The Harmattan is a trade wind, so in theory it is always there in some form as a result of lower pressure near the equator and high pressure just north of there. However, in the summer it is undercut by the cooler winds of the monsoon and forced to rise to higher altitudes where the effects are not felt.
The harmattan is a dry and dusty season that occurs over the West African nations. It is characterized by intense dryness, very little humidity, dust, and sand particles in the air and vastly fluctuating ambient temperatures all over the place.
It is called a "simoom". (Alternate spellings are samiel, sameyel, samoon, samun, simoun, and simoon.)
Special winds are winds that are local to one country or region. Santa Anas are an example of special winds, as are bayamos, chinooks, the Harmattan, and the Mistral.
Energy from the Sun causes wind.
Wind
The Harmattan is a hot, dry and dusty wind (continental trade wind) blowing over West Africa. I know not why it might be delayed.
The harmattan is a dry Saharan wind from the direction of the Sahara desert.
Harmattan is the correct spelling for the dry and dusty seasonal trade wind in Western Africa.See the related link below.
harmattan
The Harmattan is a cold-dry and dusty trade wind, blowing over the West African subregion of the Sahara Desert.
Harmattan
Harmattan
Harmattan
The Harmattan is a strong wind that blows over the Sahara desert. It brings clouds of sand and dust that can hang in the air for days, forcing aircraft changes and causing health problems. The Harmattan can interact with monsoon winds causing tornadoes. From December to March this wind blows from the north-east of Ghana, lowering the humidity and giving hot days and cool nights, especially in the north.
The Harmattan is a strong wind that blows over the Sahara desert. It brings clouds of sand and dust that can hang in the air for days, forcing aircraft changes and causing health problems. The Harmattan can interact with monsoon winds causing tornadoes. From December to March this wind blows from the north-east of Ghana, lowering the humidity and giving hot days and cool nights, especially in the north.
The harmattan is a dry and dusty season that occurs over the West African nations. It is characterized by intense dryness, very little humidity, dust, and sand particles in the air and vastly fluctuating ambient temperatures all over the place.
It's a hot dry north wind which blows out of the Sahara desert towards countries on the Guinea coast.