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Marine Weather and Tides
Version 3.4 |
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. 6/2/2019. Many thanks to a user for reporting an error on one of the Edit pages. The switch to PHP 7.2 caused many pages that previously worked to quit working. I fixed many but I still depend on users to report ones I missed. Please report errors HERE or send an email to me at L-36.com. Allen |
| Sunrise 7:07AM | Sunset 4:51PM | Friday December 6, 2019 7:26 AM PST (15:26 UTC) | Moonrise 2:03PM | Moonset 1:36AM | Illumination 72% |  |
PZZ531 San Francisco Bay South Of The Bay Bridge- 250 Am Pst Fri Dec 6 2019
.small craft advisory in effect from 7 am pst this morning through Saturday evening...
Today..SE winds 10 to 20 kt with gusts up to 30 kt. A chance of rain this afternoon.
Tonight..SE winds 10 to 20 kt with gusts up to 30 kt. Rain.
Sat..S winds 15 to 20 kt with gusts up to 40 kt. Rain and a slight chance of Thunderstorms.
Sat night..S winds 5 to 15 kt with gusts up to 25 kt. Rain.
Sun..W winds 5 to 15 kt. Rain likely.
Sun night..NW winds 5 to 15 kt.
Mon..N winds around 5 kt.
Tue..NE winds around 5 kt. Winds and wind waves higher in and near Thunderstorms.
.small craft advisory in effect from 7 am pst this morning through Saturday evening...
Today..SE winds 10 to 20 kt with gusts up to 30 kt. A chance of rain this afternoon.
Tonight..SE winds 10 to 20 kt with gusts up to 30 kt. Rain.
Sat..S winds 15 to 20 kt with gusts up to 40 kt. Rain and a slight chance of Thunderstorms.
Sat night..S winds 5 to 15 kt with gusts up to 25 kt. Rain.
Sun..W winds 5 to 15 kt. Rain likely.
Sun night..NW winds 5 to 15 kt.
Mon..N winds around 5 kt.
Tue..NE winds around 5 kt. Winds and wind waves higher in and near Thunderstorms.
PZZ500 250 Am Pst Fri Dec 6 2019
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... A 985 mb low centered 600 miles west of cape blanco will move east towards the northern california coast by Saturday night. This will bring another round of gusty southerly winds to the coastal waters with gale force winds developing today and persisting through tonight. These winds will generate large wind waves and hazardous seas. Moderate west swell will gradually build to around 10 to 12 feet tonight and continue through Saturday night. Showers and isolated Thunderstorms will be possible this evening through Saturday.
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... A 985 mb low centered 600 miles west of cape blanco will move east towards the northern california coast by Saturday night. This will bring another round of gusty southerly winds to the coastal waters with gale force winds developing today and persisting through tonight. These winds will generate large wind waves and hazardous seas. Moderate west swell will gradually build to around 10 to 12 feet tonight and continue through Saturday night. Showers and isolated Thunderstorms will be possible this evening through Saturday.
7 Day Forecast for Marine Location Near San Leandro, CA
Hourly EDIT Helplocation: 37.68, -122.17 debug
Area Discussion for - San Francisco/Monterey Bay Area, CA
(on/off) Help NOTE: mouseover dotted underlined text for definitionFXUS66 KMTR 061205 AFDMTR
Area Forecast Discussion National Weather Service San Francisco Bay Area 405 AM PST Fri Dec 6 2019
SYNOPSIS. Southerly winds will continue to increase today ahead of an incoming cold front. Rain will develop across the North Bay this afternoon and then spread southward tonight. Showery and cool on Saturday with isolated thunderstorms possible. Lingering showers on Sunday but trending drier by afternoon. Dry weather returns Monday and Tuesday with a slight chance of rain by midweek.
DISCUSSION. as of 2:55 AM PST Friday . Well defined surface cold front and upper low show up clearly on satellite early this morning. The cold core low is slightly out of phase with the surface cold front and the main rains will be slightly delayed. The morning impacts will include some pockets of dense fog, especially interior valleys with places like Concord currently reporting 1/2 mile fog. The southerly winds will increase through the day as the front approaches. We are already seeing sustained 17 mph southeast winds at Salinas as winds drain out of the Salinas Valley and up towards the center of the low circulation. Southeast winds are picking up at the coastal buoys as well, a sure sign of a classic winter time cold frontal passage.
