Friday, October18, 2019 L-36.com


Marine Weather and Tides
Hayward, CA

Version 3.4
NOTICE
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.
6/2/2019. Many thanks to a user for reporting an error on one of the Edit pages. The switch to PHP 7.2 caused many pages that previously worked to quit working. I fixed many but I still depend on users to report ones I missed. Please report errors HERE or send an email to me at L-36.com. Allen

Sunrise 7:18AMSunset 6:28PM Friday October 18, 2019 5:26 PM PDT (00:26 UTC) Moonrise 8:53PMMoonset 10:54AM Illumination 72% Phase: Waning Gibbous; Moon at 20 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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PZZ530 San Pablo Bay, Suisun Bay, The West Delta And The San Francisco Bay North Of The Bay Bridge- 229 Pm Pdt Fri Oct 18 2019
Rest of today..W winds 10 to 15 kt with gusts up to 25 kt.
Tonight..W winds 5 to 15 kt.
Sat..SW winds 5 to 15 kt.
Sat night..W winds 10 to 15 kt.
Sun..W winds 5 to 15 kt.
Sun night..W winds 5 to 10 kt.
Mon..NW winds up to 10 kt.
Tue..NW winds 5 to 15 kt.
PZZ500 229 Pm Pdt Fri Oct 18 2019
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Predominately light to locally moderate northwest winds the rest of today and through the weekend. The strongest winds will be concentrated along the big sur coast. The northwest swell will peak today and then begin to subside this evening with hazardous seas for smaller vessels continuing into this weekend.


7 Day Forecast for Marine Location Near Hayward, CA
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location: 37.62, -122.15     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
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Fxus66 kmtr 190008
afdmtr
area forecast discussion
national weather service san francisco bay area
508 pm pdt Fri oct 18 2019

Synopsis Today will be another cool day for the bay area
before another weak front moves through late this evening. Winds
will be breezy as the front passes and there is a slight chance of
rain with minimal accumulations for the north bay late tonight
into Saturday morning. Temperatures will gradually warm over the
weekend before a more robust warming trend early next week along
with offshore flow.

Discussion As of 1:39 pm pdt Friday... Under partly cloudy
skies, afternoon temperatures are running similar to those from 24
hours ago with readings in the mid 60s to the lower 70s. Satellite
imagery shows high clouds moving across the bay area southward, as
well as some cumulus forming over higher peaks, and coastal
stratus from marin county south to the monterey peninsula.

Tonight a weak frontal boundary is forecast to bring rain
chances to mainly the north bay overnight and into Saturday
morning. Only a few hundredths of an inch at most can be expected,
and mainly in the extreme northern portions of sonoma and napa
counties. In addition, the passing boundary could result in an
increase in offshore flow across the santa lucia mountains. These
winds are not forecast to be overly strong, but with low humidity
it raises the concerns for a fire threat (see fire discussion
below).

Onshore flow will persist Saturday and Sunday under a strong
northwest flow. 500 mb heights will slowly rise for gradually
warming temps over the weekend. By Monday, the upper level ridge
will continue to grow and shift eastward towards the coast,
initiating a much more substantial warming trend expected to last
through the middle of the week. High temps should level off by
Wednesday. However, while temperatures warm into the mid to upper
80s at the surface, the wind pattern shifts by Tuesday to a more
widespread, offshore pattern, increasing the potential for
possible fire weather issues through Thursday.

Aviation As of 5:05 pm pdt Friday... Moisture boundary that
brought clouds to the coast this morning are mostly dissipating
with a few CIGS lingering around mry. Models indicate the lower
level drying out this evening soVFR is expected tonight. The only
possible exception is mry where clouds could reform later. Both
hi-res and NAM models bring in another batch of low level moisture
Saturday morning after 15z so will have to watch for daytime
clouds low CIGS on Saturday.

Vicinity of ksfo...VFR through Saturday morning. Models indicate
an increase in low level moisture after 15z which could bring cigs
at or below 5000 ft. West winds to 20 kt gusting to 25 kt through
04z.

