Tuesday, July27, 2021
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Marine Weather and Tides
Emerald Lake Hills, CA

Version 3.4
NOTICE
3/30/2021 -- ANZ330 has been split into ANZ331 and ANZ332. Click EDIT in Marine Forecast and select your new zone.
1/26/2021 -- The West Coast Satellite images havd been updated. They now use GEOS-17.
1/1/2021 -- The 7 day forecast are now working well. Thank you NOAA for your support.

Sunrise 6:07AMSunset 8:23PM Monday July 26, 2021 11:36 PM PDT (06:36 UTC) Moonrise 9:34PMMoonset 7:50AM Illumination 91% Phase: Waning Gibbous; Moon at 18 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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PZZ531 San Francisco Bay South Of The Bay Bridge- 900 Pm Pdt Mon Jul 26 2021
Tonight..NW winds 10 to 15 kt. Gusts up to 25 kt this evening. A slight chance of showers and Thunderstorms.
Tue..NW winds 10 to 15 kt with gusts up to 25 kt. A slight chance of showers and Thunderstorms.
Tue night..W winds 15 to 20 kt with gusts up to 25 kt.
Wed..W winds 5 to 10 kt with gusts up to 25 kt.
Wed night..SW winds around 5 kt.
Thu..W winds 5 to 10 kt.
Thu night..W winds 5 to 10 kt.
Fri..W winds 10 to 15 kt.
Sat..W winds 10 to 15 kt. Winds and wind waves higher in and near Thunderstorms.
PZZ500 900 Pm Pdt Mon Jul 26 2021
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Light to locally breezy northwest winds continue to drive the sea state at around 8 to 9 seconds along with a weak southerly swell. Wind gusts will increase Tuesday afternoon and into the evening through the golden gate gap into the san francisco bay. Locally generated steep wind waves may be hazardous for smaller vessels. Slight chance of showers and high based Thunderstorms remains over the waters through Tuesday morning. Any developing Thunderstorms may be accompanied by lightning and erratic winds. Chances for Thunderstorms diminish Tuesday afternoon.


7 Day Forecast for Marine Location Near Emerald Lake Hills, CA
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location: 37.44, -122.34     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
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FXUS66 KMTR 270619 AFDMTR

Area Forecast Discussion National Weather Service San Francisco Bay Area 1119 PM PDT Mon Jul 26 2021

SYNOPSIS. Monsoon moisture has moved into our region with light shower activity today. Slight chance of showers and isolated thunderstorms continues into Tuesday morning. Long range trends remain seasonably warm and dry through the end of the month.

DISCUSSION. as of 08:59 PM PDT Monday . Currently radar shows a band of light showers beginning to move into southern Monterey County. The latest CAM's show this line continuing more west, eventually moving off shore around 1-2 AM PDT. Newest models runs have slowed things down a couple hours. High clouds and light showers should move into Monterey Bay around sunrise. Showers should reach the Bay Area by 10-11 AM PDT and the North Bay by 1-2PM PDT. The 00Z KOAK RAOB shows decent moisture above 850mbs, with PW at 1.13 inches. All of this moisture is still missing the buoyancy needed for thunderstorm activity. MU CAPE from the sounding shows 96 J/Kg with 20 CIN to overcome. This buoyancy is around -8 to -17 degrees C, which means there could be some very light and small hail with showers that have a chance to grow. Best chances to see this will be in the higher terrain. The chances for lightning are low, as model soundings still stable air around 400-300mbs (giving an EL around 25,000ft). This is another hurdle for any vertical growth updrafts seem to manage. Rain totals should be lighter, as the air below 850mbs is still very dry.

PREV DISCUSSION. as of 02:55 PM PDT Monday . Many folks have enjoyed seeing some light rain fall across the region today. It's been a long time since we've seen actual rain drops instead of just drizzle drops from marine stratus. The monsoon moisture arrived earlier today and the first wave of light showers moved across Monterey County from south to north and has continued to track northward. Isolated to scattered light showers are now in the North Bay. We have not had any reports of lightning so far, but one of our forecasters did report some small hail that briefly hit his home southeast of Marina, CA this morning. Measurable rain has generally been just a few hundredths although a few sites reported as much as 0.08". Current radar shows that the bulk of shower and lightning activity remains to our south and southeast.

So, how will the rest of today into tomorrow play out? The hi-res NAM and HRRR models are indicating that we should see a second wave of shower activity move from south to north later tonight into Tuesday morning. The difference being that the NAM illustrates a more organized line of showers while the HRRR has a more broken, disorganized wave of shower activity. From the hi- res NAM: estimated timing of that second wave starts around 8 pm tonight for southern Monterey County. This line of showers will be oriented SW to NE and should reach South Bay & East Bay after midnight (approx 2 am) then track across SF soon after. It will then start to impact the North Bay counties around 3 am and gradually track north until it exits far northern Sonoma County by Tuesday afternoon.

