Sunday, April18, 2021
Privacy Policy
L-36.com

Marine Weather and Tides
La Honda, CA

Version 3.4
NOTICE
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 6:27AMSunset 7:47PM Sunday April 18, 2021 1:38 PM PDT (20:38 UTC) Moonrise 9:46AMMoonset 12:15AM Illumination 43% Phase: First Quarter Moon; Moon at 7 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
    EDIT      (on/off)   Help
PZZ531 San Francisco Bay South Of The Bay Bridge- 843 Am Pdt Sun Apr 18 2021
Today..W winds around 5 kt, increasing to 10 to 20 kt with gusts up to 25 kt this afternoon.
Tonight..W winds 10 to 20 kt with gusts up to 25 kt.
Mon..W winds 5 to 15 kt.
Mon night..W winds 10 to 20 kt with gusts up to 25 kt.
Tue..W winds 10 to 20 kt with gusts up to 25 kt.
Tue night..SW winds 5 to 15 kt.
Wed..W winds 5 to 15 kt.
Thu..W winds 5 to 15 kt.
PZZ500 843 Am Pdt Sun Apr 18 2021
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Expect winds to gradually increase this afternoon and evening. Winds will then pick up further on Monday as a disturbance moves down from the pacific northwest into northern california. NEar gale force gusts may be possible over the northern waters by Tuesday morning. Elevated winds will persist through mid week. These winds will produce steep wind waves creating hazardous seas conditions, particularly for smaller vessels. Moderate northwest swell through the period along with a lighter longer period southerly swell.


7 Day Forecast for Marine Location Near La Honda, CA
   Hourly   EDIT   Help
location: 37.3, -122.29     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
      (on/off)   Help   NOTE: mouseover dotted underlined text for definition
FXUS66 KMTR 181834 AFDMTR

Area Forecast Discussion National Weather Service San Francisco Bay Area 1134 AM PDT Sun Apr 18 2021

SYNOPSIS. Temperatures will be well above normal today as ridging aloft continues. Slight cooling begins Monday, mainly in coastal areas. More widespread cooling is forecast for Tuesday as temperatures return to seasonal averages. Dry conditions persist through Friday with slight chances of rain next weekend.

DISCUSSION. as of 08:56 AM PDT Sunday . What a difference 24 hours makes. Building high pressure overhead and lingering offshore flow has resulted in a much more shallow marine layer this morning. In fact, profilers show the depth of the marine layer less than 1,000 feet. Despite the compression, low clouds did push inland into the Salinas Valley. Not only were the clouds lower, but the compressed marine layer resulted in locally dense fog. Fog has been reported along the immediate coast with visibilities at KSNS/KMRY/KWVI less than 1/2 mile. Inland clouds/fog will continue to erode back to the the immediate coastline this morning and this trend is already occuring at nearby airports. Clouds will likely linger along the coast through out the day keeping temperatures in check. Inland areas on the other hand will see ample sunshine leading to much warmer temperatures. For more details see below

PREV DISCUSSION. as of 03:56 AM PDT Sunday .

Today will feature clear skies and the warmest temperatures of the year for many locations, as the ridge expands over the state. Max temp's in the 80s will be felt in the north bay valleys, Santa Clara Valley, southern Salinas Valley, San Benito County, and inland East Bay. Spots around the SF Bay shoreline and elevated areas of Santa Cruz County may also reach the low 80s. The Pacific Coast will likely remain in the upper 50s to low to mid 70s, with cooling onshore breezes dominating in the afternoon. Still, a pleasant day for the coast, with warmer temp's not seen in recent weeks.

This warm spell will be short-lived however, as the coastal ridge begins to break down on Monday. Coastal areas will experience significant cooling during the day, with a building marine layer and more cloud cover. Further inland, it will be another warm day, with marine air having less of an influence, and 850 mb temps peaking, but still a few degrees of cooling can be expected. Thus low to mid 80s will persist in inland valleys, with upper 60s and 70s around the SF Bay shoreline and upper 50s and 60s along the Pacific coastline.

By Tuesday, the ridge moves well offshore, and an upper level disturbance moves over the NE part of the state, reaching the Great Basin early Wednesday. This will bring precip chances to the Sierra but nothing to our area, except cooler temp's, more clouds and breezier winds. Though cooler, temp's will be near normal. Wednesday will be another seasonable day, with slight warming forecast for the end of the week.

Things begin to get interesting towards Sunday when and upper low from the Gulf of Alaska approaches the PAC NW. Latest deterministic GFS run shows the low bringing light precip to NorCal early sunday into Monday. Euro run shows a trough axis pivoting over the west coast, bringing light to moderate rain to much of central and southern CA monday into Tuesday. More than half of the Euro ensemble members show QPF in this time frame, while the GEFS is closer to 25 percent. Still far out, but hopefully this isn't just another tease.

