Tuesday, December10, 2019
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Marine Weather and Tides
Pismo Beach, CA

Version 3.4
NOTICE
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.
6/2/2019. Many thanks to a user for reporting an error on one of the Edit pages. The switch to PHP 7.2 caused many pages that previously worked to quit working. I fixed many but I still depend on users to report ones I missed. Please report errors HERE or send an email to me at L-36.com. Allen

Sunrise 6:58AMSunset 4:52PM Tuesday December 10, 2019 1:57 AM PST (09:57 UTC) Moonrise 4:03PMMoonset 5:21AM Illumination 98% Phase: Waxing Gibbous; Moon at 13 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- 902 Pm Pst Mon Dec 9 2019
Tonight..NW winds 10 to 15 kt in the evening, becoming N 5 to 10 kt. Wind waves 2 ft late in the evening, becoming 2 ft or less. W swell 5 to 6 ft at 15 seconds. Patchy fog after midnight.
Tue..NE winds 5 to 10 kt, becoming nw 10 to 15 kt in the afternoon. Wind waves 2 ft or less. NW swell 4 to 5 ft at 14 seconds. Patchy fog in the morning.
Tue night..NW winds 10 to 15 kt in the evening, becoming variable 10 kt or less. Wind waves 2 ft or less. W swell 4 to 6 ft at 14 seconds.
Wed..Winds variable 10 kt or less, becoming nw 10 to 15 kt in the afternoon. Wind waves 2 ft or less. NW swell 6 to 7 ft at 15 seconds.
Wed night..NW winds 10 to 15 kt in the evening, becoming N 5 to 10 kt. Wind waves 2 ft or less. NW swell 6 to 7 ft at 14 seconds.
Thu..N winds 5 to 10 kt, becoming nw 10 to 20 kt in the afternoon. Wind waves 1 to 3 ft. NW swell 6 to 8 ft at 17 seconds.
Thu night..N winds 10 to 15 kt. Wind waves 1 to 3 ft. NW swell 9 to 11 ft at 17 seconds.
Fri..NW winds 10 to 15 kt. Wind waves 2 ft or less. NW swell 11 to 13 ft.
Sat..NW winds 15 to 20 kt with gusts to 25 kt. Combined seas 10 to 12 ft. Slight chance of showers.
PZZ600 902 Pm Pst Mon Dec 9 2019
Synopsis for the southern california coast and santa barbara channel including the channel islands national marine sanctuary and national park..At 04z or 8 pm pst, a 1025 mb surface high was centered 450 nm sw of point conception with a ridge extending to a 1028 mb high across ern nevada.


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 100658 AFDLOX

Area Forecast Discussion . UPDATED National Weather Service Los Angeles/Oxnard CA 1058 PM PST Mon Dec 9 2019

SYNOPSIS. 09/825 PM.

Skies will be partly cloudy through the week. Afternoon high temperatures will be near normal through Wednesday and then above normal on Thursday and Friday. By the weekend, clouds should increase again and there is a slight chance of rain in the Ventura County mountains.

SHORT TERM (MON-THU). 09/824 PM.

***UPDATE***

Latest GOES-W fog product imagery indicated mostly clear skies across much of the forecast area, except low clouds were lingering across interior SLO County including the Salinas River Valley. There will be enough north and easterly flow to keep low clouds banked up against the foothills in eastern SLO County and possibly the Ventura County Mtns through tonight. Latest NAM- WRF Cross Section model was hinting at patchy low clouds developing around the Long Beach area, but based on current conditions with clear skies, and some northerly winds across the region, will pull back the low clouds for Long Beach and southern L.A. County coastal areas for the overnight hours. There will be some local gusty northerly winds across the I-5 Corridor and should filter down to the Santa Clarita Valley overnight. There could be local gusty Northerly winds across the western portion of the SBA South Coast, mainly near Gaviota. Winds will not reach advisory levels overnight.

High temperatures over the last 24-hours trended up anywhere from 3-12 degrees across a good part of the forecast area, except 3-5 degrees cooler across SLO interior locations where it stayed cloudy all day. Best warming occurred across valleys and the Central Coast thanks to some weak offshore flow off the San Lucia Mtns. The warming was due to an elongated short wave ridge behind the exiting trough into southern Arizona today that set up over Southern Cal well into the west Coast of Canada. This ridge will breakdown by Tuesday morning allowing for a more zonal flow over Southern Cal. Skies will become mostly cloudy with high clouds moving into the region late tonight and will persist into Wednesday as a shortwave trough within the upper flow moves through the area Tuesday afternoon into Wednesday morning. Not expecting any rain with this quick moving disturbance. High temps will be 2-6 degrees cooler in most areas tomorrow, except a few degrees warmer across interior locations of SLO County. Overall, highs will be around normal for this time of year.

***From Previous Discussion***

The main impact of the trough will be mostly cloudy skies and cooler conditions for Wednesday along with some breezy to locally windy conditions through the Interstate 5 Corridor and across southern Santa Barbara County.

The trough should exit the region on Wednesday night and high pressure aloft should build in through Thursday. Offshore flow will develop and temperatures should warm to above normal on Thursday. Advisory level northeast winds do not look likely for Thursday, but breezy to locally windy conditions could develop through and below passes and canyons.

LONG TERM (FRI-MON). 09/155 PM.

Warmer than normal conditions should remain into Friday, then a weak trough of low pressure will sag south for the weekend. PoPs and rain chances were tweaked a bit, but the best chance for any rainfall will be for the northern areas, including San Luis Obispo County and the northern slopes of the mountains. Advisory level winds should develop between Saturday and Sunday through the Interstate 5 Corridor and across southern Santa Barbara County.

