Issued Zones: Los Angeles, Riverside, San Diego Mountains …
Site: Southern California Weather Force has issued a High Wind Warning for Mountain Wave Activity Thursday into Friday …
Date: 1/14/20 at 12:40pm PT
Forecast: A strong mid/upper level jet stream will move through on Thursday giving some snow to the region and strong winds. The snow isn’t going to be the issue here, the winds will be.
The mid-level jet is very strong, probably the strongest in a couple years and what this will do is with the drying behind and along the front, cold air surging downward will bring gusts over the 50-70 mph mark.
Be advised to prepare for this wind storm starting Thursday afternoon and going through Friday morning … Use the model below to see where on the mountain you are to the intensity scale.
Martin Wind Gust Intensity Scale –
8. Extensive widespread damage.
7. Trees are broken or uprooted, building damage is considerable. – High Profile Vehicle Roll-Over CERTAIN.
6. SOME Trees are broken or uprooted, building damage is possible. – High Profile Vehicle Roll-Over Likely, Do NOT recommend Traveling in this zone
5. Slight damage occurs to buildings, shingles are blown off of roofs. HIGH WIND WARNING CRITERIA – High Profile Vehicle Roll-Over Possible if weight is not corrected.
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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Forecaster: KM