Sunrise 6:23 AM   Sunset 7:39 PM Moonrise 2:04 PM   Moonset 3:08 AM

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PZZ670 Point Piedras Blancas To Point Sal From 10 To 60 Nm- 916 Pm Pdt Wed Apr 17 2024
Tonight - NW winds 10 to 20 kt with local gusts to 25 kt. Strongest western portion. Wind waves 2 to 4 ft. NW swell 5 ft at 10 seconds. S swell 5 ft after midnight. Vsby 1 nm or less after midnight. Thu - NW winds 10 to 15 kt. Wind waves 2 ft or less. NW swell 5 ft at 10 seconds. S swell 5 ft, then S 3 ft in the afternoon. Areas of fog in the morning. Thu night - NW winds 10 to 15 kt in the evening, becoming 5 to 10 kt. Wind waves 2 ft or less. Mixed swell nw 4 to 6 ft at 9 seconds and S 3 ft at 15 seconds. Patchy fog after midnight. Fri - NW winds 5 to 10 kt, becoming 10 to 15 kt in the afternoon. Wind waves 2 ft or less. Mixed swell nw 4 to 5 ft at 9 seconds and S 3 ft at 14 seconds. Patchy fog in the morning. Fri night - NW winds 10 to 15 kt. Wind waves 2 ft or less. Mixed swell nw 3 to 4 ft at 7 seconds and S 3 ft at 14 seconds. Sat - NW winds 15 to 25 kt with gusts to 30 kt. Combined seas 5 to 6 ft dominant period 8 seconds, building to 7 to 8 ft dominant period 8 seconds in the afternoon. Sat night - NW winds 20 to 30 kt with gusts to 35 kt. Combined seas 7 to 9 ft dominant period 7 seconds. Sun - NW winds 15 to 25 kt. Combined seas 8 to 9 ft. Mon - NW winds 10 to 20 kt. Wind waves 2 to 4 ft. NW swell 7 to 9 ft. Patchy fog.

PZZ600 916 Pm Pdt Wed Apr 17 2024
synopsis for the southern california coast and santa barbara channel including the channel islands national marine sanctuary and national park - .at 04z, or 9 pm pdt, a 1034 mb high was over vancouver island while a 1006 mb low was over nevada.

FXUS66 KLOX 180507 AFDLOX

Area Forecast Discussion...UPDATED National Weather Service Los Angeles/Oxnard CA 1007 PM PDT Wed Apr 17 2024

SYNOPSIS
17/938 PM.

High pressure keeps dry conditions in the area for the near future, and low clouds and fog during the nights and morning will reoccur through Friday. A warming trend is expected for the weekend before cooler temperatures return next week.

.SHORT TERM (WED-SAT)...17/1007 PM.

***UPDATE***

Another warm day of high pressure was in store for today, with the exception of the southern coastal waters and coasts where a solid deck of marine layer clouds lingered south of Point Conception.
Temperatures warmed into the upper 70s and 80s over much of the region, however most coastal valleys and coasts south of Point Conception ended up a few degrees cooler than yesterday due to more onshore flow.

Tonight, marine layer clouds have been slow to form in part due to all the high clouds in the region. Low clouds and patchy fog are expected to move into most coasts and coastal valleys overnight. There is still potential for dense fog close to the ocean early Thursday morning. Low pressure moves through the region Friday, so expecting a deepening marine layer pushing further deeper into the valleys Friday morning. Expecting warming temperatures Saturday as ridging returns. The current forecast looks on track, but will need to consider if more marine layer clouds will form Friday night/Saturday AM.

***From Previous Discussion***

A relatively quiet period of weather coming up over the next several days. A weak trough is approaching the West Coast with a ton of high clouds. Otherwise the main impact will be increasing onshore flow and marine layer stratus (as those near the coast south of Pt Conception today can attest to) and cooler temperatures through Friday. Forecast soundings only indicate minor deepening of the marine inversion tonight so there will still be areas of dense fog near the coast and just very little if any valley fog intrusion expected. The cooler onshore flow mainly just reached the coastal areas but by tomorrow and Friday cooling will reach all the way into the interior with highs topping out in the mid to upper 70s versus the 80s today.

The cooling trend will reverse over the weekend with a brief but effective ridge over California this weekend. Temperatures should bounce back to the 80s inland with a 10-20% chance of an isolated 90 or two in the warmest valleys Sunday.

.LONG TERM (SUN-WED)...17/207 PM.

The weekend ridge will be short lived as the next weak trough is expected to hit the West Coast late Monday and likely remain in place through the week. This will generate significant cooling across the area with a likely return of a deep marine layer by mid to late week. Ensembles have been hinting at some precipitation chances as well, though those were likely associated with a small percentage of solutions that showed the upper low cutting off and dropping much farther south along the coast. A majority favor an open wave solution with the upper low over Oregon and extreme northern California. There are some deeper trough solutions later in the week and into next weekend that could squeeze out some light precip by next weekend, probably more in the form of deep marine layer drizzle. In any case, it looks like a long duration of well below normal temperatures across the area starting next week.

AVIATION
18/0347Z.

At 00Z, the marine layer at KLAX was about 600 ft deep. The top of the inversion was at 2200 ft with a temp of 19 deg C.

High confidence in desert and valley TAFs. Low confidence for coastal TAFs with widespread low clouds are expected tonight, with IFR to LIFR conds, and local VLIFR conds on the Central Coast.
High clouds may disrupt low clouds from forming.

KLAX...Moderate to low confidence in the 00Z TAF. There is a 20% chance that cigs tonight will be in the MVFR category and a 20% chance that cigs will not arrive until as late as 12Z. Any east wind component should remain less than 6 knots.

KBUR...High confidence in the 00Z TAF with VFR conds thru the pd.
There is a 20% chance of LIFR cigs after 11Z Thu.

MARINE
17/947 PM.

A very shallow marine layer will continue to bring dense fog to most waters south of Point Conception into this morning. There is a chance that dense fog will also form off the Central Coast, but low confidence. Improved but still reduced visibility is expected during the day.

High confidence in generally light winds through Friday.
Southeast winds around 10 knots are expected each morning from the Santa Barbara Channel to Orange County, with some local enhancements through the Anacapa Passage and San Pedro Channel.

Northwest winds will be increasing over the weekend.

LOX WATCHES/WARNINGS/ADVISORIES
CA...NONE.
PZ...Small Craft Advisory in effect until 3 AM PDT Thursday for zone 670. (See LAXMWWLOX).

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Morro Bay
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Thu -- 02:07 AM PDT     2.01 feet Low Tide
Thu -- 04:09 AM PDT     Moonset
Thu -- 06:26 AM PDT     Sunrise
Thu -- 07:34 AM PDT     3.75 feet High Tide
Thu -- 02:42 PM PDT     0.44 feet Low Tide
Thu -- 03:03 PM PDT     Moonrise
Thu -- 07:39 PM PDT     Sunset
Thu -- 09:20 PM PDT     3.59 feet High Tide
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