Sunday, April23, 2017 L-36.com


Marine Weather and Tides
Hermosa Beach, CA

Version 3.4
What's New / NOTES
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.
3/12/2015 - Added section for Gulf current for users in the GMZ marine zones.
This was requested by a user. If you have requests, please let me know.

Sunrise 6:10AMSunset 7:32PM Sunday April 23, 2017 12:52 PM PDT (19:52 UTC) Moonrise 4:35AMMoonset 4:39PM Illumination 6% 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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PZZ655 Inner Waters From Point Mugu To San Mateo Pt. Ca Including Santa Catalina And Anacapa Islands- 807 Am Pdt Sun Apr 23 2017
.small craft advisory in effect from 3 pm pdt this afternoon through late tonight...
Today..Western portion...nw winds 5 to 10 kt...becoming 15 to 25 kt with gusts to 30 kt in the afternoon. Eastern portion winds variable 10 kt or less...becoming W 10 to 15 kt wit gusts to 20 kt in the afternoon. Combined seas 5 to 7 ft dominant period 8 seconds. Patchy fog in the morning.
Tonight..W to nw winds 15 to 25 kt with local gusts to 30 kt. Strongest western portion...becoming 10 to 20 kt late. Combined seas 7 to 9 ft dominant period 14 seconds.
Mon..W winds 10 to 15 kt...becoming W 15 to 25 kt in the afternoon. Combined seas 5 to 7 ft dominant period 13 seconds.
Mon night..W to nw winds 15 to 25 kt with local gusts to 30 kt...strongest western portion...becoming 10 to 15 kt late. Combined seas 7 to 9 ft dominant period 8 seconds.
Tue..W to nw winds 10 to 15 kt...becoming 15 to 25 kt with gusts to 30 kt in the afternoon. Combined seas 7 to 9 ft dominant period 8 seconds.
Tue night..W to nw winds 15 to 25 kt with gusts to 30 kt...becoming 10 to 15 kt late. Combined seas 8 to 11 ft dominant period 8 seconds...subsiding to 7 to 9 ft dominant period 8 seconds after midnight.
Wed..W to nw winds 10 to 15 kt early...becoming 15 to 25 kt with local gusts to 30 kt. Combined seas 7 to 10 ft.
Thu..W to nw winds 20 to 30 kt with local gusts to 35 kt. Combined seas 8 to 11 ft.
PZZ600 807 Am Pdt Sun Apr 23 2017
Synopsis for the southern california coast and santa barbara channel including the channel islands national marine sanctuary and national park..At 15z...or 8 am pdt...a 1024 mb high was located 600 nm W of point conception. A 1004 mb thermal trough was centered near las vegas. The high will strengthen and move northward through Mon. Widespread gale force winds are expected over the outer waters through much of the week.

7 Day Forecast for Marine Location Near Hermosa Beach, CA
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location: 33.85, -118.4     debug


Area Discussion for - Los Angeles/Oxnard, CA
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Fxus66 klox 231635
afdlox
area forecast discussion
national weather service los angeles/oxnard ca
935 am pdt Sun apr 23 2017

Synopsis
Dry northwest flow aloft will bring breezy conditions to the area
for most of the week. Near normal daytime temperatures expected
early this week with above normal temperatures likely later in
the week.

Update
Good cooling this morning compared to yesterday morning with most
reporting sites in southwestern california showing five to ten
degrees cooler readings. There were some high clouds passing
overhead through the night which might have kept temperatures up a
degree or two. However the weakened offshore flow and even a
developing onshore flow in some locations has made the most
difference. Afternoon temperatures across the region will still be
above normal at most locations but will be noticeably cooler to
folks engaging in outdoor activities.

The current forecast package looks on track and few notable
changes are expected. The two parameters that will likely be
tweaked are temperatures and winds. Temperatures will be tweaked
depending upon how much they drop today and how the cooling
progresses during the next few days before it begins to warm again
into next weekend. A moderately strong northwesterly flow will set
up over the region for the next few days and wind advisories will
likely be needed for the mountains as well as northwest wind
favored canyons and valleys.

Short term (tdy-tue)
the eddy did not spin up as forecast and as a result there are not
many low clouds south of point conception. NW flow has created
some low clouds for the central coast and the santa ynez vly.

