Tuesday, February25, 2020
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Marine Weather and Tides
Las Lomas, CA

Version 3.4
NOTICE
12/16/2019 NOAA is having trouble with requests that include wind gusts. I am posting graphs without wind gusts until it gets fixed.
10/9/2019 Updated the Marine Zones.
9/4/2019 Fixed the weather maps due to NOAA moving them.
7/25/2019 New feature in the Airports section gives a link to 5 minute updates for data reports.

Sunrise 6:41AMSunset 5:58PM Tuesday February 25, 2020 12:13 AM PST (08:13 UTC) Moonrise 8:06AMMoonset 8:01PM Illumination 3% Phase: Waxing Crescent; Moon at 2 days in cycle
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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PZZ535 Monterey Bay- 812 Pm Pst Mon Feb 24 2020
Tonight..W winds up to 10 kt. Wind waves 1 ft. W swell 3 to 5 ft at 14 seconds.
Tue..W winds up to 10 kt. Wind waves 1 to 2 ft. W swell 3 to 5 ft at 14 seconds.
Tue night..E winds around 5 kt. Wind waves 1 ft. W swell 2 to 4 ft at 13 seconds.
Wed..SW winds 5 to 10 kt. Wind waves 1 ft. W swell 2 to 4 ft at 13 seconds.
Wed night..E winds up to 10 kt. Wind waves 1 ft. W swell 3 to 5 ft at 13 seconds.
Thu..N winds up to 10 kt. Wind waves 1 ft. W swell 4 to 6 ft.
Fri..NW winds up to 10 kt. Wind waves 1 ft. W swell 4 to 6 ft. Locally lower winds and seas across sheltered portions of the bay.
PZZ500 812 Pm Pst Mon Feb 24 2020
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... High pressure off the west coast will maintain a strong northerly surface pressure gradients over the coastal waters into Tuesday with the strongest winds over the offshore waters. By midweek winds will ease slightly as the gradient eases while a longer period swell passes through. Wind and seas will increase later Saturday into Sunday as the next storm approaches from the pacific northwest.


7 Day Forecast for Marine Location Near Las Lomas, CA
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location: 36.86, -121.76     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
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FXUS66 KMTR 250533 AFDMTR

Area Forecast Discussion National Weather Service San Francisco Bay Area 933 PM PST Mon Feb 24 2020

SYNOPSIS. Mostly clear skies and warmer temperatures will prevail through late in the week as high pressure builds inland and low- level flow remains offshore. An upper level trough of low pressure will approach from the northwest next weekend, bringing much cooler temperatures and the possibility of some rain.

DISCUSSION. as of 08:52 PM PST Monday . No updates this evening as the forecast remains on track. Skies are clear this evening as offshore flow brings dry air from northern California to the Bay Area and Central Coast. The offshore pressure gradient is increasing and gusts in the hills have increased to 20-30 mph. Expecting gusts up to 40 mph in the hills overnight as surface high pressure continues to build over the Great Basin. Lows tonight should be several degrees milder than last night due to the increased winds and warming airmass, with 40s in the lower elevations and 40s to low 50s in the hills.

Well above normal temperatures are expected this week as 850 mb temps warm to 12-14 C. Highs tomorrow will be very warm with 70s in most areas and even some low 80s in interior locations. Gusty winds in the hills will decrease tomorrow as the offshore gradient weakens. Throughout the upcoming week, combined with light winds and mostly sunny skies the weather will be ideal for any outdoor activities. This weekend, a pattern change will occur with cooler temperatures, increased winds and a chance of rain. For additional details, see the previous discussion.

PREV DISCUSSION. as of 1:45 PM PST Monday . Morning low clouds and fog ultimately dissipated by midmorning giving way to abundant sunshine. In fact, afternoon satellite imagery shows little in the way of clouds for much of the state. As predicted offshore flow has kicked in, which helped to clear the clouds. The increasing northerly flow combined with clear skies has resulted in warmer temperatures this afternoon. 24 hour trends as of 1 PM show many locations several degrees warmer than the chilly Sunday. Highs today will generally be in the 60s and 70s.

