Pacific Storm Gavin has officially been named here at Southern California Weather Force and will impact the region starting Wednesday morning as a category three system in the first system in the Martin Storm Pattern for March 2021 so read on for details in your area …
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Moving right along first will be overnight tonight into Monday morning. Cloudy conditions and onshore flow will work with low-level convergence to bring light showers to the Los Angeles, Orange, San Diego, and some Inland Empire areas. It won’t be much, but don’t be surprised if the early morning commute is a bit slick.
Pacific Storm Gavin (Click here for the SCWF Storm Name List) will start to affect the region on Tuesday, mainly San Luis Obispo County. We could even see the first thunderstorms develop in that county a full day before the main metros of Los Angeles get affected by it. As Pacific Storm Gavin slides down into the region, the main areas will be impacted on Wednesday, starting in the morning. The system is a wide and cold system, thus it looks like the commute will be affected on the main vein mountain passes out of the area, that of Gorman and Cajon Pass. No doubt I’ll need some sort of winter weather advisory with this system. The snow levels will be around or below 4,000 FT with it.
Precipitation totals will not be overly high with this for a major flood concern other than some urban street flooding in the stronger cells, however, Gavin does have the dynamics to produce thunderstorms with it in the ‘most and medium’ risk shaded zones on the map on your Wednesday. The wind gusts will come out of the west a day before it hits. Wind gusts are expected to be the strongest in the area on Tuesday. Advisories will go out if needed for certain zones on Monday for Tuesday. The main front does not have strong wind gust potential with it. Gavin will mostly revolve around being a thunderstorm-producing system along with mountain pass snowfall at times.
Depending on if the system cuts off, it can last into Thursday as well. More information will be written as numbers are crunched… but for now, this far out is the best I can provide for most impact zones.
A couple more systems will impact between March 15th and the 23rd. None seems to be a major flood issue in the burn areas. Although we do need the rain, you are escaping the flood risk danger thus far this season.
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