Saturday, October23, 2021
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Marine Weather and Tides
Atwater, CA

Version 3.4
NOTICE
3/30/2021 -- ANZ330 has been split into ANZ331 and ANZ332. Click EDIT in Marine Forecast and select your new zone.
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 7:17AMSunset 6:16PM Saturday October 23, 2021 1:28 PM PDT (20:28 UTC) Moonrise 7:09PMMoonset 9:12AM Illumination 91% Phase: Waning Gibbous; Moon at 18 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- 847 Am Pdt Sat Oct 23 2021
.small craft advisory in effect from late tonight through Sunday morning...
.gale warning in effect from Sunday morning through Sunday evening...
Today..N winds around 5 kt, becoming sw this afternoon. Wind waves 1 ft. W swell 8 to 10 ft at 14 seconds. Patchy fog this morning. A slight chance of rain this afternoon.
Tonight..SE winds 10 to 15 kt with gusts up to 25 kt. Wind waves 2 to 3 ft. W swell 5 to 7 ft at 13 seconds. Rain.
Sun..S winds 20 to 30 kt with gusts up to 40 kt. Wind waves 6 to 7 ft. W swell 5 to 7 ft at 13 seconds. Rain.
Sun night..SW winds 15 to 25 kt with gusts up to 40 kt. Wind waves 7 to 8 ft. W swell 7 to 9 ft at 16 seconds. Rain.
Mon..W winds 10 to 15 kt. Wind waves 1 to 2 ft. W swell 13 to 15 ft at 18 seconds. Rain.
Mon night..SW winds around 5 kt. Wind waves 1 ft. W swell 11 to 13 ft at 17 seconds.
Tue..SE winds around 5 kt. Wind waves 1 ft. W swell 9 to 11 ft. A chance of rain.
Wed..N winds 5 to 10 kt. Wind waves 1 ft. W swell 6 to 8 ft. Locally lower winds and seas across sheltered portions of the bay.
PZZ500 847 Am Pdt Sat Oct 23 2021
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Southerly winds will increase to gales as a strong low pressure system nears the pacific northwest sweeping a cool frontal system across our coastal waters later Sunday into Monday morning. An atmospheric river will accompany this frontal system bringing heavy rain later in the weekend. Expect strong and gusty southerly winds, steepening waves and large swell Sunday into Monday. Chilly and showery weather continuing Tuesday. Drier mid to late next week.


7 Day Forecast for Marine Location Near Atwater, CA
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location: 37.35, -120.61     debug


Area Discussion for - San Joaquin Valley/Hanford, CA
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FXUS66 KHNX 231033 AFDHNX

Area Forecast Discussion National Weather Service Hanford CA 333 AM PDT Sat Oct 23 2021

SYNOPSIS. Light showers continue to spread across the district mainly north of Fresno County. Skies will remain cloudy today with a few showers around. A strong storm system will bring breezy conditions to the wind-prone areas of the district Sunday night and Monday morning ahead of a cold front. The cold front will bring moderate to isolated heavy precipitation over the district starting Sunday night, lasting through Monday afternoon. Residual upsloping showers Tuesday in the Sierra Nevada are possible before a drier pattern emerges Wednesday and afterwards.

DISCUSSION. Cold front is just making its way southeast through the region. Residual showers . mainly north of Fresno county attm are associated with a vort max moving across NORCAL. Showers will become confined to the southend of the SJV and along the Sierra foothills as upslope moisture will continue as a strong onshore flow continues today with below normal temperatures. Snow levels are around 8500 feet with only light amounts of snow possible today.

We will see more clearing overnight tonight and early sunday in advance of the final and very robust cold front that is currently forecast to move across the region Sunday night and Monday. The latest ensemble guidance is a bit wetter with the system than the previous forecast package. We will see heavy rain below 8000 feet, gusty winds along the west side of the SJV and heavy snow above 8000 feet. We are still working out the specifics, but will see very heavy precip just ahead and along the front as it sweeps through. The ensemble guidance is still focusing on the timing and intensity of the band of precipitation associated with the front. But is looking like early Monday morning we will be taking on the brunt of the storm across the Fresno metro area. We are concerned that we may see mud and debris flows associated with wildfires across the Sierra. We are also concerned about street flooding in the SJV in poor drainage areas. Many cities have taken extra precautions to clear storm drains to help prevent street closures due to heavy rain that is expected with the storm. However, the roads between SJV fields have historically flooded due to poor drainage.

