Sunrise 6:10 AM   Sunset 8:02 PM Moonrise 2:16 AM   Moonset 12:57 PM

  Print   HELP   Reset   Save   Recall

PZZ545 Coastal Waters From Point Reyes To Pigeon Point California Out To 10 Nm- 832 Am Pdt Thu May 2 2024
.gale warning in effect through this evening - .
Rest of today - NW winds 20 to 30 knots with gusts up to 40 knots. Wind waves 7 to 9 ft. NW swell 3 to 5 ft at 11 seconds. Tonight - NW winds 20 to 30 knots. Wind waves 6 to 8 ft. NW swell 3 to 4 ft at 9 seconds. Fri - NW winds 15 to 25 knots with gusts up to 30 knots. Wind waves 4 to 6 ft. NW swell 2 to 3 ft at 8 seconds. Fri night - W winds 10 to 20 knots with gusts up to 30 knots. Wind waves 4 to 6 ft. NW swell 2 to 3 ft at 8 seconds. Sat - W winds 10 to 20 knots with gusts up to 30 knots. Wind waves 3 to 4 ft. W swell around 2 ft at 8 seconds. Rain.Sat night - NW winds 15 to 20 knots with gusts up to 30 knots. Wind waves 4 to 5 ft. NW swell 2 to 4 ft at 8 seconds and sw around 2 ft at 15 seconds. Sun - NW winds 10 to 20 knots with gusts up to 25 knots. Wind waves 5 to 7 ft. NW swell 3 to 4 ft and sw around 2 ft. Mon - NW winds 10 to 20 knots with gusts up to 25 knots. Wind waves 4 to 6 ft. Mixed swell nw 3 to 4 ft and sw 2 to 3 ft.
- .san francisco bar/fourfathom bank forecast - - .
in the deep water channel - .mixed seas of 4 to 6 ft at 9 seconds.
across the bar - .mixed seas of 5 to 7 ft at 9 seconds. Maximum ebb current of 2.0 kt at 12:03 pm Thursday and 2.1 kt at 01:23 am Friday.

PZZ500 832 Am Pdt Thu May 2 2024
Synopsis for the central california coast and bays including the Monterey bay - Greater farallones - .and cordell bank national marine sanctuaries - .
strong winds persist throughout Friday, with gale force gusts of 40 to 45 knots possible. Strong winds will result in hazardous seas and steep wind waves with significant wave heights reaching 10 to 13 feet in the outer waters. Conditions gradually improve over the weekend and into next week as winds begin to ease. Rain chances begin early Saturday as a trough descends over the region.

FXUS66 KMTR 021842 AFDMTR

Area Forecast Discussion National Weather Service San Francisco CA 1142 AM PDT Thu May 2 2024

New AVIATION

SYNOPSIS
Issued at 307 AM PDT Thu May 2 2024

A ridge of high pressure will keep daytime temperatures mild to warm across the region throughout late week. Breezy onshore winds will keep temperatures cooler near the coast. Wet, unsettled conditions returning Friday night into Saturday, much cooler inland Saturday. Unseasonably cool daytime highs continuing into early next week then gradually warming by the middle of the week.

UPDATE
Issued at 841 AM PDT Thu May 2 2024

Quick update for this morning. Satellite shows largely clear skies across the CWA Today and Friday's highs still expected to be on the warm, but pleasant side with interior regions seeing max temps in the upper 70s to low 80s. Closer to the coast, highs will be in the 60s with breezy northwest winds. That being said, enjoy the warm temperatures and sunshine today and tomorrow! Saturday, light and beneficial rain accompanied by overcast conditions are still expected over the region. All for now.

SHORT TERM
(Today and tonight)
Issued at 349 AM PDT Thu May 2 2024

Dry air, a continental influence is remaining locked in over the forecast area. The northerly 5.9 mb ACV-SFO and 2.6 mb UKI-STS pressure gradients are resulting in dry northerly wind flow, over the coastal waters gale warnings continue. Seeing some increases in water vapor and stratus/fog development over the coastal waters per recent satellite imagery while drier air/clear sky is still prevailing closer to the coastline. A trough moving across northernmost CA/OR will ease the ACV-SFO pressure gradient a little today and tonight, the UKI-STS gradient not really easing until tonight.

Lower to mid level ridging continues through tonight. A lower level temperature inversion within 500-800 feet of the surface is seen on the Bodega Bay and Fort Ord profilers. Early May insolation tapping the lower level inversion will bring daytime temperatures back up a few degrees above early May normals inland. It'll remain cooler along the coast today. Highs 60s coastside, 70s to lower 80s inland.

LONG TERM
(Friday through Wednesday)
Issued at 349 AM PDT Thu May 2 2024

Seeing good global and mesoscale model agreement, one long wave trough is now stationary along the West Coast, part of an unsteady northern hemispheric long wave trough pattern. A low pressure system from the Aleutian Islands will move through the long wave trough and bring rain to our forecast area Friday night and Saturday. Rain developing first over the North Bay Friday night, rain quickly spreading southeastward across much of the rest of the forecast area Saturday. Expect noticeably cooler temperatures especially inland Saturday with daytime highs in the upper 50s to mid 60s, warmest southern interior; daytime temperatures 5F to 15F below early May normals. The low is still expected to brush by and tap higher levels of water vapor extending far north of Hawaii, while retaining a strong mid-latitude influence e.g. it's an appreciably cold core system up through the 700 mb level by comparison on Oakland upper air climatology, the pool of cold air a little more compact by the 500 mb level. Unlikely there'll be layer instability extending above 700 mb, forecast 700-500 mb lapse rates are low and much more stable. Recent precipitable water values on the GFS maintain between 1.00" and 1.10" Saturday, not far from the max moving average on Oakland upper air sounding climatology in early May.

