Thursday, April2, 2020
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Marine Weather and Tides
Lompoc, CA

Version 3.4
NOTICE
12/16/2019 NOAA is having trouble with requests that include wind gusts. I am posting graphs without wind gusts until it gets fixed.
10/9/2019 Updated the Marine Zones.
9/4/2019 Fixed the weather maps due to NOAA moving them.
7/25/2019 New feature in the Airports section gives a link to 5 minute updates for data reports.

Sunrise 6:44AMSunset 7:25PM Thursday April 2, 2020 8:42 PM PDT (03:42 UTC) Moonrise 12:27PMMoonset 2:15AM Illumination 76% 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- 817 Pm Pdt Thu Apr 2 2020
.small craft advisory in effect through late Friday night...
.gale watch in effect from Friday afternoon through late Friday night...
Tonight..NW winds 20 to 30 kt. Combined seas 9 to 10 ft dominant period 10 seconds, building to 9 to 12 ft dominant period 9 seconds after midnight.
Fri..NW winds 20 to 25 kt with gusts to 35 kt late in the afternoon. Combined seas 9 to 11 ft dominant period 9 seconds.
Fri night..NW winds 20 to 30 kt with gusts to 35 kt. Combined seas 10 to 12 ft dominant period 9 seconds.
Sat..NW winds 15 to 25 kt with gusts to 30 kt, becoming 15 to 20 kt with gusts to 25 kt in the afternoon. Combined seas 9 to 10 ft dominant period 9 seconds, subsiding to 7 to 8 ft dominant period 8 seconds in the afternoon.
Sat night..NW winds 15 to 25 kt with gusts to 30 kt, becoming W 10 to 20 kt with gusts to 25 kt after midnight. Combined seas 6 to 7 ft dominant period 7 seconds.
Sun..SW winds 15 to 20 kt with gusts to 25 kt. Combined seas 5 to 6 ft dominant period 7 seconds. Chance of rain.
Sun night..SW winds 10 to 15 kt with gusts to 20 kt. Wind waves 1 to 3 ft. W swell 5 to 6 ft at 9 seconds. Rain and slight chance of tstms.
Mon..W winds 10 to 15 kt. Wind waves 2 ft or less. W swell 5 to 6 ft. Chance of showers.
Tue..NW winds 10 to 15 kt with gusts to 20 kt. Wind waves 1 to 3 ft. W swell 5 to 7 ft. Slight chance of showers.
PZZ600 817 Pm Pdt Thu Apr 2 2020
Synopsis for the southern california coast and santa barbara channel including the channel islands national marine sanctuary and national park..At 03z, or 8 pm pdt, a 1031 mb surface high was 700 nm W of point conception and a weak trough of low pres was over the S california bight. This persistent pattern will maintain moderate to strong nw winds and steep seas through Saturday.


7 Day Forecast for Marine Location Near Lompoc, CA
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location: 34.38, -120.53     debug


Area Discussion for - Los Angeles/Oxnard, CA
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FXUS66 KLOX 030141 AAA AFDLOX

Area Forecast Discussion . UPDATED National Weather Service Los Angeles/Oxnard CA 641 PM PDT Thu Apr 2 2020

SYNOPSIS. 02/336 PM.

Temperatures will remain near normal through Friday. Overnight to morning areas of fog are expected for coastal LA County tonight, with low clouds spreading well inland for areas south of Point Conception Friday night into early Saturday. By Sunday, a storm system will bring rain and cooler temperatures to the area. Rain will spread over the region from north to south Sunday and Monday.

SHORT TERM (TDY-SUN). 02/150 PM.

Synoptically, the area is under dry northwesterly flow with 500-mb heights around 570DM near the base of a trough. Another night of low stratus and fog is expected in Los Angeles County, but with less inland extent than this morning. Flow will become more zonal by Saturday evening as a low pressure system drops southwards from the Gulf of Alaska. By Sunday this 530DM feature will be off the CA-OR border and bringing clouds and then rain into the whole CWA.

