Friday, January19, 2018 L-36.com


Marine Weather and Tides
La Quinta, 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 6:47AMSunset 5:04PM Thursday January 18, 2018 9:50 PM PST (05:50 UTC) Moonrise 8:51AMMoonset 7:44PM Illumination 6% Phase: Waxing Crescent; Moon at 2 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- 204 Pm Pst Thu Jan 18 2018
.gale watch in effect from Friday afternoon through Saturday evening...
Tonight..Wind variable less than 10 kt...becoming sw to 10 kt after midnight. Wind waves 2 ft or less. SWell W 4 to 7 ft at 18 seconds. Patchy fog with vsby 1 nm or less in the evening.
Fri..Wind W to 10 kt...becoming 10 to 20 kt in the afternoon. Wind waves 2 ft or less...becoming 3 to 4 ft in the afternoon. SWell W 5 to 8 ft at 16 seconds. Slight chance of showers.
Fri night..Wind nw 15 to 25 kt with gusts to 30 kt. Wind waves 7 ft. SWell W 4 to 7 ft at 15 seconds. Slight chance of showers in the evening.
Sat..Wind nw 15 to 25 kt with gusts to 30 kt. Combined seas 8 ft dominant period 15 seconds...building to 10 ft dominant period 9 seconds in the afternoon.
Sat night..Wind nw 10 to 20 kt with gusts to 30 kt. Wind waves 5 ft. SWell W 5 to 8 ft at 12 seconds.
Sun..Wind E 10 kt with gusts to 15 kt in the morning...becoming variable less than 10 kt. Wind waves 2 ft or less. SWell W 4 to 6 ft.
Sun night..Wind N 10 kt with gusts to 15 kt. Wind waves 3 ft in the evening...becoming 2 ft or less. SWell W 3 to 4 ft.
Mon..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.
Mon night..Wind nw 10 to 15 kt with gusts to 20 kt. Wind waves 4 ft. SWell W 1 to 3 ft.
Tue..Wind W to 10 kt. Wind waves 2 ft or less. SWell W 2 to 3 ft.
Tue night..Wind nw 10 kt in the evening... Becoming variable less than 10 kt. Wind waves 2 ft or less. SWell W 2 to 3 ft.
PZZ700 204 Pm Pst Thu Jan 18 2018
Synopsis for the far southern california coast..At 1 pm, onshore flow will increase through Friday as a storm moves into the coastal waters. This will bring some gale-force winds and hazardous seas late Friday through Saturday. Weaker northwest winds and smaller swell will follow Sunday and Monday.

7 Day Forecast for Marine Location Near La Quinta, CA
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location: 33.64, -116.27     debug


Area Discussion for - San Diego, CA
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Fxus66 ksgx 190349
afdsgx
area forecast discussion
national weather service san diego ca
749 pm pst Thu jan 18 2018

Synopsis
Partly to mostly cloudy skies will prevail through Friday morning
with low clouds, patchy fog, and drizzle possible overnight. A
fast-moving low pressure system will move across the area Friday
through Saturday bringing much cooler temperatures, a few
showers, light snow in the mountains, and gusty winds in the
mountains and deserts. The storm system will depart the area
early next week with a return to dry weather and a gradual
moderation in temperatures.

Discussion For extreme southwestern california including orange...

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

Update...

the forecast remains on track with the main weather story being an
incoming upper level trough from the pacific. This will be a cold
system with noticeably colder weather for southern california
Friday and through the weekend. Temps will continue on the cool
side even into the first part of next week while some gradual
moderation of temps occurs.

The system will be fast moving and moisture will be limited. Gfs
shows MAX pw at only around 0.85 inches with continued dry air in
the mid levels. This will limit precip amounts projected to be
0.15 inches or less west of the mountains. Some high res model
runs show many areas west of the mountains not even receiving
measurable precip, which seems possible. However, decided not
to lower QPF as it is already forecast to be low. The bulk of the
precip will be in the mountains where around 0.25-0.50" of precip
is forecast along with a few inches of snow at higher elevations.

The snow levels will fall to about 3500 ft by Friday night.

No changes were made to the forecast this evening.

Previous discussion (issued at 302 pm pst Thu jan 18 2018)...

an aggressive afternoon seabreeze blowing through the valleys
this afternoon is dropping temperatures significantly and bringing
increased haze along the foothills. A coastal eddy spun up
earlier today generating low clouds along the san diego county
coastline. This activity has again pushed into the coast... Further
north into northern san diego county and southern orange county.

Deeper marine layer will develop later tonight with patchy drizzle
developing near the coast and mesas as the cold pacific trough
approaches the region. By Friday afternoon this trough will
move through southern california and bring a period of strong
westerly winds over the mountains, and light precipitation for the
coast, valleys, and mountains. The deserts will see gusty winds
but not likely to reach wind advisory criteria and little or no
precipitation. Overall precipitation amounts will be low with this
one without good moisture transport parameters.

