Monday, April19, 2021
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Marine Weather and Tides
Pismo Beach, CA

Version 3.4
NOTICE
1/26/2021 -- The West Coast Satellite images havd been updated. They now use GEOS-17.
1/1/2021 -- The 7 day forecast are now working well. Thank you NOAA for your support.

Sunrise 6:23AMSunset 7:39PM Monday April 19, 2021 2:14 PM PDT (21:14 UTC) Moonrise 10:42AMMoonset 12:53AM Illumination 54% Phase: First Quarter Moon; Moon at 8 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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PZZ645 Point Piedras Blancas To Point Sal Westward Out To 10 Nm- 206 Pm Pdt Mon Apr 19 2021
.small craft advisory in effect through Tuesday evening...
Tonight..NW winds 15 to 25 kt with gusts to 30 kt. Combined seas 5 to 7 ft dominant period 9 seconds. Patchy fog after midnight.
Tue..NW winds 15 to 25 kt, becoming 20 to 30 kt in the afternoon. Combined seas 7 to 9 ft dominant period 9 seconds. Patchy fog in the morning.
Tue night..NW winds 20 to 30 kt in the evening, becoming 15 to 20 kt with gusts to 25 kt. Combined seas 7 to 9 ft dominant period 10 seconds.
Wed..NW winds 10 to 15 kt. Wind waves 2 ft or less. NW swell 5 to 7 ft at 10 seconds.
Wed night..NW winds 10 to 15 kt in the evening, becoming 5 to 10 kt. Wind waves 2 ft or less. NW swell 5 to 7 ft at 10 seconds.
Thu..Winds variable 10 kt or less, becoming W 10 to 15 kt in the afternoon. Wind waves 2 ft or less. NW swell 4 to 6 ft at 10 seconds.
Thu night..NW winds 10 to 15 kt. Wind waves 2 ft or less. NW swell 4 to 5 ft at 10 seconds.
Fri..NW winds 10 to 15 kt. Wind waves 2 ft or less. Mixed swell nw 3 to 5 ft and S 3 ft.
Sat..NW winds 10 to 15 kt. Wind waves 2 ft or less. Mixed swell nw 3 to 4 ft and S 3 ft.
PZZ600 206 Pm Pdt Mon Apr 19 2021
Synopsis for the southern california coast and santa barbara channel including the channel islands national marine sanctuary and national park..At 20z, or 1 pm pdt, a 1033 mb high pressure center was located 700 nm west-northwest of point conception. A 1009 mb thermal low was located in az. Areas of dense fog will impact the northern and outer coastal waters tonight. Gales are expected across the outer coastal waters tonight through Tuesday evening.


7 Day Forecast for Marine Location Near Pismo Beach, CA
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location: 35.03, -120.79     debug


Area Discussion for - Los Angeles/Oxnard, CA
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FXUS66 KLOX 192045 AFDLOX

Area Forecast Discussion National Weather Service Los Angeles/Oxnard CA 145 PM PDT Mon Apr 19 2021

SYNOPSIS. 19/139 PM.

A cool down with a return of night through morning low clouds and fog will start tonight and continue through late in the week. Drizzle or light rain is possible Wednesday into Thursday morning, mainly for parts of Los Angeles and Ventura Counties.

SHORT TERM (TDY-THU). 19/143 PM.

An interesting day of trends today as weak onshore flow shifts to onshore. Interior areas, especially those above 2000' elevation, warmed up considerably, in some cases as much as 15 degrees from yesterday. On the other end of the spectrum, coastal areas generally cooled as much as 15 degrees as the turn to onshore ushered in that chilly air over the cold Pacific Ocean. The transition area between the coast and the foothills were very similar to yesterday.

Going forward, the rest of the week will be much cooler as a couple of low pressure systems drop out of the north and move through the state. Onshore flow will continue to increase and the marine layer will become much more widespread and include the coastal slopes by Wednesday and Thursday. Still dealing with some northerly gradients today across the western portion of the Santa Ynez Range and there could be some brief advisory level wind gusts there tonight. Will hold off issuing an advisory due to it being marginal and mostly in low impact areas but people driving through the Gaviota area will feel some decent gusts this evening. These winds will also hold off the low cloud push tonight across srn SB County and Ventura County but clouds should start to fill in early Tuesday and certainly by Tuesday evening. Likely many coastal areas will stay cloudy well into the afternoon but expect most valleys should clear out.

The first upper low Wednesday will mostly stay north and east of the area but significant cooling aloft will push the marine layer depth above 3000'. Drizzle was already in the forecast but upped the ante by adding in some 15-20 pops and light rain chances for parts of LA County in the morning. Minimal, if any, clearing for coast and coastal valleys with highs mostly in the low to mid 60s.

The second upper low Thursday is farther west and probably has the best chance of dropping measurable rain across LA County. Increased pops 5-10 percent for the morning and added some low pops in for the afternoon across the LA mountains and Antelope Valley as models show the airmass becoming slightly unstable. Once again slow if any clearing for coast and coastal valleys.

Increasing southwest winds expected in the Antelope Valley, especially the foothill areas this week, possibly reaching advisory levels at times.

LONG TERM (FRI-MON). 19/143 PM.

Strong onshore flow to continue Friday and into the weekend, though the upper lows will be replaced by a weak ridge Friday into early Saturday that will help warm temps a few degrees and reduce the marine layer depth and speed up clearing. Models continue to show a full latitude trough early next week, though differ quite a bit with rain chances. Basically all of the ECMWF ensembles show at least a little rain across most of the forecast area Sunday night into Monday while the GFS ensembles are drier. Interestingly both the GFS and EC deterministic runs were drier than earlier solutions, especially southern areas. It's likely the very early season typhoon in the western Pacific is causing some issues in the model runs that may continue for several more days so it may some time before we have more clarity in the rain situation for next week. For now, odds favor some rain in most areas by next Monday, but on the light side.

