Sunrise 5:46 AM   Sunset 8:35 PM Moonrise 2:10 AM   Moonset 3:38 PM

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PZZ455 Cape Mendocino To Pt Arena Out 10 Nm- 259 Pm Pdt Sun Jun 2 2024
Tonight - W wind 5 kt, backing to S after midnight. Seas around 4 ft. Wave detail: nw 2 ft at 5 seconds and nw 4 ft at 10 seconds. A chance of with patchy dense fog. A chance of rain. Mon - W wind 5 to 10 kt. Seas 5 ft. Wave detail: W 1 foot at 4 seconds and nw 5 ft at 10 seconds. Rain likely. Mon night - N wind 10 to 15 kt. Seas 7 ft. Wave detail: nw 4 ft at 5 seconds and nw 6 ft at 10 seconds. Tue - NW wind 10 to 15 kt. Seas 8 ft. Wave detail: nw 5 ft at 5 seconds and nw 7 ft at 11 seconds. Tue night - N wind 15 to 20 kt. Seas 8 ft. Wave detail: nw 6 ft at 6 seconds and nw 7 ft at 10 seconds. Wed - NW wind 20 to 25 kt with gusts up to 35 kt. Seas 12 ft. Wave detail: N 9 ft at 8 seconds and nw 10 ft at 15 seconds. Wed night - NW wind 20 to 25 kt with gusts up to 35 kt. Seas around 13 ft. Wave detail: nw 10 ft at 9 seconds and nw 10 ft at 15 seconds. Thu - NW wind 15 to 20 kt. Seas 9 ft. Wave detail: N 9 ft at 9 seconds and nw 8 ft at 13 seconds. Thu night - NW wind 15 to 20 kt. Seas 8 ft. Wave detail: N 6 ft at 8 seconds and nw 6 ft at 12 seconds. Fri - NW wind 10 to 15 kt. Seas 7 ft. Wave detail: N 4 ft at 6 seconds and nw 5 ft at 12 seconds. Fri night - NW wind 5 to 10 kt. Seas 7 ft.

PZZ400 259 Pm Pdt Sun Jun 2 2024
Synopsis for northern california waters - Light, split wind flow will transition to increasing southerly winds, mainly in the northern zones tonight. A late season long period swell of 10 to 12 feet at 15 seconds swell will arrive early Wednesday while northerly winds increase. A chaotic sea state will result.

FXUS66 KEKA 022135 AFDEKA

AREA FORECAST DISCUSSION National Weather Service Eureka CA 235 PM PDT Sun Jun 2 2024

SYNOPSIS
Light to moderate rain will continue to spread south through early Monday morning with the heaviest rain restricted to the Del Norte and Humboldt coast. Hot, dry weather will rapidly build back in mid week with high heat risk for many interior valleys, especially Lake County, Wednesday and Thursday.



DISCUSSION
Midlevel clouds and moisture have continued to stream into the area today ahead of an upper level trough. This pattern has brought muggy conditions along the coast with dewpoints soaring into the upper 50s. Very light rain has already begun near Crescent City with light showers on radar. Rain will continue to strengthen and spread south through tomorrow morning.

Rain rates will be strongest in the terrain of Del Norte early monday morning. Though winds are westerly aloft, generally southerly winds will limit strong orographic enhancement to only the few south facing slopes and highest peaks above 3000 feet. Most likely rainfall over the 24 hour period ranges from 1.2 to 2.2 inches along the highest terrain. Even Around Humboldt Bay, 0.3 to 0.6 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 are 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 being 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.
Strong nighttime cooling and marine influence will generally limit the heat risk elsewhere though afternoon highs will still be oppressive in areas such as the Trinity River Valley and Round Valley. /JHW



AVIATION
18Z TAF ACV/CEC...Summary: Increasing rainfall this afternoon and deteriorating CIGs and VIS tonight with LLWS at CEC. Some improvement after 12Z Monday.

Light rain is spreading in from the north this afternoon. The shallower stratus cleared out late this morning, but improvement is proving to be short lived as rainfall rates steadily increase this evening. IFR to LIFR CIGS and VIS are expected to develop with moderate rainfall rates and TEMPO heavy rainfall rates. Gusty S winds at the surface and SW winds aloft 1500 to 2000 ft AGL at 30 kts will create low level wind shear (LLWS) through 12Z, especially at CEC. Rainfall rates will quickly lower after 12/13Z Monday behind a frontal passage, and improvements in CIGs and VIS will follow.

UKI....Rainfall from a late season storm system will generally fall mostly north of this southern terminal. Measurable precipitation in the form of drizzle or light showers will make it into the valley with the quickly moistening airmass. This will allow for low clouds to settle in with likely accompanying mist and lowered VIS. Held the category to MVFR levels for now in the TAF. /JJW



MARINE
Summary: A series of small mid period swells through Tuesday will be followed by a seasonably large and long period WNW swell on Wednesday. Northerly winds increase Tuesday in the southern zones, and will strengthen and expand north Wednesday. The short period N seas and long period WNW swell will create a chaotic seas state Wednesday.

Southerly winds are increasing in the northern waters today ahead of a late season frontal system. These winds will reach 15 to 20 kts overnight and into Monday morning. A southerly swell is coming in at 2-3 ft at 17 seconds today, along with a small, mid period NW swell at 3-4 ft.

On Monday, a slightly larger, mid period NW swell will move in, building to 6-8 ft at 11 seconds early Tuesday morning. Light, split wind flow will transition to strengthening northerlies in the southern zones Monday night.

Tuesday, the NW swell will hold in size, then a slightly larger reinforcing mid period swell then pulses in Tuesday afternoon with seas 6 to 8 ft. Northerly winds in the southern waters will further increase, reaching 22 kts south of the cape in the afternoon.

A strong gale on the southern periphery of a late season Aleutian low pressure area, driving eastward, will deliver a long period swell on Wednesday. A resulting seasonably large, long period WNW swell (300 degrees) will build in early Wednesday morning, currently forecast 10 to 12 ft at 15 seconds. Northerly winds will be on the increase throughout the day, with gale conditions probable in portions of the waters by late Wednesday. There looks to be some shelter from the strongest winds in the northern inner zones. The combination of steep, short period northerly seas and the long period swell will generate a confused sea state up to 15 ft

On Thursday, the long period swell will begin slowly easing in size.
The northerlies will offer more potential Gale gusts in portions of the waters in the wind favorable locations south of the capes, with some shelter in the inner zones. /JJW



EKA WATCHES/WARNINGS/ADVISORIES
CA...
Heat Advisory from 8 AM Wednesday to 8 PM PDT Thursday for CAZ114-115.

NORTHWEST CALIFORNIA COASTAL WATERS...
None.

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Albion
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