Saturday, July20, 2019 L-36.com


Marine Weather and Tides
Twin Lakes, CA

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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 6:02AMSunset 8:26PM Saturday July 20, 2019 3:48 PM PDT (22:48 UTC) Moonrise 9:59PMMoonset 8:29AM Illumination 85% 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
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PZZ535 Monterey Bay- 213 Pm Pdt Sat Jul 20 2019
Rest of today..W winds 5 to 10 kt. Wind waves 2 ft or less. W swell 2 to 4 ft at 10 seconds.
Tonight..W winds 5 to 10 kt. Wind waves 2 ft or less. NW swell 2 to 4 ft at 9 seconds.
Sun..W winds 10 to 15 kt. Wind waves 2 ft or less. NW swell 2 to 4 ft at 9 seconds.
Sun night..W winds 5 to 10 kt. Wind waves 2 ft or less. NW swell 2 to 4 ft at 9 seconds.
Mon..W winds 10 to 15 kt. Wind waves 2 ft or less. NW swell 2 to 4 ft at 9 seconds.
Mon night..W winds 5 to 10 kt. Wind waves 2 ft or less. NW swell 2 to 4 ft at 8 seconds.
Tue..W winds 15 to 20 kt with gusts up to 25 kt. Wind waves 3 to 4 ft. NW swell 3 to 5 ft.
Wed..NW winds 10 to 15 kt. Wind waves 2 ft or less. NW swell 2 to 4 ft. Locally lower winds and seas across sheltered portions of the bay.
PZZ500 213 Pm Pdt Sat Jul 20 2019
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Light southerly flow along the coast and northwesterly winds over the outer waters will persist through tomorrow. Locally gusty winds will continue today across the northern outer waters and over the northern san francisco bay. Winds will shift back out of the northwest on Sunday.


7 Day Forecast for Marine Location Near Twin Lakes CDP, CA
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location: 36.83, -122.01     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
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Fxus66 kmtr 202059
afdmtr
area forecast discussion
national weather service san francisco bay area
159 pm pdt Sat jul 20 2019

Synopsis A deep marine layer will maintain cooler than average
temperatures today, especially inland. A warming trend will begin
on Sunday and continue through the middle of next week as high
pressure centered over the four corners area builds westward into
california.

Discussion As of 02:00 pm pdt Saturday... A weakening coastal
trough is continuing to bring southerly flow along the coast this
afternoon. This has prevented clouds from fully clearing out of
parts of sonoma and marin counties but expect clouds to continue
decreasing early this afternoon. Elsewhere, stratus has retreated
to the coast with mostly sunny skies. Temperatures are down
several degrees versus 24 hours ago at most locations due to
clouds lingering into the late morning and early afternoon. The
biggest decrease in temperatures are in the north bay, east bay,
and south bay where temps are as much as 5-10 degrees below this
time yesterday. This will result in highs several degrees below
yesterday's observed highs in these locations. Elsewhere, high
temperatures will be similar to yesterday.

Northwesterly flow is expected to replace southerly flow along the
coast over the next 24 hours as the offshore surface trough
weakens. An upper ridge will develop over the four corners region
on Sunday and begin to expand northwestward over california
through next week. This will act to compress the marine layer,
and less inland intrusion of stratus can be expected in the coming
days. The building ridge will also begin a warming trend that
will last through the middle of next week. 850 mb temperatures
will begin at about 20c today and are forecast to warm
approximately a degree c each day Sunday through Wednesday. Most
of the warming at the surface will be felt at inland locations,
with highs rising a few degrees each day. Inland valleys are
expected to reach the 80s and 90s, with the hottest locations
reaching the upper 90s to lower 100s by the middle of next week,
an upper trough will move off the coast early next week and will
prevent the ridge from building more strongly across california.

Cool onshore flow is expected to prevail, and only slight warming
is expected at coastal locations. Coastal highs through next week
are forecast to remain in the 60s and 70s.

Late next week, ensembles depict the upper trough lifting to the
north and the four corners high gradually shifting westward,
becoming centered over the desert southwest next weekend. This
would result in further warming of inland areas, while continued
onshore flow keeps coastal areas cool.

Aviation As of 10:28 am pdt Saturday... For 18z tafs. A marine
layer in excess of 2500 ft has led to more widespread stratus
coverage with both ksjc and klvk seeing bkn CIGS into this
morning. Satellite imagery shows low clouds dissipating over land.

