Widespread mid to high level clouds and periods of light to locally moderate precipitation will taper off this evening. Warming high and low temperatures through the middle of next week. Slight chance of mountain showers and thunderstorms each afternoon through the middle of the week. Gradual cooling into next weekend.
For extreme southwestern California including Orange, San Diego, western Riverside and southwestern San Bernardino counties,
, UPDATED AVIATION DISCUSSION,
Widespread cloud coverage is being observed associated with moisture from Tropical Cyclone Marie with showers expected to stop early this evening. Lingering moisture tomorrow and Tuesday will continue chances of precipitation, mainly over the mountains. Afternoon shower and potentially thunderstorm chances will continue into Thursday. A ridge of high pressure will build from the south for the middle of the week which will turn the upper level flow southeasterly. Currently Wednesday looks like the most likely day for showers and thunderstorms to develop over the mountains in the afternoon. Low confidence in details surrounding rainfall rates at this time. Shower and thunderstorm chances have decreased for Thursday, with the potential for the ridge of high pressure moving right over Southern California, which would result in a very stable air mass aloft.
High temperatures Monday are expected to be 5 to 10 degrees warmer than today, with less cloud coverage expected. High temperatures will continue to increase into Wednesday for areas west of the mountains and Thursday for the deserts. Above average high and low temperatures can be expected for the majority of this week. Widespread minor to moderate HeatRisk is expected for inland areas Tuesday through Thursday.
070030z, Coast/Valleys/Mountains, Mid/high level clouds SCT-OVC AOA 10,000-20,000ft will persist through the TAF period. Ongoing -SHRA north of San Diego County and W/N of the Coachella Valley will begin to taper off after 03Z Monday. SCT-BKN cigs near 5000-8000 ft beginning to clear out as well with high clouds and drier weather into Monday.
Deserts, Mid/high level clouds SCT-OVC AOA 10,000-20,000ft will persist through the TAF period. -SHRA in the High Desert ending near 03Z Monday. Otherwise, VFR with no significant impacts expected.
No hazardous marine conditions are expected through Thursday.
A large south swell from Hurricane Marie is set to peak into Monday before gradually diminishing Tuesday. This will result in elevated to high surf and strong rip and longshore currents at the majority of beaches. Additionally, waves will occasionally run much farther up the beach than expected, especially during increasing and high tides.
For south and southwest-facing beaches, expecting high surf 6-10 feet. This includes Orange County and north San Diego County beaches. For west-facing beaches, expecting elevated surf 4-7 feet. This includes most of southern San Diego County beaches.
High surf combined with high astronomical tides 6.2 to about 6.8 feet will lead to tidal overflow and coastal flooding through Tuesday during evening high tides, especially for south and southwest-facing beaches as well as low-lying areas.
Ca, Coastal Flood Advisory until 11 PM PDT Tuesday for Orange County Coastal Areas-San Diego County Coastal Areas.
High Surf Advisory until 11 PM PDT Tuesday for Orange County Coastal Areas-San Diego County Coastal Areas.
PZ, None.
