Thursday, November15, 2018 L-36.com


Marine Weather and Tides
Potrero, CA

Version 3.4
What's New / NOTES
10/6/2018 Colors of tide XTide graphs changed to emphasize that they were upgraded. See next note. Comments welcome.
10/4/2018 I have fixed XTide and updated the harmonic files. There were some name changes so you might have to click EDIT to find the new station name.

Sunrise 6:14AMSunset 4:47PM Thursday November 15, 2018 2:42 PM PST (22:42 UTC) Moonrise 1:42PMMoonset 12:00AM Illumination 54% Phase: First Quarter Moon; Moon at 8 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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PZZ750 Coastal Waters From San Mateo Point To The Mexican Border And Out To 30 Nm- 128 Pm Pst Thu Nov 15 2018
Tonight..Wind nw to 10 kt in the evening...becoming variable less than 10 kt. Wind waves 2 ft or less. Mixed swell W 1 to 3 ft at 14 seconds and S 3 ft at 13 seconds.
Fri..Wind variable less than 10 kt. Wind waves 2 ft or less. Mixed swell W 2 to 3 ft at 15 seconds and S 3 ft at 13 seconds.
Fri night..Wind variable less than 10 kt. Wind waves 2 ft or less. Mixed swell W 2 to 3 ft at 13 seconds and S 3 ft at 15 seconds.
Sat..Wind variable less than 10 kt...becoming W to 10 kt in the afternoon. Wind waves 2 ft or less. Mixed swell W 1 to 2 ft at 12 seconds and S 3 ft at 14 seconds.
Sat night..Wind N to 10 kt in the evening... Becoming variable less than 10 kt. Wind waves 2 ft or less. SWell W 1 to 2 ft at 12 seconds. SWell S 3 ft.
Sun..Wind variable less than 10 kt...becoming nw 10 kt in the afternoon. Wind waves 2 ft or less. SWell W 1 to 2 ft.
Sun night..Wind variable less than 10 kt. Wind waves 2 ft or less. SWell W 1 to 3 ft.
Mon..Wind variable less than 10 kt. Wind waves 2 ft or less. SWell W 2 to 3 ft.
Mon night..Wind variable less than 10 kt. Wind waves 2 ft or less. SWell nw 1 to 2 ft.
Tue..Wind variable less than 10 kt...becoming W 10 kt in the afternoon. Wind waves 2 ft or less. SWell nw 1 to 2 ft.
Tue night..Wind variable less than 10 kt. Wind waves 2 ft or less. SWell W 1 to 2 ft.
PZZ700 128 Pm Pst Thu Nov 15 2018
Synopsis for the far southern california coast.. At 1 pm, a 1032 mb high was over western idaho and a 1020 mb low was 100 miles east of the gulf of california. NEutral flow will bring light and variable winds through Monday. A very weak and intermittent coastal eddy circulation is expected tonight into Saturday. Patchy dense fog is possible, but not probable, over the coastal waters Friday morning.


7 Day Forecast for Marine Location Near Potrero, CA
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location: 31.69, -116.65     debug


Area Discussion for - San Diego, CA
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Fxus66 ksgx 151751
afdsgx
area forecast discussion
national weather service san diego ca
951 am pst Thu nov 15 2018

Synopsis
Santa ana winds will continue to weaken today. Inland areas will
warm today and Friday while cooling near the coast today spreads
into the valleys on Friday. Patchy night and morning low clouds
and fog may return near the coast with a greater return expected
for the weekend. A weakening low pressure system is expected to
move inland across southern california and northern baja on
Tuesday, bringing more cooling and a deeper marine layer.

Precipitation from this system is not expected at this time.

Discussion For extreme southwestern california including orange...

san diego... Western riverside and southwestern san bernardino
counties...

Update...

still having isolated gusts 35-45 mph along the coastal mountain
slopes in san diego county this morning. However, these winds will
continue to weaken today. Relative humidity values will continue
critical away from the coast, with minimum values running in the
8-12% at most inland locations today.

Sunny skies will prevail today with some thin high cirrus clouds
spreading in from the west. This could make for a nice sunset this
evening!
the high level cirrus will increase tonight. The marine layer will
make its first try into the coast tonight as the surface pressure
gradient transitions from offshore to neutral. It is questionable
on whether or not any fog or low clouds will move onshore. There
is higher confidence on fog, possibly dense, near the coast Friday
night-Saturday morning as onshore pressure gradient returns.

Previous discussion (issued at 328 am pst Thu nov 15 2018)...

Short term (today through Saturday)
Stronger and gusty east to northeast winds continue along the
coastal mountain slopes into the inland valleys of san diego
county, in the inland empire below the cajon and banning passes,
and near and along the coastal slopes of the santa ana mountains.

