Friday, September25, 2020
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Marine Weather and Tides
Pacheco, 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 6:57AMSunset 7:01PM Friday September 25, 2020 6:23 AM PDT (13:23 UTC) Moonrise 3:03PMMoonset 12:00AM Illumination 58% Phase: Waxing Gibbous; Moon at 8 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- 251 Am Pdt Fri Sep 25 2020
Today..SW winds 5 to 15 kt.
Tonight..W winds 5 to 15 kt.
Sat..W winds 5 to 15 kt.
Sat night..W winds 5 to 15 kt. Hazy and areas of smoke.
Sun..SW winds up to 10 kt. Hazy and areas of smoke.
Sun night..N winds up to 10 kt. Hazy and areas of smoke.
Mon..NW winds 5 to 15 kt.
Tue..W winds 5 to 15 kt.
PZZ500 251 Am Pdt Fri Sep 25 2020
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... High pressure will strengthen off the california coast resulting in increasing northwest winds that will last through Saturday night. A larger long period northwest swell will continue through Friday with swell heights of 10 to 13 feet at periods of 13 to 15 seconds. SWell heights are expected to diminish tonight.


7 Day Forecast for Marine Location Near Pacheco, CA
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location: 37.98, -122.07     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
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FXUS66 KMTR 251221 AFDMTR

Area Forecast Discussion National Weather Service San Francisco Bay Area 521 AM PDT Fri Sep 25 2020

SYNOPSIS. Quiet weather to wind out the work week with sunny skies and seasonable temperatures. Noted warming trend starts by Saturday afternoon as offshore winds begin to develop. Offshore winds increase Saturday night into Sunday morning with Red Flag Warnings now in effect for the North and East Bay hills for critical fire weather conditions. Winds will ease on Sunday but hot and dry weather across the region. A second burst of offshore winds Sunday night into Monday morning with very warm and dry air in place. Continued unseasonably hot and dry Monday and Tuesday with only gradual cooling by midweek. West coast ridge stays in place through early October with no rain in sight for the Bay Area.

DISCUSSION. as of 4:16 AM PDT Friday . No short term concerns this morning. Just some patchy clouds from Pt Reyes to Pacifica along the coast as well as some cloud development over in the East Bay early this morning. Expect continued low cloud formation through sunrise with onshore winds in place. We do have another cold front taking aim at Oregon and far Northern California later today into early Saturday but no impacts for the Bay Area. Looks like chamber of commerce weather to wind out the work week with seasonable temperatures in the 70s and 80s for most of the region.

Expect patchy clouds along the coast again Saturday morning as we wait for offshore winds to develop. That should start to happen throughout the day Saturday allowing for some inland warming. Favorable north winds should start to reach the North and East Bay later Saturday afternoon as highs warm into the upper 80s and lower 90s with humidities lowering as dry north winds begin to develop.

Have upgraded the Fire Wx Watch to a Red Flag Warning, set to start at 9 pm Saturday night for the North and East Bay hills as well as the East Bay interior valleys. The 00z/06z NAM runs have trended slightly stronger with widespread 925 mb winds pegged at 40 kt. As is usually the case these winds will first show up across the Napa hills sometime around 9-10 pm Saturday night. Humidity values will start out fairly moist, above 30% but drying will persist all night. Please note most locations below 2000 feet will feel little or no wind Saturday night but the winds aloft will be blowing strong and acting to dry the airmass out. By Sunday morning the dry air will really be filtering into the Bay Area as north winds come down the Sac valley and spill into the Bay Area. Expect no fog Sunday morning, except perhaps from Monterey southward. The offshore winds will keep drying things out Sunday as temps soar into the 90s and lower 100s.

The models have trended stronger with winds on Sunday night and by this time humidity values will be in the teens, almost regionwide. The main trough axis is now progged farther westward over the Rockies. This is dropping a little more cool air into the Great Basin but more importantly giving some upper support. In addition, the stronger surface pressure gradient is over the Sierra. And finally the 595 dm high to the northwest of Cape Mendocino will induce some subsidence aloft as well. Model cross sections now show north to northeast flow through much of the depth of the troposphere. To be clear this event is nowhere near the strength of the 2017 wine country, 2018 Camp or the 2019 Kincade fires. However the setup is still critical. In fact by Sunday night with the main sfc gradient over the Sierra we will get a pure east wind event. Though not progged explicitly by the models as east winds come off the Sierra they will make a beeline towards Mt Diablo and the North Bay. Again there will be no humidity recovery Sunday night and the models show east winds driving all the way to the coast and offshore. The setup is lacking cold advection but this is the type of pattern where we can see winds mix down into the I-880 corridor/Berkeley hills by Monday morning as well as to the lee of Mt Tamalpais with coastal gaps such as Hwy 92 to Half Moon Bay seeing locally strong east winds as well. All that to say the Red Flag Warning goes through 8 am Monday.

