Sunday, September27, 2020
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Marine Weather and Tides
East Oakdale, CA

Version 3.4
NOTICE
8/26/2020 The 7 day forecast is taking about 5 seconds to load but it will eventually load. NOAA is still working on it.
8/18/2020 NOAA continues to have trouble. Wind guest will occasionally be left off graphs. I am working with NOAA to resolve the issue.
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 6:54AMSunset 6:53PM Sunday September 27, 2020 9:36 AM PDT (16:36 UTC) Moonrise 4:18PMMoonset 1:43AM Illumination 79% 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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PZZ531 San Francisco Bay South Of The Bay Bridge- 847 Am Pdt Sun Sep 27 2020
Today..SW winds up to 10 kt, becoming nw this afternoon.
Tonight..NW winds up to 10 kt.
Mon..W winds around 5 kt.
Mon night..N winds up to 10 kt.
Tue..NW winds up to 10 kt.
Tue night..NW winds up to 10 kt.
Wed..W winds 5 to 15 kt.
Thu..W winds 5 to 15 kt.
PZZ500 847 Am Pdt Sun Sep 27 2020
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Surface high pressure over the great basin will result in offshore winds and push a surface thermal trough from the california interior to the coast tonight and Monday. Northwest winds will decrease and and a southerly wind reversal will develop Monday into Tuesday. A northwest swell will gradually subside while a light southerly swell continues.


7 Day Forecast for Marine Location Near East Oakdale, CA
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location: 37.82, -120.83     debug


Area Discussion for - Sacramento, CA
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FXUS66 KSTO 270745 AFDSTO

Area Forecast Discussion National Weather Service Sacramento CA 1245 AM PDT Sun Sep 27 2020

SYNOPSIS. Dry, windy, and hot conditions will lead lead to critical fire weather conditions through Monday. Above normal temperatures and dry conditions will linger through the second half of the week.

DISCUSSION. A prolonged critical fire weather is unfolding overnight across northern California. Northerly winds are already at 10 to 20 mph with some gusts above 30 mph in portions of the Sacramento Valley, combined with extremely poor relative humidity values for nocturnal standards. Winds will continue to increase through sunrise with relative humidity values holding steady (or even dropping). GOES-West satellite is providing high-resolution imagery with a 1-minute temporal refresh rate over much of the Golden State through at least 11 AM PDT Sunday to aid in fire weather support and services.

California is presently positioned between an upper level ridge axis oriented north-south a few hundred miles offshore, as well as a trough that extends from the Northern Rockies southwest towards the Great Basin. This results in northwest flow aloft, a pattern setup that is generally concerning this time of year as we begin to enter offshore wind season. The north-south and east-west surface pressure gradients are continuing to strengthen as a surface high builds in Oregon and Nevada. As of 12 AM PDT, the gradients were +13.2 mb from Medford to Sacramento and +7.0 mb from Winnemucca, Nevada to San Francisco. The stronger the pressure gradients, the better potential for stronger winds.

For the Sacramento Valley . the strongest winds are forecast to impact the western half of the valley from now through mid- morning, then marginally ease during the day on Sunday. That said, winds will remain strong and gusty with relative humidity values bottoming-out during the afternoon hours continued critical fire weather conditions. A renewed period of strong winds will redevelop overnight Sunday and continue into Monday. Peak winds during this event for the Sacramento Valley will be north to northeast at 20 to 30 mph sustained with gusts to 45 mph, locally 50 mph. Minimum relative humidity values will fall to the low teens and possibly single digits on Sunday and Monday afternoons.

For the Southern Cascades, Northern Sierra, and foothills . strongest winds will impact the southwest-northeast oriented canyons/gaps (e.g., Jarbo Gap) through mid-morning before gradually easing during the day on Sunday. A renewed burst of possibly stronger winds will develop overnight Sunday and into Monday. Peak winds will be northeast to east at 20 to 30 mph with gusts to 45 mph, locally 55+ mph. Relative humidity values will fall to the 10-20 percent range on Sunday and Monday afternoons with exceptionally poor overnight recoveries.

The Red Flag Warning is in effect through 9 pm PDT Monday during this prolonged period of extreme fire weather conditions. Additionally, a wind advisory is in effect for locations expected to be impacted by the strongest winds: 2 am PDT Sunday to 8 pm PDT Sunday for the western Sacramento Valley, and 2 am PDT Sunday to 2 pm PDT Monday for the northern Sierra Nevada foothills.

Shifting from fire weather to heat . the upper level ridge offshore will move onshore over Oregon on Monday. We'll see widespread 90s throughout the Sacramento and northern San Joaquin Valleys through much of this next week, equating to about 10 to 15 degrees above late September climatology. Some forecast models go even hotter than the official forecast (which leans on the National Blend of Models), suggesting low 100s for a good portion of the Sacramento Valley. Heat risk will generally be low to moderate, mainly impacting sensitive groups and/or those outdoors for prolonged periods.

// Rowe

EXTENDED DISCUSSION (Thursday THROUGH Sunday). Above normal temperatures are forecast into the first week of October. For those keeping tally, Downtown Sacramento has recorded 105 days this year at/above 90 deg F, ranking second all-time. The record is 110 days, which occurred in 1984. If the present forecast remains on track, 2020 will overtake 1984 by the end of next week.