Downtown LA made it to 70 which is only a degree below seasonal normal, but that will probably be the highest this week. There will be less marine layer tonight as offshore flow sets up with surface higher pressure developing over southern Nevada. There will be enough of an eddy left over to bring some low clouds to the LA coast and San Gabriel Vly. The northerly offshore flow will likely bring isolated low-end advisory gusts across the western Santa Barbara County south coast and the I-5 corridor.

Friday will be mostly sunny after a little bit of morning stratus. Heights will begin to fall Friday night along with increasing onshore trends will bring back the marine layer stratus deck that will cover much of the Ventura and south Santa Barbara coasts and valleys. Forecast weak offshore flow from KBFL to KSMX will likely keep the clouds away from the Central Coast.

Skies will become increasingly cloudy Saturday with mid and higher level clouds through the day as the upper low approaches from the NW. Afternoon temperatures will cool 2 to 4 degrees and fall below seasonal normal. The 530 DM upper low will move to a position 80 miles west of the OR/CA state line late Saturday night. Moist westerly flow will move over the Central Coast and there is a chance that light rain will develop over SLO county after midnight.

Model solutions move the low slowly on Sunday but the moist cyclonic flow will overspread all of SoCal. Heights will fall to 556 DM and it will be a cloudy day. Afternoon temperatures will be in the 60s across all non-mountain areas. Light rain will likely fall over SLO and SBA counties. There is a chance Ventura and LA Counties will see some rain in the afternoon as well.

LONG TERM (MON-THU). 02/150 PM.

Things get interesting with the storm Sunday night and Monday. The low will bring PVA, sub-tropical jet dynamics, and strengthening southwesterly flow. The system also looks to entrain a small plume of moisture from the Pacific. Rain will almost certainly spread over the entire area Sunday night. The period of most intense rain will be between midnight Sunday and noon Monday. During this time there will be good southerly low level flow which will greatly enhance the rainfall rates and totals over the south facing slopes from Santa Ynez range to the San Gabriels. The heavier rain will move out of SLO and northern SBA counties by early in the afternoon and will end over LA county late in the afternoon. Showers will continue overnight as the upper low will remain near the area.

Still thinking the areas of the coasts and valleys not producing orographic lift should get about an inch of rain plus or minus a few tenths. The south facing slopes from SBA to LA county should receive 2 to 3 inches of rain. The interior will likely see a half to three quarters of an inch.

There will be snow with this system and snow levels will be low for April but still not expecting snow on the major passes. Snow levels are expected to start out at 6000' and then lower to about 4500 ft by Monday. This storm will likely bring quite a bit of snow to elevations above 6000 feet.

Tuesday through Thursday evening looks to bring isolated showers and possible afternoon thunderstorms in the colder airmass. Afternoon temperatures will be likely be 10 to 20 degrees below normal through the extended period under cloudy skies.

AVIATION. 03/0138Z.

At 01Z at KLAX, there was deep moist layer up to around 5000 feet.

Moderate-to-high confidence in the current forecast. There is a slight chance to chance of IFR to MVFR conditions between 08Z and 16Z, highest for Los Angeles County coastal terminals.

KLAX . There is a 50 percent chance of IFR to MVFR conditions between 11Z and 16Z, otherwise VFR conditions are expected through the period. Any east winds will remain less than 7 knots.

KBUR . There is a 20 percent chance of IFR conditions between 13Z and 15Z, otherwise VFR conditions are expected through the period.

MARINE. 02/151 PM.

High confidence in the current forecast. Strong northwest flow will persist through the remainder of the week, keeping at least Small Craft Advisory (SCA) level conditions over the outer waters from the Central Coast to San Nicolas Island through Saturday. These winds will generate a short period steep swell over ALL coastal waters through Saturday. Gale force gusts are likely to continue over the southern portion from Point Conception to San Nicolas Island through this morning. There is a 50% chance of gale force gusts this afternoon and evening and again on Friday, especially for the southern portion. The gusty northwest flow will also likely bring SCA level conditions to the western portion of the Santa Barbara Channel for the afternoon and evening hours today and Friday. After Saturday, conditions will likely remain below SCA level everywhere.