Otherwise skies will be mostly sunny and MAX temps will be a
couple of degrees above normal but quite a few degrees cooler than
it was yesterday. Strong NW flow over the central coast will
create advisory level gusts this afternoon and evening. These
winds will funnel through canyons of the santa ynez range and
there will be advisory level gusts for the western half of the
santa ynez range and the sba south coast.

Strong NW flow will continue for Monday and Tuesday. There will
likely be advisory level gusts over the sba/vta/la mtns... The
antelope vly and the sba south coast. It will be dry and mostly
clear or at worst partly cloudy with the notable exception of the
north slopes near the kern county line on Monday night and Tuesday
morning where N flow will pile up clouds and create a slight chc
of a shower. MAX temps will hover right around seasonal normals

Long term (wed-sat)
an upper level trough will dive southeastward through the great
basin late Tuesday and will maintain the northwest flow across
southwest california. Wind advisory level gusts will continue
through the period for the northwest wind prone areas, especially
across southern santa barbara county, the central coast, and the
mountains. The northerly flow will bring some downslope warming
to coastal/valley areas during this period, with some areas
climbing into the 80s.

Better offshore flow is forecast for next weekend. It will be
breezy and MAX temps will be 5 to 10 degrees above normal.

Aviation 23/1600z...

at 1600z, the marine inversion at klax was based at 1600 feet. The
top of the inversion was 2500 feet at 17 degrees celsius.

Overall, moderate confidence in 18z TAF package. Through this
evening, high confidence inVFR conditions for all sites. For
tonight, low confidence in central coast tafs remainingVFR (40%
chance of MVFR/ifr conditions 08z-17z). For the coastal tafs south
of point conception, low confidence in forecast as there is a
50/50 chance of conditions remainingVFR or MVFR (08z-17z).

Gusty northwest winds will continue through the TAF period.

Northwest gusts to around 30 kt are likely at ksmx/ksbp 20z-04z
and westerly wind gusts around 35 kt are likely at kwjf/kpmd
19z-05z.

Klax... Moderate confidence in 18z taf. High confidence inVFR
conditions through this evening. For tonight, low confidence in
return of MVFR conditions after 10z (50% chance that airfield will
remainVFR).

Kbur... High confidence in 18z taf.VFR conditions are anticipated
through the period (with a 20% chance of MVFR/ifr CIGS 11z-16z).

Marine 23/830 am...

for the outer waters, high confidence in current forecast. Strong
northwest winds are anticipated to continue through the week.

Currently, gale warning is in effect through Monday night. Gale
force winds will likely continue through Thursday although there
may be a slight lull on Tuesday.

For the inner waters, moderate confidence in current forecast. For
the waters north of point sal, small craft advisory (sca) level
winds are expected each afternoon/evening through Thursday with a
20% chance of gale force gusts each day. For the waters south of
point conception, SCA level winds are expected each afternoon and
evening through Thursday with the strongest winds across western
sections. There will be a chance of 20% chance of gale force gusts
each day across western sections.

With the gusty winds, seas will be very choppy this week, making
for hazardous boating conditions through the week.

Lox watches/warnings/advisories
Ca... Beach hazards statement in effect through Monday evening for
zones 34-35-40-41-87. (see laxcfwlox).

Wind advisory in effect until 3 am pdt Monday for zones
34-35. (see laxnpwlox).

Wind advisory in effect until 3 am pdt Tuesday for zones
39-52. (see laxnpwlox).

Pz... Small craft advisory in effect until 3 am pdt Monday for
zones 645-650. (see laxmwwlox).

Small craft advisory in effect from 3 pm this afternoon to 3
am pdt Monday for zone 655. (see laxmwwlox).

Gale warning in effect until 3 am pdt Tuesday for zones
670-673-676. (see laxmwwlox).

Hazard potential outlook (tue-sat)
very gusty north to northwest winds are expected across southern
santa barbara county, the central coast, the i-5 corridor, and
the antelope valley. Advisory level winds expected at times and
possibly exceeding warning levels, especially in the i-5 corridor
and southern sb county Wednesday and Thursday.

