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PZZ410 1010 Am Pst Thu Nov 30 2023
.strong Thunderstorms over the waters...
the areas affected include... Coastal waters from cape mendocino to pt. Arena ca out 10 nm... Coastal waters from pt. St. George to cape mendocino ca out 10 nm... Humboldt bay... Humboldt bay bar... Waters from cape mendocino to pt. Arena ca from 10 to 60 nm... Waters from pt. St. George to cape mendocino ca from 10 to 60 nm...
at 1008 am pst, doppler radar indicated strong Thunderstorms, capable of producing winds to around 30 knots. These Thunderstorms were located along a line extending from 18 nm north of trinidad head to 11 nm northwest of cape mendocino to 62 nm southwest of eureka, moving south at 15 knots.
precautionary/preparedness actions...
mariners can expect gusty winds to around 30 knots...locally higher waves...and lightning strikes. Boaters should seek safe harbor immediately until these storms pass.
&&
lat...lon 4173 12415 4110 12416 4098 12412 4076 12423 4087 12415 4085 12409 4083 12408 4080 12418 4070 12421 4070 12427 4071 12427 4044 12441 3973 12493 4008 12512 4072 12471 4178 12434 4178 12426

PZZ400 828 Am Pst Mon Dec 11 2023
Synopsis for northern california waters..Northerly breezes will return today and increase this evening. Gusts around 25 kt with wind waves near 6 feet are forecast in the lee of cape mendocino this evening. Otherwise, light north winds up to 15 kt are forecast through Tue. Light southerly breezes up to 15 kt are forecast to return on Wed and persist into Thu. Stronger southerlies up to 20 kt are possible on Fri over the outer waters and south of cape mendocino. A series of westerly swells will spread into the waters this week.

FXUS66 KEKA 111223 AFDEKA

AREA FORECAST DISCUSSION National Weather Service Eureka CA 423 AM PST Mon Dec 11 2023

SYNOPSIS
A few showers or sprinkles continue this morning in Humboldt and Del Norte counties. Drier weather and clearing skies are expected this afternoon through Wednesday morning. Increasing clouds and few light rain showers are possible Wednesday night or Thursday, otherwise dry weather is expected to continue into early Saturday. Late Saturday and into early next week there is a chance for rain.

DISCUSSION
A weak front moving into the northern portions of the area isn't bringing much more than clouds and a few sprinkles to the area. Del Norte county has seen the most rain, but still only around a tenth of an inch. A few more light showers are possible this morning, but any showers that do form should diminish by midday. Tonight and Tuesday high pressure starts to build back in over the area. This looks like to bring light easterly winds, but the BL looks like it remains fairly moist. So have added low clouds and fog to the valleys and portions of the coastal areas too. With this increase in moisture have raised the forecast low temperatures in the interior valleys and along the coast to more in line with the NBM. The southern Mendocino and southern Lake county valleys may remain clear so have left the temperatures cooler than the NBM. Skies are expected to clear by Tuesday afternoon across the area as high pressure builds in.
Tuesday night fog will likely form again in the interior valleys.

Wednesday high clouds will start to increase ahead of another very weak system pushing the ridge out of the way. Most of the models are showing little if any precip making it onshore. The best chance looks to be late Wednesday night and Thursday morning, but even then the front may not be able to break down the ridge and push onshore. There will likely be increased clouds even if there isn't much rain. The clouds may linger on Thursday and even into Friday. Temperatures will remain fairly steady in the 50s to around 60.

The next chance for rain is expected on Saturday. There is still a lot of uncertainty on the evolution of this system. Some of the models show the trough becoming a cutoff low well off the coast and delaying the precipitation until late Sunday. Others bring some rain in on Saturday with heavier rain on Sunday. There is the potential for a stronger atmospheric river late Saturday or Sunday, however there is also the potential for this to remain south of the area and NW CA only sees light rain. MKK

AVIATION
Surface observations and satellite imagery indicated overcast MVFR ceilings at all coastal reporting sites during the night. Shallow moist air associated with the remnants of a decaying front should push into coastal terminals this morning and increase the potential for light rain or drizzle with periods of IFR or LIFR cigs/vsbys through 18Z. Improvement will occur with increased mixing and solar insolation during the afternoon. High resolution model simulations continue to indicate a moisture rich boundary layer and N-NW onshore flow into the afternoon and overnight hours for coastal terminals. Thus, expect development of MVFR ceilings and possible IFR conditions at coastal terminals. Inland valleys will continue to have nightly night and morning fog and low clouds. NW breezes aloft at UKI will abate today, but with slightly higher humidity brief mist may occur. Otherwise, VFR conditions are forecast through the period for UKI.

MARINE
A relatively tranquil pattern (almost summer-like were it not for the low mid December sun angle) will hold through mid to late week (Thu). A mix bag of minor westerly swell groups will propagate into the waters through the week. Local wind wave generation is also forecast to remain low with sustained wind speeds under 15 kt. The exception will be late today into tonight in the lee of Cape Mendocino with northerlies increasing after a surface low/front dissipates this morning. An expansion fan is forecast to emerge late today into this evening in the lee of Cape Mendocino. A marginal advisory for small craft appears warranted with gusts around 25 kt and local wind wave generation approaching 6 ft or so.
Brief ramp up of northerlies will subside on Tue into Wed as a another decaying front approaches and busts down the offshore ridge and nearshore thermal trough. Light southerlies up to 15 kt will unfold on Wed and continue on Thu as surface ridging shifts inland and a low pressure system approaches 130W. Uncertainty increase late week and into next weekend (Fri-Sun) with the approach of a low pressure system from the SW. The low may stay too far away to the SW to do much more than run-of-the-mill S-SE winds of 15-25 kt in the outer waters. Or if the low comes slamming into a dominating and persistent block and plows down the ridge as some ensemble members and deterministic runs suggests, then S-SE winds around 30-40 kt are in the wide range of possibilities. It is still more than 5-7 days out and expect huge errors in placement, intensity and timing.

EKA WATCHES/WARNINGS/ADVISORIES
CA...
None.
NORTHWEST CALIFORNIA COASTAL WATERS...
Small Craft Advisory from 4 PM this afternoon to 7 AM PST Tuesday for PZZ475.

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Cape Mendocino
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Mon -- 03:14 AM PST     2.87 feet Low Tide
Mon -- 06:21 AM PST     Moonrise
Mon -- 07:30 AM PST     Sunrise
Mon -- 09:01 AM PST     6.27 feet High Tide
Mon -- 03:39 PM PST     Moonset
Mon -- 04:28 PM PST     -0.85 feet Low Tide
Mon -- 04:51 PM PST     Sunset
Mon -- 11:19 PM PST     4.40 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION

Cape Mendocino, California, Tide feet

Punta Gorda
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Mon -- 12:57 AM PST     -0.60 knots Max Ebb
Mon -- 03:59 AM PST     0.00 knots Slack
Mon -- 06:20 AM PST     Moonrise
Mon -- 06:56 AM PST     0.74 knots Max Flood
Mon -- 07:29 AM PST     Sunrise
Mon -- 09:40 AM PST     -0.00 knots Slack
Mon -- 01:09 PM PST     -1.46 knots Max Ebb
Mon -- 03:40 PM PST     Moonset
Mon -- 04:51 PM PST     Sunset
Mon -- 05:08 PM PST     0.00 knots Slack
Mon -- 08:11 PM PST     1.08 knots Max Flood
Mon -- 11:40 PM PST     -0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION

Punta Gorda, California Current, knots

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