The heat is expected to peak today with high temperatures 5 to 10 degrees above average. High temperatures will cool a few degrees on Thursday, then cool to around average for Friday into early next week. Drier today, then a slight chance of afternoon showers and thunderstorms will return Thursday, mostly for the mountains, and continue for each afternoon into next week.
For extreme southwestern California including Orange, San Diego, western Riverside and southwestern San Bernardino counties,
, UPDATED AVIATION DISCUSSION,
(today through Friday), The heat is expected to peak today with high temperatures around 5 degrees warmer for inland areas than Tuesday and around 5 to 10 degrees above average. High temperatures for today will range from the mid 70s to near 80 at the coast to the upper 90s to 108 for the Inland Empire with 110 to 114 for the lower deserts. High temperatures will cool a few degrees on Thursday. There will be greater cooling on Friday with high temperatures cooling to around average for Friday through Monday. High temperatures on Friday will range from the 70s near the coast to the 90s for the Inland Empire with 104 to 108 for the lower deserts.
The drying and stabilization trend of Tuesday will continue today with a slight chance of showers for this afternoon for the mountains. Some monsoonal moisture in south to southeast flow aloft will return for Thursday and Friday with a slight chance for afternoon showers, mainly in the mountains.
(Saturday through Tuesday), High temperatures will remain around through Monday. There is a slight chance for showers and thunderstorms each afternoon, mainly for the mountains.
151800z. Coast/Valleys, VFR prevailing. Very patchy low clouds with bases 700-1000ft MSL may impact coastal TAF sites again tonight. Highest chances for KSAN (~65-75% chance of CIGs overnight at KSAN, 45-50% chance for KCRQ and 30-45% chance for KSNA). Impacts most likely after 08z Thur. Any clouds will quickly move out by 16z Thur. Otherwise, FEW high clouds AOA 15,000ft MSL.
.Mountains/Deserts, SCT Cu based around 12,000ft MSL along with ISO TSRA over mountain ridges this afternoon and again Thursday afternoon. Otherwise, FEW-SCT high clouds AOA 15,000 ft and VFR.
No hazardous marine conditions are expected through Saturday.
Astronomical high tides will peak again around 7.0 feet this evening. High tides combine with a modest south swell (2 ft swell at 13-15 seconds from 190 degrees) to generate surf of 3-5 ft for south- facing beaches and 2-4 ft elsewhere. This will produce areas of coastal flooding in low lying areas, boardwalks, beach parking lots, and beach adjacent streets during evening high tides. A Beach Hazards Statement remains in effect through Wednesday evening and contains further details. There will be an increased risk of rip currents through Wednesday.
High amplitude southerly swell (4-5 ft) will arrive this weekend, bringing elevated surf and strong rip currents for Sunday and into early next week. Highest surf will be along south and southwest- facing beaches.
Ca, Beach Hazards Statement through this evening for Orange County Coastal Areas-San Diego County Coastal Areas.
Heat Advisory until 8 PM PDT Thursday for Orange County Coastal Areas-San Diego County Coastal Areas.
Extreme Heat Warning until 8 PM PDT Thursday for Coachella Valley-Orange County Inland Areas-Riverside County Mountains-San Bernardino County Mountains-San Bernardino and Riverside County Valleys-The Inland Empire-San Diego County Deserts-San Diego County Mountains-San Diego County Valleys-San Gorgonio Pass near Banning-Santa Ana Mountains and Foothills.
PZ, None.
