Wednesday, September26, 2018 L-36.com


Marine Weather and Tides
Signal Hill, CA

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9/17/2018 XTide broke when 1and1 "upgraded" my server. It has been esculated. I am sorry for the problem.

Sunrise 6:43AMSunset 6:44PM Wednesday September 26, 2018 3:52 AM PDT (10:52 UTC) Moonrise 8:04PMMoonset 8:06AM Illumination 97% Phase: Waning Gibbous; Moon at 16 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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PZZ655 Inner Waters From Point Mugu To San Mateo Pt. Ca Including Santa Catalina And Anacapa Islands- 255 Am Pdt Wed Sep 26 2018
Today..NW winds 5 to 10 kt, becoming W 10 to 15 kt in the afternoon. Wind waves 2 ft or less. Mixed swell W 2 ft at 6 seconds and S 2 ft at 15 seconds. Patchy fog in the morning.
Tonight..W winds 10 to 15 kt in the evening, becoming variable 10 kt or less. Wind waves 2 ft or less. Mixed swell W 2 ft at 6 seconds and S 2 ft at 15 seconds.
Thu..Winds variable 10 kt or less, becoming W 10 kt in the afternoon. Wind waves 2 ft or less. Mixed swell W 2 ft at 6 seconds and S 2 ft at 15 seconds.
Thu night..W winds 10 kt in the evening, becoming variable 10 kt or less. Wind waves 2 ft or less. Mixed swell W 2 to 3 ft at 6 seconds and S 2 ft at 15 seconds.
Fri..Winds variable 10 kt or less, becoming W 10 kt in the afternoon. Wind waves 2 ft or less. Mixed swell W 2 ft at 6 seconds and S 2 ft at 14 seconds.
Fri night..W winds 5 to 10 kt. Wind waves 2 ft or less. Mixed swell W 2 to 3 ft at 5 seconds and S 2 ft at 14 seconds.
Sat..W winds 10 to 15 kt. Wind waves 2 ft or less. Mixed swell W 2 ft and S 2 to 4 ft.
Sun..W winds 10 to 15 kt. Wind waves 2 ft or less. S swell 3 to 5 ft.
PZZ600 255 Am Pdt Wed Sep 26 2018
Synopsis for the southern california coast and santa barbara channel including the channel islands national marine sanctuary and national park..At 08z...or 1 am pdt, a 1031 mb high was located 500 nm W of seattle. A 1011 mb low was located near yuma, arizona. A large south swell event is becoming more probable starting Sunday.


7 Day Forecast for Marine Location Near Signal Hill, CA
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location: 33.76, -118.18     debug


Area Discussion for - Los Angeles/Oxnard, CA
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Fxus66 klox 261023
afdlox
area forecast discussion
national weather service los angeles oxnard ca
323 am pdt Wed sep 26 2018

Synopsis 26 247 am.

Low clouds and fog will shrink and be limited to most coastal
areas over the next few days before expanding back into the
valleys this weekend. A brief but significant warming trend is
expected today and Thursday. A cooling trend is expected late this
week into this weekend as an area of low pressure moves into the
region.

Short term (tdy-fri) 26 319 am.

Latest fog product imagery indicated plenty of low clouds
affecting coastal areas from around san luis obispo to the orange
county border. As expected, the marine layer depth which was over
2200 ft last evening, has begun to shrink down to around 1200 ft
around lax this morning. The combination of an upper level ridge
building in from the southwest and weaker onshore flow for today
has already caused the morning stratus to quickly scour out of
much of the l.A. County valleys this morning. Some random patchy
low clouds could develop across the san gabriel valley early this
morning, but would be short lived.

