Monday, August19, 2019 L-36.com


Marine Weather and Tides
Hercules, CA

Version 3.4
NOTICE
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 6:26AMSunset 7:59PM Monday August 19, 2019 2:23 PM PDT (21:23 UTC) Moonrise 9:25PMMoonset 9:11AM Illumination 82% Phase: Waning Gibbous; Moon at 19 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
PZZ530 San Pablo Bay, Suisun Bay, The West Delta And The San Francisco Bay North Of The Bay Bridge- 213 Pm Pdt Mon Aug 19 2019
.small craft advisory in effect from Tuesday afternoon through Tuesday evening...
Rest of today..SW winds 15 to 20 kt with gusts up to 25 kt.
Tonight..SW winds 10 to 15 kt.
Tue..SW winds 5 to 15 kt...increasing to 15 to 20 kt with gusts up to 30 kt in the afternoon.
Tue night..SW winds 10 to 15 kt.
Wed..SW winds 10 to 15 kt.
Wed night..W winds 10 to 15 kt.
Thu..SW winds 15 to 25 kt with gusts up to 30 kt.
Fri..SW winds 15 to 20 kt.
PZZ500 213 Pm Pdt Mon Aug 19 2019
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Generally light to moderate northwesterly winds will persist over the coastal waters through mid-week as high pressure off the california coast weakens and a surface low develops offshore of the pacific northwest. Locally gusty winds are expected to develop late tonight along the big sur coast south of point sur. Breezy winds are also forecast for tomorrow afternoon and evening over the inner coastal waters from pigeon point to point pinos, over the northern san francisco bay around the golden gate and through the delta, and over the Monterey bay. Mixed seas will continue with shorter period northwest waves at around 8 to 10 seconds, a light longer period west swell, and a light southerly swell.


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
      (on/off)   Help   NOTE: mouseover dotted underlined text for definition
Fxus66 kmtr 192051
afdmtr
area forecast discussion
national weather service san francisco bay area
151 pm pdt Mon aug 19 2019

Synopsis A deep marine layer will prevail through today,
maintaining widespread morning low clouds and cooler than normal
inland temperatures. Warmer temperatures will develop by midweek
and continue through the upcoming weekend as high pressure
rebuilds.

Discussion As of 1:52 pm pdt Monday... The deep marine layer
has prevented the usual mid-day clearing across parts of the san
francisco bay area and central california coast. As of 1 pm pdt,
monterey, san francisco, and oakland airports were all still
reporting overcast skies. While the slow and gradual clearing
trend is expected to continue as the afternoon progresses, some
locations along the immediate pacific coast may not see the sun
shine at all today. The clouds are influencing temperature trends
this afternoon as most airports are running about 2 to 7 degrees
cooler than 24 hours ago. By the time the afternoon concludes,
high temperatures will reach the 60s along the immediate coast and
70s to 80s for inland locations. The low clouds are expected to
return again tonight with the chance of some light drizzle along
the pacific coast.

Synoptically, an upper level ridge presently centered over the
southern plains is forecast to build and broaden westward towards
the desert southwest and baja california over the next several
days. This will result in a gradual compression of the marine
layer by the middle of the week. Additionally, a noticeable
warming trend will take place through at least mid-week with the
most significant day-to-day warm-up occurring from Tuesday to
Wednesday. Low 90s will become increasingly more likely on
Wednesday across some of the region's typical hot spots such as
king city, gilroy, livermore, and even santa rosa. Can't rule out
some rural far-inland locations approaching the upper 90s low
100s, but at this point don't think last the MAX temperatures
achieved last week will be repeated this week for the core
population centers.

Forecast guidance shows an upper level trough approaching the
pacific northwest on Wednesday and Thursday with some
precipitation potential for parts of oregon and washington state.

While the san francisco bay area will be well south of any
precipitation chances, the positioning of this trough will help
prevent additional warming for our region. The current forecast by
late week and into the weekend calls for forecast highs to
generally fall within a several degrees of normal along the coast
with inland locations at or slightly above normal.

As mentioned in the previous overnight discussion, models are
suggesting the potential for an uptick in tropical activity well
to our south along the baja california coast by the weekend and
into early next week. There still remains plenty of uncertainty
this far out, but will have to keep tabs on any development as
northbound moisture transport to parts of the southern california
coast and possibly even the central california coast isn't
completely out of the question by early next week.

