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PZZ750 Coastal Waters From San Mateo Point To The Mexican Border And Out To 30 Nm- 107 Pm Pdt Wed Oct 4 2023
Tonight..Wind northwest 10 to 15 knots...becoming north after midnight. Wind waves around 2 feet or less. Mixed swell northwest 2 feet at 10 seconds and south 1 to 2 feet at 11 seconds.
Thursday..Wind variable less than 10 knots...becoming west to 10 knots with gusts to 15 knots in the afternoon. Wind waves around 2 feet or less. Mixed swell west 2 feet at 12 seconds and south 1 to 2 feet at 11 seconds.
Thursday night..Wind northwest to 10 knots in the evening... Becoming variable less than 10 knots. Wind waves around 2 feet or less. Mixed swell west 2 feet at 9 seconds and south 1 to 2 feet at 12 seconds.
Friday..Wind variable less than 10 knots...becoming west 10 knots with gusts to 15 knots in the afternoon. Wind waves around 2 feet or less. Mixed swell west 2 feet at 6 seconds and south 1 feet at 16 seconds.
Friday night..Wind northwest to 10 knots in the evening... Becoming variable less than 10 knots. Wind waves around 2 feet or less. Mixed swell west 2 feet at 6 seconds and south 1 to 2 feet at 16 seconds.
Saturday..Wind variable less than 10 knots...becoming west 10 knots in the afternoon. Wind waves around 2 feet or less. Mixed swell west 2 feet and south 1 to 2 feet.
Saturday night..Wind variable less than 10 knots. Wind waves around 2 feet or less. Mixed swell west 2 feet and south 1 to 2 feet.
Sunday..Wind variable less than 10 knots...becoming west 10 knots in the afternoon. Wind waves around 2 feet or less. Mixed swell west 2 feet at 12 seconds and south 2 feet at 14 seconds.
Sunday night..Wind northwest 10 knots in the evening...becoming variable less than 10 knots. Wind waves around 2 feet or less. Mixed swell west 2 feet at 6 seconds and south 2 feet at 13 seconds.
Monday..Wind variable less than 10 knots...becoming west 10 knots with gusts to 15 knots in the afternoon. Wind waves around 2 feet or less. Mixed swell west 2 feet at 6 seconds and south 2 feet at 12 seconds.
Monday night..Wind north 10 knots...becoming south after midnight. Wind waves around 2 feet or less. Mixed swell west 2 to 3 feet at 6 seconds and south 2 to 3 feet at 12 seconds.

PZZ700 107 Pm Pdt Wed Oct 4 2023
Synopsis for the far southern california coast.. At 1 pm, a 1028 mb high was about 400 nm west of seattle and a 1012 mb low covered coastal southern california. Generally weak onshore flow, mainly from the northwest, will prevail through Sunday. Weak offshore breezes may be noted near shore during the nights and mornings through Friday.

FXUS66 KSGX 042018 AFDSGX

Area Forecast Discussion National Weather Service San Diego CA 117 PM PDT Wed Oct 4 2023

SYNOPSIS
Strong high pressure over the eastern Pacific, and offshore flow, will bring much warmer weather through the end of the week. Easterly winds will be gusty at times below the passes, and along the coastal foothills, warming and drying the valleys, while sea breezes moderate coastal areas each day, along with a weak eddy at times.
Over the weekend, a weak trough will develop off the coast, starting a cooling trend, first near the coast, and then inland into next week. This will coincide with a return, and increase in coverage of night and morning low clouds and fog.

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

Skies were completely clear over SoCal midday. The offshore sfc pressure gradient has been primarily from the Great Basin today, and was nearly 10 mbS late this morning from KTPH to KLAX. This has resulted in peak, local wind gusts of around 45 MPH in the most wind prone areas just below the major passes and coastal facing canyons.
It was noticeably warmer most areas at midday too, with temp jumps of 5-10F over yesterday.

A ridge is building over the West Coast today, and will be with us for the remainder of the week. With the ridge core over the PacNW, the weakness farther south gradually succumbs to a weak low approaching from the EastPac along 30N by late Friday. Besides supporting a weak coastal eddy, this low may also grab some subtropical moisture from the south, and decorate our skies with some high clouds and colorful sunrises/sets. The ridge subsequently shifts inland over the weekend, eventually giving way to more broad troughing into next week.

The main forecast concern then, is the warming that will occur over the next couple of days. The offshore flow never makes it to the coast, based on the high resolution guidance, but winds do gust well into the 40 MPH range in the favored areas below passes and canyons.
This will advect drier air into the valleys, which favors a wider diurnal temperature range each day, especially at lower elevations inland, where nocturnal winds decouple from the boundary layer.
Where some wind remains, the nights will be quite mild, with lows in the 60s. Still, with the shorter days now, and these cooler nights, the Heat Risk calculation runs a bit lower than on summer days. We do reach moderate levels in some areas, but it is marginal, and not as widespread, or persistent enough to warrant an Advisory at this time.

What this distills down to, is for warm to hot afternoons, and mild to cool nights through Saturday. After that, we begin to feel more of the low offshore, and a shallow marine layer returns this weekend, reducing the marginal Heat Risk values from west to east.
Highs in the 90s from the mesas to the coastal slopes, and 80s along the coast, tick down through the weekend and into next week. Based on current guidance, we expect highs to gradually slide back to average by Tuesday of next week, and drop further through the middle of the week.

AVIATION
041935Z...FEW-SCT with bases 200-400 FT MSL and BR along immediate coast 07z-12z Thu.

Otherwise, clear skies with unrestricted vis through Thu.

MARINE
No hazardous marine conditions are expected through Sunday.

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

SGX WATCHES/WARNINGS/ADVISORIES
CA...None.
PZ...None.

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San Clemente
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Wed -- 01:56 AM PDT     3.22 feet High Tide
Wed -- 06:00 AM PDT     2.57 feet Low Tide
Wed -- 06:46 AM PDT     Sunrise
Wed -- 12:37 PM PDT     Moonset
Wed -- 12:37 PM PDT     5.22 feet High Tide
Wed -- 06:30 PM PDT     Sunset
Wed -- 08:43 PM PDT     0.55 feet Low Tide
Wed -- 10:17 PM PDT     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION

San Clemente, California, Tide feet

La Jolla
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Wed -- 02:13 AM PDT     3.26 feet High Tide
Wed -- 05:53 AM PDT     2.81 feet Low Tide
Wed -- 06:45 AM PDT     Sunrise
Wed -- 12:33 PM PDT     Moonset
Wed -- 12:37 PM PDT     5.20 feet High Tide
Wed -- 06:29 PM PDT     Sunset
Wed -- 08:47 PM PDT     0.63 feet Low Tide
Wed -- 10:17 PM PDT     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION

La Jolla, Scripps Pier, California, Tide feet

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San Diego, CA,