We are still seeing the models indicate some instability with this second wave of showers, so have kept the mention of showers and thunderstorms in the forecast. There is currently a large complex of thunderstorms straddling the southern NV and CA stateline that is producing a lot of lightning strikes . fortunately, it is also dropping good rain amounts ranging 0.25-0.75" with a few spots topping out over an inch. The models do not indicate that that complex will track directly into the Bay Area, but it does indicate that the instability is present. It will be interesting to see if the line of showers just west of that complex will carry some of that instability into our region and result in a few strikes. However, we're still viewing this event as low probability for thunderstorms. NAM is showing MUCAPE values up to 150 J/kg across our inland areas with this second wave while the showers over coastal waters might have more instability with MUCAPE peaking over 400 J/kg. Rain totals from the second wave are not expected to be super wet, likely staying under 0.10".

By Tuesday late afternoon/early evening, the excitement should be over and we will go back to a drier weather pattern. We've got a warm up in the forecast for the second half of the week with Thursday potentially being the warmest day. Coastal areas should peak in the mid 60s to mid 70s while inland spots range from the upper 70s to upper 90s. This is all thanks to a very large and broad high pressure ridge that will dominate much of the CONUS. By the weekend, that high pressure will weaken as an upper level low off the coast of Canada nudges inland and returns our region to a more marine influenced and seasonable climate.

AVIATION. as of 11:15 PM PDT Monday . For the 06z TAFs. Showers will continue to move up the Central Coast overnight with high clouds causing a cluttered view of stratus moving inland. The influence of these high clouds may also prevent some of the stratus moving into certain terminals until the late night and early morning. While these showers may offer some convection, they are not looking to lead to VCTS for the TAF sites, just VCSH. These showers will be moving north slowly, reaching the Monterey Bay in the next few hours, but not reaching the SF Bay until around 10z and even then this system could continue to slow down. Expect lowered CIGs overnight for all but the more interior terminals, such as SJC and LVK. Showers look to still linger in North Bay for mid morning, but clearing conditions will lead to widespread VFR again for Tuesday afternoon.

Vicinity of KSFO . VFR with high clouds through most of the night. Expect moments of inconsistent BKN012 CIGs around 10z with shower chances as well. Shower chances look spotty and cloud be push back into early Tuesday morning if this system keeps slowing down. Overnight winds remain westerly and mild. Expect cloud cover around the SF Bay to thin in the early to mid morning leading to VFR. Tuesday afternoon moderate northwesterly wind at SFO with peak winds around 15 kts, under mostly clear skies. These winds look to last through that evening but back off after nightfall.

KSFO Bridge Approach . Similar to KSFO.

Monterey Bay . Expect IFR and LIFR around the Monterey Bay in the late night with moments of fog and mist ahead of chances for showers. Winds become weak and variable in the late night. Cloud cover will thin in the late morning around the Monterey Bay terminals, marking a return to VFR. Winds look to remain mild through Tuesday morning, but become more moderate that afternoon.

MARINE. as of 11:17 PM PDT Monday . Light to locally breezy northwest winds continue to drive the sea state at around 8 to 9 seconds along with a weak southerly swell. Wind gusts will increase Tuesday afternoon and into the evening through the Golden Gate gap into the San Francisco Bay. Locally generated steep wind waves may be hazardous for smaller vessels. Slight chance of showers and high based thunderstorms remains over the waters through Tuesday morning. Any developing thunderstorms may be accompanied by lightning and erratic winds. Chances for thunderstorms diminish Tuesday afternoon.

MTR WATCHES/WARNINGS/ADVISORIES. Tngt. NONE.