Aviation As of 10:36 am pdt Monday... For 18z tafs. The marine
layer is still fairly deep at around 2500 ft agl per the fort ord
profiler. Satellite imagery shows stratus remains over much of
the region this morning, but is finally beginning to dissipate.

Vfr conditions to prevail by this afternoon with clearing
currently expected between 18z-20z. MVFR to ifr CIGS to return
this evening and prevail again overnight for most sites.VFR
conditions will last later into the evening for more inland
locations. W to SW winds this morning increasing this afternoon to
10-15 kt with locally higher gusts at ksfo.

Vicinity of ksfo... MVFR CIGS to continue until around 19z-20z.VFR
conditions expected this afternoon with models showing an earlier
return of MVFR CIGS this evening. SW to W winds around 10 kt this
morning increasing to 15 kt this afternoon with gusts 20-25 kt
after around 20z-21z.

Sfo bridge approach... Similar to ksfo.

Monterey bay terminals... MVFR ceilings until 18z-20z. Satellite
shows a decent feed of stratus into the peninsula. It is possible
that MVFR CIGS could linger around kmry longer than currently
forecast. Will keep an eye on satellite obs and update the TAF as
needed. Light winds this morning turning onshore in the afternoon
and increasing to 10-15 kt.VFR conditions expected in the
afternoon before MVFR CIGS return early to mid evening and for the
overnight hours.

Marine As of 8:12 am pdt Monday... Generally light winds today
and tonight across the coastal waters as high pressure off the
california coast weakens and a surface low develops offshore of
the pacific northwest. Locally gusty winds are expected later
today and into tomorrow over the inner coastal waters south of
point sur. Mixed seas will continue with shorter period northwest
waves at around 8 to 10 seconds, a light longer period west swell,
and a light southerly swell.

Mtr watches warnings advisories
Tngt Sca... Pt pinos to pt piedras blancas 0-10 nm from 3 am
public forecast: rowe
aviation: as
marine: as
visit us at

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
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 3 mi54 min WSW 14 G 16 65°F 1014.5 hPa
UPBC1 9 mi54 min W 13 G 16
MZXC1 - 9415102 - Martinez-Amorco CA 9 mi54 min W 13 G 14 69°F 73°F1014.3 hPa
RCMC1 - 9414863 - Richmond, CA 9 mi54 min 66°F
PPXC1 - 9414847 - Richmond (Point Potrero), CA 9 mi54 min SSW 9.9 G 13 63°F 1015.8 hPa
TIBC1 - Tiburon Pier, San Francisco Bay, CA 12 mi73 min S 12 62°F 1016 hPa
PCOC1 - 9415144 - Port Chicago, CA 14 mi54 min W 14 G 18 70°F 72°F1014.2 hPa
OBXC1 15 mi54 min 63°F 60°F
OKXC1 - 9414776 - Oakland (Berth 34), CA 15 mi54 min W 4.1 G 5.1 64°F 1015.6 hPa
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 15 mi54 min SSW 5.1 G 6
LNDC1 16 mi54 min SW 6 G 8.9 64°F 1015.6 hPa
PXOC1 - 9414311 - San Francisco (Pier 1), CA 16 mi54 min SE 1.9 G 5.1 64°F 1014.7 hPa
PXSC1 16 mi54 min 65°F 58°F
FTPC1 - 9414290 - San Francisco, CA 17 mi60 min SW 9.9 G 13 62°F 62°F1015.9 hPa
AAMC1 - 9414750 - Alameda, CA 17 mi60 min WSW 6 G 8 64°F 70°F1016.2 hPa
SFXC1 - San Francisco Bay Reserve, CA 19 mi99 min W 9.9 71°F 1014 hPa60°F
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 21 mi54 min WNW 11 G 16 74°F 1013.6 hPa
46237 - San Francisco Bar, CA (142) 24 mi54 min 60°F3 ft
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 34 mi24 min W 7.8 G 9.7 59°F 58°F1016.6 hPa (+0.0)
PRYC1 - 9415020 - Point Reyes, CA 36 mi54 min 61°F1015.6 hPa
RTYC1 - 9414523 - Redwood City, CA 36 mi54 min W 12 G 18 68°F 76°F1015.9 hPa

