Northeasterly winds formed by western inland Great Basin high pressure
Turning clockwise, heading towards the Pacific Ocean, getting faster as it crosses the mountain range.
Accompanied by high temperature and dry gusts… 10 to 25 cases per year, sometimes exceeding 64 km/h
The strong monsoon winds blowing from the northeast are one of the main factors contributing to the rapid spread and difficulty in extinguishing simultaneous large-scale forest fires that occurred in Los Angeles (LA), southern California, USA.
Nicknamed the ‘Devil’s Wind,’ ‘Santa Ana’ blows from inland toward the southern California coast and the Pacific coast, bringing dry, warm, gusty winds.
It moves in the opposite direction of the current that carries moist air from the Pacific Ocean to the region.
Typically, about 10 to 25 cases occur each year and last for 1 to 7 days, with the average strong wind lasting for 3 days. The longest Santa Ana lasted 14 days in November 1957.
Wind speeds often exceed 64 km/h and dry weather can seriously worsen brush or forest fires in drought conditions.
This wind is generated by high pressure over the Great Basin, a vast desert inland in the western United States.
The dehydrated air blows clockwise toward Southern California, accelerating as it passes through the mountain ranges that separate the desert from the metropolitan areas along the coast.
The British Guardian explained on the 8th, “Just as a slow-flowing river turns into a torrent in a narrow place, the wind passing through the canyon speeds up and becomes drier and warmer as it goes down.”
The name Santa Ana is known to be associated with the Santa Ana Canyon in Orange County, LA.
The places where Santa Ana mainly passes are the Santa Ana Canyon in Orange County, the Santa Clara River basin in Ventura and Los Angeles counties, Newhall Pass, San Fernando Valley, San Bernardino, Fontana, and Cajon Pass near Chino.
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