Friday, April3, 2020
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Marine Weather and Tides
Seaside, 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 6:47AMSunset 7:32PM Friday April 3, 2020 1:44 AM PDT (08:44 UTC) Moonrise 1:34PMMoonset 3:15AM Illumination 78% 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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PZZ535 Monterey Bay- 831 Pm Pdt Thu Apr 2 2020
.small craft advisory in effect until 3 am pdt Friday...
Tonight..NW winds 15 to 25 kt with gusts up to 30 kt. Wind waves 5 to 6 ft. W swell around 3 ft at 10 seconds.
Fri..NW winds 15 to 25 kt with gusts up to 35 kt. Wind waves 4 to 5 ft. W swell around 3 ft at 11 seconds.
Fri night..NW winds 15 to 25 kt with gusts up to 35 kt. Wind waves 4 to 5 ft. W swell around 3 ft at 10 seconds.
Sat..SW winds 5 to 15 kt. Wind waves 1 to 2 ft. W swell around 3 ft at 10 seconds. A chance of rain.
Sat night..SW winds 10 to 15 kt. Wind waves around 2 ft. W swell 3 to 4 ft at 10 seconds. A chance of rain.
Sun..SW winds 15 to 25 kt with gusts up to 30 kt. Wind waves 4 to 5 ft. W swell 3 to 4 ft at 10 seconds. Showers.
Sun night..SW winds 5 to 15 kt. Wind waves 1 to 2 ft. W swell 4 to 5 ft at 9 seconds. Rain likely.
Mon..W winds up to 10 kt. Wind waves 1 to 2 ft. W swell 3 to 5 ft. Rain likely.
Tue..NW winds up to 10 kt. Wind waves 1 to 2 ft. W swell 4 to 6 ft and S around 2 ft. A chance of showers. Locally lower winds and seas across sheltered portions of the bay.
PZZ500 831 Pm Pdt Thu Apr 2 2020
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Strong northwest winds over the waters with occasional gale force gusts possible through tonight and into Friday. Fresh and steep wind generated waves can be produced, creating hazardous conditions for smaller vessels. Winds will start to subside late Friday and into the weekend. A moderate, predominately winds driven, northwesterly swell will prevail through much of the forecast period.


7 Day Forecast for Marine Location Near Seaside, CA
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location: 36.65, -121.81     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
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FXUS66 KMTR 030537 AFDMTR

Area Forecast Discussion National Weather Service San Francisco Bay Area 1037 PM PDT Thu Apr 2 2020

SYNOPSIS. Dry weather conditions with slightly below normal temperatures through tomorrow. A pair of storm systems arrive this weekend. The first system on Saturday will be mainly focused over the North Bay/Shoreline with breezy winds. The second stronger system arrives Sunday and will bring widespread rain, gusty southerly winds, isolated thunderstorms, cooler temperatures, and lingering showers through potentially much of next week.

DISCUSSION. as of 08:56 PM PDT Thursday . Another pleasant early April afternoon around the Bay Area. Despite the wall to wall sunshine temperatures came up a few short for where they should be this time of year. Highs this afternoon topped out mainly in the upper 50s and 60s with a handful lower 70s.

Skies will remain clear again tonight as a ridge of high pressure off the coast builds over the region. Compare to last night the winds will also be weaker, especially in the hills. However, enough mixing will remain which will keep overnight lows from really bottoming out. Additionally, dew points overnight are also forecast to be a tad higher. Current forecast for tonight has lows dropping into mid 30s to 40s. Similar to last night protected valley locations may locally drop to near freezing. Therefore, patchy frost will be possible again. No update is needed to the forecast.

Friday will be another nice day around the Bay Area with mostly sunny skies early with increasing clouds late in the day. The biggest impact weatherwise the next few days will be the unsettled weather returning this weekend.

For more details on the weekend see below.

PREV DISCUSSION. as of 03:00 PM PDT Thursday .

For the weekend, a pair of storm systems will arrive and bring unsettled weather throughout the weekend and into early next week. The first of these systems will be the weaker of the two, featuring a more tightly bound 542dm 500mb upper low skirting across extreme NW California. The frontal boundary ahead of the parent upper low will first bring rain (0.25-0.50") to the North Bay throughout the morning, before shifting focus to the SF Bay Area around midday Saturday (0.10-0.30"), and eventually weakening before shifting farther southward towards the Central Coast by the evening (0.05-0.20"). Moderate southerly winds will precede and accompany the surface cold front on the order of 10-20mph sustained with gusts 15-25mph.

Then, lingering isolated showers will persist overnight before the arrival of the next storm system early Sunday, a broader, more organized 530-535dm 500mb upper low. This second storm system is anticipated to bring approximately 2 to 3 times as much precipitation as the first storm system (0.50-1.00" regionwide for urban areas, 1.50-2.50" for coastal ranges), with gusty southerly winds (15-25mph sustained, gusts up 25-40mph), and a cooler, more unstable air mass arriving with it. The post frontal instability will allow for the deeper development of convection and with that, the possibility of hail and even thunderstorms. Snow levels will also drop down to as low as 3000-3500 ft in the post frontal environment into Sunday night, allowing for a dusting of snow amongst the highest peaks across the forecast region (and much more over the Sierra -- check out NWS Sacramento or NWS Reno for the Tahoe forecast). Latest model runs suggest the upper low will slow down as shifts southward into Southern California, extending the possibilities of linger/wrap around showers throughout much of next week.

