Hurricane Hilary is forecast to become a major hurricane over the next few days as it rides up the Baja Mexico coast and even though it should weaken substantially as it moves north, it could become one of a handful of rare tropical storms that makes landfall in the SD/LA region on Monday.
Impacts for the Mexican coast could be substantial to catastrophic (especially Cat 3/4 high winds and mountain rains/flooding/mudslides), while impacts to SoCal and the desert SW could be moderate to substantial, especially with regard to flooding rains, but that depends on how much land interaction the storm has before reaching the US. There is high uncertainty on that, but the current NWS forecasts for rainfall in SoCal/SW-US from Hilary are substantial and would likely lead to at least some flooding (graphic below).
https://www.accuweather.com/en/hurr...rain-in-california-nevada-and-arizona/1570250
https://www.nhc.noaa.gov/refresh/graphics_ep4+shtml/150247.shtml?cone#contents
Impacts for the Mexican coast could be substantial to catastrophic (especially Cat 3/4 high winds and mountain rains/flooding/mudslides), while impacts to SoCal and the desert SW could be moderate to substantial, especially with regard to flooding rains, but that depends on how much land interaction the storm has before reaching the US. There is high uncertainty on that, but the current NWS forecasts for rainfall in SoCal/SW-US from Hilary are substantial and would likely lead to at least some flooding (graphic below).
https://www.accuweather.com/en/hurr...rain-in-california-nevada-and-arizona/1570250
https://www.nhc.noaa.gov/refresh/graphics_ep4+shtml/150247.shtml?cone#contents
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