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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 906 Pm Pst Sat Dec 2 2023
Synopsis for northern california waters..Gusty southerly winds focused in the northern outer zone will continue through the weekend, and will further increase on Monday. Winds will ease on Tuesday. A mid period swell in the low to mid teens will build through early tomorrow morning. This will be followed by a couple long period west- north west to north westerly swells up to the low to mid teens for Monday through mid week.

FXUS66 KEKA 022249 AFDEKA

AREA FORECAST DISCUSSION National Weather Service Eureka CA 249 PM PST Sat Dec 2 2023

SYNOPSIS
A period of heavy rainfall will impact Humboldt and Del Norte Counties this evening. Gusty ridgetop winds will also accompany the heavy rain. Additional light to moderate rainfall is expected Sunday into early next week, with a slight risk of heavy rainfall forecast to occur during mid week.

DISCUSSION
A warm front will advance north and east across the region this evening. As that takes place, 30-40 kt westerly flow in the 925-700 mb layer combined with a high PWAT airmass will aid in strong moisture flux that will encounter north-south oriented ridges in Humboldt and Del Norte Counties. Heavy orographically induced rainfall rates will be possible as a result, with peak rates from 0.5 to 1.0 inch per hour supporting a threat for debris flows across the Smith River Complex Burn Scar, as well as a threat for urban and small stream flooding. Otherwise, gusts to 40 mph will likely be observed across exposed Del Norte ridges this evening.

The strongest moisture flux is forecast to shift north into Oregon by mid Sunday morning, and then shift southward toward Del Norte County during the afternoon. Current model QPF for Sunday is not as heavy as what is depicted for Saturday evening, thus hydro impacts are expected to be less severe. Moist onshore flow then continues into early next week and will aid in additional light shower activity. 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. However, that kind of mesoscale evolution is associated with high uncertainty 3-4 days in advance.
After Wednesday, a progressive upper flow regime is forecast to persist and aid in additional rainfall.

Garner

AVIATION
The coastal terminals will continue to experience periods of moderate to heavy rainfall and gusty southerly winds.
There is a brief lull in activity this afternoon, but a surge of heavier rain and stronger southerly winds will develop after 0Z.
Gusts over 30 kts at times are probable at CEC. Winds will not be as strong at ACV, with some gusts over 20 kts possible. Low level wind shear will develop at CEC with this activity as well, lingering into early Sunday. Ceilings will range in the MVFR to IFR range, with periods of low visibility in the heavier rainfall.
Winds will be light in UKI, with lighter rainfall. Ceilings have been stubborn to lift from IFR, and this will remain an issue into Sunday at this terminal.

MARINE
A surge of southerly winds and heavier rainfall will quickly spread across the waters this afternoon. Gusts will reach 30 kts across the northern zones. This magnitude of southerly winds will remain near steady through Sunday, and will further increase and expand south on Monday. The southerlies will begin to ease Tuesday.

A northwest swell is building in this afternoon. The swell will peak late tonight through early Sunday morning in the 12 to 14 foot range at 14 seconds. The first of two long period west- northwest swells will build in on Monday, to the mid teens at 18 seconds. A second larger long period swell will move in on Tuesday through Wednesday.

HYDROLOGY
Strong westerly moisture flux will encounter the complex terrain of Del Norte and Humboldt County this evening/tonight. Heavy rain with peak rates ranging from 0.5 to 1.0 inch per hour will be possible as a result. Debris flows may occur due to heavy rain across the Smith River Complex Burn Scar during the 4 pm to 1 am time period. In addition, some urban and small stream flooding may be observed. Reference the latest flood hazard products for more information.

Garner

EKA WATCHES/WARNINGS/ADVISORIES
CA...
Flood Watch until 1 AM PST Sunday for CAZ101>103-105-106.

Flash Flood Watch until 1 AM PST Sunday for CAZ102.

NORTHWEST CALIFORNIA COASTAL WATERS...
Small Craft Advisory until 9 PM PST Sunday for PZZ450-455- 470-475.

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Humboldt Bay Entrance
Click for Map
Sat -- 04:04 AM PST     4.62 feet High Tide
Sat -- 07:22 AM PST     Sunrise
Sat -- 08:48 AM PST     3.86 feet Low Tide
Sat -- 12:01 PM PST     Moonset
Sat -- 02:02 PM PST     5.57 feet High Tide
Sat -- 04:49 PM PST     Sunset
Sat -- 09:47 PM PST     0.03 feet Low Tide
Sat -- 09:51 PM PST     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION

Humboldt Bay Entrance, California, Tide feet

Hookton Slough
Click for Map
Sat -- 04:28 AM PST     5.12 feet High Tide
Sat -- 07:22 AM PST     Sunrise
Sat -- 09:06 AM PST     3.86 feet Low Tide
Sat -- 12:01 PM PST     Moonset
Sat -- 02:26 PM PST     6.07 feet High Tide
Sat -- 04:49 PM PST     Sunset
Sat -- 09:51 PM PST     Moonrise
Sat -- 10:05 PM PST     0.03 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION

Hookton Slough, Humboldt Bay, California, Tide feet

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