Tuesday, October17, 2017 L-36.com

Marine Weather and Tides
San Diego, CA

Version 3.4
What's New / NOTES
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.
5/19/2016 - There were issues with the 3 day airport observation history. I switched to another data source. Let me know if you see any issues with the data feeds.

Sunrise 6:54AMSunset 6:13PM Tuesday October 17, 2017 1:35 PM PDT (20:35 UTC) Moonrise 4:48AMMoonset 5:25PM Illumination 7% Phase: Waning Crescent; Moon at 27 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- 146 Am Pdt Tue Oct 17 2017
Today..Wind variable less than 10 kt...becoming W 10 kt with gusts to 15 kt in the afternoon. Wind waves 2 ft or less. Mixed swell W 1 to 2 ft at 10 seconds and sw 2 to 3 ft at 18 seconds.
Tonight..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. Mixed swell W 1 to 2 ft at 6 seconds and sw 3 ft at 17 seconds.
Wed..Wind variable less than 10 kt...becoming W 10 kt with gusts to 15 kt in the afternoon. Wind waves 2 ft or less. Mixed swell W 1 to 2 ft at 6 seconds and sw 3 to 4 ft at 16 seconds.
Wed night..Wind W to 10 kt with gusts to 15 kt in the evening... Becoming variable less than 10 kt. Wind waves 2 ft or less. Mixed swell W 2 ft at 6 seconds and sw 3 ft at 15 seconds.
Thu..Wind sw to 10 kt...becoming 10 to 15 kt in the afternoon. Wind waves 2 ft or less. Mixed swell W 1 to 2 ft at 6 seconds and sw 3 ft at 15 seconds.
Thu night..Wind W 10 to 15 kt. Wind waves 2 ft or less. Mixed swell W 2 to 3 ft and sw 2 to 3 ft.
Fri..Wind W 10 to 15 kt with gusts to 20 kt. Wind waves 2 ft or less...becoming 3 to 4 ft in the afternoon. Mixed swell W 2 to 4 ft and sw 2 ft.
Fri night..Wind W 10 to 15 kt with gusts to 20 kt. Wind waves 3 to 4 ft in the evening...becoming 2 ft or less. Mixed swell W 3 to 5 ft and S 1 to 2 ft.
Sat..Wind E to 10 kt...becoming W 10 kt with gusts to 15 kt in the afternoon. Wind waves 2 ft or less. Mixed swell W 3 to 5 ft and sw 1 ft.
Sat night..Wind nw 10 kt with gusts to 15 kt...becoming ne after midnight. Wind waves 2 ft or less. Mixed swell W 2 to 4 ft and S 1 to 2 ft.
PZZ700 146 Am Pdt Tue Oct 17 2017
Synopsis for the far southern california coast..At 1 am, a 1036 mb high was over eastern oregon and a 1013 mb low was over the inland empire. Light to moderate northwest winds will continue this week. A low pressure system could bring wind gusts of 20 kt or more on Friday. An elevated short period northwest swell could bring rough seas 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 171614
area forecast discussion
national weather service san diego ca
914 am pdt Tue oct 17 2017

Light offshore winds and high pressure aloft will result in
another very warm day today, with scattered high clouds. An upper
level disturbance may bring some sprinkles or light showers to the
mountains Wednesday, with a small chance of thunderstorms. A
deepening trough over the west will bring a cooling trend
Wednesday through Friday with the marine layer returning and
deepening. Expect night and morning clouds over the coast and
portions of the valleys. On Saturday the flow turns offshore as
high pressure builds. That will bring santa ana conditions, clear
skies and hot weather, especially Sunday and Monday.

Discussion For extreme southwestern california including orange...

san diego... Western riverside and southwestern san bernardino

infrared satellite imagery this morning shows cold cloud tops and
thunderstorms associated with a short-wave trough offshore of
point conception, while mid and high level clouds can be seen
starting to stream into southern california from the southwest.

The 12z miramar sounding indicated a dry layer from the surface up
through 700 mb, a moist layer from about 660-580 mb, and then dry
air above that. There's no hint of a marine layer returning to the
coast yet, as dewpoints along the coast are only in the 30s-40s.