Seeing some recent increases in model forecast rainfall amounts.
For example over 0.50" to 1" rain totals North Bay, near 0.50" low elevations and up to 0.75" to 1" East Bay hills/mountains and the Santa Cruz Mountains, 0.10" to 0.20" interior north Central Coast to around 0.50" Big Sur Coast. The Bay Area and northernmost north Central Coast may receive over half if not nearly May normal precipitation from this system if current QPF verifies. As mentioned expect wet and cooler weather Saturday, gusty northwest winds over the coast temporarily subsiding with the passage of a surface cold front/trough.

Chilly to cold overnight low temperatures for the time of year (40s coastside and bayside / 30s inland) are forecast late Saturday night to Sunday morning and Sunday night to Monday morning. San Francisco and Oakland downtown possibly including a few other locations may be nearing record lows Sunday and Monday mornings. Stay tuned to updates, right now Sun-Mon mornings look to be the chilliest. Forecast temperature guidance could edge a little lower between now and late weekend.

Otherwise dry weather returns Sunday. The surface pressure pattern favors gusty northwest winds redeveloping over the coastal waters late in the weekend and continuing early next week. Daytime highs gradually warming by the middle of next week.

AVIATION
(18Z TAFS)
Issued at 1142 AM PDT Thu May 2 2024

VFR prevails through the TAF period for the majority of terminals in the region. Gusty W/NW winds will be the primary impact once more today, with terminals seeing gusts generally in the 20-25 knot range and sustained winds around 10-15 knots. Current thoughts are that gusts should diminish towards the 04-06Z hours for most terminals, with sustained winds easing to below 10 knots towards midnight.
Stratus will hug the coastline tonight, but is not expected to advect inland thanks to ridging helping to squash cloud decks and prevent them from being able to cross the coastal mountain barrier in many locations, with the exception of KMRY.

Vicinity of SFO...VFR through the TAF period, with W/NW winds strengthening into the afternoon to become strong around 25 knots sustained, and gusting to around 32-34 knots at the strongest. Time of peak winds towards 00Z this evening, but gusts quickly decrease towards 04Z. Confidence on gusts remaining below 35 knots is moderate. A FEW-SCT low clouds may filter into the SFO terminal in the early to mid morning of Friday, but low confidence on any CIGs developing. Moderate to strong onshore winds return Friday afternoon.

SFO Bridge Approach...Similar to SFO.

Monterey Bay Terminals...VFR prevailing through the early evening, with moderate onshore winds gusting to around 25 knots in the late afternoon. Low clouds will begin to push into the terminal space towards the later evening, bringing MVFR CIGs , just on the cusp of becoming IFR. Into the early morning of Friday, CIGs are expected to lower to become predominantly IFR and lasting through at least sunrise of Friday.

MARINE
(Today through Tuesday)
Issued at 841 AM PDT Thu May 2 2024

Strong winds persist throughout Friday, with gale force gusts of 40 to 45 knots possible. Strong winds will result in hazardous seas and steep wind waves with significant wave heights reaching 10 to 13 feet in the outer waters. Conditions gradually improve over the weekend and into next week as winds begin to ease. Rain chances begin early Saturday as a trough descends over the region.

MTR WATCHES/WARNINGS/ADVISORIES
CA...None.
PZ...Small Craft Advisory from 3 PM Friday to 3 AM PDT Saturday for Mry Bay-SF Bay N of Bay Bridge.

Small Craft Advisory until 3 AM PDT Friday for Mry Bay.

Gale Warning until 9 PM PDT this evening for Pt Arena to Pt Reyes 0-10 nm-Pt Arena to Pt Reyes 10-60 NM-Pt Reyes to Pigeon Pt 0-10 nm.

Gale Warning until 3 AM PDT Friday for Pigeon Pt to Pt Pinos 0- 10 nm-Pigeon Pt to Pt Pinos 10-60 NM-Pt Pinos to Pt Piedras Blancas 0-10 nm.

toggle option: (graph/table)

Half Moon Bay
Click for Map
Thu -- 12:17 AM PDT     2.80 feet Low Tide
Thu -- 03:16 AM PDT     Moonrise
Thu -- 05:31 AM PDT     4.52 feet High Tide
Thu -- 06:12 AM PDT     Sunrise
Thu -- 12:32 PM PDT     -0.23 feet Low Tide
Thu -- 01:56 PM PDT     Moonset
Thu -- 07:39 PM PDT     4.65 feet High Tide
Thu -- 08:01 PM PDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION

Half Moon Bay, California, Tide feet

San Mateo Bridge
Click for Map
Thu -- 12:16 AM PDT     -0.76 knots Max Ebb
Thu -- 03:15 AM PDT     Moonrise
Thu -- 03:22 AM PDT     0.00 knots Slack
Thu -- 05:45 AM PDT     0.86 knots Max Flood
Thu -- 06:11 AM PDT     Sunrise
Thu -- 08:41 AM PDT     -0.00 knots Slack
Thu -- 12:20 PM PDT     -1.49 knots Max Ebb
Thu -- 01:55 PM PDT     Moonset
Thu -- 03:46 PM PDT     0.01 knots Slack
Thu -- 06:47 PM PDT     1.67 knots Max Flood
Thu -- 08:00 PM PDT     Sunset
Thu -- 10:22 PM PDT     -0.01 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION

San Mateo Bridge, South San Francisco Bay, California Current, knots

Full Color Weather Map

Link to Loop


Other links: GEOS-West     Contential US     Full GOES-East

San Francisco Bay Area, CA,