Tuesday, June19, 2018 L-36.com


Marine Weather and Tides
Las Lomas, CA

Version 3.4
What's New / NOTES
5/20/2018 -- NOAA is having problems with the data feed that I use to draw the graphs. They are aware of the issue and working to resolve it. Sometimes changing the location by about a mile will give a correct graph. 3/3/2018 - There is a new GOES Satellite for the east coast that required rewriting that part of the code. Please report any issues.

Sunrise 5:46AMSunset 8:30PM Tuesday June 19, 2018 8:30 PM PDT (03:30 UTC) Moonrise 11:25AMMoonset 12:00AM Illumination 42% Phase: Waxing Crescent; Moon at 7 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- 245 Pm Pdt Tue Jun 19 2018
.small craft advisory in effect until 9 pm pdt this evening...
.small craft advisory in effect from Wednesday afternoon through Wednesday evening...
Tonight..W winds 15 to 25 kt...becoming nw 5 to 15 kt after midnight. Wind waves 3 to 4 ft in the evening...becoming 2 ft or less. W swell 3 to 5 ft at 13 seconds.
Wed..NW winds 5 to 15 kt...becoming W 15 to 25 kt in the afternoon. Wind waves 2 ft or less...becoming 3 to 4 ft in the afternoon. W swell 3 to 5 ft at 13 seconds.
Wed night..W winds 15 to 25 kt...becoming nw 5 to 15 kt after midnight. Wind waves 3 to 4 ft in the evening...becoming 2 ft or less. W swell 3 to 5 ft at 11 seconds.
Thu..NW winds 5 to 15 kt...becoming W 15 to 25 kt in the afternoon. Wind waves 3 to 5 ft. W swell 3 to 5 ft at 11 seconds.
Thu night..W winds 15 to 25 kt...becoming nw 5 to 15 kt after midnight. Wind waves 3 to 5 ft. W swell 3 to 5 ft at 11 seconds.
Fri..NW winds 5 to 15 kt...becoming W 15 to 25 kt in the afternoon. Wind waves 3 to 5 ft. W swell 4 to 6 ft.
Sat..NW winds 5 to 15 kt. Wind waves 1 to 3 ft. W swell 4 to 6 ft.
Sun..SW winds 10 kt. Wind waves 2 ft or less. W swell 3 ft.
PZZ500 245 Pm Pdt Tue Jun 19 2018
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Moderate northwesterly winds will persist across the coastal waters through midweek with strongest winds expected along the near shore waters where coastal jets are typical as well as across the bays through the afternoon and evening hours. Winds are forecast to strengthen during the second half of the week. Seas will remain relatively light with a mixed northwest and southerly swell.

7 Day Forecast for Marine Location Near Las Lomas, CA
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location: 36.86, -121.76     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
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Fxus66 kmtr 200203
afdmtr
area forecast discussion
national weather service san francisco bay area
703 pm pdt Tue jun 19 2018

Synopsis Temperatures will warm throughout the interior this
afternoon as high pressure begins to build over the southwestern
united states. Little day-to-day change in highs are expected from
Tuesday to Wednesday as high pressure flattens. A noted warming
trend develops late in the week and into the weekend with hot
temperatures forecast for inland areas.

Discussion As of 01:44 pm pdt Tuesday... Inland stratus was
slow to clear today and coastal locations are still hanging onto
coastal stratus. Interior locations are actually running a few
degrees above yesterday at this time with ample sunshine. The
coast is a different story where lingering coastal clouds are
actually keeping temperatures cooler. It is possible that a few
coastal locations may fall short of their MAX temp forecast for
today.

No major changes during the short term forecast. The longwave
pattern aloft denotes a ridge of high pressure centered over the
bay area. The ridge is forecast to drift slowly eastward over the
next 24 hours. Therefore, night and morning low clouds will be
common again with little day to day change at the coast. However,
away from the coast temperatures are likely to warm a few more
degrees tomorrow. By Thursday the ridge becomes flattened as an
upper level trough passes to the north of the bay area. The
pattern trough will help to moderate weather conditions from
Wednesday to Thursday - night morning clouds continue.

Still the biggest weather impact to the region will be in the long
term forecast. High pressure will rebuild in earnest Friday and
Saturday leading to possibly one of the hottest "heat events" so
far this year. Synoptically speaking high pressure builds over the
region Friday and Saturday with 500mb heights eclipsing 590 dam
and 850mb temps approaching 28c. A fully mixed atmosphere with
850mb temps near 28c would yield MAX temps near 105 degrees. Fwiw
some ensemble guidance envelop puts san jose and santa rosa over
100. Not totally buying off on that yet. Therefore, based on
airmass potential and MOS ensemble guidance high temperatures on
Friday Saturday will be well into the 90s and up to lower 100s
across the interior. Did bump up previous forecast just a few
degrees. Overnight lows will be rather mild as well, especially
in the hills with lows in the 60s and 70s. The combination of hot
daytime temps and mild overnight lows will increase the risk of
heat related illnesses for sensitive group. The latest
experimental heat risk guidance puts much of the interior
north east bay, N san benito in a moderate risk with a few pockets
of high risk. Still kind of far out to issue any heat products
now, but as the event draws near a heat advisory may be needed at
a minimum. For now, issued a hazardous weather outlook
highlighting potential for hot weather.