Offshore flow is forecast to strengthen overnight leading to clear skies and gusty winds in the hills. Despite the clear skies the offshore winds will keep temperatures on the milder side with lows in the 40s and possibly in the 50s for the hills. With an offshore gradient (SFO-WMC) of nearly 10 mb gusts in the 30-40 mph seem reasonable for the hills. Winds will be breezy, but much lighter in the valleys.

High pressure, offshore flow, and a mild airmass will keep above normal temperatures in place Tuesday through at least Friday. Forecast high temperatures were tweaked slightly higher from previous forecast with a few more interior locations heading toward 80 degrees. A few climate sites will also make a run at some records on Tuesday.

The medium range forecast is still interesting to watch. A possible brief change in the pattern still looks likely for next weekend. The ridge weakens on Saturday with slightly cooler temperatures. Sunday on the other hand may see the first measurable precip in over a month for the Bay Area. The details keep changing between model consensus, single run to run consistency, and varying ensemble guidance. One particular example is the ECMWF trending from over one half of precip a few days ago to today's run showing zero for Downtown San Francisco. Definitely not a trend you'd want to see if rain is wanted. On the flipside, a handful of ensembles have actually trended wetter. Needless to say, but rain chances next Sunday are low confidence. Therefore, will keep the low end chance (20-40%) currently in the forecast. If it does actually rain amounts will definitely be on the lower end given the lack of moisture tap. One item that is higher confidence for Sunday will be the temperature drop with highs back into the 50s and 60s.

High pressure rebuilds early next week with warming and drying.

AVIATION. as of 9:33 PM PST Monday . For 06z TAFs. Clear skies and light winds prevail across the region. Light offshore/dry surface flow is anticipated to develop tonight keeping skies clear of low clouds into Tuesday. Stronger north to northeasterly winds are forecast aloft which may result in LLWS across area terminals late tonight or early Tuesday morning.

Vicinity of KSFO . VFR conditions will prevail under clear skies and light offshore.

SFO Bridge Approach . VFR conditions will prevail under clear skies and light offshore flow. Some LLWS possible on final approach overnight into early Tuesday.

Monterey Bay Terminals . VFR conditions will prevail under clear skies and light offshore/dry flow in the boundary layer with southeast drainage winds for the Salinas Valley Tuesday morning.`

MARINE. as of 8:12 PM PST Monday . High pressure off the West Coast will maintain a strong northerly surface pressure gradients over the coastal waters into Tuesday with the strongest winds over the offshore waters. By midweek winds will ease slightly as the gradient eases while a longer period swell passes through. Wind and seas will increase later Saturday into Sunday as the next storm approaches from the Pacific Northwest.

MTR WATCHES/WARNINGS/ADVISORIES. Tngt. SCA . Pt Arena to Pigeon Pt 10-60 nm SCA . Pigeon Pt to Pt Piedras Blancas 10-60 nm SCA . Pt Arena to Pt Reyes 0-10 nm until 3 AM SCA . Pt Reyes to Pigeon Pt 0-10 nm until 3 AM SCA . Pt Pinos to Pt Piedras Blancas 0-10 nm until 3 AM



PUBLIC FORECAST: ST/MM AVIATION: CW MARINE: CW

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Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
ELXC1 - Elkhorn Slough Reserve, CA 3 mi88 min E 2.9 48°F 1024 hPa46°F
46092 - MBM1 16 mi56 min NNW 7.8 54°F 54°F1024.3 hPa (+0.0)
46240 - Cabrillo Point, Monterey Bay, CA (158) 18 mi43 min 55°F5 ft
MEYC1 19 mi97 min S 1.9 G 2.9 49°F 56°F1025.3 hPa
46114 - West Monterey Bay, CA 33 mi43 min 54°F9 ft
46042 - MONTEREY - 27NM West of Monterey Bay, CA 34 mi33 min NNW 16 G 19 54°F 54°F1025.1 hPa50°F
46239 - Point Sur, CA (157) 40 mi43 min 55°F9 ft