Vfr conditions expected for this afternoon before MVFR ifr cigs
return this evening. Generally light winds this morning becoming
onshore and breezy this afternoon 10-15 kt with locally higher
gusts at ksfo.

Vicinity of ksfo...VFR conditions prevailing before stratus
returns this evening. Light southerly winds this morning to turn
onshore by the afternoon. Expect westerly winds gusting to 20-25
kt after 21z-22z.

Sfo bridge approach... Similar to ksfo.

Monterey bay terminals... Satellite imagery shows stratus clearing
towards the bay. May see MVFR CIGS hang on at kmry until 19z-20z.

Vfr conditions this afternoon before low clouds return early this
evening. Generally light winds this morning turning onshore and
increasing to 10-15 kt this afternoon.

Marine As of 08:18 am pdt Saturday... Split flow will continue
today and tomorrow with light southerly winds along the coast and
more moderate northwest winds over the outer waters. Locally gusty
winds will continue today across the northern outer waters and
over the northern san francisco bay. Winds will shift back out of
the northwest Sunday.

Mtr watches warnings advisories
Tngt Sca... Pt arena to pigeon pt 10-60 nm until 3 am
sca... Sf bay until 9 pm
public forecast: st
aviation: as
marine: as
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Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
46092 - MBM1 6 mi36 min SW 7.8 58°F 57°F1014.3 hPa (-0.9)
MLSC1 - Moss Landing, South Harbor, CA 12 mi85 min W 7 G 19 63°F 1014.7 hPa56°F
ELXC1 - Elkhorn Slough Reserve, CA 14 mi64 min WNW 7 67°F 1015 hPa57°F
46240 - Cabrillo Point, Monterey Bay, CA (158) 15 mi49 min 57°F3 ft
MEYC1 17 mi73 min 58°F1014.3 hPa
46114 - West Monterey Bay, CA 20 mi49 min 61°F6 ft
46042 - MONTEREY - 27NM West of Monterey Bay, CA 21 mi59 min S 3.9 G 5.8 59°F 60°F6 ft1014 hPa (-0.9)
46239 - Point Sur, CA (157) 34 mi49 min 60°F6 ft
RTYC1 - 9414523 - Redwood City, CA 48 mi49 min WNW 11 G 14 70°F 74°F1013.2 hPa (-1.4)

Wind History for Monterey, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Watsonville, Watsonville Municipal Airport, CA14 mi56 minWSW 1210.00 miFair69°F54°F59%1014.2 hPa
Monterey Regional Airport, CA19 mi55 minW 1110.00 miFair70°F53°F55%1015.4 hPa
Salinas, Salinas Municipal Airport, CA24 mi56 minNW 1110.00 miFair70°F54°F57%1014.6 hPa

Wind History from WVI (wind in knots)
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Last 24hrW9SW8W7W7W6W5W3CalmW3W3W4W4W5W5W4W4W5W44SW7W9W11W9
G16
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1 day agoSW8SW9W7W5SW4SW3SW3CalmCalmS4SE3CalmCalmS5S3S6SW33W4SW6SW6SW9W7W7
2 days agoSW8SW8W6SW7SW5SW4W3CalmNW3CalmSW4S5CalmCalmS4CalmCalmSW3Calm4SW8SW10SW8SW9
G16

Tide / Current Tables for Santa Cruz, Monterey Bay, California (sub)
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Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.


Tide / Current Tables for Point Pinos, California Current
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Point Pinos
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Sat -- 02:42 AM PDT     -0.00 knots Slack
Sat -- 05:57 AM PDT     -0.86 knots Max Ebb
Sat -- 06:04 AM PDT     Sunrise
Sat -- 09:29 AM PDT     Moonset
Sat -- 09:50 AM PDT     0.00 knots Slack
Sat -- 12:48 PM PDT     0.66 knots Max Flood
Sat -- 04:13 PM PDT     -0.00 knots Slack
Sat -- 06:31 PM PDT     -0.49 knots Max Ebb
Sat -- 08:23 PM PDT     Sunset
Sat -- 09:53 PM PDT     0.00 knots Slack
Sat -- 10:58 PM PDT     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.50.40.2-0.1-0.4-0.8-0.9-0.8-0.5-0.30.10.40.60.70.60.40.1-0.3-0.5-0.5-0.3-0.200.2

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 (18,4,5,8)
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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.