Good news is the morning commute should remain dry. Frontal rains will reach the Sonoma coast by early afternoon bringing steady rains to the region. Rain will become more widespread along the coast but the heavier rains now look to hold off until the evening hours for the bulk of the Bay Area and Central Coast. Despite decent cold advection the surface front will lose some of its identity as it passes from north to south. Scenario is now looking like a more run of the mill Bay Area cold frontal passage where the North Bay, Santa Cruz mtns and Santa Lucia hills along the Big Sur coast will see impressive rainfall totals but many of the interior valleys will remain much drier. Updated qpf forecasts wont show much change but the overall trend looks slightly drier. Will say the 00z nam came in very wet but since then the 00/06z gfs and 00z ecmwf were drier and now more in line with the 06z nam model. Latest graphics will still show some 3-4 inch maxes for the North Bay hills with 1.5-3 inches for the Santa Cruz/Santa Lucia mtns. Rain shadowed Santa Clara/Salinas Valleys 0.25-0.50 on average with 0.50-1.00 inch elsewhere when all is said and done.
The Flash Flood watch for the Kincade burn area still looks valid with all models showing a bullseye of qpf in that area and the front strongest as it moves through northern Sonoma county this evening. Will need to monitor any convective lines and short term rain rates that could lead to problems over the burn area. The 00z nam was coming up with big qpf numbers as it tried to focus a secondary boundary over the Sonoma hills but that feature isn't showing up on the 06z runs.
Saturday looks cool and showery with isolated thunderstorms certainly possible. Fairly steep lapse rates and cooling aloft will likely mean small hail would be the biggest threat with any storms on Saturday.
Shower activity lingers into Sunday as the main upper low finally rotates over the region but Sunday looks drier and less active than Saturday for any outdoor plans.
Dry weather returns Monday and Tuesday with seasonable temperatures as high pressure rebuilds. A weak front may try and knock into the ridge by Weds with a slight chance of rain but not expecting anything of significance at this time.
Getting some mixed signals in the extended. Not seeing much chance of strong storms next week but by mid December the PNA may trend negative with the MJO trying to stay organized out in phase 3/4 which correlates with wetter than normal for December.
AVIATION. as of 04:05 AM PST Friday . For 12z TAFs. Low level clouds have decreased slightly as the next storm system approaches with most terminals now reporting VFR conditions. As the front approaches later today expect low level clouds to increase once again with borderline MVFR/VFR conditions. Scattered light rain showers will be possible much of the day across the North Bay ahead of the front. The main front and band of rainfall looks to arrive from north to south from 00-06z this evening. Mainly light rain is expected but periods of moderate rain are possible, heaviest in the North Bay. Southeast winds will increase today ahead of the front and become gusty this afternoon and evening. Possible LLWS today as well as southeast winds will approach 45-50 kt at 2000 feet AGL this evening.
Vicinity of KSFO . SCT/BKN clouds with bases around 3000-4000 feet this morning will gradually lower to around 2500 feet late this afternoon as a cold front approaches. Southeast winds will increase this morning and become stronger through the afternoon. Winds by 15z will gust to around 15 kt and increase to 25-30 kt this afternoon. Gusts up to 35 kt are possible this evening. Expecting the front and rain to arrive 00-03z with light to possible periods of moderate rain. LLWS will be a concern through the day as winds aloft increase more than the surface winds.
SFO Bridge Approach . Similar to KSFO.
Monterey Bay Terminals . Cigs remaining in the VFR range this morning. Clouds with bases 3000-5000 feet will gradually increase today ahead of a cold front. The front will bring rain showers to the terminals this evening and overnight. Southeast winds will increase through the day, strongest at KSNS where gusts to near 30 kt are likely this afternoon and 30-35 kt this evening.
