
1) Air current 2) Current of air 3) Wind
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https://www.crosswordclues.com/clue/harmattan

1) Wind
Found on
https://www.crosswordclues.com/clue/harmattan

The Harmattan is a hot, dry and dusty wind (continental trade wind) blowing over West Africa. This northeasterly wind blows from the Sahara Desert into the Gulf of Guinea between the end of November and the middle of March (winter). The name comes from or is related to an Akan cognate. On its passage over the desert, it picks up fine dust and sand...
Found on
http://en.wikipedia.org/wiki/Harmattan

• (n.) A dry, hot wind, prevailing on the Atlantic coast of Africa, in December, January, and February, blowing from the interior or Sahara. It is usually accompanied by a haze which obscures the sun.
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http://thinkexist.com/dictionary/meaning/harmattan/

hot, dry wind that blows from the northeast or east in the western Sahara and is strongest in late fall and winter (late November to mid-March). It ... [14 related articles]
Found on
http://www.britannica.com/eb/a-z/h/17

a hot, dry, and dusty northeasterly or easterly wind that occurs in West Africa north of the equator and is caused by the outflow of air from subtropical high pressure areas.
Found on
http://www.encyclo.co.uk/local/22268
Har·mat'tan (här*măt't
a n)
noun [ French
harmattan , probably of Arabic origin.] A dry, hot wind, prevailing on the Atlantic coast of Africa, in December, January, and February, blowing from the interior or Sahara. It is usually accompanied by a haze which obscures the sun.
Found on
http://www.encyclo.co.uk/webster/H/15

The dry, dusty trade wind blowing off the Sahara Desert across the Gulf of Guinea and the Cape Verde Islands. Sometimes called the DOCTOR, because of its supposed healthful properties.
Found on
http://www.ggweather.com/winds.html

[
n] - a dusty wind from the Sahara that blows toward the W coast of Africa during the winter
Found on
http://www.webdictionary.co.uk/definition.php?query=harmattan

A very dry North-East wind prevalent in West Africa during the dry season (November to March) carrying with it great quantities of dust from the Sahara.
Found on
https://www.encyclo.co.uk/local/20784
No exact match found.