As typical with heat events in the bay area the battle ground will
be toward the coast - how hot will it get? Latest models guidance
continues to indicate a little bit of onshore flow keeping the
coast much cooler than the interior. However, did raise
temperatures a little with highs in 60s to lower 80s.

Temperatures will cool a little on Sunday as the ridge begins to
shift eastward. Interior locations will still remain above normal
and in the 90s to near 100. More widespread cooling is expected on
Monday and Tuesday as another broad upper trough begins to impact
the west coast.

Aviation As of 7:00 pm pdt Tuesday... Marine layer hovering
around 1500 feet this afternoon but is expected to compress
later tonight as an upper ridge builds over southern california.

Moderate northwest onshore flow persists which is pushing some
stratus through the coastal gaps. Sfo may have tempo MVFR cigs
through 05z but the approach is expected to stay clear. Cigs
becoming more widespread after 05z. As the marine layer
compresses CIGS will drop to ifr range.

Vicinity of ksfo... Brief MVFR CIGS possible through 05z then
becoming mostly cloudy MVFR cigs. Becoming ifr after 08z. West
winds gusting to 25 kt through 05z.

Sfo bridge approach... MVFR after 05z.

Monterey bay terminals... Satellite image shows a good push of
stratus into southern mry bay. Ifr cigs.

Marine As of 06:56 pm pdt Tuesday... Moderate northwesterly
winds will persist across the coastal waters through midweek with
strongest winds expected along the near shore waters where coastal
jets are typical as well as across the bays through the afternoon
and evening hours. Winds are forecast to strengthen during the
second half of the week. Seas will remain relatively light with a
mixed northwest and southerly swell.

Mtr watches warnings advisories
Tngt Sca... Sf bay until 9 pm
sca... Mry bay until 9 pm
sca... Pigeon pt to pt pinos 0-10 nm until 9 pm
sca... Pt pinos to pt piedras blancas 0-10 nm
sca... Pt arena to pt reyes 0-10 nm
public forecast: mm
aviation: W pi
marine: cw
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Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
ELXC1 - Elkhorn Slough Reserve, CA 3 mi106 min SW 9.9 57°F 1016 hPa54°F
46092 - MBM1 16 mi87 min WNW 18 55°F 55°F1015.6 hPa (-0.6)
46240 - Cabrillo Point, Monterey Bay, CA (158) 18 mi40 min 52°F3 ft
MEYC1 19 mi55 min WSW 6 G 12 54°F 54°F1017.3 hPa
46042 - MONTEREY - 27NM West of Monterey Bay, CA 34 mi41 min NW 19 G 25 55°F 56°F6 ft1016 hPa (-0.0)
46239 - Point Sur, CA (157) 40 mi31 min 53°F6 ft

Wind History for Monterey, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Watsonville, Watsonville Municipal Airport, CA6 mi38 minESE 67.00 miFair58°F52°F81%1016.3 hPa
Salinas, Salinas Municipal Airport, CA16 mi38 minNW 109.00 miOvercast58°F52°F81%1017.4 hPa
Hollister, CA, CA19 mi56 minW 1210.00 miFair63°F53°F73%1015.2 hPa
Monterey Regional Airport, CA19 mi37 minSW 710.00 miOvercast56°F51°F84%1018.6 hPa

Wind History from WVI (wind in knots)
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Last 24hrNE4SE4SE4CalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmSW4S8SW8SE7SE6S8SE7SE10SE9E6
1 day agoSW6W5SW3SW3W3CalmCalmCalmCalmCalmNE3CalmSE3SW4SW10SW10SW12SW9SW7SW11SW7S11SW4S5
2 days ago5W44SW4W5W4CalmCalmCalmCalmCalm3S44S76SW7W9SW10
G17
W10SW8SW11SW7SW5

Tide / Current Tables for Elkhorn Slough railroad bridge, Monterery Bay, California
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Elkhorn Slough railroad bridge
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Tue -- 12:49 AM PDT     Moonset
Tue -- 03:43 AM PDT     5.01 feet High Tide
Tue -- 05:47 AM PDT     Sunrise
Tue -- 10:24 AM PDT     -0.36 feet Low Tide
Tue -- 12:24 PM PDT     Moonrise
Tue -- 05:37 PM PDT     4.82 feet High Tide
Tue -- 08:29 PM PDT     Sunset
Tue -- 11:04 PM PDT     2.15 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
3.23.94.54.954.63.82.61.30.2-0.3-0.30.31.22.23.34.24.74.84.43.72.92.42.2

Tide / Current Tables for Point Pinos, California Current
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Point Pinos
Click for Map
Tue -- 12:49 AM PDT     Moonset
Tue -- 02:28 AM PDT     0.45 knots Max Flood
Tue -- 05:16 AM PDT     -0.00 knots Slack
Tue -- 05:49 AM PDT     Sunrise
Tue -- 08:23 AM PDT     -0.80 knots Max Ebb
Tue -- 12:17 PM PDT     0.00 knots Slack
Tue -- 12:25 PM PDT     Moonrise
Tue -- 03:25 PM PDT     0.70 knots Max Flood
Tue -- 06:46 PM PDT     -0.00 knots Slack
Tue -- 08:29 PM PDT     Sunset
Tue -- 09:18 PM PDT     -0.55 knots Max Ebb
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
00.30.40.40.30.1-0.2-0.6-0.8-0.8-0.6-0.4-0.10.20.50.70.70.50.3-0.1-0.4-0.5-0.5-0.4

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 (23,6,7,8)
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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.