Beyond that an atypical late season ridge stays in place Monday through at least the middle of next week with temps staying well above normal. Will need to consider at least some possible Heat Advisories as the event gets closer. However, still believe the valleys and populated locations will see decent night time cooling while the hills will stay warm in the 70s and lower 80s at night.

Long range models show a very stable pattern with West Coast ridge in place all of next week as it bulges northward into British Columbia. Main trough axis over the Upper Midwest and over the Aleutians suggests little or no chance of rain through the first week of October as temps stay well above normal. Of course from late Sept through Columbus Day is often a time for offshore winds and no rain.

AVIATION. As of 05:22 AM PDT Friday . For the 12z TAFs. Mix of VFR/MVFR, except IFR along the San Mateo coast. Satellite night imagery shows patchy stratus developing along the coast, and in East Bay near KOAK and KLVK. Expecting patchy stratus to continue through the early morning hours with a mixed out marine layer. VFR should prevail from late morning through early evening for most of the Bay Area. Winds will be onshore and moderate, though gusty around KSFO. Shallow Marine layer expected to return Friday night, bringing MVFR/IFR cigs to coastal terminals.

Vicinity of KSFO . VFR with tempo MVFR cig through early morning, as coastal stratus tries to penetrate coastal gaps and wrap around the Bay. Scattered clouds may linger through the morning. Breezy westerly winds easing a bit through the morning and ramping up for the afternoon 20 to 25 kt with higher gusts through early evening.

SFO Bridge Approach . Similar to KSFO.

Monterey Bay Terminals . VFR with light and variable winds through morning. Some low clouds possible in the morning hours with cigs possible but low confidence on that. WNW winds 10 to 15 knots for the afternoon with VFR conditions. Return of IFR cigs expected overnight into Saturday.

BEACHES. as of 4:00 PM PDT Thursday . A deep low in the Gulf of Alaska has produced a large long-period swell train that will impact the coastline through tomorrow afternoon. Swells by this afternoon 10 to 12 ft with a 15 to 16 second period. The main impacts will be increased wave heights breaking near the shoreline and an increased risk of rip currents developing along coastal beaches. This may produce breaking wave heights in the surf zone of 15 to 20 feet, particularly at west to northwest facing beaches. Therefore, a Beach Hazards Statement has been issued from 5 PM PDT this afternoon until 2 PM PDT Friday. With the increase in temperatures inland expected late in the week, beachgoers should be mindful of the increased wave activity and rip currents.The wave activity is forecast to subside into Friday evening.

CLIMATE. Here are the record high temperatures for Saturday through Monday .

. SATURDAY . SUNDAY . MONDAY SANTA ROSA . 103 in 2009 . 103 in 2010 . 104 in 2010 KENTFIELD . 99 in 2016 . 103 in 1921 . 102 in 1921 NAPA . 105 in 1963 . 101 in 1958 . 102 in 1966 RICHMOND . 97 in 2019 . 97 in 2010 . 97 in 2010 LIVERMORE . 103 in 1952 . 105 in 1963 . 105 in 2010 SAN FRANCISCO . 94 in 1992 . 93 in 2010 . 95 in 1966 SF AIRPORT . 95 in 1958 . 96 in 2010 . 95 in 2010 REDWOOD CITY . 99 in 1963 . 97 in 2010 . 98 in 2010 HALF MOON BAY . 90 in 1970 . 89 in 1966 . 91 in 1958 OAKLAND DOWNTOWN . 93 in 2016 . 95 in 1973 . 92 in 2010 SAN JOSE . 98 in 2016 . 98 in 1921 . 99 in 2010 GILROY . 104 in 1963 . 108 in 1963 . 101 in 1963 SANTA CRUZ . 101 in 1970 . 103 in 2010 . 100 in 1917 SALINAS . 101 in 2016 . 102 in 2010 . 99 in 1970 KING CITY . 105 in 1963 . 107 in 2010 . 102 in 1973

MARINE. as of 02:51 AM PDT Friday . High pressure will strengthen off the California coast resulting in increasing northwest winds that will last through Saturday night. A larger long period northwest swell will continue through Friday with swell heights of 10 to 13 feet at periods of 13 to 15 seconds. Swell heights are expected to diminish tonight.