SE winds will also impact the San Pedro Channel each morning through Saturday, and could locally approach 15 kt at times. A storm system is expected early next week bringing a chance of rain over all of the coastal waters.

LOX WATCHES/WARNINGS/ADVISORIES. CA . NONE. PZ . Small Craft Advisory in effect until 3 AM PDT Friday for zones 645-650. (See LAXMWWLOX). Small Craft Advisory in effect until 3 PM PDT Saturday for zone 670. (See LAXMWWLOX). Small Craft Advisory in effect until 3 AM PDT Saturday for zones 673-676. (See LAXMWWLOX).

.HAZARD POTENTIAL OUTLOOK (SUN-THU).

Rain, possibly heavy at times, and mountain snow above 4500 feet are expected Sunday through Monday with a chance of showers lingering through the week - potentially causing road hazards.



PUBLIC . jld AVIATION . Hall MARINE . Sweet SYNOPSIS . Smith

weather.gov/losangeles


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
46054 - SANTA BARBARA W 38 NM West of Santa Barbara, CA 8 mi33 min NW 23 G 29 55°F 54°F1015.7 hPa48°F
HRVC1 10 mi55 min 54°F 1017.2 hPa
46218 - Harvest, CA (071) 14 mi43 min 55°F10 ft
PTGC1 - Point Arguello, CA 15 mi43 min N 20 G 22 54°F 1016.7 hPa (+0.0)
46053 - E. SANTA BARBARA - 12NM Southwest of Santa Barbara, CA 37 mi33 min WNW 14 G 18 59°F 57°F1014.5 hPa51°F
NTBC1 - Santa Barbara, CA - 9411340 44 mi67 min N 1.9 G 4.1 59°F 1014 hPa
46011 - SANTA MARIA - 21 NM Northwest of Point Arguello, CA 47 mi33 min NNW 23 G 27 55°F 56°F1017.1 hPa47°F

Wind History for Santa Barbara, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Lompoc, Lompoc Airport, CA20 mi1.8 hrsWNW 12 G 1910.00 mi55°F42°F62%1016.6 hPa

Link to 5 minute data for KLPC

Wind History from LPC (wind in knots)
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Last 24hrW8W10W10W10W7W9CalmCalmCalmE3NE3CalmCalmCalmSW4N11
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Tide / Current Tables for Gaviota, California
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Gaviota
Click for Map
Thu -- 03:13 AM PDT     Moonset
Thu -- 05:23 AM PDT     4.28 feet High Tide
Thu -- 06:45 AM PDT     Sunrise
Thu -- 01:05 PM PDT     -0.06 feet Low Tide
Thu -- 01:25 PM PDT     Moonrise
Thu -- 07:23 PM PDT     Sunset
Thu -- 08:10 PM PDT     3.52 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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2.933.33.74.14.34.23.93.32.51.60.70.2-0.10.10.61.32.12.83.33.53.43.12.8

Tide / Current Tables for Cuyler Harbor, San Miguel Island, California
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Cuyler Harbor
Click for Map
Thu -- 03:13 AM PDT     Moonset
Thu -- 05:18 AM PDT     4.19 feet High Tide
Thu -- 06:46 AM PDT     Sunrise
Thu -- 01:02 PM PDT     -0.06 feet Low Tide
Thu -- 01:27 PM PDT     Moonrise
Thu -- 07:23 PM PDT     Sunset
Thu -- 08:04 PM PDT     3.44 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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2.833.33.744.24.13.83.22.31.50.70.1-0.10.10.61.32.12.83.33.43.332.7

Weather Map
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GEOS 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 (23,6,7,8)
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Ground Weather Radar Station Vandenberg AFB, CA
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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 numerous 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.