Thursday, March4, 2021
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Marine Weather and Tides
Sacramento, 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 6:31AMSunset 6:03PM Thursday March 4, 2021 4:57 PM PST (00:57 UTC) Moonrise 12:00AMMoonset 9:55AM Illumination 62% Phase: Waning Gibbous; Moon at 21 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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PZZ530 San Pablo Bay, Suisun Bay, The West Delta And The San Francisco Bay North Of The Bay Bridge- 228 Pm Pst Thu Mar 4 2021
Tonight..SW winds up to 10 kt.
Fri..SW winds 5 to 15 kt.
Fri night..SW winds 5 to 15 kt. Showers.
Sat..W winds 5 to 15 kt. A slight chance of showers.
Sat night..W winds 5 to 15 kt.
Sun..SW winds 5 to 15 kt.
Sun night..W winds around 5 kt.
Mon..SW winds 5 to 10 kt. Rain likely.
Tue..S winds 5 to 15 kt. Rain.
PZZ500 228 Pm Pst Thu Mar 4 2021
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Southerly winds have developed ahead of a cold front and will increase overnight. Winds will be strongest north of point reyes. A long period northwest swell will impact the coastal waters through Friday. The passing cold front will bring rain later Friday into Saturday morning. Another low pressure system from the northwest will bring more rain early to mid next week.


7 Day Forecast for Marine Location Near Sacramento, CA
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location: 38.58, -121.51     debug


Area Discussion for - Sacramento, CA
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FXUS66 KSTO 042246 AFDSTO

Area Forecast Discussion National Weather Service Sacramento CA 246 PM PST Thu Mar 4 2021

SYNOPSIS. Dry and mild weather through tomorrow. Rain and mountain snow chances return over the weekend and early next week with possible mountain travel delays.

DISCUSSION. We are seeing quiet conditions this afternoon as we sit under a short wave ridge. This ridge will push to the east tomorrow and amplify over the northern Rockies as a trough digs out of the Gulf of Alaska and approaches the west coast. This will bring increased onshore flow starting during the afternoon tomorrow and the breezy southerly winds will continue into Friday night. Wind gusts up to 35 mph will be possible over the Sacramento Valley and over the Sierra with locally stronger gusts as you approach the central Sierra.

The bigger impact will be the precip that the trough brings. Showers will begin to move into the Coastal Range around 4pm/0z and will continue to overspread the region during the evening. Widespread rain and snow is expected overnight Friday into early Saturday morning as the trough axis and associated cold front push through the area. We do see some very weak CAPE build in over the area in the lowest levels late Friday night into Saturday morning. There will not be enough CAPE for any thunderstorms and that is a zero concern at this time but should be enough CAPE to bring some enhanced snowfall over the Sierra. Snow rates could be greater than 2"/hr. for a short time between 4am/12z and 7am/15z. We will also see snow levels fall quickly after 1am/9z to 4am/12z as they go from 5000-6000 feet down to 3000 to 4000 feet. Snow totals are looking to be 3-8" above 5000 feet with a dusting to 4" between 3500 and 5000 feet. These snow totals are marginal for a Winter Weather Advisory but given the high snow rates for a time and that it is a Friday night into a Saturday morning went ahead and issued a WSW from 10pm/6z to 10am/18z Saturday. Rain totals are looking to be between a 0.10-0.75" in the Valley with the lowest totals over the San Joaquin and 0.25-1.0" in the Foothills.

Trough will weaken, as it moves east into Nevada Saturday with precipitation diminishing during the afternoon. Broad southwest flow over the area with dry weather Sunday before a series of systems impact the area next week. Valley temperatures will be a bit cooler with highs from the upper 50's to low 60's.

