Wednesday, April25, 2018 L-36.com


Marine Weather and Tides
Vandenberg AFB, CA

Version 3.4
What's New / NOTES
3/3/2018 - There is a new GOES Satellite for the east coast that required rewriting that part of the code. Please report any issues.
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.

Sunrise 6:15AMSunset 7:43PM Wednesday April 25, 2018 1:34 AM PDT (08:34 UTC) Moonrise 2:35PMMoonset 3:03AM Illumination 75% Phase: Waxing Gibbous; Moon at 10 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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PZZ673 Waters From Pt. Sal To Santa Cruz Island Ca And Westward 60 Nm Including San Miguel And Santa Rosa Islands- 810 Pm Pdt Tue Apr 24 2018
Tonight..NW winds 10 to 15 kt. Wind waves 2 ft or less. NW swell 5 to 6 ft at 14 seconds.
Wed..Winds nw 5 to 10 kt becoming 10 to 15 kt in the afternoon. Wind waves 2 ft or less. NW swell 5 to 6 ft at 15 seconds.
Wed night..NW winds 10 to 15 kt. Wind waves 2 ft or less. NW swell 5 to 6 ft at 14 seconds.
Thu..NW winds 10 to 15 kt, becoming 15 to 20 kt in the afternoon. Wind waves 2 to 3 ft. Mixed swell nw 5 ft at 13 seconds and S 3 ft at 15 seconds.
Thu night..NW winds 15 to 25 kt with gusts to 30 kt. Combined seas 6 to 7 ft dominant period 13 seconds.
Fri..NW winds 15 to 25 kt with gusts to 30 kt. Combined seas 6 to 8 ft dominant period 11 seconds.
Fri night..NW winds 20 to 30 kt. Combined seas 7 to 9 ft dominant period 11 seconds.
Sat..NW winds 20 to 30 kt with gusts to 35 kt. Combined seas 8 to 11 ft.
Sun..NW winds 20 to 30 kt with gusts to 35 kt. Combined seas 9 to 10 ft.
PZZ600 810 Pm Pdt Tue Apr 24 2018
Synopsis for the southern california coast and santa barbara channel including the channel islands national marine sanctuary and national park..At 02z...or 7 pm pdt...a 1035 mb surface high was about 1450 nm west of point conception, while a 1008 mb low was near needles...california. This pattern will change little through the middle of the week.

7 Day Forecast for Marine Location Near Vandenberg AFB, CA
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location: 34.55, -121.24     debug


Area Discussion for - Los Angeles/Oxnard, CA
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Fxus66 klox 250704
afdlox
area forecast discussion... Updated
national weather service los angeles oxnard ca
1204 am pdt Wed apr 25 2018

Synopsis 24 956 pm.

Partly cloudy, except for overnight coast and valley low clouds
and fog in an onshore flow through next week. A low should arrive
on Thursday to increase the onshore flow for a cooling trend.

Breezy northerly winds are possible from Friday to late Saturday.

Short term (wed-sat) 24 810 pm.

Southwest flow aloft will gradually increase across southwest
california during the next 24 hours as a large scale upper level
low presssure system slowly approaches the northern california
coast. Onshore flow pattern with maintain night and morning low
cloud fog pattern during next couple of days, with clearing
to the beaches expected each afternoon. 00z vandenberg
sounding showing marine layer depth around 1500 feet this
evening. Low clouds and fog are expected to move into most
coastal and coastl valley areas tonight into Wednesday morning,
potentially reaching the santa clarita valley by Thursday morning.

High temperatures will continue to gradually trend downward
across most coastal valleys areas Wednesday into Thursday due
to the increased onshore flow and marine layer influence.

Continued very warm temperatures will continue across the
antelope valley with highs reaching the mid to upper 80s.

*** from previous discussion ***
inland surface pressures gradually lower from 1018 mb today to 1013
mb Wednesday to 1008 mb Thursday resulting in stronger onshore flow
and stronger winds each day. The winds will strengthen each day with
gusty west winds across the foothills, mountains and the antelope
valley. Advisory level sundowner winds are likely for western
portions of the sba south coast Thursday evening, before becoming
more widespread across the region Thursday night into Friday
morning. The marine layer will deepen with night and morning low
clouds spreading farther inland each night.

Rain chances remain low. The trough axis moves across
northern central ca Thursday night and Friday with PVA and modest
instability, but the moisture fields will be the limiting factor in
any precip potential over the higher terrain. Will keep the forecast
dry at this time.

Long term (sun-wed) 24 331 am.

Below average confidence exists in the long term. A trough of low
pressure is poised to push through the region Friday, which will
likely weaken the marine inversion enough to wipe out the low
clouds, at least temporarily to the north of point conception.

