Monday, March27, 2017 L-36.com


Marine Weather and Tides
Hercules, CA

Version 3.4
What's New / NOTES
5/19/2016 - There were issues with the 3 day airport observation history. I switched to another data source. Let me know if you see any issues with the data feeds.
3/12/2015 - Added section for Gulf current for users in the GMZ marine zones.
This was requested by a user. If you have requests, please let me know.

Sunrise 6:58AMSunset 7:29PM Monday March 27, 2017 3:28 PM PDT (22:28 UTC) Moonrise 5:59AMMoonset 6:17PM Illumination 0% Phase: New Moon; Moon at 0 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 San Francisco Bay North Of The Bay Bridge- 229 Pm Pdt Mon Mar 27 2017
.small craft advisory in effect until 9 pm pdt this evening...
Tonight..NW winds 15 to 25 kt...decreasing to 5 to 15 kt after midnight.
Tue..NW winds 5 to 15 kt.
Tue night..W winds 5 to 15 kt.
Wed..W winds 10 kt.
Wed night..W winds 5 to 15 kt.
Thu..NW winds 10 to 20 kt.
Fri..N winds 10 to 20 kt.
Sat..NE winds 10 kt...becoming west.
PZZ500 229 Pm Pdt Mon Mar 27 2017
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Moderate and gusty northwest winds will persist through midweek as a strong surface pressure gradient builds over the region. In addition, a building northwest swell will move through the coastal waters through late week. Moderate to gusty northwest winds will then likely continue through late week.

7 Day Forecast for Marine Location Near Hercules, CA
   Hourly   EDIT   Help
location: 38.02, -122.29     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
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Fxus66 kmtr 272026
afdmtr
area forecast discussion
national weather service san francisco bay area
126 pm pdt Mon mar 27 2017

Synopsis Breezy conditions will continue tonight as a ridge of
high pressure builds into our region. Slightly cooler conditions
are expected on Thursday as a weather system moves into eastern
california and nevada. That weather system will bring only a
slight chance of showers to the northern and eastern portions of
our area, and also result in blustery conditions near the coast
and in the hills by late Thursday. High pressure will redevelop
late in the week and result in warmer weather once again by the
weekend.

Discussion As of 1:30 pm pdt Monday... Outside of some fair
weather cumulus that have popped up along terrain, mostly sunny
conditions across our cwa. Main story has been the winds as a
moderate surface gradient (acv to sfo now 2.4 mb and sfo to las is
over 15) has lead to breezy northwesterly winds. Current
observations indicate gusts of 15 to 25 mph in many location with
a few spots over 30 mph. Winds will continue through the evening
before dissipating overnight.

Synoptically a ridge of high pressure will build into our region
over the next couple of days. This will lead to dry weather along
with warmer temperatures. Highs will return to the mid 60s to
upper 70s on Wednesday with a few lower 80s possible in monterey
county
an inside slider will dive down across nevada on Thursday and to
the four corners region on Friday. Although the track will keep
almost all of the showers to our east, there remains a slight
chance a few could hit the north and east bay hills on Thursday.

The bigger impact will be to bring another round of cooler weather
plus breezy northwesterly winds. Both the NAM and ECMWF bring the
strongest winds to the coast and offshore locations while inland
areas have lower values. Right now wind advisories look unlikely
expect for potentially along the coast and coastal ranges.

Temperatures will be 5 to 10 degrees cooler for our entire region
compared to Wednesday.

The ridge will rebuild Friday into Saturday which will lead to
temperatures retuning back to near normal values. That should hold
through at least the first part of next week.

Finally, CPC 8 to 14 day forecast does show normal to above normal
rainfall for our region. We will have to keep a close an eye on
the longer range guidance. Winter may not be done yet!

Aviation As of 10:45 am pdt Monday... For 18z tafs. West to
northwest winds will continue to increase through late morning and
become gusty at times through the afternoon. With this flow,
few/sct clouds will likely remain over or in the vicnity of the
terminals as well. However,VFR conditions are likely through the
forecast period. Wind speeds diminish late this evening and into
the overnight before increasing once again late Tuesday
morning/afternoon.

Vicinity of ksfo...VFR. ExpectingVFR conditions to prevail with
winds becoming gusty later this morning and persisting through the
afternoon. Gusts in excess of 25 kts will be likely.

Sfo bridge approach... Similar to ksfo.

Monterey bay terminals...VFR. ExpectingVFR conditions to prevail
with increased northwesterly winds this afternoon. Wind gusts of
20 to 25 kts will be possible at times through the afternoon and
then diminish late in the evening/overnight.

Marine As of 10:45 am pdt Monday... Northwest winds will
increase this afternoon and persist through midweek as a strong
surface pressure gradient builds over the region. In addition, a
building northwest swell will move through the coastal waters
through midweek. Moderate to gusty northwest winds will then
likely continue through late week.