Wind History for Point Potrero Richmond, CA
(wind in knots)    EDIT      (on/off)   Help
2
PM
3
PM
4
PM
-12
PM
-12
PM
-12
PM
-12
PM
9
PM
10
PM
11
PM
-12
PM
-12
PM
2
AM
3
AM
-12
PM
5
AM
6
AM
-12
PM
8
AM
9
AM
-12
PM
11
AM
12
PM
1
PM
Last
24hr
SW15
G20
W14
G21
SW19
G25
SW10
G20
SW12
G18
SW14
G17
SW11
G14
SW12
G15
SW9
SW7
G11
S5
G9
SW6
SW7
G11
SW9
G12
S10
1 day
ago
SW17
G22
SW24
SW21
G27
SW17
G24
SW17
G22
SW17
G22
SW17
G22
SW15
G19
SW17
SW13
G17
W7
W4
W5
SW4
W3
W5
W5
G8
W6
W9
G12
SW13
G18
2 days
ago
S7
G11
S12
S15
SW11
G15
SW11
G17
SW17
SW20
SW21
SW17
G22
SW18
G24
SW11
G15
SW7
G10
SW7
G12
SW12
G17
SW11
G16
SW14
G20

Airport Reports
    EDIT      (on/off)   Help   Click EDIT to display multiple airports. Follow links for more data.
AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Concord, Buchanan Field, CA13 mi31 minS 1310.00 miFair76°F55°F48%1013 hPa
Napa, Napa County Airport, CA13 mi30 minSSW 910.00 miMostly Cloudy71°F57°F63%1014 hPa
Novato / Gnoss Field, CA16 mi29 minE 610.00 miFair73°F59°F61%1014.6 hPa
Oakland, Metro Oakland International Airport, CA22 mi31 minW 810.00 miPartly Cloudy70°F55°F61%1015.6 hPa
Petaluma Municipal Airport, CA23 mi29 minN 010.00 miFair75°F59°F57%1014.6 hPa

Link to 5 minute data for KCCR

Wind History from CCR (wind in knots)
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
2
PM
Last 24hrW14W13W13W13W13W9--W7--SW7----SW13W10
G19
SW10SW9SW9--SW11SW10SW9SW9--S13
1 day agoW12W13SW6SW10
G14
S14W7SW6SW6SW9SW9--W3W6W3SW6----SW9SW86SW6NW11
G17
NW125
2 days ago--W9W12--SW10W13------SW11W7--W4W5W4--W4W5SW9SW10SW10SW12SW10
G18
W12

Tide / Current Tables for Hercules, Refugio Landing, San Pablo Bay, California
   EDIT   Weekend mode (on/off)   (on/off)   Help   One Week of Data
Hercules
Click for Map
Mon -- 03:19 AM PDT     5.74 feet High Tide
Mon -- 06:27 AM PDT     Sunrise
Mon -- 10:10 AM PDT     Moonset
Mon -- 10:11 AM PDT     0.83 feet Low Tide
Mon -- 04:21 PM PDT     5.76 feet High Tide
Mon -- 07:57 PM PDT     Sunset
Mon -- 10:24 PM PDT     Moonrise
Mon -- 10:40 PM PDT     2.11 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
3.34.35.25.75.65.14.2321.20.81.11.834.25.25.75.75.24.33.42.72.22.1

Tide / Current Tables for Davis Point, California Current
   EDIT      (on/off)   Help   One Week of Data
Davis Point
Click for Map
Mon -- 02:01 AM PDT     1.37 knots Max Flood
Mon -- 04:44 AM PDT     -0.00 knots Slack
Mon -- 06:27 AM PDT     Sunrise
Mon -- 08:55 AM PDT     -1.88 knots Max Ebb
Mon -- 10:10 AM PDT     Moonset
Mon -- 12:08 PM PDT     0.00 knots Slack
Mon -- 02:29 PM PDT     1.73 knots Max Flood
Mon -- 05:50 PM PDT     -0.00 knots Slack
Mon -- 07:57 PM PDT     Sunset
Mon -- 09:45 PM PDT     -1.40 knots Max Ebb
Mon -- 10:24 PM PDT     Moonrise
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
0.211.41.10.5-0.2-0.8-1.4-1.8-1.9-1.7-1.1-0.20.91.61.61.20.5-0.1-0.7-1.1-1.3-1.4-1.2

Weather Map and Satellite Images
       (on/off)   HelpWeather Map
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.
Link to Loop

Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for San Francisco/Monterey Bay Area, CA (17,4,5,8)
      (on/off)   Help

Ground Weather Radar Station Sacramento, CA
   (on/off)   Help
weather_mapweather_map weather_map

Ad by Google

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.