Los Altos, CA Marine Weather and Tide Forecast
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Marine Weather and Tide Forecast for Los Altos, CA

June 15, 2024 11:11 AM PDT (18:11 UTC) Change Location
Sunrise 5:45 AM   Sunset 8:32 PM
Moonrise 1:37 PM   Moonset 12:51 AM 
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NOTE: Some of the data on this page has not been verified and should be used with that in mind. It may and occasionally will, be wrong. The tide reports are by xtide and are NOT FOR NAVIGATION.

Marine Forecasts
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PZZ531 San Francisco Bay South Of The Bay Bridge- 849 Am Pdt Sat Jun 15 2024

.small craft advisory in effect through late Sunday night - .

Today - W wind 10 to 15 kt, easing to 5 to 10 kt late this morning, rising to 15 to 20 kt early this afternoon, rising to 20 to 25 kt late. Waves around 2 ft or less.

Tonight - W wind 20 to 25 kt with gusts up to 35 kt, easing to 10 to 15 kt after midnight. Waves around 2 ft or less.

Sun - W wind 5 to 10 kt, rising to 20 to 25 kt in the afternoon. Waves around 2 ft or less.

Sun night - W wind 20 to 25 kt with gusts up to 35 kt, easing to 10 to 15 kt after midnight. Waves around 2 ft or less.

Mon - W wind 15 to 20 kt. Waves around 2 ft or less.

Mon night - W wind 10 to 15 kt, becoming sw 5 to 10 kt after midnight. Waves around 2 ft or less.

Tue - W wind 5 to 10 kt, rising to 10 to 15 kt in the afternoon. Waves around 2 ft or less.

Tue night - W wind 10 to 15 kt, becoming sw 5 to 10 kt after midnight. Waves around 2 ft or less.

Juneteenth - W wind around 5 kt, rising to 10 to 15 kt in the afternoon. Waves around 2 ft or less.

Wed night - W wind 10 to 15 kt, easing to 5 to 10 kt after midnight. Waves around 2 ft or less.

PZZ500 849 Am Pdt Sat Jun 15 2024

Synopsis for the central california coast and bays including the Monterey bay - Greater farallones - .and cordell bank national marine sanctuaries - .
a tight pressure gradient over the waters will allow for strong northwesterly breezes and widespread gale force gusts to persist through the weekend. Significant wave heights will be 12-17 feet through the weekend before beginning an abating trend Monday. Hazardous conditions will linger into early next week as winds remain strong and seas remain elevated.


7 Day Forecast for Marine Location Near Los Altos, CA
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Area Discussion for - San Francisco/Monterey Bay Area, CA
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FXUS66 KMTR 151756 AFDMTR

Area Forecast Discussion National Weather Service San Francisco CA 1056 AM PDT Sat Jun 15 2024

New AVIATION, MARINE

SYNOPSIS
Issued at 254 AM PDT Sat Jun 15 2024

Dry and windy with elevated fire concerns into early next week.
Seasonal temps and quiet weather midweek. Potential warming trend for late next week.

UPDATE
Issued at 917 AM PDT Sat Jun 15 2024

Drier air continues to move into our area, bringing some clear skies this morning. Observations show moments of increased winds in the hills and mountains up to 40-60 mph out of the north. With the drier area and northerly winds, be sure to take precaution for any outdoor activities that may cause any "sparks". No changes to the forecast were made, as conditions remain on track.

SO

SHORT TERM
Issued at 254 AM PDT Sat Jun 15 2024 (Today and tonight)

What a difference 24 hours makes...June-Gloom is all but gone. The longwave pattern over the West remains relatively unchanged with an upper low anchored off the BC Coast and an upper level trough covering the PacNW into NorCal. Additionally, a weak upper level boundary pushed through the region on Friday. The passing boundary helped to set the stage for the much talked about burst of northerly winds. The SFO-ACV gradient ramped up to over -6mb and the SFO-SAC gradient topped out at over 4mb. This pressure gradient set up is perfect for gusty northerly winds and stronger onshore flow. A sampling of winds over the last 12 hours shows gusts 40-60 mph, with the strongest winds over the coastal waters, immediate coastline, higher peaks, and any inland gap/pass. The stronger N-S gradient helped to mix out the marine layer (June- Gloom)for the most part. Latest satellite fog product does show some patchy stratus trying to develop along the SF Peninsula coast, Pt Reyes, and East Bay Hills. That will be it, patchy at best through sunrise. Lastly, the better mixed low levels has also led to slightly warmer overnight temperatures.

