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PZZ415 Expires:202311301915;;665991 Fzus76 Keka 301810 Mwseka
marine weather statement national weather service eureka ca 1010 am pst Thu nov 30 2023
pzz410-415-450-455-470-475-301915- 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 926 Pm Pst Sun Dec 3 2023
Synopsis for northern california waters..Gusty southerly winds focused in the northern outer waters will continue through the weekend, and will peak tomorrow. Winds will increase again ahead of a front that will pass through the region by the middle of the week. The first of a series of mid to long period swells has filled in tonight, with a couple more elevated swells anticipated to arrive tomorrow through midweek.

FXUS66 KEKA 032256 AFDEKA

AREA FORECAST DISCUSSION National Weather Service Eureka CA 256 PM PST Sun Dec 3 2023

SYNOPSIS
Heavy rainfall continues to impact northern Humboldt and Del Norte counties this afternoon through late tonight. Gusty ridgetop winds are also accompanying the heavy rain. Additional light to moderate rainfall is expected early next week, with a stronger system with the potential of heavy rainfall to occur during mid week.



DISCUSSION
Moisture flux associated with a moderately strong atmospheric river has dropped southward toward Del Norte county today to bring another round of moderate to heavy rain, mostly for northern Humboldt and Del Norte Counties. Gusty southerly winds from 25 to 40 mph are being recorded over the more prominent coastal headlands and higher terrain across the northern portion of the region. Late morning RAP mesoanalysis verified anomalous PWAT values at 1-1.25 inches along the Far North Coast. Additional rainfall amounts will be 1 to 2 inches for Del Norte and far northern Humboldt counties from today through late tonight, with locally higher amounts over higher terrain in Del Norte.
Maintained the Flood Watch for urban/small streams across Del Norte and the northern portion of Humboldt counties, though it may require trimming from the southern portion. Elsewhere, lighter total amounts will range from few hundredths to half of an inch.

Moist onshore flow then continues into early next week and will aid in additional shower activity. PWATS will remain anomalously high on Monday, but the highest moisture flux will be north of the CWA, and there will be more of an easterly component to the low level winds. This will limit the potential for heavier precipitation rates on Monday, but the soils will remain nearly saturated to saturated over the Far North Coast. A stronger frontal system is forecast to advance east across the NERN PAC as well, with hydro hazards generally focused over WA/OR Monday night into Tuesday.
The front is then forecast to slide south toward NWRN CA Tuesday night into Wednesday. A midlevel shortwave impulse may interact with the front and yield an increase in precipitation rates as the front moves onshore across the EKA CWA. After Wednesday, a progressive upper flow regime is forecast to persist and aid in additional rainfall, along with colder temperatures and some mountain snow. ZVS/JJW



AVIATION
Conditions have stayed mostly VFR/MVFR today. There were sporadic bouts of rain, especially over Del Norte where weather had a "yo yo" effect: up and down from VFR-IFR. Impactful weather can be expected for ACV and CEC through afternoon/evening as model data continues a trend of rain for the northern areas; lesser amounts over Mendocino and Lake Counties. Added the possibility of mostly directional low level wind shear (LLWS) at CEC...which may be more concerning for general aviation. Also, gusty southerly winds will continue at CEC due a pronounced pressure gradient flow. Precipitation should remain simply "RA", but a few embedded "SHRA" not out of the question today. /TA



MARINE
Southerly winds gusting up to 30 kts will continue through tonight, mainly focused in the northern zones. The southerly winds will increase on Monday when gusts with near gale strength in isolated northern areas. The southerlies will strengthen again early Tuesday along a dynamic frontal system. A northwest swell peaked this afternoon in the 12 to 15 foot range at 14 seconds.
The first of two long period west- northwest swells will build tonight and through Monday, to the mid teens at 18 seconds. A second larger, long period swell will then begin filling in on Tuesday, peaking early Wednesday in the upper teens at 18 to 19 seconds.



HYDROLOGY
Additional moderate to heavy rainfall with a moderately-strong atmospheric river will continue to impact the northern portion of the CWA today. 24 hours total rainfall amounts are forecast to range from 1 to 2 inches in Del Norte and far northern Humboldt counties. More flash flooding impacts are likely today mainly across Del Norte County due to additional rain falling in a short amount of time. CREST soil moisture profile continues to show the terrain to be saturated. As result, the additional rainfall today will more quickly develop urban and small stream flooding, or even flash flooding. In addition, small rock and mud slides are possible in areas of steep terrain that are already saturated. Reference the latest flood hazard products for more information. /ZVS



BEACH HAZARDS
A long period northwesterly swell will begin to build in through the coastal waters tonight, and will continue to build into Monday to around 14 feet at 18 seconds. This swell will be sufficiently powerful enough for sneaker waves from significant set behavior and beach runup. Large, unexpected waves can sweep across the beach without warning, sweeping people into the sea from rocks, jetties, and beaches. These sneaker waves can also move large objects such as logs, crushing anyone caught underneath. A second larger, long period swell will then begin filling in on Tuesday, peaking early Wednesday in the upper teens at 18 to 19 seconds. This will generate High Surf Advisory level surf breakers up to 25 feet Tuesday afternoon through Wednesday.



EKA WATCHES/WARNINGS/ADVISORIES
CA...
Flood Watch through late tonight for CAZ101>103-105-106.

Beach Hazards Statement from Monday morning through Monday afternoon for CAZ104-109.

NORTHWEST CALIFORNIA COASTAL WATERS...
Small Craft Advisory until 9 PM PST this evening for PZZ450.

Small Craft Advisory until 3 AM PST Monday for PZZ455-475.

Small Craft Advisory until 9 PM PST Monday for PZZ470.

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Eureka Slough Bridge
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Mon -- 06:23 AM PST     5.99 feet High Tide
Mon -- 07:24 AM PST     Sunrise
Mon -- 11:11 AM PST     3.72 feet Low Tide
Mon -- 12:49 PM PST     Moonset
Mon -- 04:42 PM PST     5.73 feet High Tide
Mon -- 04:48 PM PST     Sunset
Mon -- 09:51 PM PST     Last Quarter
Mon -- 11:27 PM PST     0.91 feet Low Tide
Mon -- 11:54 PM PST     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION

Eureka Slough Bridge, Humboldt Bay, California, Tide feet

Humboldt Bay (south jetty)
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Mon -- 06:04 AM PST     5.26 feet High Tide
Mon -- 07:24 AM PST     Sunrise
Mon -- 11:20 AM PST     3.63 feet Low Tide
Mon -- 12:50 PM PST     Moonset
Mon -- 04:14 PM PST     5.06 feet High Tide
Mon -- 04:49 PM PST     Sunset
Mon -- 09:51 PM PST     Last Quarter
Mon -- 11:31 PM PST     0.93 feet Low Tide
Mon -- 11:54 PM PST     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION

Humboldt Bay (south jetty), California (expired 1984-12-31), Tide feet

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Eureka, CA,