Thursday, October17, 2019 L-36.com


Marine Weather and Tides
Potrero, CA

Version 3.4
NOTICE
10/9/2019 Updated the Marine Zones.
9/4/2019 Fixed the weather maps due to NOAA moving them.
7/25/2019 New feature in the Airports section gives a link to 5 minute updates for data reports.
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 6:49AMSunset 6:13PM Thursday October 17, 2019 10:55 AM PDT (17:55 UTC) Moonrise 8:59PMMoonset 10:17AM Illumination 83% 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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PZZ750 Coastal Waters From San Mateo Point To The Mexican Border And Out To 30 Nm- 210 Am Pdt Thu Oct 17 2019
Today..Wind variable less than 10 kt...becoming sw 10 kt with gusts to 15 kt in the afternoon. Wind waves 2 ft or less. Mixed swell W 2 to 3 ft at 7 seconds and sw 2 ft at 15 seconds.
Tonight..Wind W 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 3 to 5 ft at 8 seconds and sw 2 ft at 14 seconds.
Fri..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 3 to 5 ft at 9 seconds and sw 2 ft at 14 seconds.
Fri night..Wind nw 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 3 to 5 ft at 10 seconds and sw 1 to 2 ft at 13 seconds.
Sat..Wind variable less than 10 kt...becoming sw 10 kt in the afternoon. Wind waves 2 ft or less. Mixed swell W 3 to 5 ft at 9 seconds and sw 1 ft at 13 seconds.
Sat night..Wind sw to 10 kt in the evening... Becoming variable less than 10 kt. Wind waves 2 ft or less. Mixed swell W 3 to 4 ft and sw 1 ft.
Sun..Wind variable less than 10 kt...becoming W 10 kt in the afternoon. Wind waves 2 ft or less. Mixed swell W 3 to 4 ft and sw 1 to 2 ft.
Sun night..Wind variable less than 10 kt. Wind waves 2 ft or less. Mixed swell W 1 to 4 ft and sw 2 ft.
Mon..Wind variable less than 10 kt...becoming W 10 kt in the afternoon. Wind waves 2 ft or less. Mixed swell W 2 to 4 ft and sw 2 ft.
Mon night..Wind nw 10 kt in the evening...becoming variable less than 10 kt. Wind waves 2 ft or less. Mixed swell W 2 to 3 ft and sw 2 ft.
PZZ700 210 Am Pdt Thu Oct 17 2019
Synopsis for the far southern california coast.. Onshore flow will prevail through the weekend, peaking this afternoon and evening. An increase in northwest swell with a short period will generate steep waves that could be hazardous to small craft over the outer waters this evening. A weak and intermittent coastal eddy is expected today into Sunday. Offshore flow will develop Sunday and peak Monday.


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 171622
afdsgx
area forecast discussion
national weather service san diego ca
922 am pdt Thu oct 17 2019

Synopsis
Onshore flow will strengthen today, with a coastal eddy and areas
of low clouds and fog extending up to 20 miles inland this
morning. High temperatures will be 10 to 15 degrees lower than
yesterday for most areas. Gusty southwest to west winds will
develop in the mountains and deserts for the afternoon and
evening. Low clouds will spread into portions of the inland
valleys again tonight into Friday morning with somewhat less
coverage. For Friday night into Saturday morning, the low clouds
and fog will be mostly restricted to the coastal areas. There will
a period of weak to locally moderate offshore flow developing
Sunday and continuing into early Tuesday, with the strongest winds
on Monday morning near the coastal slopes of the mountains and
below passes and canyons. The offshore flow will be accompanied by
very low relative humidity inland. There will be a warming trend
for Sunday through Tuesday with cooling spreading inland on
Wednesday as weak onshore flow returns.

Discussion For extreme southwestern california including orange...

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

this morning, a trough of low pressure has brought significant
cooling and a return of marine layer low clouds and fog to the
coastal areas and western portions of the inland valleys, along
with a coastal eddy. The marine layer is currently around 1700 ft
deep and low clouds fog are in the process of dissipating after
having spread about 20 miles inland overnight.

High temperatures today will be 10 to 15 degrees lower in most
areas than yesterday. There will also be gusty southwest to west
winds in the mountains and deserts during the afternoon and
evening with strongest gusts to 45 mph. Some mid and high clouds
will continue to spread across the area today, then move east this
afternoon and tonight.

As the trough moves inland and a reinforcing shortwave passes over
socal, there will be a brief period of gusty north winds of 35
mph or less Friday morning for the coastal slopes of the san
bernardino county mountains and below the cajon pass. Weak
onshore flow returns Friday afternoon and continues into Saturday
night. High temperatures for Friday and Saturday with be near to
slightly warmer than today.

