Sunrise 5:53 AM   Sunset 8:25 PM Moonrise 4:56 PM   Moonset 3:13 AM

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PZZ455 Cape Mendocino To Pt Arena Out 10 Nm- 243 Am Pdt Mon May 20 2024
.gale warning in effect through this evening - .
Today - NW winds 20 to 30 kt. Gusts up to 40 kt. Waves N 12 ft at 10 seconds - .and sw 3 ft at 17 seconds. Tonight - NW winds 20 to 30 kt. Gusts up to 40 kt. Waves N 13 ft at 10 seconds - .and sw 2 ft at 16 seconds. Tue - NW winds 15 to 20 kt - .rising to 20 to 30 kt. Waves N 10 ft at 9 seconds - .and sw 2 ft at 16 seconds. Tue night - NW winds 15 to 25 kt. Waves N 9 ft at 9 seconds - .and S 2 ft at 15 seconds. Wed - N winds 15 to 25 kt. Waves N 8 ft at 7 seconds - .and sw 2 ft at 16 seconds. Thu - NW winds 15 to 25 kt. Waves N 8 ft at 7 seconds. Fri - NW winds 10 to 20 kt. Waves N 6 ft at 6 seconds.

PZZ400 243 Am Pdt Mon May 20 2024
Synopsis for northern california waters - A strong thermal trough will continue to produce gale force winds and very steep, hazardous seas through Tuesday morning across much of the coastal waters. Northerly winds slightly diminish into mid week as the surface pressure gradient gradually relaxes. However, gale force conditions are expected to persist across the southern outer waters through Tuesday evening. Conditions slowly improve mid to late week, but will remain hazardous for small craft.

FXUS66 KEKA 201106 AFDEKA

AREA FORECAST DISCUSSION National Weather Service Eureka CA 406 AM PDT Mon May 20 2024

SYNOPSIS
Slightly below normal temperatures expected through the week amidst a series of upper shortwaves and associated weak fronts.
Strong coastal pressure gradient will reinforce gusty NW winds through Tuesday. Weaker winds and moisture advection may allow coastal stratus to redevelop in the second half of the week before potential for a more unsettled pattern into next weekend.

DISCUSSION
Temperatures are quickly cooling this morning beneath clear skies as an upper trough settles over the PNW - a frost advisory is currently in effect for isolated portions of interior Humboldt and western Trinity counties amidst a dry and well-mixed BL. Although advisory criteria is limited, temperatures near or <40 degrees are becoming more widespread from interior Del Norte to northern Mendocino counties.

A strong pressure gradient between the terrestrial thermal trough and offshore high pressure will continue to produce gusty northerly winds for the start to this week. Gusts 20 to 30 mph are still apparent on the northern Del Norte coast following advisory winds yesterday afternoon. Winds expected to ramp up again across the CWA late this morning as the coastal jet pushes onshore - HRRR indicates >75% probabilities for gusts exceeding 40 mph, especially along the coastlines of Humboldt, Del Norte and Mendocino counties as well as exposed headlands along Cape Mendocino. Interior ridges also likely to exceed 20 mph.

Mid to high level cloud cover will accompany a series of weak troughs progressing through the region beginning late Tuesday.
Cooling aloft alongside strong winds should keep coastal stratus to a minimum through Tuesday, after which the wind field is likely to shift into the southern waters and further offshore. More persistent WNW flow is forecast by mid-week, enhancing BL moisture and allowing for potential redevelopment of the marine inversion as a transient ridge builds into the coast. Long range models indicate a more progressive troughing pattern expected for late this weekend into next weekend.

AVIATION
Weakening marine layer and strong northerly winds will contribute to VFR conditions at the coastal terminals today, although scattered stratus may develop around ACV prior to sunrise while winds are calm. Hi-res models indicate high probability for CEC and ACV to see gusts exceeding 40 mph this afternoon as the coastal jet pushes onshore. NW flow expected to produce gusts exceeding 20 mph in UKI afternoon with daytime heating. Winds forecast to diminish and shift offshore Monday night into Tuesday as the coastal pressure gradient slackens, allowing potential for more marine stratus to develop.



MARINE
A thermal trough along the coast continues to produce a strong pressure gradient that will persist through Monday evening. As a result, northerly gales are expected in all zones through Monday, producing hazardous 10-12 foot short period waves across all zones. Steep and dangerous seas will continue into early next week as gales persist. Significant wave heights to 15 feet at 10-11 seconds are expected. Current model guidance indicates the strongest winds and wave response shifting to the southern waters by Tuesday. Gales are expected to finally cease by mid week as the coastal pressure gradient weakens, but a small craft advisory may be warranted for the middle to end of the week.

EKA WATCHES/WARNINGS/ADVISORIES
CA...
Frost Advisory until 9 AM PDT this morning for CAZ106-108.

NORTHWEST CALIFORNIA COASTAL WATERS...
Gale Warning until 9 PM PDT this evening for PZZ450-455.

Gale Warning until 4 AM PDT Tuesday for PZZ470.

Gale Warning until 10 AM PDT Tuesday for PZZ475.

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Albion
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Mon -- 04:14 AM PDT     0.27 feet Low Tide
Mon -- 04:15 AM PDT     Moonset
Mon -- 05:57 AM PDT     Sunrise
Mon -- 10:37 AM PDT     3.85 feet High Tide
Mon -- 03:39 PM PDT     2.01 feet Low Tide
Mon -- 05:57 PM PDT     Moonrise
Mon -- 08:26 PM PDT     Sunset
Mon -- 09:51 PM PDT     5.54 feet High Tide
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Albion, California, Tide feet

Mendocino
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Mon -- 04:12 AM PDT     0.27 feet Low Tide
Mon -- 04:15 AM PDT     Moonset
Mon -- 05:57 AM PDT     Sunrise
Mon -- 10:30 AM PDT     3.85 feet High Tide
Mon -- 03:37 PM PDT     2.01 feet Low Tide
Mon -- 05:57 PM PDT     Moonrise
Mon -- 08:27 PM PDT     Sunset
Mon -- 09:44 PM PDT     5.54 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION

Mendocino, Mendocino Bay, California, Tide feet

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