Wind History for Monterey, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Watsonville, Watsonville Municipal Airport, CA6 mi80 minN 510.00 miFair48°F43°F83%1025.4 hPa
Salinas, Salinas Municipal Airport, CA16 mi80 minN 010.00 miFair48°F43°F83%1026 hPa
Monterey Regional Airport, CA19 mi79 minE 510.00 miFair48°F42°F80%1026.3 hPa
Hollister, CA, CA19 mi78 minN 010.00 miFair45°F39°F81%1025.7 hPa

Link to 5 minute data for KWVI

Wind History from WVI (wind in knots)
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Last 24hrNW5N4CalmN3N4NW4CalmCalmCalmCalmCalm3SE4SW6SW5SW5S5S3SW3CalmSW3CalmN5Calm
1 day agoCalmCalmW5CalmCalmCalmCalmCalmCalmSW5SW5W4SW6SW7SW755SE5E4NE3N3N4N4N3
2 days agoNW6NW4NW3S7CalmCalmN3N3W5W4SW5W9NW11
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Tide / Current Tables for Elkhorn Slough railroad bridge, Monterery Bay, California
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Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.


Tide / Current Tables for Point Pinos, California Current
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Point Pinos
Click for Map
Tue -- 01:33 AM PST     -0.00 knots Slack
Tue -- 04:01 AM PST     -0.58 knots Max Ebb
Tue -- 06:44 AM PST     Sunrise
Tue -- 07:29 AM PST     0.00 knots Slack
Tue -- 08:06 AM PST     Moonrise
Tue -- 10:18 AM PST     0.55 knots Max Flood
Tue -- 01:15 PM PST     -0.00 knots Slack
Tue -- 04:14 PM PST     -0.78 knots Max Ebb
Tue -- 05:58 PM PST     Sunset
Tue -- 07:59 PM PST     0.00 knots Slack
Tue -- 08:01 PM PST     Moonset
Tue -- 10:51 PM PST     0.61 knots Max Flood
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.50.2-0.2-0.5-0.6-0.5-0.3-0.10.10.40.50.50.30.1-0.3-0.6-0.8-0.7-0.5-0.300.30.50.6

Weather Map
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wmap_P
GEOS Local Image of CentralWestCoast    EDIT
NOTE: East coast views moved to GEOS-16. They are experimental and not well supported by NOAA so they may not be correct so be warned. This change required redoing a large amount of the GOES code. If the image you are expecting is not showing, please let me know. You may need to use the EDIT function to update your location.
Link to Loop

Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for San Francisco/Monterey Bay Area, CA (3,6,7,8)
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Ground Weather Radar Station San Francisco Bay Area, CA
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The information on this web site has not been checked for accuracy. It is for entertainment purposes only and should be independently verified before using for any other reason. There are five sources. 1) Documents and manuals from a variety of sources. These have not been checked for accuracy and in many cases have not even been read by anyone associated with L-36.com. I have no idea of they are useful or accurate, I leave that to the reader. 2) Articles others have written and submitted. If you have questions on these, please contact the author. 3) Articles that represent my personal opinions. These are intended to promote thought and for entertainment. These are not intended to be fact, they are my opinions. 4) Small programs that generate result presented on a web page. Like any computer program, these may and in some cases do have errors. Almost all of these also make simplifying assumptions so they are not totally accurate even if there are no errors. Please verify all results. 5) Weather information is from numerous of sources and is presented automatically. It is not checked for accuracy either by anyone at L-36.com or by the source which is typically the US Government. See the NOAA web site for their disclaimer. Finally, tide and current data on this site is from 2007 and 2008 data bases, which may contain even older data. Changes in harbors due to building or dredging change tides and currents and for that reason many of the locations presented are no longer supported by newer data bases. For example, there is very little tidal current data in newer data bases so current data is likely wrong to some extent. This data is NOT FOR NAVIGATION. See the XTide disclaimer for details. In addition, tide and current are influenced by storms, river flow, and other factors beyond the ability of any predictive program.