Marine Weather Net

Point St. George to Point Arena between 60 and 150 NM Offshore Forecast


TODAY

N
WINDS
15 - 25
KNOTS

TONIGHT

N
WINDS
10 - 20
KNOTS

SAT

N
WINDS
5 - 15
KNOTS

SAT NIGHT

NNW
WINDS  < 10
KNOTS

The Marine Weather Forecast In Detail:
PZZ820 Forecast Issued: 224 AM PDT Fri Sep 24 2021

Today...N Winds 15 To 25 Kt. Seas 7 To 10 Ft.
Tonight...N Winds 10 To 20 Kt. Seas 6 To 8 Ft.
Sat...N Winds 5 To 15 Kt, Diminishing To Less Than 10 Kt. Seas 5 To 7 Ft.
Sat Night...N To Nw Winds Less Than 10 Kt, Becoming W. Seas 6 To 7 Ft.
Sun...S To Sw Winds 5 To 15 Kt, Becoming S 10 To 20 Kt. Seas 5 To 7 Ft.
Sun Night...S To Sw Winds 10 To 20 Kt. Seas 5 To 8 Ft.
Mon...W To Sw Winds 5 To 15 Kt, Increasing To 10 To 20 Kt. Seas 8 To 13 Ft.
Mon Night...W To Nw Winds 10 To 20 Kt. Seas 10 To 16 Ft.
Tue...N To Nw Winds 10 To 15 Kt. Seas 12 To 15 Ft.
Tue Night...N Winds 15 To 25 Kt. Seas 11 To 13 Ft.
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Area Forecast Discussion
National Weather Service Eureka CA
243pm PST Wednesday Dec 1 2021

Synopsis
More coastal clouds will return to the area tonight and into Thursday. Daytime highs across the interior will continue.nue to run well above normal, but nighttime lows and coastal temperatures will remain mostly seasonal. There next chance for rain looks to be early next week.

High pressure and offshore flow have brought mostly clear skies across the area today. There were some areas of low clouds in the Eel river valley and the Trinity River Valley, but these dissipated by midday. The high pressure and warm air aloft has created stronger inversions in the valleys. This is keeping the valleys cooler than expected both overnight and in the afternoons. Tonight the ridge starts to push off to the east. This will weaken offshore flow and start to lower the temperatures aloft. Models are showing a return of stratus tonight at the coast and there will likely be some in the northern interior valleys.

Friday the ridge continues to weaken and onshore flow increases. Temperatures inland will continue.nue to cool and stratus may become more prevalent at the coast. Saturday a shortwave trough will move into the Pacific Northwest. The rain is expected to remain north of the area, however the coastal areas may see some enhanced drizzle. Once this trough moves past the area a shortwave ridge builds into the area. This is expected to bring dry conditions and more clearing to the area on Sunday.

Monday or Monday night models are showing a fast moving system moving down from the northwest. The ensembles continue to show some differences in timing and it is not expected to rain all day. The Quantitative Precipitation Forecast seems to have trended down slightly in general and it is looking less like Lake county will see much precip. Snow levels are expected to generally remain high with this system. In general Tuesday looks to be mainly dry with the potential for additional rain late in the week. MKK

Marine
Northerlies will weaken slightly today as the higher winds shift a little farther offshore, but this is expected to be shortlived. Winds will strengthen again tonight and Thursday as higher winds push back closer to the coast. Northerlies will weaken overnight on Thursday and throughout the day on Friday and then hover in the gentle to moderate breeze range through Saturday. Guidance then suggests that northerlies will ramp back up to fresh breezes over the outer waters on Sunday. Otherwise, a series of westerly swells are expected to move through the coastal waters through this weekend.

Global deterministic guidance is depicting a cutoff low splitting about 15 degrees north of the Hawaiian Islands this weekend, with the eastward portion of the split being jettisoned toward British Columbia then possibly intensifying off the west coast of Vancouver Island. Both the ECMWF (European Centre for Medium-Range Weather Forecasts) and GFS have this evolution depicted, however vary in the location of this eastern low after splitting along with the degree of intensification. The GFS is much more bullish with this system, currently depicting a large, strong fetch pushing southward down the west coast Sunday night and Monday, while the ECMWF is showing it barely intensifying before moving onshore. Thus the potential exists for a possibly large NW swell early next week, however confidence is low as to whether or not this will occur...despite recent output from WW3. /TDJ

.BEACH HAZARDS...Astronomical tides will continue.nue to increase this and peak over the weekend. At the North Spit tide gauge in Humboldt Bay astronomical tides will will be 8.7 feet. Minor flooding in the low lying areas around Humboldt Bay typically begins around 8.8 feet. Minor coastal flooding is likely around Humboldt Bay. Outside Humboldt Bay coastal flooding is not expected, but is still possible. MKK

.EKA WATCHES/WARNINGS/ADVISORIES... CA... None. NORTHWEST CALIFORNIA COASTAL WATERS... Small Craft Advisory until 9pm PST Thursday for PZZ470-475.