Widespread Major to locally Extreme HeatRisk will continue for the coastal areas into the western valleys through Thursday with high temperatures for the valleys of 100 to 105 each day. A low pressure system developing over the western states for Monday of next week will bring a cooling trend for Friday through next weekend with high temperatures cooling to 4 to 8 degrees below average for next Sunday.
For extreme southwestern California including Orange, San Diego, western Riverside and southwestern San Bernardino counties,
, UPDATED AVIATION DISCUSSION,
(today through Wednesday), A weak sea breeze will cool high temperatures near the coast a few more degrees today with not much change farther inland with the hottest high temperatures for today, of 100 to 105, for the western valleys and inland Orange County. Onshore flow on Tuesday will cool high temperatures a few more degrees along the coast with slight cooling extending inland into the valleys. On Wednesday, high temperatures will cool a few more degrees near the coast with the mountains, deserts, and inland valleys warming a few to around 5 degrees.
On Wednesday, high temperatures will still be mostly 15 to 20 degrees above average for the valleys and inland coastal areas with the coast 10 to 15 degrees above average. High temperatures on Wednesday will be in the mid 80s to lower 90s near the coast to the upper 90s to 105 for the Inland Empire.
(Thursday through Sunday), On Thursday, there will only be slight changes in high temperatures for most areas with inland Orange County and the Inland Empire cooling a few to around 5 degrees. A low pressure system developing over the western states for Monday of next week will bring a cooling trend for Friday through next weekend with high temperatures cooling a few to around 5 degrees on Friday and another 4 to 8 degrees on Saturday and again on Sunday. High temperatures on Sunday will be around 4 to 8 degrees below average, ranging from the 70s near the coast to the lower to mid 80s for the Inland Empire with the lower deserts in the lower to mid 90s.
051130z, SKC and VFR today and tonight. Local easterly breezes through 20Z gusting to 25 knots in foothills and eastern valleys. MOD UDDFS expected over coastal slopes.
No hazardous marine conditions are expected through Friday.
Increasing south swell this week, along with high tides during the evenings could lead to minor coastal flooding and beach erosion. A Beach Hazards Statement contains the details.
Ca, Extreme Heat Warning until 8 PM PDT Thursday for Orange County Coastal Areas-Orange County Inland Areas-San Bernardino and Riverside County Valleys-The Inland Empire-San Diego County Coastal Areas-San Diego County Valleys-Santa Ana Mountains and Foothills.
Beach Hazards Statement from Tuesday afternoon through Friday evening for Orange County Coastal Areas-San Diego County Coastal Areas.
PZ, None.