In fact, some light offshore winds have developed early this
morning across the mountains and deserts, extending into some of
the interior valleys. Offshore wind speeds will be relatively
light, but some isolated gusts between 25 and 30 mph in favored
mountain locations will occur today. This offshore component
combined with the upper level ridge of high pressure will result
in a faster burnoff of the low clouds and bring substantial
warming across interior sections. With the weaker offshore trends
over the region today, expect highs to range between 8 to 15
degrees warmer in some l.A. And ventura county valleys todays
while coastal areas rise 4 to 10 degrees. Otherwise expect 2 to 6
degrees of warmer for most all other locations today. Highs are
expected to reach into the 90s for many valley, lower mountain
elevations, and the antelope valley, with a few degrees of warming
on Thursday as the ridge strengthens in the short term ahead of
an approaching upper level trough. Highs should remain the same
for most areas N of point conception and a couple degrees warmer
overall for areas to the south. Low clouds will push in once
again, but should remain to coastal areas, and possibly just sneak
into the san gabriel and san fernando valleys, but not that
confident for that to occur tonight into Thu morning.

A cooling trend will begin Friday, but not quite as much as first
expected. A shortwave ridge will remain in place ahead of the
approaching trough but weaken some. However, onshore gradients
will increase which will bring widespread cooler conditions to
the forecast area. The seabreeze will kick in earlier across the
coast then spread inland into the valleys. Expect 4 to 8 degrees
of cooling for the most part. The marine layer will deepen and low
clouds will make a return to the coastal valleys once again by
Friday night into Sat morning.

Tropical storm rosa will likely be upgraded to a hurricane today
and then become a major hurricane by noon Thursday. There will be
the potential that remnants from rosa could bring some moisture to
the region by early next week. However, it is a complex weather
pattern.

Long term (sat-tue) 26 322 am.

Both the GFS and ECMWF are in decent agreement through this
weekend as an upper trough will persist over the forecast area
allowing decent onshore flow, night through morning low clouds and
fog for coast and coastal valleys. Highs should be around normal
this weekend.

As mentioned in the previous long term forecast discussion,
confidence really drops off by Monday as a complex upper level
pattern sets up across the west coast and models are coming up
with quite different solutions. Tropical storm rosa is expected to
be upgraded to a hurricane over the next 24 hours. There are
several factors that do come into play next week. With an upper
trough situated off the california coast, the potential for
remnants of rosa could get pulled into to southern california by
Monday and bring a continuous subtropical fetch of moisture across
the forecast area for a few days before the upper trough pushes
through the area. The european model is trending in that
direction. While the GFS is much quicker pushing through a trough
keeping the bulk of the moisture to the east of the area into se
cal and arizona. Some of the GFS ensembles do show a slight
chance for some rain potential across the SE portion of the
forecast area mon-tue. However, solutions continue to vary quite a
bit run to run and there's a very large spread in the ensembles.

In respect to the models, the spread between the models remains
quite high.

If models trend more to the gfs, there could be some gusty
offshore winds early next week with the placement of what is left
of rosa, with limited moisture to tap into. Again, will have to
see how the models finally trend.

The best chance for any precipitation here will probably be from
the upper trough approaching from the west but there are a number
of complicating factors with that too, including how much moisture
will be available, timing, and strength. And model solutions will
likely change several times between now and next week. In
following the earlier forecast, have kept small precip chances
in the forecast for next Monday and Tuesday, and added Wednesday
as well. As we get closer to this weekend models, should get a
better handle on the situation, but that being said, models have a
bias of not being very reliable with handling subtropical fetches
from the south. It should be a very interesting week ahead
pinning down the details. Stay tuned.

Aviation 26 0627z.

At 0545z at klax, the marine layer was near 1500 feet deep. The
top of the inversion was around 3700 feet with a temperature of
25 degrees celsius.

Good confidence in cstl vly tafs through 14z then moderate
confidence 14z-20z due to uncertainty in clearing times which
could be off by as much as 2 hours. Good confidence again after
20z.

Klax... Moderate confidence in clearing time with near equal chcs
between 18z and 20z. Good confidence inVFR conds aft 17z. Good
confidence in no east wind component greater than 5 kt.

Kbur... Moderate confidence in clearing time with near equal chcs
between 15z and 17z. Good confidence inVFR conds aft 17z.

