Monday, November19, 2018 L-36.com


Marine Weather and Tides
Boulevard, 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 6:19AMSunset 4:44PM Monday November 19, 2018 11:53 AM PST (19:53 UTC) Moonrise 3:54PMMoonset 3:33AM Illumination 89% Phase: Waxing Gibbous; Moon at 12 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- 230 Am Pst Mon Nov 19 2018
Today..Wind variable less than 10 kt. Wind waves 2 ft or less. SWell W 1 to 2 ft at 13 seconds.
Tonight..Wind variable less than 10 kt. Wind waves 2 ft or less. SWell W 1 to 2 ft at 12 seconds.
Tue..Wind variable less than 10 kt. Wind waves 2 ft or less. SWell W 1 ft at 12 seconds.
Tue night..Wind variable less than 10 kt. Wind waves 2 ft or less. SWell W 1 ft at 11 seconds.
Wed..Wind se 10 kt...becoming S in the afternoon. Wind waves 2 ft or less. SWell W 1 ft at 10 seconds.
Wed night..Wind S 10 kt. Wind waves 2 ft or less. SWell W 1 ft. Slight chance of rain in the evening, then rain likely after midnight.
Thanksgiving day..Wind W 10 kt. Gusts to 15 kt in the afternoon. Wind waves 2 ft or less. SWell W 1 to 2 ft. Chance of showers in the morning, then slight chance of showers in the afternoon.
Thu night..Wind nw 10 kt. Gusts to 15 kt in the evening. Wind waves 2 ft or less. SWell W 1 to 3 ft.
Fri..Wind N to 10 kt...becoming W 10 kt with gusts to 15 kt in the afternoon. Wind waves 2 ft or less. SWell W 2 to 3 ft.
Fri night..Wind nw 10 to 15 kt. Wind waves 3 ft. SWell W 2 to 3 ft. Slight chance of showers after midnight.
PZZ700 230 Am Pst Mon Nov 19 2018
Synopsis for the far southern california coast.. At 2 am, a 1026 mb high was over northern utah and a 1017 mb low was over the california bight. Weak onshore flow will develop in the afternoons early this week, with stronger onshore flow by mid- week. Gusts near 20 kt are expected on Friday. Showers are possible at times Wednesday through Friday.


7 Day Forecast for Marine Location Near Boulevard, CA
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location: 32.67, -116.31     debug


Area Discussion for - San Diego, CA
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Fxus66 ksgx 191637
afdsgx
area forecast discussion
national weather service san diego ca
836 am pst Mon nov 19 2018

Synopsis
It will be another mild and dry today with variable high clouds and
gusty east winds along the coastal foothills, elevating wildfire
potential. Low pressure off the coast today, will drift across the
region on Tuesday, helping to deepen the marine layer, along with
more low clouds and some cooling. Another weakening trough will
follow Wednesday night into Thursday. This system could generate
some light rain and showers along and west of the mountains sometime
Wednesday night into Thursday. Another system could generate some
light shower activity, mainly for san diego county on Saturday,
followed by a return of dry offshore flow and warming early next
week.

Discussion For extreme southwestern california including orange...

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

Elevated fire weather conditions continue inland today...

high clouds were spreading across socal from the west this morning
and aided in a colorful sunrise. Satellite imagery showed thicker
clouds moving into the ca bight which may challenge the weak
november Sun later today. The sfc pressure gradient has reached
nearly 10 mbs offshore (sw nv to ksan) this morning and is
supporting some gusty easterly winds below the passes and along
wind prone coastal slope and foothill areas. Numerous sites had
gusts over 25 mph, with peak gusts 35-40 mph. Far inland, it is
still very dry. See fire weather discussion below for details.

The 12z miramar sounding had a sfc-based inversion and indicated
warming of 1-2 degrees c below 5k ft.

The high clouds are spinning off an approaching low pressure area
several hundred miles offshore. Depending on the thickness of the
high clouds, it could be a bit warmer than currently forecast, but
differences do not justify a forecast update at this time.

Otherwise, the forecast looks on track.

From previous discussion...

Short term (today through Wednesday)
Satellite imagery also shows a low pressure system over the
eastern pacific centered near 30n 130w, roughly due west of
northern baja. This low pressure system will weaken and move
slowly eastward, moving inland across southern california and
northern baja on Tuesday. The high cloud shield with this system
will overspread southern california today. Frontal band
precipitation with this system is mostly expected to dissipate by
the time it reaches the coast.

A second, larger low pressure system over the eastern pacific will
continue to move toward the west coast. Precipitation from this
system is expected to reach the coast of northern and portions of
central california late Tuesday night and early Wednesday, then
move southward through the state for Wednesday and Wednesday
night. In the area of weak lower level warm advection ahead of the
cold front, some light precipitation could develop late Wednesday
into Wednesday evening in areas bordering los angeles county to
the east.

