Sunday, July22, 2018 L-36.com


Marine Weather and Tides
Half Moon Bay, CA

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What's New / NOTES
7/21/2018 Trying to make page Mobile Friendly

Sunrise 6:04AMSunset 8:27PM Sunday July 22, 2018 5:35 AM PDT (12:35 UTC) Moonrise 3:25PMMoonset 1:14AM Illumination 71% Phase: Waxing Gibbous; Moon at 9 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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PZZ545 Point Reyes To Pigeon Point To 10 Nm- 222 Am Pdt Sun Jul 22 2018
Today..W winds 10 kt. Wind waves 2 ft or less...becoming 3 to 4 ft in the afternoon. NW swell 3 to 4 ft at 9 seconds and sw 3 ft at 17 seconds. Patchy fog in the morning.
Tonight..W winds 10 kt. Wind waves 3 to 5 ft. NW swell 2 to 4 ft at 9 seconds and sw 3 ft at 17 seconds. Patchy fog after midnight.
Mon..W winds 5 to 15 kt. Wind waves 1 to 3 ft. NW swell 2 to 3 ft at 8 seconds and sw 3 ft at 19 seconds. Patchy fog in the morning.
Mon night..W winds 5 to 15 kt. Wind waves 1 to 3 ft. NW swell 2 to 3 ft at 8 seconds and sw 3 to 5 ft at 21 seconds. Patchy fog after midnight.
Tue..W winds 5 to 15 kt. Wind waves 1 to 3 ft. Mixed swell nw 2 ft at 8 seconds and sw 3 to 5 ft at 18 seconds. Patchy fog in the morning. Patchy fog after midnight.
Wed..NW winds 5 to 15 kt. Wind waves 1 to 3 ft. Mixed swell nw 2 to 3 ft and sw 3 to 4 ft. Patchy fog.
Thu..NW winds 10 to 20 kt. Wind waves 2 to 4 ft. Mixed swell nw 2 ft and sw 3 ft. Patchy fog.
...san francisco bar/fourfathom bank forecast..... In the deep water channel...combined seas 2 to 4 ft with a dominant period of 10 seconds. Across the bar...combined seas 3 to 5 ft with a dominant period of 10 seconds. Maximum ebb current of 1.5 knots at 12:31 pm Sunday and 2.7 knots at 01:01 am Monday.
PZZ500 222 Am Pdt Sun Jul 22 2018
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Generally light winds will continue across the coastal waters through the rest of the weekend. Northwesterly winds will then increase through the coming week. Two long period southerly swells will impact the region with the first through the weekend and the second arriving early next week.

7 Day Forecast for Marine Location Near Half Moon Bay, CA
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location: 37.47, -122.48     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
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Fxus66 kmtr 221134
afdmtr
area forecast discussion
national weather service san francisco bay area
434 am pdt Sun jul 22 2018

Synopsis Seasonable conditions will remain in place through
Monday. High pressure will build over the region by midweek
bringing hot temperatures to interior areas and in the mountains.

Discussion As of 3:40 am pdt Sunday... The marine layer has
deepened somewhat to around 1800 feet, and coastal low clouds
appear to be spreading a little farther inland, per satellite
imagery. Similar or slightly cooler high temps are expected today
due to the slightly deeper marine layer and continued onshore
flow. Highs should range from the 60s to mid 70s at the coast, to
the 80s and 90s inland. Not much change is indicated for Monday as
conditions remain fairly similar.

By midweek an upper level ridge will build westward into
california from the four corners region which will initiate a
warming trend for the area. The areas expected to be most
affected will be southern and central california, but hot
temperatures are expected to edge into our area as well. In
addition, overnight low temperatures will remain warm in the
higher terrain, thus a heat advisory has been issued for the east
bay hills as well as the mountains of san benito and inland
monterey counties, and the southern salinas valley beginning
midday Tuesday and extending through Wednesday afternoon. The
ridge will begin to moderate on Thursday with slight cooling
expected for the end of the week.

Aviation As of 04:34 am pdt Sunday... For 12z tafs. Conditions
currently range fromVFR at klvk to lifr at kmry as stratus
remains along the coast and inland. Clearing expected this morning
around 17z for most areas. Once stratus clears,VFR conditions to
prevail through this evening when another early return is
forecast. Light to moderate onshore winds this afternoon.

Vicinity of ksfo... MVFR to ifr CIGS through around 16z-17z.

Confidence on clearing time is low. Westerly winds increasing this
afternoon to 15-20 kt.

Sfo bridge approach... Similar to sfo.

Monterey bay terminals... Ifr lifr CIGS through around 17z before
vfr conditions prevail. Early return of ifr CIGS is expected late
this afternoon early this evening. Generally light winds through
the period.

Marine As of 2:22 am pdt Sunday... Generally light winds will
continue across the coastal waters through the rest of the
weekend. Northwesterly winds will then increase through the coming
week. Two long period southerly swells will impact the region
with the first through the weekend and the second arriving early
next week.

