Sunrise 5:45 AM   Sunset 8:43 PM Moonrise 1:49 AM   Moonset 2:29 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 836 Pm Pdt Fri May 31 2024
Synopsis for northern california waters - Very steep waves over the outer waters are forecast to subside tonight as northerly winds steadily diminish. Northerly winds and seas will remain elevated south of cape mendocino on Saturday and then ease on Sunday. Lighter winds and lower seas are expected north of cape mendocino over the weekend.

FXUS66 KEKA 312230 AFDEKA

AREA FORECAST DISCUSSION National Weather Service Eureka CA 330 PM PDT Fri May 31 2024

SYNOPSIS
Conditions in the northern areas are expected to deteriorate this weekend before a short spurt of wetting rainfalls arrives Sunday night into Monday. Southern areas will cool off but are not expected to experience any meaningful precipitation at this time. Next week, temperatures will soar to well above average from the interior to the coast, possibly reaching over 100F in some places.



DISCUSSION
Northwest California remains under high pressure with mostly clear skies this afternoon. Winds have been less gusty along the coast today as a trough begins to approach the area. A last push of gusty northwest winds in Mendocino and Lake counties will occur on Saturday as the tightest pressure gradient shifts south over those counties bringing gusts to around 30 mph or locally higher on some ridge tops Saturday afternoon and evening.

The next main story is the approach of a strong trough Sunday into Monday. The ensembles are indicating precipitable moisture will approach levels at the upper end of what occurs this time of year, several standard deviations above normal, with IVT nearly 90% likely to exceed 500 kg/ms2. Though the target of this moisture is primarily in Oregon, the front will sag into northwest California bringing plenty of moisture to Del Norte and Humboldt counties. Probabilities are nearly 100% of a tenth of an inch or more Sunday night into Monday morning in those two counties but the bigger point of emphasis is that an inch or more in the mountains of Del Norte and northern Humboldt counties is starting to look more likely than just possible. Overall this should only be a beneficial rain but rain rates will need to be further investigated for any risk to the burn scars in Del Norte.

Rain chances will quickly decrease farther south and east into Trinity and Mendocino counties where by the farther south portions of Mendocino and Lake counties may see no rain at all. The front will move through the entire region by Monday evening.

Quickly behind this front ridging will build back over the west coast allowing temperatures to rebound quickly into the 90s and even to near or exceeding 100 degrees in Lake County on Wednesday and/or Thursday. With the expanding heat there will also be increasing heat risk in the far southeastern portion of the area, particularly near Clearlake. In coordination with the weather office in Sacramento, we went ahead and issued an excessive heat watch from Tuesday through Thursday to highlight this risk. At this time it's more likely that only heat advisories will be needed but it isn't impossible that warning thresholds could be reached when the heat peaks mid week. /RPA

AVIATION
ACV/CEC...VFR then MVFR to IFR overnight. Afternoon conditions are solidly VFR under dry, northerly flow and a well mixed boundary layer. Northerly winds will be gusty through the afternoon at CEC, and there will continue to be lesser gusts at ACV. Moisture will increase with a weak shortwave trough moving through tonight. This will aid in stratus formation along Humboldt Bay and likely transported to CEC through a southerly wind eddy. The shortwave will deepen the marine layer with predominant MVFR ceilings, and movement into IFR. There is a low probability (10 to 20% for LIFR), but the setup does not favor ceilings that low. Light drizzle may also develop around Humboldt Bay, and this could lower VIS to IFR levels as well.

UKI....Firmly VFR with occasional NW wind gusts through the afternoon. Stratus will build in from the west into the high terrain with deepening from a weak shortwave trough, but soundings indicate the depth will not be enough to near the valley. /JJW

MARINE
Gale force gusts will continue over the outer waters through late tonight. Locally gusts up to around 40 kts can be expected near Pt St George and downwind Cape Mendocino into this evening before beginning to ease. Steep waves around 10 to 13 feet are expected to gradually subside today through Saturday, with Hazardous Seas conditions lingering in the southern outer zone 475 through Saturday morning.

For the weekend an upper level trough is expected to weaken the winds by Saturday. Sunday a northwest swell around 10 seconds will be the main wave. Initially it is expected to be around 3 feet, but will build to around 6 feet at 10 seconds by Tuesday.

Sunday night or early Monday these winds are expected to switch back to northerly once again. Monday and Tuesday it looks like the northerly winds will increase some, but not get all that strong. Mid to late in the week high pressure builds back in and northerly winds will increase once again.



EKA WATCHES/WARNINGS/ADVISORIES
CA...
Excessive Heat Watch from Tuesday morning through Thursday evening for CAZ114-115.

NORTHWEST CALIFORNIA COASTAL WATERS...
Small Craft Advisory until 9 AM PDT Saturday for PZZ450.

Small Craft Advisory until 3 AM PDT Sunday for PZZ455.

Gale Warning until 10 PM PDT this evening for PZZ470-475.

Hazardous Seas Warning from 10 PM this evening to 6 AM PDT Saturday for PZZ475.

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Humboldt Bay Entrance
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Sat -- 02:26 AM PDT     1.86 feet Low Tide
Sat -- 02:49 AM PDT     Moonrise
Sat -- 05:47 AM PDT     Sunrise
Sat -- 07:55 AM PDT     4.51 feet High Tide
Sat -- 02:07 PM PDT     1.08 feet Low Tide
Sat -- 03:29 PM PDT     Moonset
Sat -- 08:36 PM PDT     6.55 feet High Tide
Sat -- 08:42 PM PDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION

Humboldt Bay Entrance, California, Tide feet

Hookton Slough
Click for Map
Sat -- 02:44 AM PDT     1.86 feet Low Tide
Sat -- 02:49 AM PDT     Moonrise
Sat -- 05:47 AM PDT     Sunrise
Sat -- 08:19 AM PDT     5.01 feet High Tide
Sat -- 02:25 PM PDT     1.08 feet Low Tide
Sat -- 03:29 PM PDT     Moonset
Sat -- 08:42 PM PDT     Sunset
Sat -- 09:00 PM PDT     7.05 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION

Hookton Slough, Humboldt Bay, California, Tide feet

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