AVIATION. As of 11:30 AM PDT Sunday . For the 18Z TAFs. VFR at most all sites. The marine layer is hugging the coast, but will start to mix out as stronger winds build in over the waters this afternoon. Onshore winds will be lighter for the inland terminals, and mildly breezy for the coastal terminals this afternoon with more moderate winds at KSFO around 00Z. Skies will be SKC-FEW250 this afternoon and evening. The marine layer will return tonight around 08-10Z. KMRY/KSNS will see SCT008 start to advect inland around 03Z, reaching MVFR/IFR conditions around 08Z. Higher confidence in most sites returning to VFR by 17Z Monday.

Vicinity of KSFO . VFR with some low clouds along the coast west of the airport. Onshore winds will increase this afternoon to around 15-20 kt. Models and guidance show the potential for low clouds to move further inland late tonight, brining MVFR conditions from 10-16Z Monday morning. Winds will become more breezy Monday afternoon, with higher chances of G20-25kts.

SFO Bridge Approach . Similar to KSFO.

Monterey Bay Terminals . VFR conditions prevailing through this evening. Low clouds returning tonight will give MVFR/IFR conditions to KMRY/KSNS from 08-16Z. Lower chance for vis drops <1SM or +FG like was seen this morning. Light winds this morning increasing and turning onshore this afternoon. Onshore winds will become breezy Monday afternoon.

MARINE. as of 10:47 AM PDT Sunday . Expect winds to gradually increase this afternoon and evening. Winds will then pick up further on Monday as a disturbance moves down from the Pacific Northwest into northern California. Near gale force gusts may be possible over the northern waters by Tuesday morning. Elevated winds will persist through mid week. These winds will produce steep wind waves creating hazardous seas conditions, particularly for smaller vessels. Moderate northwest swell through the period along with a lighter longer period southerly swell.

MTR WATCHES/WARNINGS/ADVISORIES. Tday. SCA . Pigeon Pt to Pt Pinos 0-10 nm from 3 PM SCA . Pt Arena to Pt Reyes 0-10 nm from 3 PM SCA . Pt Arena to Pigeon Pt 10-60 nm from 3 PM



PUBLIC FORECAST: MM/Lorber AVIATION: Dhuyvetter MARINE: Dhuyvetter

Visit us at www.weather.gov/sanfrancisco

Follow us on Facebook, Twitter, and YouTube at: www.facebook.com/nwsbayarea www.twitter.com/nwsbayarea www.youtube.com/nwsbayarea


Weather Reporting Stations
   EDIT       (on/off)   Help   NOTE: Click on distance to see the station location on a map
Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
RTYC1 - 9414523 - Redwood City, CA 15 mi50 min N 5.1 G 6 70°F 1020.3 hPa
46269 29 mi38 min 50°F 55°F4 ft
46012 - HALF MOON BAY - 24NM South Southwest of San Francisco, CA 32 mi28 min NW 16 G 19 47°F 1021.8 hPa47°F
AAMC1 - 9414750 - Alameda, CA 33 mi50 min WSW 2.9 G 4.1 63°F 61°F1020 hPa
LNDC1 34 mi50 min WSW 4.1 G 5.1 68°F 1019.7 hPa
OKXC1 - 9414776 - Oakland (Berth 34), CA 35 mi50 min NW 8.9 G 11 57°F 1019.8 hPa
OBXC1 35 mi50 min 60°F 55°F
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 35 mi50 min NW 2.9 G 5.1
PXOC1 - 9414311 - San Francisco (Pier 1), CA 35 mi50 min ESE 1 G 2.9 61°F 1018.9 hPa
PXSC1 35 mi50 min 62°F 54°F
FTPC1 - 9414290 - San Francisco, CA 36 mi56 min WSW 15 G 22 51°F 58°F1020.3 hPa
46042 - MONTEREY - 27NM West of Monterey Bay, CA 36 mi28 min NW 16 G 19 49°F 53°F1021.1 hPa48°F
46237 - San Francisco Bar, CA (142) 38 mi38 min 55°F4 ft
46092 - MBM1 40 mi92 min WNW 9.7 48°F 53°F1020.4 hPa (+0.0)
46114 - West Monterey Bay, CA 42 mi72 min 53°F6 ft
PPXC1 - 9414847 - Richmond (Point Potrero), CA 42 mi62 min SW 7 G 8 60°F 1020.3 hPa
TIBC1 - Tiburon Pier, San Francisco Bay, CA 42 mi57 min Calm 66°F 1020 hPa
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 43 mi28 min NW 14 G 18 50°F1021.6 hPa
MLSC1 - Moss Landing, South Harbor, CA 43 mi42 min 55°F
ELXC1 - Elkhorn Slough Reserve, CA 44 mi53 min W 6 60°F 1022 hPa53°F
RCMC1 - 9414863 - Richmond, CA 44 mi56 min S 5.1 G 6 62°F 59°F1019.7 hPa

