VERY DETAILED MODELS: Arctic Air Mass To Blast Region With Damaging Category Six Santa Ana Wind Event; Freeze Watches Issued For Desert Metros, and SLO/Kern Valleys to the Eastern Inland Empire


An arctic air mass settling into the Western United States will bring cold temperatures in wind sheltered areas along with strong Santa Ana Winds Tuesday evening through Thursday at 9pm with Santa Clarita at Category 6 for Santa Ana Winds, which are DAMAGING, with the cold lasting through till Friday morning.  Read on for details and remember all images in the article are clickable as Southern California Weather Force is the only place that has a Santa Ana Wind Forecast Intensity Model and it can vary even 10 miles away from a point.

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Last night wasn’t what you would call cold in the High Desert Metro areas.  Freeze Watches are now officially in effect here at Southern California Weather Force for the entire High Desert areas, minus the Colorado River Valley.  The freeze watch alert (Click here to read), reads;An arctic air mass is set to hit the Western United States over the Rocky Mountains Tuesday through Friday morning and this will bring an offshore wind pattern into the area.  This cold air advecting in from the Great Basin will bring temperatures in the entire Freeze Warning area to 32 and below.  There is a very good chance a Hard Freeze will set-up for some High Desert areas, but most certainly the High Desert populated metro zones of the Victor Valley and Lancaster.  Please use the SCWF model below to find your area’s concern.  Remember, a Hard Freeze means that you need to take your home/business piping precautions.

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As for the Santa Ana Winds.  I issued a Power Disruption Watch yesterday for the prone areas.  Expect your power to go off if that is NOW the norm for you, sadly.  That is something I cannot control, however I did crack the electric company’s algorithm to produce such an alert and model.  There is a category 6 Santa Ana Wind Event looming for the Santa Clarita and Ventura County Basin/Coast as well as the Fontana areas below the Cajon Pass Tuesday night into Wednesday at 4pm.  The rest of you have high winds in the original prone zones to the Santa Ana Wind Pattern and I have produced the model for it using the Martin Wind Gust Intensity Scale.   A Category 6 Santa Ana Wind Event is damaging as well as a Category 5 value.  If you live in those zones on my model, prepare now.  A category 4-5 is expected in Rosarito, MX as well.  Gusty winds are not expected in Ensenada.  The strongest winds will fade by Wednesday at 4pm, however a light/moderate wind event will remain blowing in the prone zones till Halloween night at 9pm.

Martin Wind Gust Intensity Scale –

8. Extensive widespread damage.
7. Trees are broken or uprooted, building damage is considerable.
6. SOME Trees are broken or uprooted, building damage is possible.
5. Slight damage occurs to buildings, shingles are blown off of roofs. HIGH WIND WARNING CRITERIA
4. Twigs and small branches are broken from trees, walking is difficult.
3. Large trees sway, becoming difficult to walk. POWER SHUTDOWN THRESHOLD WIND ADVISORY CRITERIA
2. Large tree branches move, telephone wires begin to “whistle”, umbrellas are difficult to keep under control.
1. Small trees sway.

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