North American Monsoon

The American monsoon system is a regional expression of a monsoon on the American continents.

In North America, a monsoon phenomenon between the Gulf of Mexico and the southern United States occur. This is, however, like all other regional monsoons, far weaker and hardly affects the ITC. Through a thermal low in the valley of the Colorado River, the Yumatief can penetrate warm moist winds from the Gulf of Mexico deep into the continent here. Also, the Bermuda high and a weak high above the quadrangle of the states of Utah, Colorado, New Mexico and Arizona affect the monsoon. This also has an effect on the states of Nevada and California. The summer monsoon is responsible for about 70 % of the annual rainfall, normally provides mid-July, holds up in September and will blow from the south. In contrast, dominates at a winter monsoon a western wind direction, which results from the interaction of different pressure areas.

Starting point for the monsoon phenomenon in South America is heating up on the Altiplano plateau during the austral summer

• Monsoon
• Weather and Climate of North America