Cyclone Maila and soon-to-be Typhoon Sinlaku, a pair of twin tropical cyclones in the Pacific, could thrust forward the formation of an El Niño while bringing impacts to Oceania and Guam.

What To Know About These Systems:

- They're located north to northeast of Australia and east of the Philippines.

- Tropical Cyclone Maila formed at the beginning of the month in a tantrum of stubbornness in the Solomon Sea. The cyclone never really moved over much its lifespan, but did become a rare Category 4 storm for the Solomon Sea. For several days, the storm’s forecast cone of uncertainty was more like a giant circle since the storm only moved tens of miles.

- Maila has since waned in intensity and has finally drifted westward.

- Sinlaku is expected to move more quickly away from the equator and could threaten Guam early next week as a Category 3 or 4 typhoon. That could bring more than a foot of rain and tropical storm to typhoon force winds.

Weather explained: The term tropical cyclone is used in many of our stories as a generic, all-encompassing term for tropical depressions, tropical storms and hurricanes. But in some parts of the world, the term is used in place of hurricane or typhoon.

Here are a few stories we’re monitoring with these systems:

Twin Cyclones

The two systems, Maila and Sinlaku, make up a pair of tropical cyclones that formed on opposite sides of the equator, known as twin cyclones.

This phenomenon is unheard of in the Atlantic, but is much more common in the western Pacific and Indian Oceans, which host favorable conditions for tropical systems both north and south of the equator. In the south Atlantic, tropical systems don’t form close to the equator and form rarely at all in that basin. In the Pacific, twins can form as often as 2-3 times a year.

They form when a burst of wind and moisture moving eastward at low latitudes is split in half by the equator. The resulting storms will be mirror images of each other and will spin in opposite directions.

The Coriolis effect is the main reason that the two tropical cyclones will rotate differently. In the northern hemisphere, storms will spin counterclockwise, while they will spin clockwise south of the equator.

(Weather Words: The Coriolis Effect)

The two systems will generally drift away from the equator during their lifetime, but can remain connected by tendrils of moisture for several days.

El Niño Impacts

Indirectly and with a significant delay, these two cyclones could have impacts around the world by this summer long after they’ve dissipated.

The wind burst that helped them form and the additional eastward flow created by the twins will likely help intensify this year’s expected El Niño.

These strong winds will push warm water located between Hawaii and New Guinea eastward toward South America, helping trigger the formation of El Niño later this year.

Once this process begins, it becomes difficult to stop. When the eastern Pacific is engulfed in warmer water, thunderstorms begin to form, which tends to pull in more wind from Oceania. This spurs more thunderstorm activity and so the loop begins. This is called the Bjerknes feedback loop.

(MORE: What Super El Niño Means For Atlantic Hurricane Season)

Before the 1997-1998 El Niño, typhoons Ivan and Joan in the northern hemisphere and Tropical Cyclone Lusi helped enhance a westerly wind burst, and thus are credited with enhancing the strength of the El Niño that year.

Similarly, in 2015, Cyclone Pam and Tropical Storm Bavi are credited with enhancing the strength of the super El Niño that year.

Jonathan Belles has been a digital meteorologist for weather.com for 9 years. His favorite weather is tropical weather, but also enjoys covering high-impact weather and news stories and winter storms. He's a two-time graduate of Florida State University and a proud graduate of St. Petersburg College.