Sunrise 6:17 AM   Sunset 8:10 PM Moonrise 11:37 PM   Moonset 7:19 AM

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PZZ410 1057 Pm Pdt Wed Mar 27 2024
a marine weather statement has been issued for the following areas - . 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 1056 pm pdt, doppler radar indicated strong Thunderstorms, capable of producing winds to around 30 knots and small hail. These Thunderstorms were located along a line extending from 12 nm northwest of cape mendocino to 37 nm southwest of eureka, moving northeast at 25 knots.
precautionary/preparedness actions - .
water spouts are possible along with stronger Thunderstorms - .locally higher waves - .and lightning strikes. Boaters should seek safe harbor immediately until these storms pass.
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.
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lat - .lon 4082 12409 4080 12413 4081 12416 4080 12418 4075 12419 4072 12422 4070 12421 4069 12423 4071 12427 4061 12433 4044 12441 4039 12437 4023 12480 4061 12466 4087 12416 4076 12423 4086 12415 4085 12412 4086 12410

PZZ400 859 Am Pdt Sat Apr 27 2024
Synopsis for northern california waters - Gentle to fresh south winds will develop ahead of an approaching cold front with relatively stronger wind focused over the northern outer waters this afternoon and tonight. Winds will shift to the northwest by late tonight behind the passing cold front with gentle to moderate northwest winds persisting through Sunday, before increasing to moderate to strong breezes Sunday night into Monday. The nw swell around 6 feet at 9 seconds is slow diminishing and a new swell is building in around 15 seconds. These will be combine around 5 to 7 feet at 12 seconds on Sunday.

FXUS66 KEKA 271250 AFDEKA

AREA FORECAST DISCUSSION National Weather Service Eureka CA 550 AM PDT Sat Apr 27 2024

SYNOPSIS
Light rain in the northern half of the forecast area is expected this morning through Sunday. Cold temperatures could cause frost at lower elevations as cold air advection sets in. Drier weather weather is expected early next week.



DISCUSSION
Synoptic scale views of 500mb heights show a persistent eastern Pacific high pressure system near the 140W - 150W longitude and the 30N latitude. A PWAT heavy moisture plume will wrap around the top of this high pressure system, aided by an upper level low positioned over the Aleutian islands. The upper level jet streaks between these two pressure cogs with the moisture plume following geostrophic flow. A surface shortwave feature over the coast will bring precipitation to bear on the PNW as the cold front arrives a few hours after day break. Most of the precipitation will accumulate north of Cape Mendocino. The probability of a rainfall total greater than 0.15 inches is 50% through Sunday morning in Del Norte and N Humboldt, when rain is expected to cease.

A cold core upper level low spinning off the coast of Alaska will aide in cold air advection, at least until the previously mentioned eastern Pacific high dominates our CWA with ridging and warmer air by early next week. A frost advisory has been hoisted for morning for elevations below 3000 feet, between 33 and 36 degrees. This has been isolated to valleys of Trinity, and Northern Mendocino counties.

Otherwise, broad and flat ridging is forecast to build offshore as a series of shortwave troughs brush the northern portion of the area, mostly Del Norte county, with periodic precipitation chances into mid week. Low-amplitude westerly flow will most likely keep temperatures on the mild side and near seasonal normals through early next week. Greater uncertainty arises mid to late week with potential for flow amplification over the NE Pacific and above normal interior temperatures. /EYS



Aviation
Low clouds are in place in many of the interior valleys and along some of the coast. These are expected to lift later this morning as a weak front approaches the area bringing southerly winds of 10 to 20 kt today to the northern areas. This afternoon this front will bring some light rain to KCEC and KACV. This will gradually bring some lower ceilings late this afternoon and evening along the Humboldt and Del Norte county areas. KUKI is only expected to see some high clouds and breezy northwest winds. In the north the ceilings will drop to IFR later tonight. Sunday clouds are expected to clear in the morning in most areas. MKK



Marine
10 to 20 kt northerly winds will diminish this morning as a weak front brings southerly winds up to 20 kt to areas north of Cape Mendocino later this morning and into the afternoon. The short period wind driven waves will diminish through the day as well. The main swell moving into the waters this morning is around 5 feet at 9 seconds. A new swell hast started to move into the waters and currently it is around 2 feet at 14 seconds.

Sunday the northwest winds will return across the area as high pressure builds in. These will be slow to increase through Monday lingering around 10 to 20 Kt. These are expected to increase to around 20 to 25 kt on Tuesday and persist through Thursday. The wind driven waves associated with these winds are expected to peak around 6 to 9 feet by the middle of the week. In addition to the wind driven waves the two swells are expected to generally merge on Sunday. These will be around 8 feet at 12 seconds. These are expected to diminish slightly, but will generally persist through the week. MKK



EKA WATCHES/WARNINGS/ADVISORIES
CA...
Frost Advisory until 8 AM PDT this morning for CAZ107-108- 110-111-114.

NORTHWEST CALIFORNIA COASTAL WATERS...
Small Craft Advisory until 6 PM PDT this evening for PZZ455- 475.

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Bucksport
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Sat -- 01:58 AM PDT     7.19 feet High Tide
Sat -- 06:19 AM PDT     Sunrise
Sat -- 08:18 AM PDT     Moonset
Sat -- 09:14 AM PDT     -0.52 feet Low Tide
Sat -- 04:16 PM PDT     5.15 feet High Tide
Sat -- 08:09 PM PDT     Sunset
Sat -- 08:40 PM PDT     3.66 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION

Bucksport, Humboldt Bay, California, Tide feet

Hookton Slough
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Sat -- 01:59 AM PDT     6.92 feet High Tide
Sat -- 06:19 AM PDT     Sunrise
Sat -- 08:19 AM PDT     Moonset
Sat -- 09:31 AM PDT     -0.50 feet Low Tide
Sat -- 04:17 PM PDT     4.90 feet High Tide
Sat -- 08:09 PM PDT     Sunset
Sat -- 08:57 PM PDT     3.56 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION

Hookton Slough, Humboldt Bay, California, Tide feet

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