A weak front will impact areas west of Los Angeles on Tuesday, with lighter activity elsewhere south and east of there, followed by a slug of tropical moisture on Wednesday in a small spot of the forecast area surrounding Los Angeles County so read on for the details to see where your area stands.
Latest visible satellite images do show cloud tops extending upwards just to the southwest of Vandenberg Air Force Base. This is telling me that instability is strong enough for the risk of thunder through there and along the SLO/SBA/VT County coast west of Los Angeles County on Tuesday morning. This will be a quick hitting front and diffuse into much lighter precipitation as it goes south and east of Los Angeles … so expect Tuesday in the IE/OC/SD areas to have widely scattered light showers at times … but nothing heavy.
Now … a giant slug of tropical moisture is aiming parts of the forecast area for Wednesday. This type of moisture plume hit San Diego the last time … but this time it is aiming for the heart of metro Los Angeles. Given this, it may be wise to enter in a Flood Watch for the Los Angeles areas on Wednesday, including the Antelope Valley and some of the inner High Desert areas surrounding Edwards Air Force Base and Barstow. Would be a rarity that such a plume makes it into the High Desert while missing Santa Barbara.
So as I stated, keep tuned into the forecast for updates to the Wednesday plume. The exact track is still being monitored, but I have the general idea.
We are looking at an early morning Thursday start for gusty winds in all desert areas behind the system …
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