Sunrise 5:45 AM   Sunset 8:44 PM Moonrise 2:13 AM   Moonset 3:44 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 247 Am Pdt Sun Jun 2 2024
Synopsis for northern california waters - Northerly winds and seas will ease south of cape mendocino on Sunday. Southerlies are expected to develop north of cape mendocino Sunday as well. A late season swell around 12 feet at 14 seconds swell will arrive on Wednesday.

FXUS66 KEKA 012205 AFDEKA

AREA FORECAST DISCUSSION National Weather Service Eureka CA 305 PM PDT Sat Jun 1 2024

SYNOPSIS
A very late season atmospheric river will bring light rain to the North Coast Sunday afternoon through Monday morning.
Heat will quickly build back in by mid next week with interior highs over 100 degrees.

DISCUSSION
Largely seasonable weather has persisted today under the influence of weakening high pressure. Skies have been mostly clear allowing the interior to warm into the 80s. Meanwhile a gentle sea breeze has kept the coast cool mostly below 60. All that said, high clouds are apparent on satellite spreading across the area, the first sign of an approaching upper level trough.

More high clouds and moisture will continue to stream into the area tomorrow as a late season atmospheric river travels south down along the coast. This stream of moisture will bring light rain all along the coast tomorrow afternoon through Monday morning. Rain will be strongest in the terrain of Del Norte where south facing slopes will bear the highest rain rates. Most likely rainfall over the 24 hour period ranges from 0.7 to 1.7 inches along the highest terrain. Even Around Humboldt Bay, 0.2 to 0.5 inches is most likely. More minor wetting rain of 0.1 to 0.2 inches is most likely in Trinity and along the Mendocino coast through early Monday afternoon with only trace amounts for the more southern interior. Despite the time of year, the system has a very winter time profile with very little surface instability, so any thunderstorms even over high terrain is very unlikely (< 5% chance). ECMWF EFI highlights how unusual such rain is for June, even for Del Norte County where it is highlighted above the 90th percentile for climatology. That said, impacts will generally be minor with debris on roadways and slipperiness from oil buildup will be the main concerns.

Rain and clouds will help cool interior temperatures into the 70s for Monday, but such cool conditions will be very short lived. There is very high confidence that high pressure will rapidly build across northern California mid next week, brining the hottest temperatures of the year so far. For the valleys of Mendocino and especially Lake Counties, NBM is already showing a 60 to 80% chance of highs above 100 next Wednesday and Thursday. Though not quite record breaking, such conditions will bring the first high heat risk of the year, especially across Lake County where influence from the central valley could help keep even overnight temperatures as high as 70.
/JHW



AVIATION
18Z TAF ACV/CEC...VFR conditions prevail this afternoon with dissolved stratus. A weak shortwave trough will move through tonight to increase low clouds and some coastal drizzle. Ceilings will generally lower tonight to MVFR levels. CEC will have the best shot of light drizzle, and these conditions would lead to lower VIS and perhaps dips into LIFR (25%) earlier. A deepening marine layer should lead to higher CIGS. Rainfall chances will increase throughout the day Sunday as a late season Pacific low pressure system nears the region.

UKI....Firmly VFR with NW wind gusts to ease this evening. A jet of NW winds aloft of up to 35 kts will create low level wind shear through 10Z Sunday. 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
Northerly winds and seas have eased in the northern waters, and are also quickly subsiding in the souther zones. On Sunday, seas will drop range from 3 to 5 feet with the arrival of a small, period NW swell at around 3-4 ft at 10 seconds. Winds will be light, up to 12 kts and split in flow. Southerly winds will increase Sunday night through Monday morning ahead of a trough.

On Monday, a slightly larger, mid period NW swell will move in, building to around 8 ft at 10 seconds early Tuesday morning. Light, split wind flow will transition to light northerly winds Monday.
These winds will slowly increase in the southerly zones, initially south of the cape.

Tuesday, the NW swell will hold in size, then slowly lowering late in the day. A larger reinforcing swell then move in. Northerly winds in the southern waters will further increase, exceeding 22 kts south of the cape in the afternoon.

On Wednesday, a seasonably large, longer period WNW swell (300 degrees) will build in, currently forecast up to around 12 ft at 14 seconds. Northerly winds will be on the increase throughout the day, with gale conditions probable by late Wednesday. /JJW



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 11 PM PDT this evening for PZZ455-475.

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Humboldt Bay Entrance
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Sun -- 03:13 AM PDT     Moonrise
Sun -- 03:30 AM PDT     0.84 feet Low Tide
Sun -- 05:47 AM PDT     Sunrise
Sun -- 09:19 AM PDT     4.43 feet High Tide
Sun -- 02:59 PM PDT     1.67 feet Low Tide
Sun -- 04:43 PM PDT     Moonset
Sun -- 08:43 PM PDT     Sunset
Sun -- 09:17 PM PDT     6.99 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION

Humboldt Bay Entrance, California, Tide feet

Hookton Slough
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Sun -- 03:13 AM PDT     Moonrise
Sun -- 03:48 AM PDT     0.84 feet Low Tide
Sun -- 05:47 AM PDT     Sunrise
Sun -- 09:43 AM PDT     4.93 feet High Tide
Sun -- 03:17 PM PDT     1.67 feet Low Tide
Sun -- 04:43 PM PDT     Moonset
Sun -- 08:43 PM PDT     Sunset
Sun -- 09:41 PM PDT     7.49 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION

Hookton Slough, Humboldt Bay, California, Tide feet

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