Rest of today and tonight - breezy to gusty winds will persist thanks to the stronger N-S and W-E gradients. Still not strong enough or widespread enough for a Wind Advisory, but strong enough for minor impacts like blowing small unsecured items around. The biggest impact will be to the marine environment with steeper wind waves and hazardous conditions. Interestingly enough, a very pronounced coastal jet forms south of Pt Sur. In fact, latest forecast has winds approaching Storm Force conditions with a few gusts flirting with the 48 kt (55mph) mark. Moderate to high confidence on these stronger coastal waters winds as ensemble guidance indicate high exceedance values (80+ percent) greater than 50 mph. Additionally, the ECMWF EFI shows how unusually strong the winds are for this time of year and a good portion of the ensemble members are favoring the "extreme" side. One other impact for the persistent northerly winds over the waters will be effective Ekman transport and increased upwelling. In other word, colder water along the coast. The change in airmass associated with stronger northerly flow will lead to cool temperatures today, especially over the interior.

LONG TERM
Issued at 335 AM PDT Sat Jun 15 2024 (Sunday through Friday)

No big changes with the overall sensible weather for Sunday and Monday. Not much in the way of night/morning clouds and associated marine layer thanks to persistent breezy/gusty northerly flow.
Temperatures at night will be milder thanks to better mixing and seasonably cool during the day.

By Tuesday northerly flow will begin to slowly ease as the upper trough weakens. In fact, the longwave pattern aloft begin to become more zonal and then favors a more ridge like pattern for the second half of the week into the following weekend. So what does this pattern shift mean? A gradual warming trend with a potential for much warmer weather by next weekend. While tonight's guidance may have backed off from the more "extreme heat" around June 21/22 it is still plenty warm across the interior. Both CPC and WPC continue to highlight portions of the Bay Area and Central Coast for excessive heat from June 21-26
Stay tuned

AVIATION
(18Z TAFS)
Issued at 1051 AM PDT Sat Jun 15 2024

Currently VFR at all terminals. High confidence in VFR through the TAF period at all terminals as strong winds are allowing for the marine layer to stay thoroughly mixed out. Strong winds will impact all terminals through the TAF period, particularly terminals within close proximity to the coast or within a northwest-southeast oriented valley. While below LLWS criteria, it will likely be bumpy getting out of the area.

Vicinity of SFO...Currently VFR with westerly flow. VFR through the TAF period. AWW in effect from 21Z this afternoon through 06Z tonight for strong westerly winds in excess of 35 knots. Westerly winds will somewhat diminish overnight before approaching the AWW criteria of 35 knots again tomorrow afternoon.

SFO Bridge Approach...Similar to SFO.

Monterey Bay Terminals...Currently VFR with northwesterly flow at both terminals. VFR through the TAF period. Low probability and low confidence of ceilings developing through the TAF period as the strong winds are keeping the marine layer thoroughly mixed out, but if ceilings were to develop they would likely be IFR-MVFR in the early morning hours, around 12Z or so. Winds will prevail out of the west through the TAF period, becoming gusty this afternoon.

MARINE
(Today through Thursday)
Issued at 1051 AM PDT Sat Jun 15 2024

A tight pressure gradient over the waters will allow for strong northwesterly breezes and widespread gale force gusts to persist through the weekend. Significant wave heights will be 12-17 feet through the weekend before beginning an abating trend Monday.
Hazardous conditions will linger into early next week as winds remain strong and seas remain elevated.

FIRE WEATHER
Issued at 345 AM PDT Sat Jun 14 2024

Elevated Fire Weather Conditions Through The Weekend

*Increasing northerly winds, especially higher terrain *Lowering relative humidity values day and night

Forecast remains on track as northerly flow ramps up across the district. Gusts of 30-50 mph will be more common along the coast, higher terrain, and inland gaps/passes. Have already seen a few isolated inland passes reach close to 60 mph as well. These stronger winds will persist through early Monday. It should be noted that they will not be strong the entire time, more like bursts of stronger winds. The northerly flow has also ushered in much drier air across the region too. 24 hour trends show some locations 40-70% drier than 24 hours ago. While there are a few isolated stations that may "technically" reach Red Flag criteria conditions are not widespread enough to warrant a fire weather zone wide Red Flag warning. Therefore, still best to message elevated fire weather conditions through the weekend.

Regardless, individuals with outdoor activities planned this weekend should be fire weather aware. Be mindful and don't be "that spark".

MM

MTR WATCHES/WARNINGS/ADVISORIES
CA...None.
PZ...Small Craft Advisory until 9 PM PDT this evening for SF Bay N of Bay Bridge.

Small Craft Advisory from 3 PM Sunday to 3 AM PDT Monday for SF Bay N of Bay Bridge.