MTR WATCHES/WARNINGS/ADVISORIES. Tday. 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 Pinos to Pt Piedras Blancas 0-10 nm SCA . Pt Arena to Pigeon Pt 10-60 nm SCA . Pigeon Pt to Pt Piedras Blancas 10-60 nm SCA . Mry Bay from 3 PM



PUBLIC FORECAST: RWW AVIATION: Lorber MARINE: W Pi

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Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
UPBC1 5 mi53 min SW 8 G 11
MZXC1 - 9415102 - Martinez-Amorco CA 5 mi53 min SSW 8.9 G 11 61°F 69°F1015.1 hPa
PCOC1 - 9415144 - Port Chicago, CA 6 mi53 min SSW 6 G 8.9 59°F 69°F1014.8 hPa
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 11 mi53 min W 8 G 14 64°F 1014.3 hPa
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 12 mi53 min WSW 11 G 13 62°F 1014.8 hPa
SFXC1 - San Francisco Bay Reserve, CA 15 mi98 min SW 5.1
PPXC1 - 9414847 - Richmond (Point Potrero), CA 16 mi53 min SSE 5.1 G 7 62°F 1015.9 hPa
LNDC1 17 mi53 min SE 4.1 G 5.1 61°F 1015.5 hPa
RCMC1 - 9414863 - Richmond, CA 18 mi53 min Calm G 1 62°F 66°F1015.3 hPa
OKXC1 - 9414776 - Oakland (Berth 34), CA 18 mi53 min SE 2.9 G 4.1 60°F 1015.6 hPa
OBXC1 19 mi53 min 61°F 60°F
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 19 mi53 min SSE 4.1 G 4.1
AAMC1 - 9414750 - Alameda, CA 19 mi53 min WSW 2.9 G 5.1 61°F 69°F1015.7 hPa
PXOC1 - 9414311 - San Francisco (Pier 1), CA 21 mi53 min SSE 2.9 G 5.1 60°F 1014.6 hPa
PXSC1 21 mi53 min 61°F
TIBC1 - Tiburon Pier, San Francisco Bay, CA 21 mi36 min Calm 59°F 1016 hPa
FTPC1 - 9414290 - San Francisco, CA 24 mi53 min WSW 6 G 8.9 58°F 64°F1015.7 hPa
46237 - San Francisco Bar, CA (142) 33 mi53 min 60°F9 ft
RTYC1 - 9414523 - Redwood City, CA 34 mi53 min E 1.9 G 2.9 61°F 73°F1016.8 hPa
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 44 mi33 min WNW 14 G 18 59°F10 ft1016.3 hPa

Wind History for Union Pacific Rail Road Bridge (UPRR), CA
(wind in knots)    EDIT      (on/off)   Help
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Concord, Buchanan Field, CA1 mi30 minS 1110.00 miFair60°F54°F80%1013.8 hPa
Napa, Napa County Airport, CA19 mi29 minN 010.00 miFair51°F48°F89%1014.3 hPa
Oakland, Metro Oakland International Airport, CA21 mi30 minW 810.00 miMostly Cloudy63°F55°F78%1015.8 hPa
Fairfield / Travis Air Force Base, CA22 mi85 minSW 1410.00 miFair57°F48°F74%1014.5 hPa
Hayward, Hayward Air Terminal, CA22 mi29 minW 710.00 miOvercast63°F55°F76%1016.7 hPa
Livermore, Livermore Municipal Airport, CA23 mi30 minSW 510.00 miOvercast60°F55°F84%1015.4 hPa

Link to 5 minute data for KCCR

Wind History from CCR (wind in knots)
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W14W14W11SW11SW10SE6S8S13S11S12S10S9S10S11
1 day agoS4S4S5SW4N6NW8NW10W9W11W13W14W12W9SW9SW8SW10SW10SW7SW11SE7SW10S10S8S5
2 days agoS14S11S11S10S8S7--W8W12W9W11
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Tide / Current Tables for Benicia, Carquinez Strait, California
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Benicia
Click for Map
Fri -- 12:45 AM PDT     Moonset
Fri -- 03:58 AM PDT     -0.04 feet Low Tide
Fri -- 06:59 AM PDT     Sunrise
Fri -- 10:27 AM PDT     4.23 feet High Tide
Fri -- 03:22 PM PDT     2.20 feet Low Tide
Fri -- 04:03 PM PDT     Moonrise
Fri -- 06:59 PM PDT     Sunset
Fri -- 09:28 PM PDT     4.88 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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2.61.70.90.2-00.20.91.82.83.74.24.13.73.12.52.22.32.73.44.14.64.84.84.4

Tide / Current Tables for Roe Island S, Suisun Bay, California Current
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Roe Island S
Click for Map
Fri -- 12:45 AM PDT     Moonset
Fri -- 02:44 AM PDT     -2.11 knots Max Ebb
Fri -- 06:51 AM PDT     0.00 knots Slack
Fri -- 06:59 AM PDT     Sunrise
Fri -- 09:53 AM PDT     0.78 knots Max Flood
Fri -- 12:47 PM PDT     -0.00 knots Slack
Fri -- 03:15 PM PDT     -1.08 knots Max Ebb
Fri -- 04:02 PM PDT     Moonrise
Fri -- 05:53 PM PDT     0.00 knots Slack
Fri -- 06:59 PM PDT     Sunset
Fri -- 08:27 PM PDT     0.70 knots Max Flood
Fri -- 11:34 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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-1.3-1.8-2-2.1-1.9-1.4-0.60.10.40.70.80.60.3-0.2-0.8-1.1-1-0.60.10.50.70.70.50.2

Weather Map
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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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