As far as snow goes . it will be measured in feet. 2 to 3 feet is expected above 8000 feet and some isolated areas could see up to 4 feet with this event. We could see some breezy conditions along the west side of the SJV with some isolated gusts up to 35 along the Interstate 5 corridor.

Once the system moves through the region on Tuesday evening, high pressure ridge will build north from the southern EPAC and gradually warm us up . but still will remain below normal with dry conditions.

AVIATION. Increasing areas of MVFR in low clouds and precipitation with local mountain obscuring IFR over the Sierra Nevada north of Kings Canyon, extending south over the Tehachapi mountains through 20z Saturday. Otherwise, VFR conditions will prevail across the central CA interior for the next 24 hours.

AIR QUALITY ISSUES. None.

CERTAINTY.

The level of certainty for days 1 and 2 is medium. The level of certainty for days 3 through 7 is medium.

Certainty levels include low . medium . and high. Please visit www.weather.gov/hnx/certainty.html for additional information an/or to provide feedback.

HNX WATCHES/WARNINGS/ADVISORIES. Flash Flood Watch from Sunday morning through Monday evening for CAZ318-320-322-325>327-329>331.

Winter Storm Watch from Sunday morning through Monday evening for CAZ323-326>331.



public . JDB aviation . MV

weather.gov/hanford


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
ELXC1 - Elkhorn Slough Reserve, CA 70 mi104 min WNW 1.9 60°F 1017 hPa55°F
MLSC1 - Moss Landing, South Harbor, CA 73 mi55 min 59°F

Wind History for Monterey, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Merced Regional Airport, CA6 mi36 minNW 510.00 miMostly Cloudy67°F47°F49%1014.3 hPa

Link to 5 minute data for KMER

Wind History from MER (wind in knots)
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Last 24hr00--------------------------NW5NW7N4NW7N7N5N3N5N5
1 day ago0--000----0----0----NW3N4W6W5W6W6W6S30E5E3
2 days agoW6W5--SE9S11--S8E4SE3--0--0----00E3000W5E30

Tide / Current Tables for Grant Line Canal (drawbridge), Old River, California
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Grant Line Canal (drawbridge)
Click for Map
Sat -- 05:08 AM PDT     0.03 feet Low Tide
Sat -- 07:22 AM PDT     Sunrise
Sat -- 10:16 AM PDT     Moonset
Sat -- 11:17 AM PDT     2.80 feet High Tide
Sat -- 04:20 PM PDT     1.16 feet Low Tide
Sat -- 06:17 PM PDT     Sunset
Sat -- 08:10 PM PDT     Moonrise
Sat -- 09:49 PM PDT     3.70 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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Tide / Current Tables for Brandt Bridge, San Joaquin River, California Current
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Brandt Bridge
Click for Map
Sat -- 01:41 AM PDT     -1.06 knots Max Ebb
Sat -- 05:59 AM PDT     0.00 knots Slack
Sat -- 07:22 AM PDT     Sunrise
Sat -- 08:43 AM PDT     0.49 knots Max Flood
Sat -- 10:16 AM PDT     Moonset
Sat -- 11:22 AM PDT     -0.00 knots Slack
Sat -- 02:15 PM PDT     -0.50 knots Max Ebb
Sat -- 05:02 PM PDT     0.00 knots Slack
Sat -- 06:16 PM PDT     Sunset
Sat -- 07:37 PM PDT     0.65 knots Max Flood
Sat -- 08:10 PM PDT     Moonrise
Sat -- 10:05 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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Weather Map
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GEOS Local Image of CentralWestCoast    EDIT
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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