Sfo bridge approach... Similar to ksfo.

Monterey bay terminals... BecomingVFR as clouds clear away from
the bay. Small chance of ifr CIGS reforming near mry after 05z but
if it does it will burn off early Saturday morning. Both
hi-res and NAM models bring in another batch of low level moisture
Saturday morning after 18z so will have to watch for daytime
clouds low CIGS on Saturday.

Fire weather As of 3:05 pm pdt Friday... Two main fire weather
concerns over the next seven days. The first impact will be
focused tonight over the higher terrain of the santa lucia
mountains. Hi-res WRF model continues to show a localized
offshore flow scenario tonight with N to NE winds 25-35 mph with
poor humidity recovery. The second impact will be focused on next
week. High pressure is forecast to build starting Sunday Monday
and continue through much of the next week with a warming and
drying trend. More importantly, offshore flow is forecast to
develop on Monday and increase each day before peaking Wednesday
night Thursday morning. Latest GFS continues to show a robust
15mb+ sfo-wmc... That being said the ECMWF isn't as strong. None
the less, this situation next week needs watching. Even if the
strength of the wind doesn't verify rh will be low by night number
three. Stay tuned... .

Marine As of 04:49 pm pdt Friday... Predominately light to
locally moderate northwest winds the rest of today and through the
weekend. The strongest winds will be concentrated along the big
sur coast. The northwest swell will peak today and then begin to
subside this evening with hazardous seas for smaller vessels
continuing into this weekend.

Mtr watches warnings advisories
Tngt High surf advisory... Caz006-505-509-529-530
sca... Pigeon pt to pt pinos 0-10 nm
sca... Pt arena to pt reyes 0-10 nm
sca... Pt pinos to pt piedras blancas 0-10 nm
sca... Pt arena to pigeon pt 10-60 nm
sca... Pigeon pt to pt piedras blancas 10-60 nm
sca... Pt reyes to pigeon pt 0-10 nm until 3 am
sca... Rough bar advisory for sf bar until 3 am
public forecast: sims
aviation: W pi
marine: drp
fire weather: mm
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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 mi57 min WNW 13 G 16 63°F 65°F1019 hPa
AAMC1 - 9414750 - Alameda, CA 13 mi57 min W 9.9 G 14 62°F 62°F1018.3 hPa
LNDC1 14 mi57 min W 11 G 16 62°F 1017.7 hPa
OBXC1 16 mi57 min 60°F 55°F
OKXC1 - 9414776 - Oakland (Berth 34), CA 16 mi57 min W 13 G 16 60°F 1017.6 hPa
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 16 mi57 min W 13 G 17
PXOC1 - 9414311 - San Francisco (Pier 1), CA 18 mi63 min WSW 9.9 G 17 62°F 1017 hPa
PXSC1 18 mi57 min 62°F 54°F
FTPC1 - 9414290 - San Francisco, CA 21 mi57 min WSW 7 G 12 58°F 56°F1018.3 hPa
PPXC1 - 9414847 - Richmond (Point Potrero), CA 23 mi63 min SW 9.9 G 12 63°F 1017.8 hPa
RCMC1 - 9414863 - Richmond, CA 25 mi57 min NW 7 G 9.9 64°F 60°F1017.4 hPa
TIBC1 - Tiburon Pier, San Francisco Bay, CA 25 mi52 min SSW 7 62°F 1017 hPa
46237 - San Francisco Bar, CA (142) 28 mi57 min 55°F9 ft
UPBC1 29 mi57 min WNW 16 G 19
MZXC1 - 9415102 - Martinez-Amorco CA 29 mi57 min W 15 G 16 64°F 63°F1017.1 hPa
PCOC1 - 9415144 - Port Chicago, CA 31 mi57 min W 15 G 17 65°F 64°F1017.1 hPa
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 31 mi57 min W 9.9 G 13 65°F 1016.9 hPa
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 32 mi57 min NW 12 G 17 66°F 1016.5 hPa
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 38 mi37 min W 9.7 G 14 57°F 56°F10 ft1018.7 hPa
SFXC1 - San Francisco Bay Reserve, CA 41 mi102 min W 12 69°F 1017 hPa46°F