Mtr watches/warnings/advisories
Tday Sca... Pt arena to pt reyes 0-10 nm
sca... Pt reyes to pigeon pt 0-10 nm
sca... Pigeon pt to pt pinos 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... Mry bay
sca... Sf bay
public forecast: bell
aviation: rgass
marine: rgass
visit us at

Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 3 mi41 min WNW 13 G 17 60°F 1023.1 hPa
PPXC1 - 9414847 - Richmond (Point Potrero), CA 9 mi41 min WNW 12 G 14 62°F 1023.7 hPa
MZXC1 - 9415102 - Martinez-Amorco CA 9 mi41 min W 20 G 23 60°F 57°F1023.2 hPa45°F
UPBC1 9 mi41 min WNW 22 G 25
RCMC1 - 9414863 - Richmond, CA 9 mi41 min NW 13 G 16
PCOC1 - 9415144 - Port Chicago, CA 14 mi41 min W 11 G 15 61°F 57°F1022.8 hPa
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 15 mi41 min NW 11 G 15
OKXC1 - 9414776 - Oakland (Berth 34), CA 15 mi41 min NNW 12 G 15 59°F 1023.9 hPa
OBXC1 15 mi41 min 60°F 46°F
PXSC1 16 mi41 min 59°F 46°F
LNDC1 16 mi59 min NW 6 G 12 60°F 1023.9 hPa
FTPC1 - 9414290 - San Francisco, CA 17 mi41 min W 14 G 20
AAMC1 - 9414750 - Alameda, CA 17 mi41 min W 8 G 14 60°F 58°F1024.1 hPa
SFXC1 - San Francisco Bay Reserve, CA 19 mi104 min NW 8 65°F 1023 hPa45°F
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 21 mi41 min NW 7 G 9.9 62°F 1022.9 hPa
46237 - San Francisco Bar, CA (142) 24 mi59 min 56°F8 ft
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 34 mi39 min NW 21 G 27 54°F 56°F8 ft1024.6 hPa (+0.0)
RTYC1 - 9414523 - Redwood City, CA 36 mi41 min W 16 G 20 58°F 60°F1023.8 hPa

Wind History for Union Pacific Rail Road Bridge (UPRR), CA
(wind in knots)    EDIT      (on/off)   Help
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Concord, Buchanan Field, CA13 mi36 minWNW 13 G 2110.00 miMostly Cloudy65°F44°F47%1021.5 hPa
Napa, Napa County Airport, CA13 mi35 minWNW 1310.00 miMostly Cloudy64°F43°F46%1021.9 hPa
Novato / Gnoss Field, CA16 mi54 minW 9 G 1810.00 miFair63°F48°F60%1024 hPa
Oakland, Metro Oakland International Airport, CA22 mi36 minWNW 1710.00 miPartly Cloudy65°F48°F54%1023.6 hPa

Wind History from APC (wind in knots)
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Last 24hrSW12SW13SW14SW13S12W11
G19
W15W11W11W9W8W8W8W8NW4CalmW3N53CalmCalmNW11NW13
G30
W13
1 day agoSW8W13W15W11W13W14W10W7W10W5W4W4W8W4W6SW3CalmSW3CalmCalmS7S7SW10SW10
2 days agoS11S7S8SE5SE4E3SE3CalmCalmW5NW3CalmNW3CalmCalmCalmCalmCalmS33SW6SW6S8SW9

Tide / Current Tables for Hercules, Refugio Landing, San Pablo Bay, California
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Hercules
Click for Map
Mon -- 01:06 AM PDT     6.10 feet High Tide
Mon -- 06:59 AM PDT     Moonrise
Mon -- 07:01 AM PDT     Sunrise
Mon -- 07:24 AM PDT     0.87 feet Low Tide
Mon -- 01:07 PM PDT     6.33 feet High Tide
Mon -- 07:17 PM PDT     Moonset
Mon -- 07:28 PM PDT     Sunset
Mon -- 07:40 PM PDT     0.18 feet Low Tide
Mon -- 07:59 PM PDT     New Moon
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
5.66.15.853.82.51.50.911.93.24.65.86.36.15.23.92.41.10.30.212.33.8

Tide / Current Tables for Davis Point, California Current
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Davis Point
Click for Map
Mon -- 02:33 AM PDT     -0.00 knots Slack
Mon -- 06:32 AM PDT     -1.80 knots Max Ebb
Mon -- 06:59 AM PDT     Moonrise
Mon -- 07:01 AM PDT     Sunrise
Mon -- 09:11 AM PDT     0.00 knots Slack
Mon -- 11:27 AM PDT     1.67 knots Max Flood
Mon -- 02:34 PM PDT     -0.00 knots Slack
Mon -- 06:34 PM PDT     -1.90 knots Max Ebb
Mon -- 07:17 PM PDT     Moonset
Mon -- 07:28 PM PDT     Sunset
Mon -- 07:59 PM PDT     New Moon
Mon -- 09:24 PM PDT     0.00 knots Slack
Mon -- 11:44 PM PDT     1.85 knots Max Flood
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
1.510.4-0.3-0.9-1.4-1.7-1.8-1.3-0.20.91.61.61.10.4-0.3-1-1.6-1.9-1.9-1.5-0.50.71.6

Weather Map and Satellite Images
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Weather Map
wmap_P
IR Satellite Image from GEOS
west_satellite

GOES Local Image of CentralWestCoast    EDIT
Geos

Wind Forecast for San Francisco/Monterey Bay Area, CA (18,4,5,8)
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Ground Weather Radar Station Sacramento, CA
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weather_mapweather_map weather_map

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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.