Tuesday, March20, 2018 L-36.com

Marine Weather and Tides
San Diego, CA

Version 3.4
What's New / NOTES
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.
6/25/2017 - NOAA is having a major issue that impact the 7 day forecast load times. Many users are reporting problems. The issue has been reported.
5/23/2017 - Worked with NOAA again to speed up the 7 day forecast load times. Thanks to them for being responsive.

Sunrise 6:50AMSunset 7:02PM Tuesday March 20, 2018 1:03 AM PDT (08:03 UTC) Moonrise 9:03AMMoonset 10:25PM Illumination 12% Phase: Waxing Crescent; Moon at 3 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- 158 Pm Pdt Mon Mar 19 2018
Tonight..Wind nw 10 kt with gusts to 15 kt in the evening... Becoming variable less than 10 kt. Wind waves 2 ft or less. SWell W 2 ft at 12 seconds.
Tue..Wind variable less than 10 kt...becoming nw 10 kt with gusts to 15 kt in the afternoon. Wind waves 2 ft or less. SWell W 2 ft at 13 seconds. Slight chance of rain in the afternoon.
Tue night..Wind nw to 10 kt with gusts to 15 kt in the evening...becoming variable less than 10 kt. Wind waves 2 ft or less. SWell sw 2 ft at 12 seconds. Slight chance of rain in the evening. Chance of rain after midnight.
Wed..Wind variable less than 10 kt. Wind waves 2 ft or less. SWell sw 2 to 3 ft at 10 seconds. Chance of rain in the morning. Slight chance of rain in the afternoon.
Wed night..Wind variable less than 10 kt. Wind waves 2 ft or less. SWell W 3 to 4 ft at 9 seconds. Chance of rain.
Thu..Wind S 10 to 15 kt with gusts to 20 kt. Wind waves 4 ft. SWell sw 3 to 5 ft. Rain.
Thu night..Wind W 10 kt...becoming nw after midnight. Gusts to 15 kt. Wind waves 2 ft or less. SWell sw 4 to 5 ft. Showers likely.
Fri..Wind nw 10 kt. Gusts to 15 kt in the afternoon. Wind waves 2 ft or less...becoming 3 ft in the afternoon. SWell W 3 to 4 ft. Chance of showers in the morning. Slight chance of showers in the afternoon.
Fri night..Wind nw 10 to 15 kt with gusts to 20 kt. Wind waves 4 ft. SWell W 3 to 6 ft.
Sat..Wind W 10 to 15 kt with gusts to 20 kt. Wind waves 4 ft. SWell W 4 to 6 ft.
Sat night..Wind nw 15 to 20 kt with gusts to 25 kt. Wind waves 5 ft. SWell W 4 to 6 ft.
PZZ700 158 Pm Pdt Mon Mar 19 2018
Synopsis for the far southern california coast.. At 1 pm, a 990 mb storm system was about 1500 nm west of san francisco, and a 1022 mb high was over northwestern nevada. Weak onshore flow will prevail through Wednesday as the storm system approaches, then winds will strengthen Thursday when the storm is overhead. Somewhat elevated winds and swells will occur Friday and Saturday.

7 Day Forecast for Marine Location Near San Diego, CA
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location: 32.78, -117.23     debug

Area Discussion for - San Diego, CA
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Fxus66 ksgx 200423
area forecast discussion
national weather service san diego ca
923 pm pdt Mon mar 19 2018

Dry weather will continue through much of Tuesday. Light showers
will be possible as early as Tuesday afternoon as a strong
atmospheric river begins to take shape along the coast. Shower
activity should then slowly increase into Wednesday, especially
north of san diego county. The main rain event is anticipated
Wednesday night into Thursday, with flash flooding and debris
flows near recent burn scars possible. Snow will not be a factor
with this storm, with rain likely impacting even area ski resorts
through Thursday. Quieter weather is expected over the weekend.

Discussion For extreme southwestern california including orange...

san diego... Western riverside and southwestern san bernardino

from previous discussion...

a ridge of high pressure will dominate socal weather through
Tuesday morning, though high clouds will be increasing throughout
the day. Afternoon highs will be near seasonal averages Tuesday.