As expected, the winds are not as widespread and not as strong as
those of 24 hours ago. Gusts in the windier locations are mostly
less than 50 mph. These winds are expected to continue into this
morning, then diminish during the afternoon. The lower level flow
will become weakly onshore on Friday and a little stronger onshore
on Saturday with a weak coastal eddy during the night and morning
hours.

High temperatures will begin to cool near the coast today and
will warm from the valleys inland. Cooling will spread into
coastal and valley areas on Friday and continue on Saturday for
those areas and spread farther inland.

Patchy low clouds and fog may return near the coast late tonight
into Friday morning with a greater return near the coast for
Friday night into Saturday. Some of that patchy fog for late
tonight into Friday morning could be locally dense.

Long term (Sunday through Wednesday)
A pattern change across the eastern pacific into the western
states will be underway. High pressure near the california coast
will change little or weaken slightly for Sunday and Monday. A
weak upper level closed low pressure system over the eastern
pacific will weaken and move inland across southern california and
northern baja on Tuesday. Precipitation associated with this
weakening low pressure system is expected to mostly dissipate
before moving inland with only very small chances for a period of
light precipitation on Tuesday. Otherwise, it will bring more
cooling for Tuesday and Wednesday and deepening of the marine
layer.

Aviation
151730z... Gradually increasing high clouds around 20000 feet msl
with unrestricted vis through Friday morning. Light and variable
winds through the period.

Marine
No hazardous marine weather through Monday. Patchy dense fog is
possible, but not probable, in the coastal waters Friday morning.

Fire weather
Wind gusts along the coastal mountain slopes and through below
passes are in the 30-40 mph range, highest along the san diego
county coastal mountain slopes with MAX gusts this morning near
45 mph. These winds will subside over the next couple of hours.

However, critically low relative humidity will continue today away
from the coast with most locales having minimum rh values in the
8-12% range.

The lower level flow will go weakly onshore on Friday and
strengthen slightly on Saturday. This will spread cooling and
higher coastal humidity inland with a greater overnight recovery.

Weak offshore flow may return for inland areas for late Saturday
night into Sunday morning and late Sunday night into Monday
morning with gusty east to northeast winds mostly 30 mph or less
near the coastal slopes of the mountains and below passes and
canyons. The humidity for those areas could fall to around 15
percent at times, mainly during the late morning into the
afternoon on Sunday and Monday.

Skywarn
Skywarn activation is not requested. However weather spotters are
encouraged to report significant weather conditions.

Sgx watches warnings advisories
Ca... None.

Pz... None.

Public... Gregoria (update) 17 (prev discussion)
aviation marine... Connolly


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
TIXC1 - Tijuana River Reserve, CA 66 mi72 min NNW 4.1 72°F 1017 hPa
SDBC1 - 9410170 - San Diego, CA 76 mi48 min 1015.8 hPa

Wind History for USS MIDWAY South Navy Pier, San Diego, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
San Diego, Brown Field Municipal Airport, CA64 mi49 minW 910.00 miFair74°F21°F14%1015.7 hPa

Wind History from SDM (wind in knots)
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Last 24hrW8W5W3E10SE4CalmCalmNE5CalmCalmSW3CalmCalmE6NE3E3NE3NE3CalmCalmNW5NW5W7
G14
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1 day agoNW5E10
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CalmSE5E5E4E3E4NE5E3E8SE13
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NW45W6NW5W8
2 days agoSE15E16
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SE8E11SE8SE5CalmS5E4NE4CalmCalmE56CalmE16E13SE13
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G24
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G24
SE16
G24
SE15E14
G21

Tide / Current Tables for Ensenada, Baja California Norte, Mexico
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Ensenada
Click for Map
Thu -- 04:36 AM PST     1.11 meters High Tide
Thu -- 06:15 AM PST     Sunrise
Thu -- 06:54 AM PST     First Quarter
Thu -- 09:46 AM PST     0.88 meters Low Tide
Thu -- 12:42 PM PST     Moonrise
Thu -- 02:30 PM PST     1.07 meters High Tide
Thu -- 04:46 PM PST     Sunset
Thu -- 09:53 PM PST     0.24 meters Low Tide
Thu -- 11:48 PM PST     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.60.70.911.11.11.110.90.90.90.9111.11.110.90.70.50.40.30.20.3

Tide / Current Tables for Imperial Beach, California
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Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.


Weather Map and Satellite Images
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wmap_P
GOES Local Image of Southwest    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 Diego, CA (17,4,5,8)
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Ground Weather Radar Station San Diego, 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.