The marine layer will continue to deepen into early Friday with
marine layer low clouds spreading into portions of the inland
valleys tonight into Friday morning. Patchier low cloud coverage
is expected for Friday night into Saturday morning with the low
clouds mostly near the coast.

Sunday through Wednesday... As the low pressure trough moves east
over the rockies and a surface high moves into the great basin,
offshore pressure gradients will develop over socal. This will
bring a period of weak to locally moderate offshore flow,
developing Sunday and continuing into early Tuesday. The winds are
expected to peak late Sunday night into Monday morning with
strongest gust 35 to 40 mph. Inland humidity will fall to around
10-15 percent on Monday and to 10 percent or less on Tuesday.

There will be a warming trend Sunday through Tuesday, with inland
temperatures reaching into the 90s on Mon and tue. Cooling will
begin to spread inland on Wednesday as weak onshore flow returns.

Aviation
171530z... Coast valleys... Low clouds with bases 1200-1600 ft msl are
becoming more patchy but continue to cover coastal areas and far
western valleys. Patchy areas of reduced vis 3-5sm in br fg. Low
clouds and vis restrictions should clear by 18z. Isolated and
intermittent CIGS along coast are possible through the afternoon.

Low clouds redeveloping after 02z with bases 1500-2000 ft msl.

Moderate confidence low clouds will fill in most of the coastal
basin overnight.

Mountains deserts...VFR conditions will prevail today and tonight,
with some variable high clouds. West to northwest sfc winds will
strengthen after 21z, gusting to 35 kts through mountain passes and
into adjacent desert corridors.

Marine
Northwest swell will produce seas of 6-8 feet late today through
early Friday in the outer waters south of san clemente island. A
short period will generate steep waves that could be hazardous to
small craft. Some wind gusts in the outer waters could exceed 20 kts
late today.

Fire weather
Onshore flow will spread cooling and higher humidity inland today,
with gusty southwest to west winds in the mountains and deserts
this afternoon and evening. The strongest gusts are expected to be
around 45 mph.

There will be a brief period of gusty north winds Friday morning
near the coastal slopes of the san bernardino county mountains and
below passes and canyons, with the strongest gusts mostly less
than 35 mph. The humidity will mostly remain 25 percent or above
during the windy period in the morning. The humidity will fall to
around 15 percent in parts of the inland empire Friday afternoon
even as winds weaken.

A period of weak to locally moderate strength offshore flow is
expected to develop on Sunday and continue into early Tuesday. The
strongest winds are expected from late Sunday night into Monday
afternoon with strongest gusts to 35 to 40 mph. The model trend
has been toward a solution with weaker winds.

The humidity will fall to 10-15 percent inland on Monday, with a
brief period of critical fire weather conditions in the mountains
and inland valleys Monday morning into Monday afternoon.

The winds will be weaker and more localized for Monday night into
Tuesday morning. The humidity for inland areas will fall to
around 10 percent Tuesday, with elevated fire weather conditions
for the mountains and inland valleys although winds will be weaker.

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 fire weather... Pg
aviation marine... Co


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
TIXC1 - Tijuana River Reserve, CA 66 mi130 min S 1.9 67°F 1011 hPa61°F
SDBC1 - 9410170 - San Diego, CA 76 mi61 min 70°F1010.6 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 mi62 minSE 46.00 miFair with Haze68°F55°F65%1010.8 hPa

Link to 5 minute data for KSDM

Wind History from SDM (wind in knots)
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Last 24hr5W7W8W73W7W7W9CalmCalmCalmSE3CalmCalmCalmCalmCalmCalmW3NE3SW4E5NE3SE4
1 day ago36W10
G16
W9W8W7W9W5W3CalmCalmCalmE4CalmCalmE3E6E6SE8S4S6S53Calm
2 days agoNW4W9W6W9W7W7W9W8W5W3CalmCalmCalmCalmNE3NE5E4E4CalmCalmE4SE3Calm4

Tide / Current Tables for Ensenada, Baja California Norte, Mexico
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Ensenada
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Thu -- 04:32 AM PDT     0.54 meters Low Tide
Thu -- 06:51 AM PDT     Sunrise
Thu -- 10:17 AM PDT     Moonset
Thu -- 10:55 AM PDT     1.59 meters High Tide
Thu -- 06:00 PM PDT     0.12 meters Low Tide
Thu -- 06:12 PM PDT     Sunset
Thu -- 08:58 PM PDT     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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1.110.80.70.60.60.70.91.11.41.51.61.51.310.70.40.20.10.20.30.50.70.9

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
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wmap_P
GEOS 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 (13,3,4,5)
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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.