The main concern with the incoming trough, besides the gusty
winds, will be light rain causing wet road concerns for the
cities, and accumulating snowfall down to around 3500 feet Friday
night through Saturday morning (pass level) which could create
some slick spots on the roads. Although only a few inches of snow
are expected, the slick roads will have the potential to bring
significant travel hazards and delays.

A couple of weak troughs will move through next week but the
models are indicating weak moisture transport at best so there are
no chances for precip in the forecast through next week. The first
trough will come through on Monday with a decaying front and will
keep temperatures near normal. Another trough will come through
around Thursday with another period of gusty winds and cooler
temperatures but no precip expected at this time.

Aviation
190300z... Coast valleys... Patches of low clouds and fog along the
coast not currently impacting TAF sites. Cloud bases are around 1000
ft msl and the fog is locally restricting vis to 3-5 miles in a few
locations. Expect low clouds and fog to increase in coverage after
06z. Bkn-ovc CIGS 1000-1500 ft msl could impact coastal TAF sites
til 12z. Aft 12z, ceilings will likely lift to 2000-2500 ft
msl through about 21z then CIGS lift to 3000 ft msl or higher.

Mountains deserts... Variable high clouds into tonight then
increasing clouds by midday Friday, with higher terrain obscured.

Strong southwest winds will develop Friday afternoon, producing mdt-
strong up downdrafts and llws over and east of the mtns.

Marine
Patches of fog with visibility 1 nm or less this evening, improving
overnight. A storm arriving Friday will bring periods of gale-force
winds and hazardous seas late Friday through Saturday. Refer to the
gale watch for details.

Beaches
Northwest swell and surf will increase tonight through Friday. High
surf will peak Friday night into Saturday morning before diminishing
late Saturday. Consult the high surf advisory for details.

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

Sgx watches warnings advisories
Ca... Winter weather advisory from 5 pm Friday to noon pst Saturday
for riverside county mountains-san diego county mountains.

Winter weather advisory from 2 pm Friday to noon pst Saturday
for san bernardino county mountains.

High surf advisory until 8 pm pst Saturday for orange county
coastal areas-san diego county coastal areas.

Pz... Gale watch from Friday afternoon through Saturday evening for
coastal waters from san mateo point to the mexican border
and out to 30 nm-waters from san mateo point to the mexican
border extending 30 to 60 nm out including san clemente
island.

Public... Gregoria (update) brotherton (prev discussion)
aviation marine... Pg


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
46242 - Camp Pendleton Nearshore, CA (043) 68 mi53 min 62°F4 ft
46224 - Oceanside Offshore, CA (045) 71 mi51 min 62°F4 ft

Wind History for La Jolla, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Palm Springs, Jacqueline Cochran Regional Airport, CA5 mi59 minNNW 310.00 miFair57°F41°F55%1016 hPa
Palm Springs Regional Airport, CA18 mi58 minNNW 710.00 miFair63°F42°F47%1017.6 hPa

Wind History from TRM (wind in knots)
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Last 24hrCalmN4CalmNW3NE3NE4CalmNW4CalmW5CalmN5NW3CalmSE3SE6S7SE5SE4E3S3CalmN4N3
1 day agoCalmNE5N4NW4N5N3CalmNW4CalmNW3CalmCalmCalmCalm3CalmSE75S5S4CalmN3NW4NW3
2 days agoN7N4NE3W8N3N5NW4CalmN4SW3N3SW3CalmSE4CalmSE3S33E3CalmW3E4CalmN3

Tide / Current Tables for San Clemente, California
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San Clemente
Click for Map
Fri -- 03:39 AM PST     1.84 feet Low Tide
Fri -- 06:53 AM PST     Sunrise
Fri -- 08:33 AM PST     Moonrise
Fri -- 09:42 AM PST     5.49 feet High Tide
Fri -- 04:48 PM PST     -0.37 feet Low Tide
Fri -- 05:09 PM PST     Sunset
Fri -- 07:45 PM PST     Moonset
Fri -- 11:11 PM PST     3.82 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
3.52.92.31.91.92.233.94.85.45.554.12.91.60.5-0.2-0.400.81.82.83.53.8

Tide / Current Tables for La Jolla, Scripps Pier, California
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La Jolla
Click for Map
Fri -- 03:35 AM PST     2.03 feet Low Tide
Fri -- 06:50 AM PST     Sunrise
Fri -- 08:30 AM PST     Moonrise
Fri -- 09:40 AM PST     5.46 feet High Tide
Fri -- 04:47 PM PST     -0.33 feet Low Tide
Fri -- 05:09 PM PST     Sunset
Fri -- 07:44 PM PST     Moonset
Fri -- 11:19 PM PST     3.83 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
3.532.52.12.12.43.144.85.35.454.12.91.60.5-0.2-0.300.81.82.83.53.8

Weather Map and Satellite Images
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Weather Map
wmap_P
IR Satellite Image from GEOS
west_satellite

GOES Local Image of Southwest    EDIT
Geos

Wind Forecast for San Diego, CA (0,6,7,8)
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Ground Weather Radar Station San Diego, CA
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weather_mapweather_map weather_map

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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.