Mtr watches warnings advisories
Tday Sca... Sf bay from 2 pm
public forecast: sims
aviation: as
marine: as
visit us at

Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
RTYC1 - 9414523 - Redwood City, CA 14 mi36 min NNE 1.9 G 2.9 75°F1018.2 hPa
PXOC1 - 9414311 - San Francisco (Pier 1), CA 23 mi36 min W 4.1 G 8 1016.8 hPa
FTPC1 - 9414290 - San Francisco, CA 23 mi42 min SSW 5.1 G 8 60°F 63°F1018 hPa
AAMC1 - 9414750 - Alameda, CA 23 mi42 min W 7 G 8.9 61°F 71°F1018 hPa
46237 - San Francisco Bar, CA (142) 23 mi66 min 61°F3 ft
46012 - HALF MOON BAY - 24NM South Southwest of San Francisco, CA 23 mi46 min SSW 1.9 G 3.9 60°F 60°F5 ft1018.3 hPa (+0.0)
PXSC1 23 mi42 min 61°F 60°F
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 24 mi36 min WSW 9.9 G 12
OBXC1 24 mi36 min 60°F 60°F
LNDC1 25 mi36 min W 4.1 G 7 1017.8 hPa (+0.3)
OKXC1 - 9414776 - Oakland (Berth 34), CA 25 mi36 min W 6 G 8 60°F 1017.8 hPa (+0.0)
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 27 mi36 min WSW 1.9 G 3.9 60°F 59°F1018.4 hPa (+0.0)
PPXC1 - 9414847 - Richmond (Point Potrero), CA 31 mi36 min WSW 7 G 9.9 62°F 1018 hPa (+0.4)
RCMC1 - 9414863 - Richmond, CA 32 mi42 min SW 6 G 8.9 61°F 65°F1017.6 hPa
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 42 mi36 min SW 12 G 16 62°F 1016.9 hPa (+0.4)
MZXC1 - 9415102 - Martinez-Amorco CA 43 mi36 min W 15 G 18 69°F1017 hPa
PRYC1 - 9415020 - Point Reyes, CA 45 mi36 min W 1.9 G 2.9 62°F1017.5 hPa (+0.0)
PCOC1 - 9415144 - Port Chicago, CA 47 mi36 min WSW 16 G 19 69°F1016.7 hPa (+0.5)
46042 - MONTEREY - 27NM West of Monterey Bay, CA 48 mi46 min WNW 1.9 G 3.9 59°F 61°F4 ft1017.6 hPa (+0.0)

Wind History for Redwood City, CA
(wind in knots)    EDIT      (on/off)   Help
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Half Moon Bay Airport, CA3 mi41 minS 41.00 miFog/Mist59°F57°F94%1018.3 hPa
San Francisco, San Francisco International Airport, CA12 mi40 minW 610.00 miMostly Cloudy60°F55°F86%1017.5 hPa
San Carlos Airport, CA13 mi41 minWNW 310.00 miOvercast63°F57°F83%1017.6 hPa
Oakland, Metro Oakland International Airport, CA21 mi43 minW 910.00 miOvercast61°F57°F90%1017.7 hPa
Mountain View, Moffett Field, CA23 mi40 minN 510.00 miOvercast62°F60°F93%1018.1 hPa
Hayward, Hayward Air Terminal, CA23 mi42 minNNW 610.00 miOvercast63°F57°F81%1018.5 hPa

Wind History from SFO (wind in knots)
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Last 24hrNW4NW3CalmNE5N7N8N7NW13NW16W18W21W21W19W14W16W13W16W11NW11W10W10W8W8W6
1 day agoCalmW4CalmNE6N7NE8N8N8N8CalmS8S145NW11NW13NW11NW11NW12NW10NW8NW7NW7NW7W5
2 days agoW4S3CalmNE3NE5N7N9N9NW16NW16NW15NW16
G22
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Tide / Current Tables for Half Moon Bay, California
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Half Moon Bay
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Sun -- 02:00 AM PDT     0.51 feet Low Tide
Sun -- 02:14 AM PDT     Moonset
Sun -- 06:06 AM PDT     Sunrise
Sun -- 08:32 AM PDT     3.81 feet High Tide
Sun -- 01:23 PM PDT     2.43 feet Low Tide
Sun -- 04:24 PM PDT     Moonrise
Sun -- 07:36 PM PDT     5.78 feet High Tide
Sun -- 08:26 PM PDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
1.30.70.50.71.21.92.73.43.83.83.53.12.72.42.52.93.64.45.25.75.75.34.43.2

Tide / Current Tables for San Mateo Bridge, South San Francisco Bay, California Current
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San Mateo Bridge
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Sun -- 01:19 AM PDT     -1.42 knots Max Ebb
Sun -- 02:13 AM PDT     Moonset
Sun -- 04:53 AM PDT     0.00 knots Slack
Sun -- 06:04 AM PDT     Sunrise
Sun -- 07:54 AM PDT     1.39 knots Max Flood
Sun -- 11:02 AM PDT     -0.00 knots Slack
Sun -- 02:03 PM PDT     -0.67 knots Max Ebb
Sun -- 04:23 PM PDT     Moonrise
Sun -- 04:39 PM PDT     0.00 knots Slack
Sun -- 07:30 PM PDT     1.17 knots Max Flood
Sun -- 08:25 PM PDT     Sunset
Sun -- 10:29 PM PDT     -0.01 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
-1.3-1.4-1.4-1.2-0.60.10.81.31.41.20.70-0.4-0.6-0.7-0.6-0.30.20.81.11.10.90.4-0.3

Weather Map and Satellite Images
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wmap_P
GOES 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.
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Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for San Francisco/Monterey Bay Area, CA (8,2,3,4)
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Ground Weather Radar Station San Francisco Bay Area, CA
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Disclaimer:
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 numerious 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.