Marine 26 158 am.

For the outer waters, moderate to high confidence in wind and sea
conditions remaining below small craft advisory levels (sca)
through Friday. There is a 30 percent chance of small craft
advisory winds for the outer waters near point conception
this evening, and again Friday afternoon and evening.

No SCA issues expected for the inner waters through at least
Friday, and likely through the weekend.

Areas of dense fog with visibility one nautical mile or less will
likely affect portions of the coastal waters N of point
conception, including the nearshore waters north of point sal,
this morning.

A large south swell event is becoming more likely starting over
the weekend.

Lox watches warnings advisories
Ca... None.

Pz... None.

Hazard potential outlook (fri-tue)
No significant hazards expected.

Public... Kaplan
aviation... Rorke
marine... Rorke
synopsis... Kaplan
weather.Gov losangeles


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
PRJC1 2 mi34 min SW 4.1 G 6
PSXC1 2 mi34 min W 4.1 G 5.1
PFXC1 2 mi34 min SSW 1.9 G 2.9 65°F
BAXC1 3 mi40 min WNW 2.9 G 4.1
46256 4 mi52 min 66°F2 ft
PFDC1 4 mi34 min SE 1.9 G 2.9
PXAC1 5 mi34 min WNW 1.9 G 2.9
AGXC1 5 mi34 min SW 4.1 G 4.1 64°F 1013.9 hPa
OHBC1 - 9410660 - Los Angeles, CA 6 mi34 min 1014 hPa
46222 - San Pedro, CA (092) 12 mi52 min 69°F2 ft
46253 13 mi22 min 69°F2 ft
ICAC1 - 9410840 - Santa Monica Pier 24 mi34 min W 1.9 G 5.1 63°F 70°F1014.1 hPa
46221 - Santa Monica Bay, CA (028) 25 mi52 min 67°F3 ft
46262 44 mi52 min 70°F3 ft
46025 - Santa Monica Basin - 33NM West Southwest of Santa Monica, CA 46 mi32 min NW 7.8 G 9.7 64°F 69°F1013.7 hPa63°F

Wind History for Los Angeles Pier S, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Long Beach, Long Beach Airport, CA5 mi59 minNW 58.00 miOvercast63°F60°F90%1013.8 hPa
Fullerton, Fullerton Municipal Airport, CA13 mi59 minN 07.00 miFair63°F57°F84%1013.3 hPa
Hawthorne, Hawthorne Municipal Airport, CA14 mi59 minSW 48.00 miOvercast64°F60°F87%1013.9 hPa
Los Angeles, Los Angeles International Airport, CA17 mi59 minW 49.00 miOvercast64°F60°F87%1013.7 hPa
John Wayne-Orange County Airport, CA17 mi59 minN 08.00 miOvercast65°F59°F81%1013.5 hPa
Los Angeles / USC Campus Downtown, CA19 mi65 minN 08.00 miFair64°F59°F84%1013.4 hPa
Santa Monica, Santa Monica Municipal Airport, CA24 mi61 minWSW 49.00 miOvercast67°F60°F79%1013.8 hPa

Wind History from LGB (wind in knots)
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Last 24hr3N3NW4N44N3CalmCalmNW4S5SW5S9S9NW9W8NW8NW8NW9NW6NW6NW6NW7NW3NW5
1 day agoCalmSE4SE4SE5S3SW6CalmCalmSW7S8S85S7SW8S7S5S5CalmN5NE3NW5N5N4NW5
2 days agoNW4NW3NW3NW3NW43S7CalmSE4S8S8S8S7NW9NW6NW8W6NW6NW4NW3NW4N3CalmCalm

Tide / Current Tables for Long Beach, Outer Harbor, Pier A, California
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Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.


Tide / Current Tables for Los Angeles, California
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Tide / Current data from XTide NOT FOR NAVIGATION
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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 Los Angeles/Oxnard, CA (6,6,7,8)
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Ground Weather Radar Station Santa Ana Mtns, 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.