Monday into Tuesday: Santa Ana Wind Warning Issued


This will be the last update to the Santa Ana Wind Event scheduled to arrive by Monday morning and peak that day, lasting into Tuesday in spots.  Some areas may see winds exceeding 80 mph, maybe even 100 mph at times.  Read more for details.

Well here we are, the first Santa Ana Wind event of the season.  A system diving into Arizona Monday into Tuesday will cause the winds to shift from onshore to offshore, with gusty northeasterly winds developing early (before sunrise) on Monday morning.  Gusts in the main Santa Ana Wind prone zones will be 30-50 mph, however such areas near Moorpark, Fontana near the Mall, and parts of the Santa Clarita Valley may see wind gusts exceed 80 mph.  As an average however the event will harbor 40 mph winds in the prone areas.

The area spots that usually do not get the Santa Ana Winds without upper support.  However.. this event has such upper support and it will bring the winds into the San Gabriel Valley in areas like Sierra Madre, El Monte, Glendora, and Azuza.  These winds near the foothills will exceed 45 mph and wind gusts as much as 30-40 mph in El Monte for this event, mainly Monday.

Gusts are furthermore expected in the nominal Orange County areas.  Really cannot say every single location so if you are a full member, my wind map with cities and an address search is available on the member section – link – Click Here

These winds will be a cooler type wind.  While Arizona is having there shower/thunderstorm activity, the backside of that system causing the Santa Ana Wind pattern will be rather cold.  Temperatures in wind sheltered areas will be in the 40s at night and even 20s up in  Big Bear, making this your first hard freeze of the season.  Upper support is available for wind in the mountains too so wind chill factors will also be colder than the low temps.

Fire danger is low-moderate in the San Bernardino, Riverside, San Diego areas, including Orange County at the moment due to the recent rainfall received in many locations, but single digit humidity levels along with those gusty winds would put this warning included with my Fire Weather Watch.  Areas near the lesser hit rainfall zones of the Santa Clarita Valley, Ventura County, and Kern County Mountains will have the Fire Weather Warning embedded in this for higher risks there.

With this warning is also the fact that Ontario Airport as well as some airports near Burbank may have delays, cancellations, and/or diverts to other airports.  Check with your airline frequently between Monday morning and Tuesday.

Also… with the recent rains we will see trees and power-poles falling.  This is because the soil is soft and the roots of trees are weakened.  Many will fall with this event in the strongest hit areas.

The strongest winds will not arrive in the Riverside/San Diego County Mountain/Foothill zones until later Monday and into Tuesday with the secondary batch of gusts.

This same cutoff low that will impact our wind event will meander for a week or more.  This will make the future forecast tough on where it ends up and who gets the precipitation from it.  Right now the best I can say is the closer you are to the Eastern Deserts the better chances you get for more precipitation in a week time-frame starting this next week.

Most dangerous spot detected:  Chaffey College in Rancho Cucamonga on Monday


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