pacific Ocean. Together, La Niña and El Niño are the “cold” (La Niña) and “warm” (El Niño) phases of the El Nino-Southern Oscillation (ENSO).