Wind History for Redwood City, CA
(wind in knots)    EDIT      (on/off)   Help
2
PM
3
PM
4
PM
5
PM
6
PM
7
PM
8
PM
9
PM
10
PM
11
PM
12
AM
1
AM
2
AM
3
AM
4
AM
5
AM
6
AM
7
AM
8
AM
9
AM
10
AM
11
AM
12
PM
1
PM
Last
24hr
NW10
G14
NW11
G15
NW11
NW10
G14
NW15
NW10
NW11
G14
NW5
G8
NW4
NW5
NW4
NW2
W1
S3
SW1
NW2
--
S2
S1
E2
N2
N2
N3
N5
1 day
ago
N16
NW14
G18
NW10
G14
NW14
G17
NW12
W11
G14
NW11
G14
NW9
W8
W6
W7
W5
G8
W4
W4
W8
W9
W6
W6
NW4
W2
NE3
NW4
G8
N9
N11
G15
2 days
ago
W11
G16
NW13
G16
NW16
NW16
NW14
G17
W11
W12
NW12
G15
NW7
NW6
NW7
G10
NW5
SW3
W3
--
SW2
NW5
W3
W3
SE4
E3
N1
N8
N12

Airport Reports
    EDIT      (on/off)   Help   Click EDIT to display multiple airports. Follow links for more data.
AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Palo Alto Airport, CA15 mi51 minN 810.00 miClear73°F54°F50%1019.6 hPa
San Carlos Airport, CA16 mi46 minVar 310.00 miClear77°F37°F24%1020 hPa
Half Moon Bay Airport, CA18 mi43 minNW 111.50 miFog/Mist52°F48°F88%1021.3 hPa
San Jose, San Jose International Airport, CA20 mi45 minNNW 410.00 miFair76°F38°F25%1019.1 hPa
San Francisco, San Francisco International Airport, CA22 mi42 minN 310.00 miFair73°F49°F43%1019.5 hPa

Link to 5 minute data for KPAO

Wind History from PAO (wind in knots)
2
PM
3
PM
4
PM
5
PM
6
PM
7
PM
8
PM
9
PM
10
PM
11
PM
12
AM
1
AM
2
AM
3
AM
4
AM
5
AM
6
AM
7
AM
8
AM
9
AM
10
AM
11
AM
12
PM
1
PM
Last 24hrNW12NW12NW15N15NW17NW15NW10NW6------------------4CalmCalm43N7N8
1 day agoN12NW13NW14N19--NW16NW9NW6------------------44----N7N11N12
2 days agoN13N15N16N14NW13N12N9NW12------------------CalmCalmCalm45----

Tide / Current Tables for Ano Nuevo Island, California
   EDIT   Weekend mode (on/off)   (on/off)   Help   One Week of Data
Ano Nuevo Island
Click for Map
Sun -- 01:14 AM PDT     Moonset
Sun -- 02:06 AM PDT     4.25 feet High Tide
Sun -- 06:30 AM PDT     Sunrise
Sun -- 09:38 AM PDT     0.07 feet Low Tide
Sun -- 10:46 AM PDT     Moonrise
Sun -- 05:33 PM PDT     3.22 feet High Tide
Sun -- 07:47 PM PDT     Sunset
Sun -- 09:48 PM PDT     3.33 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

12
am
1
am
2
am
3
am
4
am
5
am
6
am
7
am
8
am
9
am
10
am
11
am
12
pm
1
pm
2
pm
3
pm
4
pm
5
pm
6
pm
7
pm
8
pm
9
pm
10
pm
11
pm
3.94.14.34.13.732.11.20.50.10.10.40.81.422.633.23.23.33.33.33.33.4

Tide / Current Tables for Dumbarton Bridge, San Francisco Bay, California Current
   EDIT      (on/off)   Help   One Week of Data
Dumbarton Bridge
Click for Map
Sun -- 01:15 AM PDT     Moonset
Sun -- 02:58 AM PDT     0.82 knots Max Flood
Sun -- 06:03 AM PDT     -0.00 knots Slack
Sun -- 06:29 AM PDT     Sunrise
Sun -- 09:23 AM PDT     -1.04 knots Max Ebb
Sun -- 10:44 AM PDT     Moonrise
Sun -- 12:50 PM PDT     0.00 knots Slack
Sun -- 04:19 PM PDT     1.19 knots Max Flood
Sun -- 07:46 PM PDT     Sunset
Sun -- 09:12 PM PDT     -0.00 knots Slack
Sun -- 10:15 PM PDT     -0.14 knots Max Ebb
Sun -- 11:39 PM PDT     0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

12
am
1
am
2
am
3
am
4
am
5
am
6
am
7
am
8
am
9
am
10
am
11
am
12
pm
1
pm
2
pm
3
pm
4
pm
5
pm
6
pm
7
pm
8
pm
9
pm
10
pm
11
pm
0.30.50.70.80.70.40-0.4-0.7-1-1-0.7-0.30.10.511.21.210.80.40.1-0.1-0.1

Weather Map
       (on/off)   Help Weather Map
wmap_P
GEOS Local Image of CentralWestCoast    EDIT
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.
Link to Loop

Other links: GEOS-West     Contential US     Full GOES-East
Ground Weather Radar Station




Please read website Cookie, Privacy, and Disclamers by clicking HERE.