PUBLIC FORECAST: Dhuyvetter AVIATION: Murdock MARINE: DK

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Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
RTYC1 - 9414523 - Redwood City, CA 8 mi48 min NNE 2.9 G 4.1 61°F 1015.4 hPa
AAMC1 - 9414750 - Alameda, CA 23 mi48 min N 2.9 G 5.1 60°F 68°F1015.1 hPa
OBXC1 25 mi54 min 59°F
LNDC1 25 mi48 min 60°F 1014.7 hPa
PXSC1 25 mi54 min 59°F 59°F
PXOC1 - 9414311 - San Francisco (Pier 1), CA 25 mi48 min WSW 2.9 G 4.1 58°F 1013.9 hPa
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 25 mi48 min ENE 1.9 G 2.9
OKXC1 - 9414776 - Oakland (Berth 34), CA 26 mi48 min NW 2.9 G 4.1 58°F 1014.9 hPa
FTPC1 - 9414290 - San Francisco, CA 26 mi48 min SW 5.1 G 11 56°F 61°F1014.8 hPa
46012 - HALF MOON BAY - 24NM South Southwest of San Francisco, CA 29 mi36 min SSW 5.8 G 9.7 55°F 1015 hPa54°F
46237 - San Francisco Bar, CA (142) 29 mi36 min 58°F4 ft
PPXC1 - 9414847 - Richmond (Point Potrero), CA 32 mi48 min WSW 4.1 G 8 59°F 1015.3 hPa
TIBC1 - Tiburon Pier, San Francisco Bay, CA 32 mi55 min SSE 7 56°F 1015 hPa
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 34 mi36 min S 7.8 G 12 1015.3 hPa
RCMC1 - 9414863 - Richmond, CA 34 mi54 min SW 4.1 G 6 58°F 63°F1015.1 hPa
46269 39 mi66 min 57°F 60°F3 ft
MZXC1 - 9415102 - Martinez-Amorco CA 43 mi48 min W 11 G 14 60°F 67°F1014.4 hPa
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 43 mi48 min SW 8 G 11 59°F 1014.5 hPa
UPBC1 43 mi48 min WNW 14 G 17
CQUC1 44 mi53 min 67°F
PCOC1 - 9415144 - Port Chicago, CA 45 mi48 min W 13 G 16 61°F 68°F1014.3 hPa
46042 - MONTEREY - 27NM West of Monterey Bay, CA 45 mi36 min NE 1.9 G 3.9 57°F 1015.4 hPa
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 48 mi48 min NW 13 G 17 62°F 1013.4 hPa

Wind History for Redwood City, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
San Carlos Airport, CA8 mi41 minN 010.00 miFair63°F54°F73%1014.9 hPa
Palo Alto Airport, CA12 mi2.8 hrsN 1010.00 miClear64°F57°F78%1013.2 hPa
San Francisco, San Francisco International Airport, CA12 mi40 minVar 310.00 miPartly Cloudy62°F53°F73%1014.3 hPa
Mountain View, Moffett Field, CA15 mi41 minNNW 410.00 miFair63°F55°F77%1014.6 hPa
Hayward, Hayward Air Terminal, CA19 mi42 minNNW 610.00 miFair60°F54°F80%1015.3 hPa
Oakland, Metro Oakland International Airport, CA19 mi43 minNNW 510.00 miMostly Cloudy59°F54°F83%1014.7 hPa
San Jose, San Jose International Airport, CA22 mi43 minNW 710.00 miPartly Cloudy64°F54°F70%1014.1 hPa

Link to 5 minute data for KSQL

Wind History from SQL (wind in knots)
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Last 24hrCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalm3NW7W9W10W8NW8W7CalmCalmCalmNW3Calm
1 day agoCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmNE5N6--N7NW8N13NW6NW9N8--CalmCalmN6Calm
2 days agoN4CalmCalmCalmCalmCalmCalmCalm33NE5N6N9N8NW9NW9NW10N12CalmNW6CalmNW6CalmCalm

Tide / Current Tables for Smith Slough, San Francisco Bay, California
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Smith Slough
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Tue -- 03:15 AM PDT     8.09 feet High Tide
Tue -- 06:09 AM PDT     Sunrise
Tue -- 09:54 AM PDT     Moonset
Tue -- 10:32 AM PDT     -0.37 feet Low Tide
Tue -- 04:57 PM PDT     7.44 feet High Tide
Tue -- 08:21 PM PDT     Sunset
Tue -- 10:57 PM PDT     2.38 feet Low Tide
Tue -- 11:01 PM PDT     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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4.25.87.287.975.53.71.90.5-0.3-0.30.62.245.777.4764.73.52.62.4

Tide / Current Tables for San Mateo Bridge, South San Francisco Bay, California Current
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San Mateo Bridge
Click for Map
Tue -- 12:49 AM PDT     1.47 knots Max Flood
Tue -- 03:57 AM PDT     -0.01 knots Slack
Tue -- 06:09 AM PDT     Sunrise
Tue -- 07:28 AM PDT     -1.88 knots Max Ebb
Tue -- 09:54 AM PDT     Moonset
Tue -- 10:51 AM PDT     0.01 knots Slack
Tue -- 01:41 PM PDT     1.88 knots Max Flood
Tue -- 05:17 PM PDT     -0.01 knots Slack
Tue -- 08:05 PM PDT     -1.15 knots Max Ebb
Tue -- 08:21 PM PDT     Sunset
Tue -- 11:01 PM PDT     Moonrise
Tue -- 11:04 PM PDT     0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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1.31.51.20.7-0-0.8-1.5-1.8-1.8-1.4-0.70.21.11.81.91.61.10.2-0.5-1-1.2-1-0.6-0.1

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NOTE: This section has been updated as of 1/26/2021. If the image you are expecting is not showing, please let me know. You may use the EDIT function to update your location.
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