The warming trend will continue into the weekend with high temperatures today for the inland areas being around 8 to 12 degrees above average. This will be followed by a slow cooling trend into the middle of next week with high temperatures for next Wednesday around 5 degrees above average. This will be followed by a warming trend through the end of July into the first weekend in August, with better chances of afternoon thunderstorms over the mountains and deserts towards the end of next week.
For extreme southwestern California including Orange, San Diego, western Riverside and southwestern San Bernardino counties,
, UPDATED AVIATION DISCUSSION,
Today through tomorrow night,
Currently, low clouds are continuing to fill in along the coastal areas of San Diego and Orange counties, with very little eastward extent into the inland areas. This will likely continue to be the case, with weak offshore flow in place. Temperatures remain relatively mild at this hour, with upper 60s to low 70s being felt for most of the inland and coastal locations. These clouds should mix out and clear will likely occur for most of the inland areas through 8 AM.
There is going to be an influx of some mid level moisture from the southeast by later in the day, which may allow for a shower or possibly a shower to develop over the mountains by later this afternoon. Given that there will be a better surge of moisture and slightly better SB-CAPE values in place on Sunday, there will be a better chance of a few showers and/or thunderstorms developing over the mountains during the afternoon on Sunday. With the ridge only weakening and shifting eastward slightly through the weekend, hot temperatures will remain in place, especially for the Inland Empire, with little relief in the cooling of temperatures overnight.
Monday through Friday,
As the upper level ridge over the inner mountain west does shift a little further east through the early part of the week, with will allow for there to be a gradual cooldown and decrease in humidity values through Wednesday. This will be followed by an increase in temperatures, with a return to being anywhere from 10 to 15 degrees above the seasonal average towards the end of end week as the ridge begins to retrograde back to the west and strengthen, along with 600 dm heights over our desert regions by Thursday. There will also be better propagation of monsoonal waves advecting moisture in over the region, which will help to increase chances of afternoon thunderstorms for the mountains and deserts.
250600z. Coast/Valleys, Low clouds based 1000-1400 ft MSL are building along the coast, poised to push around 10 miles inland over the next few hours. VIS restrictions for anywhere where clouds intersect terrain. Low clouds will move out around 16-17z, with SKC and VFR prevailing thereafter. Low clouds will develop again after 04z Sun.
Mountains/Deserts, VFR conditions prevail through the TAF period. Cumulus building over the mountain Saturday afternoon AOA 20k ft MSL.
Calm conditions over the next week with waves 2 to 4 feet and afternoon wind gusts near 15 kts or less.
A 3 foot southerly swell with 12 second periods will continue to bring elevated surf 4-6 feet with sets to 7 feet to beaches through Sunday. Highest surf is expected along south-facing beaches. On Sunday, a 2 foot, long-period southwesterly swell will replace the current swell, keeping surf around 3-5 feet with sets to 6 feet. By mid-next week, a reinforcing 3-4 foot southerly swell will elevate surf once again, especially along south-facing beaches. High rip current risk will last through the upcoming week.
In addition to elevated surf, tides are expected to increase to a height of 6.0 to 6.5 feet MLLW by Sunday. The combination of surf and tides will result in minor coastal flooding during high tides.
Ca, Beach Hazards Statement through Sunday evening for Orange County Coastal Areas-San Diego County Coastal Areas.
Heat Advisory until 8 PM PDT Monday for Orange County Coastal Areas-Orange County Inland Areas-Riverside County Mountains- San Bernardino County Mountains-San Diego County Coastal Areas-San Diego County Valleys-Santa Ana Mountains and Foothills.
Extreme Heat Warning until 8 PM PDT Monday for Apple and Lucerne Valleys-Coachella Valley-San Bernardino and Riverside County Valleys-The Inland Empire-San Diego County Deserts- San Diego County Mountains-San Gorgonio Pass near Banning.
PZ, None.
