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PZZ750 Coastal Waters From San Mateo Point To The Mexican Border And Out To 30 Nm- 134 Am Pst Sat Dec 9 2023
Today..Wind east 10 to 15 knots with gusts to 20 knots... Becoming northwest this afternoon. Wind waves around 3 feet this morning...becoming 2 feet or less. SWell west 2 to 5 feet at 12 seconds.
Tonight..Wind east 10 to 15 knots. Wind waves around 2 feet or less...becoming 3 feet after midnight. SWell west 2 to 3 feet at 12 seconds.
Sunday..Wind east to 10 knots with gusts to 15 knots...becoming northwest in the afternoon. Wind waves around 2 feet or less. SWell west 1 to 2 feet at 11 seconds.
Sunday night..Wind variable less than 10 knots. Wind waves around 2 feet or less. SWell west 1 to 2 feet at 10 seconds.
Monday..Wind variable less than 10 knots. Wind waves around 2 feet or less. SWell west 2 to 3 feet at 13 seconds.
Monday night..Wind south 10 knots. Wind waves around 2 feet or less. SWell west 2 to 3 feet.
Tuesday..Wind southeast 10 knots. Wind waves around 2 feet or less. SWell west 3 feet.
Tuesday night..Wind southeast 10 knots in the evening... Becoming variable less than 10 knots. Wind waves around 2 feet or less. SWell west 2 to 3 feet.
Wednesday..Wind variable less than 10 knots. Wind waves around 2 feet or less. SWell west 2 to 3 feet.
Wednesday night..Wind northwest 10 knots in the evening... Becoming variable less than 10 knots. Wind waves around 2 feet or less. SWell west 1 to 2 feet.

PZZ700 134 Am Pst Sat Dec 9 2023
Synopsis for the far southern california coast..At 1 am, a 1034 mb high was over eastern oregon and a 1017 mb low was just off the orange county coast. Offshore flow will prevail today through Sunday afternoon. Some northeast gusts could exceed 20 knots near the san diego county coast mainly this morning and Sunday morning. A weak coastal eddy may again develop by early next week.

FXUS66 KSGX 091019 AFDSGX

Area Forecast Discussion National Weather Service San Diego CA 219 AM PST Sat Dec 9 2023

SYNOPSIS
High pressure building over the Great Basin this weekend will bring sunny days, clear nights and gusty Santa Ana winds to the mountains, foothills, and valleys. The strongest winds will occur today, but the warmest day will be Sunday as winds slowly weaken.
Slight cooling Monday and Tuesday, followed by minor warming and a return of weak Santa Ana winds by midweek.

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

Skies are mostly clear this morning as Santa Ana winds continue to strengthen. Surface pressure gradients are trending stronger offshore, currently around -5.5 mb SAN-DAG. Stronger winds currently remain confined to the passes and canyons and locally into the Inland Empire where gusts are mostly 25-45 mph with isolated gusts to around 50 mph. Winds are expected to strengthen through the morning, peaking near sunrise into the early afternoon with gusts of 35-50 mph and isolated gusts to around 60 mph in the wind-prone areas. Winds turn more easterly late today into Sunday, peaking across the San Diego County mountains and foothills while weakening elsewhere. Winds diminish Sunday night.
Otherwise gradual warming today and Sunday. For today, highs will be around 5-10 degrees normal for the coastal areas and western valleys but slightly below normal elsewhere. By Sunday much of the region will see highs of 5 to as much as 15 degrees above normal.
A few valley locations may even reach 80 degrees.

Slow cooling occurs Monday and Tuesday with little change for Wednesday as onshore flow returns and a weak trough moves inland to the north before digging south across the Great Basin. Dense fog could return to the coastal areas as early as Monday night, with night and morning low clouds and fog becoming more widespread Tuesday into Wednesday.

This digging trough will bring us another round of weak Santa Ana winds sometime Wednesday through Friday, clearing out any marine layer low clouds once again. An upper level ridge builds over the region Thu- Fri to aid with warming with highs above normal for the end of the week. Model solutions begin to diverge for next weekend with the timing and evolution of the next trough, which could bring rain sometime next weekend into early next week.
Slight chances of precipitation have been introduced for portions of the region Saturday evening, but there's a strong possibility that this system will slow down and the onset of precipitation will be delayed...if we end up getting anything at all.

AVIATION
090945Z...Mostly clear with unrestricted VIS through today. Strong northeast winds will develop first in passes and foothills, spreading into some valley corridors and eventually into some coastal corridors this morning. Strongest gusts 50-60 knots in foothills. Areas of moderate to strong up/downdrafts and LLWS expected. Winds will weaken after 23Z today, but continue breezy in these areas.

MARINE
Northeast or east winds gusting around 20 knots can be expected at times today. These can happen anywhere in the coastal waters, but are most likely near Camp Pendleton and at the Mexico border.
Otherwise, no marine weather hazards are expected through Wednesday.

FIRE WEATHER
...Red Flag Warning will be in effect from 8 AM this morning through Sunday afternoon for the Inland Empire...

Gusty northeasterly winds will continue to strengthen, peaking late this morning. Strongest winds will be below the Cajon Pass and into the Santa Ana Mountains where a few gusts of 60 mph or more are possible. Elsewhere, in the Inland Empire and along the coastal slopes of the mountains in wind- prone areas, east to northeast winds will be 20 to 30 mph, with peak gusts 35 to 50 mph this morning, through Sunday morning. Relative humidity will fall to around 10-15 percent by this afternoon and 8-12 percent for Sunday afternoon. Poor humidity recovery in the wind prone areas and thermal belts tonight with slight improvement Sunday night. This will create areas of elevated to critical fire weather conditions in the valleys.

Winds will remain in the 15-25 mph range with peak gusts in the of 40-50 mph in the wind-prone locations through Sunday morning, then weaken later in the day.

Conditions improve Monday through early Wednesday as weak onshore flow returns. There is the potential for weak Santa Ana winds again sometime Wednesday through Friday.

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



SGX WATCHES/WARNINGS/ADVISORIES
CA...Red Flag Warning from 8 AM this morning to 3 PM PST Sunday for San Bernardino and Riverside County Valleys -The Inland Empire.

Wind Advisory from 10 AM this morning to 3 PM PST Sunday for Riverside County Mountains-San Diego County Mountains-San Diego County Valleys-San Gorgonio Pass Near Banning.

Wind Advisory until 3 PM PST Sunday for Orange County Inland Areas-San Bernardino County Mountains-Santa Ana Mountains and Foothills.

PZ...None.

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San Clemente
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Sat -- 03:22 AM PST     Moonrise
Sat -- 06:13 AM PST     5.50 feet High Tide
Sat -- 06:42 AM PST     Sunrise
Sat -- 01:17 PM PST     0.12 feet Low Tide
Sat -- 02:20 PM PST     Moonset
Sat -- 04:42 PM PST     Sunset
Sat -- 07:20 PM PST     3.54 feet High Tide
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