Monsoonal moisture in east to southeast flow aloft will bring scattered showers and thunderstorms to the mountains, deserts, and inland valleys through Tuesday, mainly during the afternoon. Monsoonal moisture will then decrease through next weekend. High temperatures will gradually cool into the middle of this week with high temperatures for the mountains and valleys as much as 5 to 10 degrees below average for Wednesday through Saturday.
For extreme southwestern California including Orange, San Diego, western Riverside and southwestern San Bernardino counties,
(today through Wednesday), High pressure aloft will slowly weaken through midweek. Monsoonal moisture in east to southeast flow aloft will bring scattered showers and thunderstorms to the mountains, deserts, and inland valleys through Tuesday, mainly during the afternoon. Monsoonal moisture will then decrease through next weekend with only a slight chance of showers and thunderstorms for Wednesday afternoon.
There will be a cooling trend into the middle of the week with high temperatures for the mountains and inland valleys falling to as much as 5 to 10 degrees below average for Wednesday through Saturday. The HeatRisk will decrease each day through the middle of the week. There will widespread moderate HeatRisk for the deserts today with areas of moderate HeatRisk for the inland valleys and lower elevations of the mountains with any remaining moderate HeatRisk by Wednesday only for portions of the lower deserts.
(Thursday through Sunday), Drier inland and not as hot through next weekend. High temperatures will cool a few degrees on Thursday, then slowly warm through next weekend. High temperatures on Thursday will be as much as 5 to 10 degrees below average for the mountains and inland valleys, then around 5 degrees below average for those areas for next Sunday.
High temperatures on Thursday will range from the 70s near the coast to the mid 80s to around 90 for the Inland Empire with 100 to 104 for the lower deserts. For Sunday, high temperatures will range from the 70s near the coast to the upper 80s to mid 90s for the Inland Empire with 104 to 108 for the lower deserts.
100600z. Coast, Patchy low clouds to gradually develop overnight, slowly increasing in coverage, with best chances of cigs at coastal TAF sites between 11-15Z Tuesday. Bases around 700-1100 feet MSL. Scatter out of any cigs Tuesday by 16Z. VFR conditions expected Monday afternoon and evening.
Valleys/Mountains/Deserts, SCT-BKN clouds mostly above 15000 feet through 18Z Monday. Scattered TSRA over mtns with an isold TSRA or two in the High Desert 19Z Monday to 02z Tuesday with bases around 9000 feet MSL with tops to 50000 feet. Any TSRA could produce lightning, strong up/downdrafts and associated vis reductions.
No hazardous marine conditions are expected through Friday.
High tides will exceed 7 feet during evenings Monday through Wednesday between 800-930 PM, resulting in minor tidal overflow of low-lying areas along the beach. Surf will be low and is not expected to add much to the flooding potential. Check the Coastal Flood Advisory for details.
Ca, Coastal Flood Advisory from 6 PM Monday to 11 PM PDT Wednesday for Orange County Coastal Areas-San Diego County Coastal Areas.
PZ, None.
