Sunrise 6:09 AM   Sunset 8:17 PM Moonrise 2:57 AM   Moonset 2:13 PM

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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 854 Pm Pdt Fri May 3 2024
Synopsis for northern california waters - Southerly winds quickly strengthen over the next few hours as a front approaches the coast. Winds then rapidly shift to westerly after the frontal passage early Saturday morning. Gusty and sudden westerly wind gusts to 25 kt are possible on Saturday with convective showers.

FXUS66 KEKA 032157 AFDEKA

AREA FORECAST DISCUSSION National Weather Service Eureka CA 257 PM PDT Fri May 3 2024

SYNOPSIS
A cold front will move across the area this evening through early Saturday morning bringing a period of heavy rain.
Brief heavy wet snow is also expected above 2500 feet early Saturday morning. Colder air will settle over the area for Sunday and persist through the middle of next week bringing near freezing and freezing temperatures expected for the interior valleys during early morning hours.

DISCUSSION
Satellite shows the unseasonably strong cold front off the coast this afternoon. Rain is expected to start in Crescent City between 3 and 4 pm and move south with it expected to make it to Eureka around 7 pm or so. Moderate to heavy rain is expected with this front with widespread 1 to 3 inches across the area. The mounts of Humboldt and Del Norte counties show up to 4 inches while the valleys of southern Lake and eastern Trinity counties may only see around a half inch. Snow levels are expected to fall rapidly as this front moves in and are expected to be around 2,500 to 3,500 feet by Saturday morning. The lowest levels are expected to be in Humboldt and Del Norte counties. This will likely bring several inches of snow above the snow level. With the warm ground temperatures and high sun angle this is expected to melt fairly quickly on Saturday. The winter weather advisory remains on track. Saturday afternoon showers and possibly thunderstorms are expected. There is a lot of cold air aloft with 500 mb temperatures dropping to -32. This has the potential for some instability to develop if skies clear, but this is uncertain.
There is still around a 15 percent chance for thunder.

Saturday night the precip comes to an end and it has the potential to be a cold night. The temperatures at 850MB are only around -3C.
This could bring freezing temperatures as low as 2,000 feet even if skies remain cloudy and there isn't any radiational cooling.
Any valleys that do clear out could see temperatures drop below freezing. Sunday afternoon temperatures will remain well below seasonal normals with highs likely remaining in the 50s in the most areas. A freeze watch may be needed in Trinity, but there is currently a winter weather advisory in place in many of the areas that will potentially see freezing temperatures so have held off.

Sunday night and Monday a short wave and associated cold front is expected to bring more light rain and additional clouds, especially in the north. Rainfall amounts have increased with this system in Del Norte county amounts are now close to a half inch.
This will likely leave lingering moisture that develops into low clouds or fog in the north. This is expected to keep the northern the northern areas from getting as cold, although Mendocino and Lake counties could see freezing temperatures. Tuesday and Wednesday will likely see more clearing skies allow more radiational cooling, however warm advection will be warming temperatures aloft each day. Frost or freezing temperatures are possible both nights, although there is still uncertainty on the locations. Thursday and Friday the models show high pressure building back into the area with Ukiah, Lakeport, and surrounding areas getting back into the 80s. Friday Lakeport has a 35 percent chance of exceeding 85 degrees. MKK

AVIATION
A brief period of IFR level stratus moved over ACV this morning. Otherwise, prevailing cloud/visibilities into mid- afternoon have been VFR low-mid Cigs. Prefrontal conditions are forecasted to slowly dip down to MVFR, then IFR this evening. The cold front will arrive this evening preceded and accompanied by periods of moderate to heavy rain...which will definitely impact ACV and CEC's flight operations. Just ahead of the front, there is a minimal threat of LLWS at CEC, but the main concern will be increased surface wind gusts this evening along the coast. Rain should taper Saturday morning and become more shower; Cig/Vis will be on the rise also. Note: Flight hazard: snow could impact air operations across the interior higher terrain. /TAA

MARINE
Winds will continue to become southerly and increase ahead of an approaching frontal passage. Gusts 15-20KT will develop first in the northern waters along the frontal boundary late this evening into early Saturday morning, quickly turning W/NW behind the front. Gusty NW winds will become confined to the southern waters amidst scattered convective showers Saturday evening. Steep wind wave response expected late Saturday through Sunday as lingering showers dissipate. Combined seas are forecast to be 6-7 feet with 7-9 second periods through the weekend before a long period NW swell fills in early next week. Strong northerlies combined with another steep NW swell mid week may produce combined seas exceeding 10 feet.

EKA WATCHES/WARNINGS/ADVISORIES
CA...
Winter Weather Advisory from 4 AM to 11 AM PDT Saturday for CAZ102-105>108-111.

NORTHWEST CALIFORNIA COASTAL WATERS...
Small Craft Advisory from 9 PM this evening to 3 AM PDT Saturday for PZZ450.

Small Craft Advisory from 9 PM this evening to 9 AM PDT Saturday for PZZ470.

Small Craft Advisory from 3 AM to 9 PM PDT Saturday for PZZ475.

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Bucksport
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Fri -- 02:36 AM PDT     2.84 feet Low Tide
Fri -- 03:57 AM PDT     Moonrise
Fri -- 06:11 AM PDT     Sunrise
Fri -- 08:25 AM PDT     5.99 feet High Tide
Fri -- 02:55 PM PDT     0.33 feet Low Tide
Fri -- 03:13 PM PDT     Moonset
Fri -- 08:15 PM PDT     Sunset
Fri -- 09:48 PM PDT     6.63 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION

Bucksport, Humboldt Bay, California, Tide feet

Mad River Slough, Arcata Bay, Humboldt Bay, California, Tide feet

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