This is due to offshore pressure gradients continuing across the
region, with the san diego to tonopah gradient at 8.8 mb and the
san diego to las vegas gradient at 3.8 mb. On water vapor
satellite, an upper level ridge can be seen over much of the
southwest. This ridge and the light offshore flow will result in
another warm day across southern california today, with highs 5-15
degrees above normal. The ridge will start to get flattened and
pushed south tonight as a low pressure system from alaska moves
south off the coast of british columbia. This will result in
onshore flow returning and likely a return of the marine layer at
the coast. There could be dense fog along the coast late tonight
into Wednesday morning, but confidence is low at the moment as the
hrrr and other hi-res models do not show much.

On Wednesday, the aforementioned short-wave trough gets picked up
by the west flow aloft as the large scale trough off of british
columbia deepens further. The short-wave trough will move across
point conception early Wednesday morning and then across san
bernardino county mid Wednesday morning into Wednesday afternoon.

The bulk of the moisture and lift will be close to the short-
wave while the best elevated instability will be south into
riverside and san diego counties. With those parameters not really
lining up, confidence in any widespread elevated convection
occurring is low at the moment, with best chances for some
isolated thunderstorms being in san bernardino county and the best
chances for any measurable rainfall being in the mountains where
the rain will not have to go through a deep dry layer.

A cooling trend will begin on Wednesday and continue through
Friday as the large-scale trough deepens further and moves inland
over the pacific northwest. The coolest day will be Friday when
highs fall to 5-10 degrees below normal. Onshore flow will
strengthen as a result, with strong and gusty west winds in the
mountains and deserts (gusts 30-40 mph, local 50 mph). Finally,
the marine layer will deepen each day, eventually reaching around
3500-4000 ft msl on Friday. Expect night and morning marine layer
stratus clouds over the coast and portions of the valleys. There
may be just enough moisture and lift Friday morning for some
drizzle or isolate light showers over and west of the coastal
slopes of the mountains.

Surface high pressure building over the great basin will turn the
flow offshore starting Saturday which, in addition to a building
upper level ridge, will create significant drying and warming. It
will continue to get hotter Sunday and Monday as the ridge builds
further and becomes anomalously strong, with the ECMWF showing 500
mb heights of around 594 dm on Sunday and 596 dm on Monday.

Santa ana winds will continue (right now looking to be around
moderate strength) as well, so expect it to get pretty hot even
all the way to the coast.

171615z... Sct clouds at above 15000 ft msl will prevail through wed
with unrestricted vis. There is a small chance of thunderstorms wed,
mainly over the mountains, likely with bases above 10000 ft msl.

Stratus fog is unlikely in coastal areas tonight or early wed.

No hazardous marine weather is expected through Thursday. Winds will
increase to 20-25 kt in the outer coastal waters Friday, decreasing
by Saturday.

A south southwest swell from 200 degrees will peak today-Wednesday
at 3-4 ft 16-18 seconds. This will produce 3-6 ft surf with sets to
7 ft north of del mar. Highest surf will occur along southwest
facing beaches. Strong rip and longshore currents will accompany the
elevated surf. Swell and surf will lower Thursday. A beach hazard
statement is in effect for elevated surf and strong rip currents
through Wednesday.

Fire weather
Very warm and dry weather (humidity once again down to 5-10
percent) will continue today, but with light winds. An upper
level disturbance may bring some sprinkles light showers over san
bernardino county tomorrow, with a small chance for isolated dry
lightning strikes. Increasingly cool and more humid Wednesday
through Friday as a trough moves in over the west. Gusty westerly
onshore winds in mountains and deserts Thursday and Friday, with
gusts 30-40 mph and local 50 mph.

Another round of moderate santa ana winds likely Saturday through
Monday, with day-time humidity falling down to at least 10
percent Sunday and Monday (with poor overnight recoveries) along
with hot conditions and gusty northeast winds. This would likely
result in critical fire weather conditions through and below the
mountain passes and into the coastal slopes and foothills Sunday
and Monday.

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

Sgx watches warnings advisories
Ca... Beach hazards statement through Wednesday evening for orange
county coastal areas-san diego county coastal areas.

Pz... None.