Wind History for Redwood City, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Hayward, Hayward Air Terminal, CA3 mi33 minW 1410.00 miFair64°F46°F54%1019 hPa
Oakland, Metro Oakland International Airport, CA7 mi34 minW 1710.00 miA Few Clouds65°F48°F56%1017.8 hPa
San Carlos Airport, CA8 mi97 minWNW 1310.00 miA Few Clouds66°F46°F49%1018.6 hPa
Palo Alto Airport, CA10 mi40 minNW 1310.00 miClear66°F44°F46%1018.3 hPa
San Francisco, San Francisco International Airport, CA11 mi31 minW 1810.00 miA Few Clouds and Breezy63°F48°F58%1017.9 hPa
Livermore, Livermore Municipal Airport, CA18 mi34 minW 1210.00 miFair64°F45°F50%1017.4 hPa
Half Moon Bay Airport, CA20 mi32 minNW 84.00 miFair with Haze59°F55°F88%1019 hPa
San Jose, San Jose International Airport, CA21 mi34 minNNW 1410.00 miA Few Clouds66°F50°F56%1017.9 hPa

Link to 5 minute data for KHWD

Wind History from HWD (wind in knots)
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Last 24hrW15W6W6NW7W8NW6SE4CalmCalmCalmCalmE4NE5NE3E3E4SE4CalmW8W11W11W13W13W14
1 day agoW7W5W4CalmCalmSW3SE3CalmCalmW6CalmW8W5NW3CalmW5W8W10W10W11W15W14
G21
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2 days agoW5NW8NW8W4CalmCalmNE3CalmCalmNE3CalmNE3NE3NE3CalmCalmCalm3Calm5W6W8W9W10

Tide / Current Tables for San Mateo Bridge (east end), San Francisco Bay, California
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San Mateo Bridge (east end)
Click for Map
Fri -- 04:40 AM PDT     6.16 feet High Tide
Fri -- 07:19 AM PDT     Sunrise
Fri -- 09:45 AM PDT     2.88 feet Low Tide
Fri -- 11:53 AM PDT     Moonset
Fri -- 03:26 PM PDT     7.34 feet High Tide
Fri -- 06:27 PM PDT     Sunset
Fri -- 09:53 PM PDT     Moonrise
Fri -- 10:44 PM PDT     0.12 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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1.734.35.466.15.64.73.732.93.44.45.56.67.37.36.75.542.41.10.30.1

Tide / Current Tables for Mulford Gardens Channel #2 SSW, South San Francisco Bay, California Current
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Mulford Gardens Channel #2 SSW
Click for Map
Fri -- 12:55 AM PDT     0.92 knots Max Flood
Fri -- 04:24 AM PDT     -0.00 knots Slack
Fri -- 06:50 AM PDT     -0.44 knots Max Ebb
Fri -- 07:19 AM PDT     Sunrise
Fri -- 09:17 AM PDT     0.00 knots Slack
Fri -- 11:54 AM PDT     Moonset
Fri -- 12:43 PM PDT     0.61 knots Max Flood
Fri -- 03:16 PM PDT     -0.01 knots Slack
Fri -- 06:27 PM PDT     Sunset
Fri -- 07:03 PM PDT     -0.83 knots Max Ebb
Fri -- 09:53 PM PDT     Moonrise
Fri -- 10:22 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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0.80.90.80.50.2-0.2-0.4-0.4-0.3-0.10.20.40.60.60.40.1-0.2-0.5-0.7-0.8-0.7-0.4-0.10.2

Weather Map
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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.
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Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for San Francisco/Monterey Bay Area, CA (20,4,5,8)
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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.