Santa Ana winds will weaken this morning with weaker and more localized winds continuing at times into Friday morning. Patchy night and morning coastal low clouds could return near the coast over the weekend. The coast into the valleys will warm today while the deserts cool. There will be a warming trend for all areas for Sunday through Wednesday with high temperatures for next Tuesday and Wednesday as much as 12 to 18 degrees above average for the lower elevations of the mountains and for the inland valleys.
For extreme southwestern California including Orange, San Diego, western Riverside and southwestern San Bernardino counties,
.Morning Update,
Mid-level clouds continue to dissipate, which led to a gorgeous sunrise across the region this morning. Santa Ana winds continue to become more localized with gusts near mountain passes and adjacent foothills gusting near 20-35 MPH. This trend will continue through the day as a trough pushes further east into the Great Plains, allowing the pressure gradient to relax. The forecast remains on track for lighter offshore flow to continue into Friday across these regions with a warming trend by Sunday into next week.
.Previous Discussion (230 AM Thursday),
(today through Saturday),
For San Diego County except for northwest San Diego County, winds through sunrise are expected to gradually decrease in strength and coverage with more localized and weaker winds continuing at times into Friday morning. Below the Cajon Pass and along the below the coastal slopes of the Santa Ana Mountains, winds are expected to increase in coverage through around sunrise, then decrease in strength and coverage through the morning with more localized and weaker winds continuing into Friday morning.
The local WRF shows some patchy low clouds could return near coast of southern San Diego County and northern Orange County early Friday. More widespread coverage over the coastal waters may return for Friday night into Saturday morning, locally reaching the coast.
High temperatures for today will warm for the coast into the valleys and cool for the lower deserts. Cooling will begin to spread into coastal areas on Friday as inland areas warm. On Saturday, inland areas will continue to warm a few more degrees with not much change near the coast. High temperatures on Saturday will range from the lower to mid 60s near the coast to the upper 60s to mid 70s for the valleys with the lower to mid 70s for the lower deserts.
(Sunday through Wednesday), Subtropical high pressure over the eastern Pacific will extend to near the coast of Baja and southern California with dry generally northwest flow aloft over southern California. A warming trend will continue for Sunday through Tuesday with not much change on Wednesday. There will be weak offshore flow around Monday and Tuesday of next week, but with less drying and weaker winds than for the ongoing offshore flow.
High temperatures on Sunday will be a few to around 5 degrees above average for the coast and valleys and within a few degrees of average for the mountains and deserts. High temperatures on Sunday will range from the mid to upper 60s near the coast to the 70s for the valleys and inland Orange County with the mid to upper 70s for the lower deserts.
With the warming, high temperatures for Tuesday and Wednesday will be as much as 12 to 18 degrees above average for the lower elevations of the mountains and for the inland valleys. High temperatures on Wednesday will range from around 70 near the coast to the mid 70s to lower 80s for the valleys with the lower 80s for the lower deserts.
041630z. Northeast winds 25-35 kts continue this morning from the foothills locally westward into eastern valleys, with MOD up/downdrafts, along with pockets of LLWS where winds do not surface. Winds will taper off and become more localized, confined to mountain passes and foothills, after 18Z, continuing in these areas into early Friday. Mostly clear skies through the period.
No hazardous marine conditions are expected today through Tuesday.
Very high tides will occur this morning and Friday morning, threatening coastal flooding, minor tidal overflow and beach erosion. Chances of these impacts are highest this morning as elevated surf up to 5 feet will combine with the high tides, mostly in San Diego County. Check the Coastal Hazard Message for details.
Ca, Beach Hazards Statement through Friday morning for Orange County Coastal Areas-San Diego County Coastal Areas.
PZ, None.