Public fire weather... Harrison
aviation marine... Maxwell

Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
SDBC1 - 9410170 - San Diego, CA 5 mi47 min 74°F1015.3 hPa
LJPC1 - La Jolla, CA (073) 6 mi75 min NNW 2.9 2 ft
LJAC1 - 9410230 - La Jolla, CA 6 mi53 min W 1.9 G 2.9 73°F 71°F1014.6 hPa
46254 6 mi47 min 71°F1 ft
46225 - Torrey Pines Outer, CA (100) 14 mi74 min 71°F3 ft
46258 14 mi35 min 71°F3 ft
TIXC1 - Tijuana River Reserve, CA 15 mi110 min WNW 6 75°F 1017 hPa65°F
46232 - Point Loma South, CA (191) 20 mi54 min 71°F4 ft
46224 - Oceanside Offshore, CA (045) 30 mi65 min 71°F3 ft
46242 - Camp Pendleton Nearshore, CA (043) 32 mi97 min 68°F3 ft
46086 - San Clemente Basin 47 mi45 min W 9.7 G 12 70°F 70°F4 ft1015.5 hPa (-0.9)

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 mi44 minNW 610.00 miMostly Cloudy81°F55°F41%1015.1 hPa
San Diego, Montgomery Field, CA6 mi42 minWSW 410.00 miFair92°F36°F14%1014.5 hPa
San Diego, North Island, Naval Air Station, CA6 mi1.7 hrsNW 5 miPartly Cloudy83°F52°F34%1015.2 hPa
San Diego, Miramar MCAS/Mitscher Field Airport, CA8 mi1.7 hrsWSW 710.00 miPartly Cloudy91°F34°F13%1014.8 hPa
Gillespie Field Airport, CA14 mi40 minVar 510.00 miClear93°F33°F12%1014.9 hPa
Imperial Beach Naval Outlying Field - Ream Field, CA15 mi39 minW 610.00 miMostly Cloudy77°F64°F64%1014.8 hPa
San Diego, Brown Field Municipal Airport, CA19 mi42 minW 610.00 miFair89°F44°F21%1014.6 hPa

Wind History from NZY (wind in knots)
Last 24hrNW13NW13NW15NW14N11NW8N5N4NW3CalmCalmNE6N3N3N3CalmN3CalmCalmW4N43NW5NW6
1 day agoW9NW7NW6NW4NW6NW4N3CalmCalm--------------CalmNW4CalmCalmCalmNW5N8NW9
2 days agoNW7NW10W8NW9NW8NW6NW5N4N5NW6N5N3N4N5N6N6N3CalmCalmCalmCalmNW3N4NW8

Tide / Current Tables for Crown Point, Mission Bay, California
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Crown Point
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Tue -- 02:40 AM PDT     -0.06 feet Low Tide
Tue -- 04:47 AM PDT     Moonrise
Tue -- 06:54 AM PDT     Sunrise
Tue -- 08:40 AM PDT     5.86 feet High Tide
Tue -- 03:08 PM PDT     0.38 feet Low Tide
Tue -- 05:24 PM PDT     Moonset
Tue -- 06:13 PM PDT     Sunset
Tue -- 08:50 PM PDT     5.47 feet High Tide
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 -- 02:56 AM PDT     0.00 knots Slack
Tue -- 04:47 AM PDT     Moonrise
Tue -- 06:06 AM PDT     1.97 knots Max Flood
Tue -- 06:54 AM PDT     Sunrise
Tue -- 09:02 AM PDT     -0.00 knots Slack
Tue -- 12:03 PM PDT     -2.03 knots Max Ebb
Tue -- 03:19 PM PDT     0.00 knots Slack
Tue -- 05:24 PM PDT     Moonset
Tue -- 06:12 PM PDT     Sunset
Tue -- 06:22 PM PDT     1.79 knots Max Flood
Tue -- 09:12 PM PDT     -0.00 knots Slack
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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Weather Map
IR Satellite Image from GEOS

GOES Local Image of Southwest    EDIT

Wind Forecast for San Diego, CA (16,3,4,5)
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Ground Weather Radar Station San Diego, CA
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weather_mapweather_map weather_map

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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.