AVIATION. 19/1812Z.

At 1743Z, there was no marine layer depth at KLAX.

Moderate confidence in the current forecast. VFR conditions are occurring at all terminals. LIFR to IFR conditions will return to Central Coast terminals this evening and Los Angeles County coastal terminals after 06Z. Conditions will improve to MVFR south of Point Conception after 12z.

KLAX . VFR conditions will persist through at least 08Z, then there is a likely chance of LIFR to IFR conditions by 10Z at the latest. Any east winds should remain less than 7 knots.

KBUR . VFR conditions will persist through 13z. There is a medium (40 percent) chance of LIFR to IFR conditions after 13Z Tuesday.

MARINE. 19/143 PM.

Moderate to high confidence in the current forecast. Higher confidence in seas and timing, less confidence in wind speeds.

For the outer waters . Small Craft Advisory (SCA) level winds will very likely persist through today. Speeds will increase tonight through Tuesday evening with a GALE WARNING in place. Conditions should fall below SCA levels Thursday and Friday.

For the inner waters along the central coast . A Small Craft Advisory will be in place through Tuesday evening.

Inside the southern California bight, SCA level winds will likely linger during the afternoon and evening hours across the Santa Barbara Channel today and Tuesday. There is a moderate (30-40 percent) chance of SCA level for the waters between Pt. Mugu and San Mateo Point. Gusty winds could develop near Point Dume and through the San Pedro Channel this afternoon and evening.

LOX WATCHES/WARNINGS/ADVISORIES. CA . NONE. PZ . Small Craft Advisory in effect until 9 PM PDT Tuesday for zone 645. (See LAXMWWLOX). Small Craft Advisory in effect until 3 AM PDT Tuesday for zone 650. (See LAXMWWLOX). Small Craft Advisory in effect until 6 PM PDT this evening for zones 670-673-676. (See LAXMWWLOX). Gale Warning in effect from 6 PM this evening to 9 PM PDT Tuesday for zones 670-673-676. (See LAXMWWLOX).

.HAZARD POTENTIAL OUTLOOK (THU-MON).

No significant hazards expected.



PUBLIC . MW AVIATION . Sweet/Hall MARINE . Sweet SYNOPSIS . MW

weather.gov/losangeles


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
PSLC1 - 9412110 - Port San Luis, CA 10 mi62 min ENE 1 G 1.9 54°F 56°F1018.9 hPa
CPXC1 10 mi50 min 1 G 1.9
46011 - SANTA MARIA - 21 NM Northwest of Point Arguello, CA 13 mi44 min NW 21 G 27 53°F1019.1 hPa
46215 - Diablo Canyon, CA (076) 13 mi48 min 54°F5 ft
PTGC1 - Point Arguello, CA 32 mi74 min N 23 G 24 49°F 1018.4 hPa (+0.4)
HRVC1 39 mi62 min 50°F 1019.4 hPa
46218 - Harvest, CA (071) 40 mi48 min 53°F7 ft
46259 42 mi48 min 53°F8 ft

Wind History for Port San Luis, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
San Luis Obispo, San Luis Obispo County-Mc Chesney Field, CA17 mi18 minWNW 2010.00 miFair and Breezy64°F50°F60%1017.4 hPa
Santa Maria Public Airport/Capt G Allan Hancock Field, CA20 mi23 minWNW 166.00 miA Few Clouds with Haze60°F48°F65%1018.6 hPa
Lompoc, Vandenberg Air Force Base, CA23 mi76 minN 133.00 miFog/Mist54°F49°F84%1019.7 hPa

Link to 5 minute data for KSBP

Wind History from SBP (wind in knots)
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Last 24hrNW16NW16NW15NW15NW13NW13NW7W3S3CalmCalmCalmCalmCalmS3CalmCalmNE3NW3W5NW8NW13NW15NW20
1 day agoNW18NW18NW19NW18NW14NW12NW9NW6W5NW5W4SW3CalmCalmCalmW3CalmCalmCalm33NW4NW12NW15
2 days agoNW18
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Tide / Current Tables for Avila, California
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Avila
Click for Map
Mon -- 01:53 AM PDT     Moonset
Mon -- 02:20 AM PDT     1.95 feet High Tide
Mon -- 06:25 AM PDT     Sunrise
Mon -- 10:51 AM PDT     -2.42 feet Low Tide
Mon -- 11:41 AM PDT     Moonrise
Mon -- 07:00 PM PDT     0.62 feet High Tide
Mon -- 07:39 PM PDT     Sunset
Mon -- 09:15 PM PDT     0.54 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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1.41.71.91.91.61.10.3-0.5-1.3-1.9-2.3-2.4-2.2-1.8-1.2-0.6-0.10.30.60.60.60.50.60.7

Tide / Current Tables for Port San Luis Wharf, California
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Port San Luis Wharf
Click for Map
Mon -- 01:53 AM PDT     Moonset
Mon -- 02:26 AM PDT     4.09 feet High Tide
Mon -- 06:25 AM PDT     Sunrise
Mon -- 11:27 AM PDT     0.53 feet Low Tide
Mon -- 11:41 AM PDT     Moonrise
Mon -- 07:39 PM PDT     Sunset
Mon -- 08:09 PM PDT     3.24 feet High Tide
Mon -- 10:32 PM PDT     3.18 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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3.73.94.14.13.93.532.41.81.20.80.50.60.81.21.72.22.733.23.23.23.23.2

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NOTE: This section has been updated as of 1/26/2021. If the image you are expecting is not showing, please let me know. You may use the EDIT function to update your location.
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