Marine Weather and Tide Forecast for Dana Point, CA

DISCUSSION
FOR EXTREME SOUTHWESTERN CALIFORNIA INCLUDING ORANGE...
SAN DIEGO...WESTERN RIVERSIDE AND SOUTHWESTERN SAN BERNARDINO COUNTIES...

Morning Update

Low clouds will continue to clear out of coastal areas of Orange County and near Camp Pendleton this morning for mostly sunny conditions across the CWA through the afternoon and evening. High pressure over Baja California will begin to amplify over the Desert Southwest, bringing continued hot weather away from the coast. High temperatures will be near 5 to locally above 10 degrees above normal. Hottest temperatures across the high desert will be felt on Wednesday with moderate to high confidence in seeing temperatures near 105 degrees. Slow cooling will occur by Thursday and Friday with more noticeable cooling by the weekend with dry weather continuing for the foreseeable future.

.Previous Discussion (353 AM Tuesday)...

SHORT TERM (Tuesday through Thursday)...
The NKX sounding for late Monday afternoon showed that the marine layer was around 400 feet deeper than late Sunday afternoon with high temperatures for the coast and valleys on Monday not quite as hot as on Sunday. The marine layer is expected to fluctuate between 1000 and 1500 feet deep through Wednesday with night and morning coastal low clouds and fog extending into the far western valleys at times.

Through Wednesday, high temperatures will remain around 5 degrees above average near the coast to 10 to 15 degrees above average for the deserts. High temperatures through Wednesday will range from the lower 70s near the coast to the 90s for the Inland Empire with 112 to 117 for the lower deserts.

For Thursday into the weekend, a low pressure system moving from the eastern Pacific into the western states will weaken the high pressure aloft over southern California and strengthen the onshore lower-level flow. High temperatures on Thursday will cool to around average near the coast to 5 to 10 degrees above average for the deserts.

.LONG TERM (Friday through Monday)...
The cooling trend will continue into the weekend with the coast and valleys coolest on Saturday and the deserts on Sunday. High temperatures on Sunday will range from a few degrees below average near the coast to 5 to locally 10 degrees below average inland.
High temperatures on Sunday will range from around 70 near the coast to the upper 70s to upper 80s for the Inland Empire with around 100 for the lower deserts. The marine layer will deepen to 1500 to 2000 feet with night and morning coastal low clouds spreading farther into the valleys. Not much change is expected for early next week.

AVIATION
171530Z
Coast/Western Valleys
Mostly clear skies through the evening. Areas of low clouds will develop after 05Z with bases 500- 800 feet MSL and vis 3-5SM in BR, but locally 0-2SM on higher terrain. Scatter out Wednesday 14-16Z.

Inland Valleys/Mountains/Deserts
Clear skies and unrestricted VIS through Wednesday morning.

MARINE
No hazardous marine conditions are expected through Saturday.

SKYWARN
Skywarn activation is not requested. However weather spotters are encouraged to report significant weather conditions.



SGX WATCHES/WARNINGS/ADVISORIES
CA...Heat Advisory until 8 PM PDT Wednesday for Riverside County Mountains-San Bernardino and Riverside County Valleys-The Inland Empire-San Diego County Mountains-San Diego County Valleys.

Heat Advisory until 8 PM PDT this evening for Orange County Inland Areas-Santa Ana Mountains and Foothills.

PZ...None.