-CJM

EXTENDED DISCUSSION (Monday THROUGH Thursday). Potentially active early-middle part of next week as forecast guidance continues to advertise periods of rain and mountain snow for Northern California. Ensembles have an upper level low dropping southeastward from the Gulf of Alaska toward the California coast from Monday to Wednesday. During this time, multiple shortwaves will ripple through the cyclonic flow, the first occurring around late Monday, and another around Wednesday. European ENS mean 1000-500 mb thickness drops to around 530 decameters, which could conceivably drop snow levels to 3000 ft (or less). Main impacts will be the potential for travel delays in the mountains, as well as slick roadways. In terms of snow amounts, the National Blend of Models presently gives Blue Canyon about a 50 percent shot at getting a foot or more of snow from late Monday through Wednesday. Will continue to keep a close eye on this system. // Rowe

AVIATION. General VFR expected over the next 24 hrs. Surface wind gusts generally under 12 kts. Hi-res models suggest the possibility of the marine layer surging in again; however, confidence is low in a stratus deck forming. If it does, it should stay within the Delta region. Tomorrow, winds will be breezier and mostly from the south with gusts between 20-30kt for the Sacramento Valley. The San Joaquin Valley winds will have a more north and westerly component and be lighter.

STO WATCHES/WARNINGS/ADVISORIES. Winter Weather Advisory from 10 PM Friday to 10 AM PST Saturday for West Slope Northern Sierra Nevada-Western Plumas County/Lassen Park.




Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
SFXC1 - San Francisco Bay Reserve, CA 38 mi73 min WNW 7 64°F 1024 hPa41°F
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 42 mi58 min NW 6 G 8.9 61°F 1023.2 hPa (-0.6)
PCOC1 - 9415144 - Port Chicago, CA 46 mi58 min W 9.9 G 12 58°F 56°F1023.2 hPa (-0.5)
RCMC1 - 9414863 - Richmond, CA 66 mi58 min SW 6 G 8.9 55°F 55°F1024.2 hPa (+0.0)

Wind History for Port Chicago, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Sacramento Executive Airport, CA4 mi65 minSSW 510.00 miFair64°F40°F41%1023.2 hPa
Sacramento, McClellan Airfield Airport, CA8 mi63 minVar 410.00 miFair66°F41°F40%1023 hPa
Sacramento International Airport, CA10 mi65 minS 910.00 miFair64°F39°F40%1023.2 hPa
Sacramento Mather Airport, CA11 mi63 minS 610.00 miClear66°F39°F37%1023 hPa
University Airport, CA15 mi63 minSSW 810.00 miFair64°F39°F40%1023.4 hPa
Lincoln Regional Karl Harder Field, CA24 mi63 minSSW 510.00 miFair64°F37°F37%1023 hPa

Link to 5 minute data for KSAC

Wind History from SAC (wind in knots)
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1 day agoNW3CalmCalmCalmW4CalmCalmCalmCalmCalmCalmCalmNW4NW3NW6N7SW33354S5S6S6
2 days agoCalmNW3NW3NW3CalmCalmW4W3NW3NW6N4N7NW5NW4N5N6NW53NW5NW6Calm3W6Calm

Tide / Current Tables for Sacramento #4, Sacramento River, California
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Sacramento #4
Click for Map
Thu -- 05:41 AM PST     0.40 feet Low Tide
Thu -- 06:33 AM PST     Sunrise
Thu -- 09:55 AM PST     Moonset
Thu -- 10:18 AM PST     3.08 feet High Tide
Thu -- 06:02 PM PST     Sunset
Thu -- 07:11 PM PST     0.18 feet Low Tide
Thu -- 11:58 PM PST     2.20 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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2.21.91.510.70.40.40.81.72.63.132.82.41.91.40.90.50.30.20.30.91.52

Tide / Current Tables for Clarksburg #4, Sacramento River, California
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Clarksburg #4
Click for Map
Thu -- 04:11 AM PST     0.40 feet Low Tide
Thu -- 06:33 AM PST     Sunrise
Thu -- 09:09 AM PST     3.08 feet High Tide
Thu -- 09:55 AM PST     Moonset
Thu -- 05:41 PM PST     0.18 feet Low Tide
Thu -- 06:02 PM PST     Sunset
Thu -- 10:49 PM PST     2.20 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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1.81.30.90.50.40.51.122.83.132.72.31.81.20.70.40.20.20.51.11.72.12.2

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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