Dry conditions are forecast to prevail through the extended period.

AVIATION. VFR conditions are currently forecast for the next 24 hours; however, with increasing northerly and easterly winds, smoke from the wild fires may bring lowered visibility and/or ceilings to TAF sites. Expect to see increasing winds throughout the overnight hours, with sustained valley wind speeds ranging from 15 to 30 kt. Gusts up to 40 kt or so will be possible at times, especially for sites north of Sacramento. For the mountains and foothills gusts up to 40 to 45 kt may be possible, especially for wind prone canyons, gaps, and ridgetops.

STO WATCHES/WARNINGS/ADVISORIES. Red Flag Warning until 9 PM PDT Monday for Carquinez Strait and Delta-Central Sacramento Valley in Glenn, Colusa, Yuba, Northern Sutter, and Butte County Below 1000 Ft-Eastern Mendocino NF- Eastern Portion of Shasta/Trinity NF-Northern Motherlode From 1000 to 3000 Ft. Includes portions of Nevada-Yuba-Placer-Amador and ElDorado Units-Northern Sacramento Valley to Southern Tehama County Line Below 1000 Ft-Northern San Joaquin Valley in San Joaquin and Stanislaus Counties Below 1000 ft-Northern Sierra Foothills from 1000 to 3000 Ft. Includes portions of Shasta- Trinity and Butte Units-Northern Sierra Including Lassen NP and Plumas and Lassen NF/S West of the Sierra Crest (West of Evans Peak-Grizzly Peak-Beckworth Peak)-Northern Sierra Including the Tahoe and ElDorado NF/S West of the Sierra Crest-Southeast Edge Shasta-Trinity NF and Western Portions of Tehama-Glenn Unit- Southern Motherlode From 1000 to 3000 Ft. Includes portions of Calaveras-Tuolumne Unit-Southern Sacramento Valley in Yolo- Sacramento Far Western Placer, southern Sutter and Solano County Below 1000 Ft-Stanislaus NF West of the Sierra Crest.

Wind Advisory until 2 PM PDT Monday for Carquinez Strait and Delta-Central Sacramento Valley-Mountains Southwestern Shasta County to Western Colusa County-Northeast Foothills/Sacramento Valley-Northern Sacramento Valley-Shasta Lake Area / Northern Shasta County-Southern Sacramento Valley-Western Plumas County/Lassen Park.




Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
PCOC1 - 9415144 - Port Chicago, CA 66 mi49 min 70°F 69°F1012.8 hPa
SFXC1 - San Francisco Bay Reserve, CA 69 mi112 min E 5.1
RTYC1 - 9414523 - Redwood City, CA 76 mi49 min 67°F 72°F1013.8 hPa

Wind History for Port Chicago, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Modesto City-County Airport - Harry Sham Field, CA15 mi44 minNW 810.00 miFair73°F48°F43%1012.7 hPa
Stockton, Stockton Metropolitan Airport, CA23 mi42 minVar 410.00 miFair74°F48°F40%1012.9 hPa

Link to 5 minute data for KMOD

Wind History from MOD (wind in knots)
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Tide / Current Tables for Grant Line Canal (drawbridge), Old River, California
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Grant Line Canal (drawbridge)
Click for Map
Sun -- 02:45 AM PDT     Moonset
Sun -- 05:13 AM PDT     3.46 feet High Tide
Sun -- 06:58 AM PDT     Sunrise
Sun -- 12:43 PM PDT     -0.14 feet Low Tide
Sun -- 05:20 PM PDT     Moonrise
Sun -- 06:47 PM PDT     3.34 feet High Tide
Sun -- 06:53 PM PDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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1.21.62.22.83.23.53.432.41.71.10.4-0-0.10.20.91.82.63.23.332.51.91.4

Tide / Current Tables for Brandt Bridge, San Joaquin River, California Current
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Brandt Bridge
Click for Map
Sun -- 12:02 AM PDT     0.00 knots Slack
Sun -- 02:44 AM PDT     Moonset
Sun -- 02:46 AM PDT     0.53 knots Max Flood
Sun -- 05:14 AM PDT     -0.00 knots Slack
Sun -- 06:57 AM PDT     Sunrise
Sun -- 09:53 AM PDT     -1.13 knots Max Ebb
Sun -- 01:36 PM PDT     0.00 knots Slack
Sun -- 04:38 PM PDT     0.71 knots Max Flood
Sun -- 05:19 PM PDT     Moonrise
Sun -- 06:53 PM PDT     Sunset
Sun -- 07:07 PM PDT     -0.00 knots Slack
Sun -- 10:18 PM PDT     -0.76 knots Max Ebb
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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-00.30.50.50.40.1-0.3-0.6-0.9-1.1-1.1-1-0.7-0.30.10.50.70.70.40-0.3-0.6-0.7-0.7

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.
Link to Loop

Other links: Northern Pacific     Contential US     Full GOES-East
Ground Weather Radar Station Sacramento, CA
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weather_mapweather_map weather_map


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