The atmospheric river (ar) that will impact california late Tuesday
through Friday continues to evolve over the east central pacific.

An initial push of sub-topical moisture is expected Tuesday, with
and ahead of a warm frontal passage. This may result in some
light shower activity over the region (particularly north and west
of san diego county), along with more persistent cloud cover.

Light showers should remain possible through Tuesday night, with
areas of orographic enhancement along the coastal slopes.

Some uncertainty remains for Wednesday, with model differences of
a couple hundred miles in the north-south placement of the
deepest moisture (ar). The area with the highest probability of
excessive rainfall looks to be focused on a region near point
conception (see wpc excessive rainfall outlook). However slight
changes could shift this region closer to l.A. Or orange counties
during this period. In any case rain remains in the forecast for
this period with rain chances and accumulations decreasing rapidly
from north to south. Snow is not expected, with the sub-tropical
influences on this system pushing snow levels well above resort
level (snow levels 9,000 ft or higher).

The main period of concern for flash flooding and or debris flows
near recent burn scars is expected for orange, san bernardino,
riverside, and san diego counties during the Wednesday night-
Thursday time period. This is when the low off the coast opens up
and is absorbed into the broader westerly flow, shifting the core
of the strong ar south and east. It will also drag a cold front
through the region. Though timing differences still exist in the
guidance, forecaster confidence is high that a 6-12 hour period
of moderate-heavy rain will occur. The depth of the saturated
layer (up to 200 mb!) will result in a heavy rain threat that
could extend into the deserts (especially the upper deserts).

Highest totals should be found along the coastal slopes, where 850
mb upslope flow may approach 35-45 knots at times. Those with
activities that are flood sensitive should be focused on this
period! A detailed rain forecast can be found in the hydrology
section below. Gusty winds are expected along the desert slopes,
but they should occur in areas that generally see minimal impact.

Snow will remain a non factor with snow levels at or above 9,000
ft through Thursday.

Light rainfall may linger into Friday with the northwesterly flow
behind the cold front. Snow levels will finally begin to dip
during this period, though rapid decreases in available moisture
will limit any snow accumulations to just a few inches.

The weekend should see below average temperatures as troughing
lingers along the west coast. A period of light showers can't be
ruled out for Sunday.

200345z... Sct-bkn clouds above 12000 ft msl will continue through
Tuesday morning with unrestricted vis. Clouds will thicken with
bases lowering to 5000-8000 ft msl Tuesday afternoon. -shra and some
mountain obscurations possible in orange county and southwestern san
bernardino county after 20z.

No hazardous marine weather is forecast through Thursday. A storm
system will likely bring rain at times Wednesday and through early
Friday, while higher winds and swell are likely Friday and Saturday,
possibly reaching small craft advisory criteria.

A low pressure system and associated with a strong atmospheric
river will impact california Tuesday through Friday. The greatest
rainfall and impacts are anticipated in socal Wednesday night into
Thursday, though light showers are possible as early as Tuesday.

Uncertainty is higher for orange and san bernardino counties,
where a slight southward shift in storm track could result in an
earlier onset of moderate to heavy rainfall. The following
provides details on expected storm total rainfall and rainfall
rates. In general rain totals should decrease from north to south.

Forecast rain totals:
orange county: 1-3 inches
inland empire: 1-4 inches
coastal slopes: 3-6 inches with local amounts to 8 inches san
diego county (coast & valleys): 0.5-2 inches upper deserts: 0.75-2
inches coachella valley: 0.25-1.00 inches san diego county
desert: 0.25-0.75 inches
hourly rainfall rates:
Tuesday - Wednesday afternoon
0.25 inches or less locally higher along the coastal slopes.

Wednesday night - Thursday
rates near 0.50 inches per hour probable, with the potential for
rates as high as 0.75-1.00 per hour for brief periods.

Snow is not expected to be an issue, with snow levels remaining at
or above 9,000 ft for most of the storm.

Skywarn activation will not be needed today.

Sgx watches warnings advisories
Ca... Flash flood watch from Wednesday evening through late Thursday
night for orange county coastal areas-orange county inland
areas-san bernardino county mountains-san bernardino and
riverside county valleys-the inland empire-santa ana
mountains and foothills.