Public... Kj/rorke
aviation... Rat
marine... Rat
synopsis... Munroe
weather.Gov/losangeles


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
PXAC1 9 mi52 min SSW 8 G 9.9
BAXC1 10 mi52 min S 4.1 G 6
OHBC1 - 9410660 - Los Angeles, CA 11 mi52 min 60°F1012.2 hPa (+0.3)
PSXC1 11 mi52 min S 7 G 8.9
PFDC1 12 mi52 min S 5.1 G 7
PFXC1 12 mi52 min SW 7 G 8 67°F
46221 - Santa Monica Bay, CA (028) 12 mi52 min 64°F5 ft
ICAC1 - 9410840 - Santa Monica Pier 12 mi52 min W 9.9 G 11 61°F 64°F1012.3 hPa (+0.0)
AGXC1 12 mi52 min SW 6 G 7 62°F 1012.1 hPa (+0.4)
PRJC1 14 mi52 min SSW 5.1 G 6
46256 15 mi30 min 62°F4 ft
46222 - San Pedro, CA (092) 17 mi63 min 63°F4 ft
46253 22 mi52 min 65°F4 ft
46025 - Santa Monica Basin - 33NM West Southwest of Santa Monica, CA 35 mi42 min NW 3.9 G 5.8 60°F 60°F1012.3 hPa57°F

Wind History for Los Angeles Berth 161,
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Los Angeles, Los Angeles International Airport, CA6 mi59 minW 1210.00 miA Few Clouds71°F57°F63%1011.7 hPa
Hawthorne, Hawthorne Municipal Airport, CA6 mi59 minno data10.00 miFair74°F54°F50%1011.5 hPa
Los Angeles / USC Campus Downtown, CA13 mi65 minVar 310.00 miFair80°F50°F35%1010.8 hPa
Long Beach, Long Beach Airport, CA13 mi59 minS 810.00 miFair74°F54°F50%1011.5 hPa
Santa Monica, Santa Monica Municipal Airport, CA13 mi61 minW 810.00 miFair68°F55°F65%1011.8 hPa
Los Alamitos U. S. Army Airfield, CA19 mi1.9 hrsS 410.00 miMostly Cloudy71°F57°F64%1012.1 hPa
Fullerton, Fullerton Municipal Airport, CA22 mi59 minS 510.00 miA Few Clouds76°F55°F50%1011 hPa
Burbank - Bob Hope Airport, CA24 mi59 minVar 610.00 miFair76°F46°F36%1010.2 hPa

Wind History from TOA (wind in knots)
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Last 24hrW16W14
G21
W15W13--------------------CalmCalmCalmCalmCalmCalmNW11NW15NW13NW14
1 day agoW18
G245
W18
G23
W13W9--------------------CalmS4CalmCalmCalm6--NW17NW15--
2 days agoW11
G20
--------------------------Calm4CalmCalmNW9NW8--W16W18W21
G25

Tide / Current Tables for King Harbor, Santa Monica Bay, California
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King Harbor
Click for Map
Sun -- 01:56 AM PDT     0.94 feet Low Tide
Sun -- 04:35 AM PDT     Moonrise
Sun -- 06:12 AM PDT     Sunrise
Sun -- 07:53 AM PDT     4.54 feet High Tide
Sun -- 02:07 PM PDT     0.05 feet Low Tide
Sun -- 04:39 PM PDT     Moonset
Sun -- 07:31 PM PDT     Sunset
Sun -- 08:26 PM PDT     5.01 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
1.81.20.91.21.92.83.74.34.54.23.42.31.30.40.10.312.23.44.44.94.94.33.3

Tide / Current Tables for Los Angeles Harbor, Mormon Island, California
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Los Angeles Harbor
Click for Map
Sun -- 01:53 AM PDT     0.85 feet Low Tide
Sun -- 04:34 AM PDT     Moonrise
Sun -- 06:12 AM PDT     Sunrise
Sun -- 07:51 AM PDT     4.61 feet High Tide
Sun -- 02:02 PM PDT     0.07 feet Low Tide
Sun -- 04:38 PM PDT     Moonset
Sun -- 07:30 PM PDT     Sunset
Sun -- 08:23 PM PDT     5.10 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
1.71.10.91.21.92.83.84.44.64.33.42.31.20.40.10.31.22.33.54.55.154.33.2

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 Los Angeles/Oxnard, CA (15,3,4,5)
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Ground Weather Radar Station Santa Ana Mtns, 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.