Sunrise 6:19 AM   Sunset 8:01 PM Moonrise 9:20 PM   Moonset 6:04 AM

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PZZ455 Cape Mendocino To Pt Arena Out 10 Nm- 845 Pm Pdt Thu Apr 25 2024
.small craft advisory in effect from Friday evening through Saturday morning - .
Tonight - W winds 5 to 10 kt. Waves W 3 ft at 9 seconds - .and S 2 ft at 15 seconds. Chance of rain. Fri - NW winds 10 to 20 kt. Waves nw 6 ft at 9 seconds - .and S 2 ft at 15 seconds. Chance of showers. Fri night - NW winds 15 to 20 kt. Gusts up to 30 kt. Waves nw 7 ft at 5 seconds. Sat - NW winds 10 to 15 kt. Waves nw 7 ft at 5 seconds - .and nw 2 ft at 15 seconds. Sat night - NW winds 5 to 10 kt. Waves nw 5 ft at 8 seconds - .and nw 3 ft at 13 seconds. Sun - NW winds 10 to 20 kt. Waves nw 8 ft at 6 seconds. Mon - NW winds 15 to 25 kt. Waves N 8 ft at 7 seconds. Tue - NW winds 15 to 20 kt. Waves N 9 ft at 7 seconds.

PZZ400 845 Pm Pdt Thu Apr 25 2024
Synopsis for northern california waters - After a brief surge of southerly winds along a frontal boundary, breezy northwesterly winds will return to the waters overnight and into Friday and persist through Sunday, especially in the southern waters. Another weak front is expected to move through along with a small, nw swell at 14 to 15 seconds.

FXUS66 KEKA 252155 AFDEKA

AREA FORECAST DISCUSSION National Weather Service Eureka CA 238 PM PDT Thu Apr 25 2024

SYNOPSIS
Periods of light to moderate rain are forecast tonight through Friday. Drier and cooler conditions are expected for the weekend except for a slight chance of light rain north of Cape Mendocino Saturday afternoon and evening.

DISCUSSION
Upper trough offshore/over the Pac NW is forecast to dig southeastward tonight and then into northern Great Basin on Friday. This will leave NW California in a moist northwesterly onshore/upslope flow with PWAT anomalies about 125-150% of normal.
Greatest precip amounts (1-2 inches) are forecast to occur across interior Del Norte over 2 days (today- Friday). Much less is expected for Mendocino, Lake and eastern Trinity where only a few hundredths or nothing is forecast. Light snow is also expected for elevations above 5500-6000 feet with around 1-4 inches for the highest peaks today through Friday. Overall, not a major precip maker by any means, but certainly enough to put a damper on outdoor activities. The trough will also induce stronger NW winds, mainly across Lake and perhaps eastern Trinity/eastern Mendocino this evening and again on Friday. W-NW wind gusts to 30 to 40 mph for the wind-prone exposed ridges are highly probable (>60% chance).

Subfreezing temperatures are highly probable (80% chance) for the mountains above 3500-4000 feet Friday night and Saturday morning.
Probabilities for valleys to freeze are much less certain with only a 30-40% chance for the typical cold valleys in Trinity; Ruth, Hayfork, Mad River, Coffee Creek & Carrville. Dinsmore right along the Trinity/Humboldt border my get close to 32F too.
Fog and low clouds will form in the valleys and hinder the longwave cooling. Some interior valleys in Mendo, Del Norte, Lake and Humboldt are forecast to dip down to the mid 30's, so it will start off chilly (for late April) on Saturday.

Otherwise, broad and flat ridging is forecast to build offshore as another shortwave trough progresses into the Pac NW over the weekend into early next week. This low-amplitude westerly flow will most likely keep temperatures on the mild side and slightly below or near seasonal normals through early next week.

Mid to late week (Wed and Thu) considerable uncertainty grows regarding precip chances (timing and amounts) as another trough drops down from the NW. Once again, highest precip chances will be north of Cape Mendocino with the lowest south. Temperatures will most likely trend down after a brief warm up Mon and Tue. DB

AVIATION
Coastal Terminals: A weak frontal system is bringing light rain and showers to region today. Ceilings will continue to enter MVFR to TEMPO IFR levels this afternoon. Probability for more consistent IFR is highest from 1Z to 6Z. Dynamic ensemble based guidance takes it down to LIFR at ACV, but confidence is not high on that currently. The coastal southerly winds of 10 to 15 kts winds will subside this evening. Ceilings will lift some Friday morning, but probs for at least TEMPO MVFR conditions will remain through this TAF period.

UKI: Winds are from a more northerly direction and producing OCNL gusts. The weak front will produce VCSH to -SHRA into the valley to lower CIGS to MVFR level tonight, with heights possibly nearing IFR into early Friday morning. Lifting and a transition towards VFR is expected towards the end of the TAF period. /JJW

MARINE
Southerly winds up to 15 kt will progress through the waters this evening with the passage of a weak front. Light, westerly winds behind the front will shift northerly and increase Friday, mainly in the southern waters where Small Craft Advisory level winds and seas are expected. Otherwise, the ongoing WNW swell at 10 - 11 seconds will gradually ease below 10 seconds with wave heights around 6 - 8 feet through Saturday. A longer period WNW swell will arrive Saturday morning around 14 seconds with smaller wave heights around 2 - 3 feet. Monday evening looks to have near Gale gusts south of Cape Mendocino which will last through Tuesday evening. EYS/JJW

EKA WATCHES/WARNINGS/ADVISORIES
CA...
None.
NORTHWEST CALIFORNIA COASTAL WATERS...
Small Craft Advisory from 3 AM Saturday to midnight PDT Saturday night for PZZ455-475.

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Mendocino
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Thu -- 06:23 AM PDT     Sunrise
Thu -- 06:47 AM PDT     -0.53 feet Low Tide
Thu -- 07:04 AM PDT     Moonset
Thu -- 01:38 PM PDT     4.10 feet High Tide
Thu -- 06:23 PM PDT     2.60 feet Low Tide
Thu -- 08:03 PM PDT     Sunset
Thu -- 10:19 PM PDT     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION

Mendocino, Mendocino Bay, California, Tide feet

Point Cabrillo
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Thu -- 12:34 AM PDT     -0.00 knots Slack
Thu -- 03:59 AM PDT     -1.37 knots Max Ebb
Thu -- 06:23 AM PDT     Sunrise
Thu -- 07:04 AM PDT     Moonset
Thu -- 07:44 AM PDT     0.00 knots Slack
Thu -- 10:45 AM PDT     1.01 knots Max Flood
Thu -- 02:14 PM PDT     -0.00 knots Slack
Thu -- 04:29 PM PDT     -0.68 knots Max Ebb
Thu -- 07:22 PM PDT     0.00 knots Slack
Thu -- 08:03 PM PDT     Sunset
Thu -- 10:20 PM PDT     Moonrise
Thu -- 10:24 PM PDT     0.69 knots Max Flood
Tide / Current data from XTide NOT FOR NAVIGATION

Point Cabrillo, California Current, knots

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