Sunrise 6:32 AM   Sunset 7:59 PM Moonrise 12:02 PM   Moonset 2:39 AM

  Print   HELP   Reset   Save   Recall

PZZ450 Pt St George To Cape Mendocino Out 10 Nm- 243 Am Pdt Tue Apr 16 2024
.small craft advisory in effect through this afternoon - ..hazardous seas warning in effect from this afternoon through late tonight - .
Today - N winds 15 to 25 kt. Waves N 9 ft at 9 seconds - .and nw 3 ft at 12 seconds. Tonight - N winds 15 to 25 kt with gusts to around 35 kt. Waves N 11 ft at 9 seconds - .and nw 3 ft at 12 seconds. Wed - N winds 10 to 20 kt. Waves N 10 ft at 9 seconds - .and nw 2 ft at 11 seconds. Wed night - N winds 10 to 20 kt. Waves N 9 ft at 8 seconds. Thu - N winds 5 to 15 kt. Waves nw 5 ft at 8 seconds - .and sw 2 ft at 16 seconds. Fri - NW winds 5 to 10 kt. Waves nw 3 ft at 7 seconds - .and S 2 ft at 15 seconds. Sat - N winds 10 to 15 kt. Waves nw 4 ft at 6 seconds - .and W 3 ft at 13 seconds.

PZZ400 243 Am Pdt Tue Apr 16 2024
Synopsis for northern california waters - Northerly winds are forecast to continue to strengthen tonight mainly over the outer zones. Gale force gusts are also highly probable in the lee of cape mendocino and around pt st george each afternoon and evening through Wednesday. Steep northerly waves will steadily build, peaking at 12 to 14 ft in the outer waters today and Wed before winds and seas decline late in the week.

FXUS66 KEKA 152142 AFDEKA

AREA FORECAST DISCUSSION National Weather Service Eureka CA 242 PM PDT Mon Apr 15 2024

SYNOPSIS
Gusty northerly winds are forecast through mid-week as high pressure builds into Northwest California. Increasing temperatures beneath the clearing skies will allow interior valleys to reach into the upper 70s to possibly lower 80s by the middle to end of the week. Marine stratus is forecast to return by the latter half of the week as northerly winds subside.



DISCUSSION
An inverted ridge of high pressure will continue to build into Northwest California as an upper cutoff low continues its trek east. Low stratus and scattered high cirrus from this morning continue to clear. Northerly winds will continue to increase along the tightening pressure gradient between the building ridge and departing low. Gusts 25 to 30 mph are likely this afternoon along exposed headlands and coastlines from Crescent City down to Point Arena. Gusts to 35 mph have already been recorded on Cape Mendocino at the Mattole Road PG&E weather station.

Warm air advection ahead of the building Pacific High promises a return to summer-like conditions for the start of this week.
Temperatures are expected to steadily climb beneath mostly clear skies, with highs likely to reach into the mid 70s in interior valleys by Wednesday. Nightly offshore flow will also help to dry out the interior as RH values decrease. Meanwhile, a recurring pattern of strong northerlies will remain prevalent offshore through midweek - this should prevent marine stratus from completely inundating the coastline and encourage diurnal heating.
NBM indicates a high probability of coastal temperatures reaching 60 degrees by Wednesday afternoon.

As northerlies subside and shift to a westerly onshore flow late this week, the marine layer will likely be able to deepen and spread further inland beneath broad high pressure subsidence. This will, in turn, dampen daytime warming for areas closer to the coast. Model soundings and long-range deterministic models indicate strong low to mid level warming and drying Thursday and Friday. Interior RH values are forecast to decrease below 50%. Most interior valleys are expected to have temperatures in the mid to upper 70s. NBM indicates a high chance for temperatures above 80 for many interior valleys of southern Mendocino and Lake counties. The warmest valleys of interior Humboldt, Trinity, and northern Mendocino counties have a slightly lower chance of temperatures above 80. However, temperatures will most likely remain in the low 80s for these areas.

Long range model clusters begin to show the Pacific ridge eroding into more of a zonal flow by this coming weekend. Currently, no major storm systems are forecast for the next 7-10 days.



AVIATION
18Z TAF period: Coastal stratus has eroded this afternoon. A strengthening low level inversion and wind-driven terrain influence is holding stratus in some interior locations.
Northerlies are breezy to gusty this afternoon. Overnight weakness in northerly winds and a small Humboldt Bay wind eddy may allow for stratus advection northward into ACV (40 to 50%). Soundings resolve this ceiling to be around 1000 ft AGL with a small chance for a slightly lower level into IFR (20%). The eddy will not have influence into CEC where northerlies will remain more resilient.
Northerlies will increase again Tuesday afternoon. UKI will remain VFR with lighter winds and the occasional gust. Steep wind-driven seas are on the increase, and will peak 12 to 14 feet Tuesday through Wednesday. JJW



MARINE
Northerlies are strengthening this afternoon across the waters. Gale strength winds will develop this evening, and will spread south into Tuesday morning. The primary focus will be in the outer zones. Expansion fans south of Cape Mendocino and Point Saint George will bring areas of gale (<50% coverage) into the inners, mainly into the afternoons and evenings through Wednesday. Ensemble guidance model an at least partial collapse of the expansive ridge of high pressure contributing to the northerlies late this week.
JJW



EKA WATCHES/WARNINGS/ADVISORIES
CA...
None.
NORTHWEST CALIFORNIA COASTAL WATERS...
Small Craft Advisory until 9 AM PDT Wednesday for PZZ450- 455.

Small Craft Advisory until 9 PM PDT this evening for PZZ470.

Gale Warning from 9 PM this evening to 5 PM PDT Wednesday for PZZ470.

Small Craft Advisory until 9 AM PDT Tuesday for PZZ475.

Gale Warning from 9 AM Tuesday to 5 PM PDT Wednesday for PZZ475.

toggle option: (graph/table)

Trinidad Harbor
Click for Map
Tue -- 12:40 AM PDT     3.48 feet Low Tide
Tue -- 03:38 AM PDT     Moonset
Tue -- 06:11 AM PDT     5.20 feet High Tide
Tue -- 06:34 AM PDT     Sunrise
Tue -- 01:00 PM PDT     Moonrise
Tue -- 01:37 PM PDT     0.39 feet Low Tide
Tue -- 07:58 PM PDT     Sunset
Tue -- 08:48 PM PDT     4.86 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION

Trinidad Harbor, California, Tide feet

Arcata Wharf
Click for Map
Tue -- 01:28 AM PDT     3.93 feet Low Tide
Tue -- 03:37 AM PDT     Moonset
Tue -- 06:34 AM PDT     Sunrise
Tue -- 07:09 AM PDT     5.96 feet High Tide
Tue -- 01:01 PM PDT     Moonrise
Tue -- 02:38 PM PDT     0.69 feet Low Tide
Tue -- 07:57 PM PDT     Sunset
Tue -- 09:51 PM PDT     5.39 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION

Arcata Wharf, Humboldt Bay, California, Tide feet

Full Color Weather Map

Link to Loop


Other links: GEOS-West     Contential US     Full GOES-East

Eureka, CA,