Advisory level sundowner winds are likely for western portions of
the sba south coast Thursday evening, before becoming more
widespread across the region Thursday night into Friday morning.

This may help to limit the extent of low clouds south of point
conception, although the downsloping winds may be battling a
formidable eddy. A second piece of upper level energy may help to
reinforce the trough of low pressure overhead by early next week.

This will keep near to below normal temperatures across the region
during this time with gusty winds possible, especially across the
mountains. There is also a non-zero change for rain sometime late
this weekend into early next week, however given the time of year
and inconsistency in model runs, have kept pops below mentionable
levels for now.

Aviation 25 0704z.

At 0230z at klax, the marine layer was near 1000 feet deep. The
top of the inversion was near 2300 feet with a temperature around
19 c.

Moderate confidence in tafs. There is a 30 percent chc that lifr
cigs may be ifr and vice versa.VFR transitions could be off by
+ - 90 minutes. Good confidence in tafs 20z-02z.

Klax... Moderate confidence in taf. There is a 20 percent chc of
lifr CIGS 11z-15z.VFR transition may be as late as 20z.

Kbur... Moderate confidence in TAF from 10z-17z, otherwise very
good confidence in taf. There is a 30 percent chance of lifr cigs
12z-16z. There is a 20 percent chc of no cigs.

Marine 24 746 pm.

High confidence in winds and seas remaining below small craft
advisory levels across the waters through Wednesday. Winds will
likely increase Thursday afternoon through Saturday with
widespread advisory level winds and building short period seas.

Lox watches warnings advisories
Ca... None.

Pz... None.

Hazard potential outlook (sat-wed)
No significant hazards expected.

Public... Gomberg moede
aviation... Rorke
marine... Gomberg rorke
synopsis... Stu
weather.Gov losangeles


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
46218 - Harvest, CA (071) 25 mi35 min 54°F6 ft
46259 26 mi43 min 58°F8 ft
46011 - SANTA MARIA - 21 NM Northwest of Point Arguello, CA 30 mi45 min NW 7.8 G 9.7 53°F 56°F7 ft1017.6 hPa (+0.9)
PTGC1 - Point Arguello, CA 31 mi35 min N 5.1 G 6 51°F 1018.3 hPa (+1.7)
46054 - SANTA BARBARA W 38 NM West of Santa Barbara, CA 45 mi35 min NW 12 G 14 55°F1017.1 hPa (+1.4)
46215 - Diablo Canyon, CA (076) 49 mi38 min 54°F4 ft

Wind History for Port San Luis, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Lompoc, Vandenberg Air Force Base, CA38 mi40 minN 02.50 miFog/Mist49°F48°F97%1017.9 hPa

Wind History from VBG (wind in knots)
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Last 24hrCalmE4CalmCalmCalmCalmCalm--NW3------W8W7W7NW7NW6NW7--3NE3CalmCalmCalm
1 day agoCalmCalmE3CalmCalmCalmCalmCalmNW4CalmW5W7W8NW8NW7NW7NW5N6N4N4NE4CalmN4NE5
2 days agoSE3SE3CalmCalmCalmE3SE3CalmW3NW4N9NW9NW8NW6N8NW9N6N5N4NE4NE3NE3N4NE4

Tide / Current Tables for Point Arguello, California
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Point Arguello
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Wed -- 01:19 AM PDT     1.54 feet Low Tide
Wed -- 04:00 AM PDT     Moonset
Wed -- 06:18 AM PDT     Sunrise
Wed -- 07:06 AM PDT     4.33 feet High Tide
Wed -- 01:39 PM PDT     -0.31 feet Low Tide
Wed -- 03:32 PM PDT     Moonrise
Wed -- 07:42 PM PDT     Sunset
Wed -- 08:20 PM PDT     4.58 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
1.91.61.62.12.73.54.14.34.13.52.51.40.4-0.2-0.30.212.13.34.14.54.53.93

Tide / Current Tables for Oil Platform Harvest (Topex Project), California
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Oil Platform Harvest (Topex Project)
Click for Map
Wed -- 01:17 AM PDT     1.65 feet Low Tide
Wed -- 04:00 AM PDT     Moonset
Wed -- 06:19 AM PDT     Sunrise
Wed -- 06:57 AM PDT     4.60 feet High Tide
Wed -- 01:42 PM PDT     -0.23 feet Low Tide
Wed -- 03:32 PM PDT     Moonrise
Wed -- 07:42 PM PDT     Sunset
Wed -- 08:13 PM PDT     4.75 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
21.71.82.233.84.44.64.33.62.61.50.5-0.1-0.20.21.12.33.54.34.74.643.1

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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Wind Forecast for Los Angeles/Oxnard, CA (4,6,7,8)
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Ground Weather Radar Station Vandenberg AFB, 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.