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

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




Weather Reporting Stations
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Stations Dist Age Wind AirWater WavesinHgDewPt
RTYC1 - 9414523 - Redwood City, CA 10 mi71 minWNW 7G9.9 63°F 70°F30.03
AAMC1 - 9414750 - Alameda, CA 28 mi71 minSW 2.9G4.1 59°F 66°F30.04
LNDC1 29 mi71 minWSW 4.1G5.1 61°F 30.03
OKXC1 - 9414776 - Oakland (Berth 34), CA 31 mi71 minWNW 4.1G5.1 59°F 30.03
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 31 mi71 minSW 4.1G5.1
PXOC1 - 9414311 - San Francisco (Pier 1), CA 32 mi71 minNNE 1.9G2.9 59°F 30.00
PXSC1 32 mi77 min 60°F
FTPC1 - 9414290 - San Francisco, CA 34 mi71 minSW 8G12 57°F 30.03
PPXC1 - 9414847 - Richmond (Point Potrero), CA 38 mi71 minSSW 5.1G6 60°F 30.05
46237 - San Francisco Bar, CA (142) 39 mi71 min 54°F 53°F6 ft
TIBC1 - Tiburon Pier, San Francisco Bay, CA 39 mi117 minSSE 11 60°F 30.0148°F
RCMC1 - 9414863 - Richmond, CA 40 mi71 minSSE 7G8 59°F 60°F30.02
46276 41 mi75 min 54°F 57°F4 ft
46279 41 mi75 min 55°F 57°F4 ft
1801583 42 mi101 minNW 29G35 54°F 52°F10 ft30.0648°F
46092 - MBM1 44 mi59 minWNW 19 54°F 54°F30.05
ELXC1 - Elkhorn Slough Reserve, CA 44 mi86 minNW 2.9 60°F 30.0452°F
MLSC1 - Moss Landing, South Harbor, CA 44 mi55 minWSW 4.1 56°F 30.0451°F
MZXC1 - 9415102 - Martinez-Amorco CA 45 mi71 minW 12G14 62°F 67°F30.02
UPBC1 45 mi71 minWNW 11G17
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 46 mi61 min 51°F8 ft
PCOC1 - 9415144 - Port Chicago, CA 46 mi71 minW 14G18 62°F 30.00
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 46 mi71 minWNW 14G19 66°F 29.98
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 47 mi71 minWSW 6G8 62°F 30.02


Wind History for Redwood City, CA
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Airport Reports
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Wind History graph: NUQ
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Tide / Current for Palo Alto Yacht Harbor, California
   
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Palo Alto Yacht Harbor
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Sat -- 01:51 AM PDT     Moonset
Sat -- 03:26 AM PDT     1.72 feet Low Tide
Sat -- 05:46 AM PDT     Sunrise
Sat -- 08:11 AM PDT     5.84 feet High Tide
Sat -- 02:36 PM PDT     Moonrise
Sat -- 03:19 PM PDT     1.68 feet Low Tide
Sat -- 08:31 PM PDT     Sunset
Sat -- 08:49 PM PDT     7.58 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

Palo Alto Yacht Harbor, California, Tide feet
12
am
4.7
1
am
3.6
2
am
2.5
3
am
1.8
4
am
1.9
5
am
2.8
6
am
4.1
7
am
5.3
8
am
5.8
9
am
5.6
10
am
5
11
am
4.3
12
pm
3.6
1
pm
2.9
2
pm
2.2
3
pm
1.7
4
pm
1.9
5
pm
2.9
6
pm
4.5
7
pm
6.2
8
pm
7.3
9
pm
7.6
10
pm
7.1
11
pm
6.3


Tide / Current for Dumbarton Point 2.3 mi NE, South San Francisco Bay, California Current
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Dumbarton Point 2.3 mi NE
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Sat -- 12:51 AM PDT     -0.72 knots Max Ebb
Sat -- 01:51 AM PDT     Moonset
Sat -- 03:50 AM PDT     0.00 knots Slack
Sat -- 05:46 AM PDT     Sunrise
Sat -- 06:15 AM PDT     0.64 knots Max Flood
Sat -- 08:59 AM PDT     -0.00 knots Slack
Sat -- 12:56 PM PDT     -0.59 knots Max Ebb
Sat -- 02:36 PM PDT     Moonrise
Sat -- 03:28 PM PDT     0.00 knots Slack
Sat -- 06:14 PM PDT     0.88 knots Max Flood
Sat -- 08:31 PM PDT     Sunset
Sat -- 09:17 PM PDT     -0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

Dumbarton Point 2.3 mi NE, South San Francisco Bay, California Current, knots
12
am
-0.7
1
am
-0.7
2
am
-0.6
3
am
-0.4
4
am
0.1
5
am
0.5
6
am
0.6
7
am
0.6
8
am
0.4
9
am
-0
10
am
-0.2
11
am
-0.4
12
pm
-0.6
1
pm
-0.6
2
pm
-0.5
3
pm
-0.2
4
pm
0.3
5
pm
0.7
6
pm
0.9
7
pm
0.8
8
pm
0.6
9
pm
0.2
10
pm
-0.2
11
pm
-0.5


Weather Map
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GEOS Local Image of Central West Coast   
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San Francisco Bay Area, CA,




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