A moderate Santa Ana could be setting up for early next week in the wake of the storm. ECMWF ensembles indicate several members with strong winds across eastern Ventura and western Los Angeles Counties. More confidence is placed more for the mountains and the Santa Clarita Valley at this time, but the coastal and valley area will have to be watched more closely. The latest GFS surface pressure gradients suggest -5.1 mb pressure gradient between KLAX and KDAG. Regardless, warmer conditions should expected for Monday and Tuesday of next week.

AVIATION. 10/0554Z.

At 2302Z at KLAX, there was no marine layer. There was a weak sfc based inversion with a top near 700 ft and a temp of 17 C.

S of Point Conception . High confidence in TAFs except lower at KLGB and KLAX where there is a 20 percent chc of LIFR cigs/vis 12z- 16z.

N of Point Conception . Moderate confidence with 00z TAFs. There will be some LLWS +/- 10kt possible at KSBP KSMX with NE winds aloft and NW-N winds at surface through 14Z. There is a 30 percent of LIFR Conds 10Z-16Z. Low confidence on KPRB, with a 40% chance for LIFR/IFR cigs lasting until 19Z.

KLAX . High confidence in TAF except lower confidence 10Z-16Z with a 20 percent chc LIFR cig/vis. Good confidence that there will be an east wind component less than 8 kt 10Z-18Z.

KBUR . High confidence in TAF.

MARINE. 09/908 PM.

Moderate confidence Small Craft Advisory (SCA) conditions from Point Conception to San Nicolas Island through tonight. Winds will stay under SCA Tuesday through Wednesday morning, with SCA conditions possible for the same area Wednesday afternoon into Thursday. More widespread gusty NW to W winds possible Friday and Saturday with building seas.

A large and long period W to NW swell will impact the coastal waters later Thursday and continue through Saturday, resulting in hazardous sea conditions and large breaking waves near shore. Breaking waves at the Morro Bay and Ventura Harbor entrances are possible.

There is a 30% chance for Patchy dense fog with low visibility possible through at least Tuesday off the L.A. Coast.

LOX WATCHES/WARNINGS/ADVISORIES. CA . NONE. PZ . Small Craft Advisory in effect until 3 AM PST Tuesday for zones 673-676. (See LAXMWWLOX).

.HAZARD POTENTIAL OUTLOOK (THU-MON).

High surf is likely and minor coastal flooding is possible for late this week at area beaches. Strong north winds possible Sunday in southern Santa Barbara County, and parts of LA/Ventura Counties.



PUBLIC . Kaplan/Hall AVIATION . Rorke MARINE . Kittell/CK SYNOPSIS . Phillips

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 mi57 min E 1 G 2.9 57°F 60°F1022 hPa (+0.0)
CPXC1 10 mi27 min ENE 5.1 G 7 56°F 1022.2 hPa44°F
46011 - SANTA MARIA - 21 NM Northwest of Point Arguello, CA 13 mi27 min N 16 G 19 58°F 60°F1022 hPa49°F
46215 - Diablo Canyon, CA (076) 13 mi57 min 59°F4 ft
PTGC1 - Point Arguello, CA 32 mi57 min NNE 12 G 13 56°F 1020.7 hPa (+0.6)
HRVC1 39 mi69 min 60°F 1021 hPa
46218 - Harvest, CA (071) 40 mi27 min 60°F7 ft
46259 42 mi27 min 59°F5 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 mi61 minSSE 410.00 miFair44°F41°F89%1021.5 hPa
Santa Maria Public Airport/Capt G Allan Hancock Field, CA20 mi66 minSE 510.00 miFair46°F41°F83%1021.8 hPa
Lompoc, Vandenberg Air Force Base, CA23 mi2 hrsENE 89.00 miFair49°F42°F78%1021.6 hPa

Link to 5 minute data for KSBP

Wind History from SBP (wind in knots)
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Last 24hrSE5E4CalmCalmCalmCalmNW3NW9W4W5W6N6N8N6N4N94NE4S34E3CalmCalmSE4
1 day agoS9S6SW6NW7CalmCalmSE3SE3CalmSW5W7NW6N4CalmS3CalmCalmCalmCalmNW5CalmNW10NW3W6
2 days agoSE6SE7SE7SE8SE7SE4SE6SE6SE5S5CalmS6S7S5S4S3CalmS5S3S7S9S9SE7S8

Tide / Current Tables for Avila, California
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Avila
Click for Map
Tue -- 01:25 AM PST     -0.71 feet Low Tide
Tue -- 05:21 AM PST     Moonset
Tue -- 07:00 AM PST     Sunrise
Tue -- 07:47 AM PST     2.99 feet High Tide
Tue -- 03:07 PM PST     -3.14 feet Low Tide
Tue -- 04:02 PM PST     Moonrise
Tue -- 04:50 PM PST     Sunset
Tue -- 09:31 PM PST     0.74 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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-0.4-0.7-0.7-0.30.41.42.22.832.61.80.6-0.8-2-2.8-3.1-2.9-2.3-1.3-0.40.30.70.70.4

Tide / Current Tables for Port San Luis Wharf, California
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Port San Luis Wharf
Click for Map
Tue -- 01:55 AM PST     1.74 feet Low Tide
Tue -- 05:21 AM PST     Moonset
Tue -- 07:00 AM PST     Sunrise
Tue -- 08:12 AM PST     5.94 feet High Tide
Tue -- 03:19 PM PST     -0.34 feet Low Tide
Tue -- 04:02 PM PST     Moonrise
Tue -- 04:51 PM PST     Sunset
Tue -- 09:33 PM PST     3.81 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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2.41.91.722.73.74.75.55.95.853.92.51.20.2-0.3-0.20.41.42.43.33.73.83.4

Weather Map
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wmap_P
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.
Link to Loop

Other links: Northern Pacific     Contential US     Full GOES-East
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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