AVIATION. as of 10:36 PM PDT Thursday . For 06Z TAFs. VFR across the Bay Area and the Central Coast. Skies are mostly clear with a slight chance for a few clouds between 1,500 and 2,0000 developing. Winds are onshore and currently are still breezy. The winds will ease slightly overnight before strengthening on Friday; though staying onshore. There is a chance for some stronger gusts in the afternoon ahead of the next weather system over the ocean moving towards the region (arriving Saturday). Sky conditions are forecast to remain VFR.

Vicinity of KSFO . Northwesterly winds remain breezy breezy, but will subside slightly overnight as skies remain clear. Upslope flow along the coast makes KHAF MVFR, so there is a slight chance for FEW to SCT cigs overnight but there is low confidence it moves over the terminal. VFR conditions are forecast for Friday. Winds will remain onshore and strengthen providing stronger gusts in the afternoon.

SFO Bridge Approach . Similar to KSFO.

Monterey Bay Terminals . Winds continue to taper off, but remain breezy. Possible FEW to SCT cigs show up briefly overnight around 1,500 to 2,000 feet, similar to last night, but there is low confidence as skies are forecast to be mostly clear. VFR on Friday as winds strengthen in the afternoon with stronger gusts possible.

MARINE. as of 8:31 PM PDT Thursday . Strong northwest winds over the waters with occasional gale force gusts possible through tonight and into Friday. Fresh and steep wind generated waves can be produced, creating hazardous conditions for smaller vessels. Winds will start to subside late Friday and into the weekend. A moderate, predominately winds driven, northwesterly swell will prevail through much of the forecast period.

MTR WATCHES/WARNINGS/ADVISORIES. Tngt. SCA . Pt Arena to Pt Reyes 0-10 nm SCA . Pt Reyes to Pigeon Pt 0-10 nm SCA . Pigeon Pt to Pt Pinos 0-10 nm SCA . Pt Arena to Pigeon Pt 10-60 nm SCA . Pigeon Pt to Pt Piedras Blancas 10-60 nm SCA . Pt Pinos to Pt Piedras Blancas 0-10 nm SCA . Mry Bay until 3 AM



PUBLIC FORECAST: MM/DRP AVIATION: DK MARINE: DK

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Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
46240 - Cabrillo Point, Monterey Bay, CA (158) 5 mi44 min 58°F4 ft
MEYC1 5 mi68 min WNW 8 G 9.9 51°F 60°F1020.3 hPa
MLSC1 - Moss Landing, South Harbor, CA 11 mi50 min ESE 1.9 G 6 45°F 1019.9 hPa40°F
ELXC1 - Elkhorn Slough Reserve, CA 12 mi119 min SE 6 47°F 1034 hPa43°F
46239 - Point Sur, CA (157) 26 mi44 min 55°F10 ft
46114 - West Monterey Bay, CA 29 mi134 min 56°F9 ft
46042 - MONTEREY - 27NM West of Monterey Bay, CA 33 mi44 min NW 21 G 27 52°F 56°F1020.2 hPa46°F

Wind History for Monterey, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Monterey Regional Airport, CA4 mi50 minWSW 510.00 miOvercast52°F44°F75%1021.5 hPa
Salinas, Salinas Municipal Airport, CA11 mi51 minWSW 810.00 miFair49°F41°F74%1020.7 hPa
Watsonville, Watsonville Municipal Airport, CA20 mi51 minN 410.00 miFair45°F37°F77%1019.7 hPa

Link to 5 minute data for KMRY

Wind History from MRY (wind in knots)
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Last 24hrS5SE4CalmSE3E6E4CalmE4N5NW5NW10NW8NW10--NW12----W9SW5W6W6NW8W6W5
1 day agoW7W555W7NW64NW6NW10NW12NW12
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2 days agoSE3SE3SE3SE4E5E6E3CalmNW3NW7N5NW6NW8NW9NW8--NW6W6W7W5CalmW6W6SW5

Tide / Current Tables for Monterey, Monterey Harbor, California (2)
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Monterey
Click for Map
Fri -- 12:56 AM PDT     3.08 feet Low Tide
Fri -- 04:15 AM PDT     Moonset
Fri -- 06:35 AM PDT     5.12 feet High Tide
Fri -- 06:49 AM PDT     Sunrise
Fri -- 02:02 PM PDT     -0.43 feet Low Tide
Fri -- 02:34 PM PDT     Moonrise
Fri -- 07:32 PM PDT     Sunset
Fri -- 09:01 PM PDT     4.36 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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3.23.13.23.64.24.75.15.14.73.92.91.70.6-0.2-0.4-0.20.51.52.63.54.14.44.23.7

Tide / Current Tables for Point Pinos, California Current
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Point Pinos
Click for Map
Fri -- 03:28 AM PDT     0.00 knots Slack
Fri -- 04:15 AM PDT     Moonset
Fri -- 06:08 AM PDT     0.41 knots Max Flood
Fri -- 06:49 AM PDT     Sunrise
Fri -- 08:51 AM PDT     -0.00 knots Slack
Fri -- 12:08 PM PDT     -0.83 knots Max Ebb
Fri -- 02:34 PM PDT     Moonrise
Fri -- 04:06 PM PDT     0.00 knots Slack
Fri -- 07:14 PM PDT     0.71 knots Max Flood
Fri -- 07:32 PM PDT     Sunset
Fri -- 10:30 PM PDT     -0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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-0.4-0.3-0.2-0.10.10.30.40.40.2-0-0.4-0.7-0.8-0.8-0.6-0.4-00.30.60.70.70.50.2-0.2

Weather Map
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wmap_P
GEOS Local Image of CentralWestCoast    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 San Francisco/Monterey Bay Area, CA (4,6,7,8)
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Ground Weather Radar Station San Francisco Bay Area, 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.