Sunrise 6:14 AM   Sunset 8:12 PM Moonrise 12:33 AM   Moonset 9:15 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 252 Am Pdt Mon Apr 29 2024
Synopsis for northern california waters - Northerly winds will continue to strenthen through Wednesday. These winds will be focused in the southern waters today, but will expand north Tuesday. Gale conditions will be possible, mainly in the southern zones Tuesday through Wednesday. Mid period nw swells up to 10 feet will mix with short period seas through Wednesday.

FXUS66 KEKA 291238 AFDEKA

AREA FORECAST DISCUSSION National Weather Service Eureka CA 538 AM PDT Mon Apr 29 2024

SYNOPSIS
Stratus and low cloud cover will continue to clear out through the morning. Mild pleasant weather is expected today with colder temperatures expected overnight into Tuesday. Offshore flow and high pressure will promote warming and drying for the interior, late in the week.



DISCUSSION
Low clouds and stratus have already begun to dissipate as drier air aloft is being infused into the area via high pressure, bringing subsidence and pleasant weather by the late morning. Skies are likely to clear as subsidence influences the region. A week inversion can be observed on model soundings, further encouraging mild and pleasant weather as winds mix down. The previously mentioned Pacific high will continue the ridging pattern locally with a meridional flow as it interacts with a mid level trough, to the north of our CWA A steep pressure gradient, with perpendicular alignment to the coast, will accelerate northerly winds in this meridional flow pattern bringing gusty winds to bear on the Mendocino coast and the interior. Anomalously high winds are being signaled by the ensembles and EFI, for coastal areas south of Point Arena and south towards the SF bay area.

Drier air aloft and clearing out of sky cover will allow more radiative cooling over the next few days. This will enhance the probability of frost this morning in Trinity and N Mendocino counties, for which an FR.Y has been issued. These conditions will continue dropping temperatures towards freezing late tonight into Tuesday morning and are expected to spread into the Humboldt and Del Norte interiors. A Freeze Watch has been issued to cover these conditions as NBM indicates a probability of 50-75% for temperatures falling <32 degrees Tuesday morning.

Late Tuesday into Wednesday, gusty northerly winds are expected as the pressure gradient tightens considerably along the coast.
Clearing skies and increasing offshore flow early Wednesday will promote widespread warming and drying across the region, especially in the interior. RH values currently forecast to drop to 30% in interior Mendocino, Trinity and Lake Counties. Models are still without consensus on high valley temperatures Thursday and Friday - right now NBM only has >50% probabilities in southern Mendocino and Lake counties. Regardless, an overall warming trend is expected with highs in the 70's. /JM /EYS


Aviation
An upper level trough is bringing a few showers to the area this morning, however VFR conditions are in place at the TAF sites. These may briefly lower conditions this morning. Some low clouds are in place in many of the valleys of Humboldt and Del Norte counties. Later this morning and into the afternoon as the trough moves out winds will become breezy, especially in Mendocino and Lake counties. This evening and tonight winds are expected to diminish, but this may be slower than usual. Tonight a few clouds are possible in the valleys of Humboldt county near the coast, but the taf sites and most other areas should remain fairly clear. MKK

Marine
Northerly winds have started to pick up in the southern waters, mainly near Point Arena and just downwind of Cape Mendocino.
Gusts close to 30 kt are occurring in some localized areas.
Elsewhere winds are only 5 to 15 kt. Wind driven waves have started to increase with 5 feet at 6 seconds being reported at the buoy off Point Arena. The northwest swell is currently around 6 feet at 12 seconds. The winds will increase some this afternoon, but mainly just south of Cape Mendocino. A small craft advisory has been issued to highlight that.

Tonight and Tuesday winds are expected to remain fairly similar to today. Tuesday night and Wednesday winds are expected to start increasing as high pressure finally starts to build into the eastern Pacific. Small craft advisories will likely be needed for the northern waters and gales are possible in the southern waters.
Thursday and Friday winds are expected to gradually diminish as another weather system approaches the area. The swell is expected to get reinforced on Tuesday peaking 8 feet at 12 seconds. This swell is expected slowly diminish through the week. MKK



EKA WATCHES/WARNINGS/ADVISORIES
CA...
Freeze Watch from late tonight through Tuesday morning for CAZ102-105>108.

Frost Advisory until 9 AM PDT this morning for CAZ107-108- 110-111.

NORTHWEST CALIFORNIA COASTAL WATERS...
Small Craft Advisory from 3 PM this afternoon to 3 AM PDT Thursday for PZZ455-475.

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