The cold frontal precipitation band is expected to reach point
conception late Wednesday afternoon, pushing eastward across
southern california Wednesday night and early Thursday. This front
is expected to be weakening as it moves eastward across southern
california with progressively lesser amounts as one moves east and
south of los angeles county.

While some lighter precipitation is possible late Wednesday
afternoon into Wednesday evening, the bulk of the precipitation
for areas east and south of los angeles county is expected from
late Wednesday evening through Wednesday night and early
Thursday. Across orange and southwestern san bernardino counties,
rainfall is expected to range from around one quarter inch near
the coast to one half to three quarters of an inch in the
mountains with locally greater amounts. Amounts are then expected
to decrease from north to south across san diego county with
around one tenth inch across southern san diego county. Rainfall
around one tenth to locally one quarter inch is expected across
high desert areas with mostly one tenth inch or less in lower
desert areas.

Long term (Thursday through Sunday)
Some showers may linger along and west of the mountains into
Thursday afternoon, mainly for the mountains and inland valleys.

Dry weather is expected for Thursday night and Friday under weak
high pressure. Another low pressure system will move inland
farther to the north, moving across the pacific northwest on
Friday and through the great basin on Saturday. As it does so, it
will strengthen the onshore flow across southern california. The
combination of that stronger onshore flow and weak instability
across the coastal waters from colder air aloft moving across the
warmer sea surface temperatures of the coastal waters, could bring
some scattered mostly light showers from the coastal waters
inland to mountains, mainly in san diego county as shown by the
ecmwf. Dry weather is then expected to prevail through Sunday with
gusty offshore winds possible Sunday.

Aviation
191600z... Coast valleys... Low stratus will return to coastal taf
sites after 07z, with bases 1,000-1,200 ft and tops to 1,500 ft.

Clouds may extend up to 10-15 mi inland locally, and result in vis 2-
4 sm in br with patches of fg in higher terrain obscured by clouds.

Clearing should occur by 17z tue, although sct-bkn high clouds above
20,000 ft will persist through the period.

Mountains deserts... Sct-bkn high clouds above 20,000 ft will persist
through the period. Expect unrestricted vis.

Marine
No hazardous marine weather is expected through Thursday. Wind gusts
near 20 kt are possible Friday, mainly across the outer coastal
waters.

Fire weather
Easterly winds are blowing this morning along the coastal slopes and
foothill areas. In the offshore wind-prone spots, speeds are 15 to
25 mph with gusts 30 to 35 mph. Peak gusts are around 40 mph.

Widespread rh values inland just after sunrise were running from 15-
20%. The most sites with near critical fire weather criteria were in
san diego county and below the san gorgonio pass. A few will be
critical this morning. The winds should peak in the next few hours,
then decrease through the afternoon, but fire weather conditions
will remain elevated through the day.

Tonight through Tuesday... Winds will remain from the east, but
weaker tonight, and slightly better rh recovery is expected. For
Tuesday, onshore flow will gradually build inland, along with rh
levels. A wetting rain could arrive late Wednesday night or Thursday
but rainfall amounts will be light.

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... 10 17
aviation marine... Rodriguez


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
TIXC1 - Tijuana River Reserve, CA 44 mi69 min WSW 5.1 67°F 1019 hPa54°F
SDBC1 - 9410170 - San Diego, CA 46 mi42 min 1017.2 hPa
46235 46 mi54 min 65°F2 ft

Wind History for USS MIDWAY South Navy Pier, San Diego, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Campo, CA9 mi62 minENE 19 G 26 miBreezy66°F19°F16%1015.8 hPa

Wind History from NJK (wind in knots)
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Last 24hrNE4NE5N5CalmNE3N4CalmCalmW3W6W7W7W5W5W6W6W7W5W4W8W5W4W5NW4
1 day agoCalmCalmSE5E4E4NE5N4NE4NE5N4W5W7W4W4NE3NE4W5W4S3CalmCalmCalm3Calm
2 days agoNE5NE4NE4NE5NE3E4SE3CalmW4W8W4W4SW4SW3W5S4SW3SW3CalmSE4CalmCalmCalm3

Tide / Current Tables for National City, San Diego Bay, California
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National City
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Mon -- 12:22 AM PST     0.86 feet Low Tide
Mon -- 02:36 AM PST     Moonset
Mon -- 06:21 AM PST     Sunrise
Mon -- 06:44 AM PST     5.85 feet High Tide
Mon -- 01:16 PM PST     0.82 feet Low Tide
Mon -- 02:56 PM PST     Moonrise
Mon -- 04:45 PM PST     Sunset
Mon -- 07:02 PM PST     4.73 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.911.62.63.955.75.85.44.53.32.21.30.811.62.63.74.44.74.53.82.81.9

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 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 (14,3,4,5)
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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.