Pz... None.

Public... Pg
aviation marine... Ss

Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
SDBC1 - 9410170 - San Diego, CA 5 mi45 min 65°F1018.4 hPa
LJAC1 - 9410230 - La Jolla, CA 6 mi51 min Calm G 1.9 56°F 1017.5 hPa
LJPC1 - La Jolla, CA (073) 6 mi43 min Calm 2 ft
46258 14 mi63 min 60°F3 ft
46225 - Torrey Pines Outer, CA (100) 14 mi72 min 60°F2 ft
TIXC1 - Tijuana River Reserve, CA 15 mi78 min Calm 53°F 1019 hPa51°F
46232 - Point Loma South, CA (191) 20 mi63 min 60°F3 ft
46224 - Oceanside Offshore, CA (045) 30 mi63 min 59°F2 ft
46242 - Camp Pendleton Nearshore, CA (043) 32 mi65 min 60°F2 ft
46086 - San Clemente Basin 47 mi73 min N 9.7 G 12 60°F 60°F3 ft1017.9 hPa (+0.4)

Wind History for USS MIDWAY South Navy Pier, San Diego, CA
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1 day
2 days

Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
San Diego, San Diego International-Lindbergh Field, CA5 mi72 minN 010.00 miPartly Cloudy58°F51°F78%1018.2 hPa
San Diego, Montgomery Field, CA6 mi70 minNNE 410.00 miFair54°F48°F83%1017.5 hPa
San Diego, North Island, Naval Air Station, CA6 mi71 minNE 410.00 miPartly Cloudy58°F54°F87%1017.5 hPa
San Diego, Miramar MCAS/Mitscher Field Airport, CA8 mi68 minENE 510.00 miFair51°F45°F80%1017.1 hPa
Gillespie Field Airport, CA14 mi68 minN 010.00 miFair50°F44°F82%1017.6 hPa
Imperial Beach Naval Outlying Field - Ream Field, CA15 mi67 minE 410.00 miMostly Cloudy48°F48°F100%1017.9 hPa
San Diego, Brown Field Municipal Airport, CA19 mi70 minE 410.00 miFair48°F45°F89%1017.4 hPa

Wind History from NZY (wind in knots)
Last 24hrN4N4N3CalmCalmCalmCalmCalmCalmCalmSW5NW7NW9NW10W11NW10NW9NW9NW10W3NW5NW5N5NE4
1 day agoW7W9NW13NW11--N6E5E4SE7SE6S4S5SW7W11NW12W13
2 days agoS6SW10S4SE8SE10S11CalmE4S7CalmNW7NW10W7W5W6W10W10W10W9W8NW6W11--NW7

Tide / Current Tables for Crown Point, Mission Bay, California
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Crown Point
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Tue -- 06:09 AM PDT     0.19 feet Low Tide
Tue -- 06:52 AM PDT     Sunrise
Tue -- 09:03 AM PDT     Moonrise
Tue -- 11:55 AM PDT     4.38 feet High Tide
Tue -- 06:03 PM PDT     0.78 feet Low Tide
Tue -- 07:00 PM PDT     Sunset
Tue -- 10:24 PM PDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

Tide / Current Tables for San Diego Bay Entrance, California Current
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San Diego Bay Entrance
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Tue -- 03:01 AM PDT     -1.88 knots Max Ebb
Tue -- 06:12 AM PDT     0.00 knots Slack
Tue -- 06:52 AM PDT     Sunrise
Tue -- 09:03 AM PDT     Moonrise
Tue -- 09:04 AM PDT     1.42 knots Max Flood
Tue -- 12:13 PM PDT     -0.00 knots Slack
Tue -- 03:17 PM PDT     -1.50 knots Max Ebb
Tue -- 06:12 PM PDT     0.00 knots Slack
Tue -- 07:00 PM PDT     Sunset
Tue -- 09:09 PM PDT     1.43 knots Max Flood
Tue -- 10:24 PM PDT     Moonset
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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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.
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Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for San Diego, CA (4,6,7,8)
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Ground Weather Radar Station San Diego, CA
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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.