MARINE. as of 02:50 AM PST Friday . A 985 mb low centered 600 miles west of Cape Blanco will move east towards the northern California coast by Saturday night. This will bring another round of gusty southerly winds to the coastal waters with gale force winds developing today and persisting through tonight. These winds will generate large wind waves and hazardous seas. Moderate west swell will gradually build to around 10 to 12 feet tonight and continue through Saturday night. Showers and isolated thunderstorms will be possible this evening through Saturday.
MTR WATCHES/WARNINGS/ADVISORIES. Tday. Wind Advisory . CAZ006-505>513-516>518-528>530 Flash Flood Watch . CAZ506-507 SCA . Pt Reyes to Pigeon Pt 0-10 nm until 3 PM SCA . Pigeon Pt to Pt Pinos 0-10 nm until 3 PM SCA . Pt Pinos to Pt Piedras Blancas 0-10 nm until 3 PM SCA . Pigeon Pt to Pt Piedras Blancas 10-60 nm until 3 PM GLW . SF Bay from 3 PM GLW . Pt Reyes to Pigeon Pt 0-10 nm from 3 PM GLW . Pigeon Pt to Pt Pinos 0-10 nm from 3 PM GLW . Pt Pinos to Pt Piedras Blancas 0-10 nm from 3 PM GLW . Pigeon Pt to Pt Piedras Blancas 10-60 nm from 3 PM GLW . Pt Arena to Pt Reyes 0-10 nm GLW . Pt Arena to Pigeon Pt 10-60 nm SCA . Mry Bay from 3 PM SCA . SF Bay from 7 AM until 3 PM
PUBLIC FORECAST: RWW AVIATION: ST MARINE: ST
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Weather Reporting Stations
EDIT (on/off) Help NOTE: Click on distance to see the station location on a mapWind History for Alameda, CA
(wind in knots) EDIT (on/off) Help| 7 AM | 8 AM | 9 AM | 10 AM | 11 AM | 12 PM | 1 PM | 2 PM | 3 PM | 4 PM | 5 PM | 6 PM | 7 PM | 8 PM | 9 PM | 10 PM | 11 PM | 12 AM | 1 AM | 2 AM | 3 AM | 4 AM | 5 AM | 6 AM | |
| Last 24hr | -- | -- | NW | N | NW | W | W | N | W | N | N | NW | NW | N | N | E | E | E | E | SE | E | E | E G10 | SE G12 |
| 1 day ago | -- | -- | S G4 | E | SW | NW | -- | -- | N | S | W | E | E | SW | W | E | -- | |||||||
| 2 days ago | SE G7 | SE | W | SW | SW | -- | -- | W | S | SE | SE | E | NW G4 | N G8 | N | NW | -- | -- |
Airport Reports
EDIT (on/off) Help Click EDIT to display multiple airports. Follow links for more data.| Airport | Dist | Age | Wind kt | Visibility | Sky/Weather | Temp | DewPt | Humidity | Pressure |
| Hayward, Hayward Air Terminal, CA | 3 mi | 33 min | SE 8 | 10.00 mi | Mostly Cloudy | 58°F | 48°F | 72% | 1017.6 hPa |
| Oakland, Metro Oakland International Airport, CA | 3 mi | 34 min | SE 7 | 10.00 mi | Mostly Cloudy | 58°F | 50°F | 75% | 1016.9 hPa |
| San Carlos Airport, CA | 11 mi | 35 min | Var 3 | 10.00 mi | Mostly Cloudy | 55°F | 53°F | 94% | 1017.3 hPa |
| San Francisco, San Francisco International Airport, CA | 11 mi | 91 min | N 0 | 10.00 mi | Mostly Cloudy | 55°F | 51°F | 87% | 1016.2 hPa |
| Palo Alto Airport, CA | 14 mi | 40 min | SE 7 | 10.00 mi | Mostly Cloudy | 55°F | 51°F | 88% | 1016.9 hPa |
| Livermore, Livermore Municipal Airport, CA | 19 mi | 34 min | N 0 | 0.25 mi | Fog | 47°F | 46°F | 97% | 1017 hPa |
| Half Moon Bay Airport, CA | 21 mi | 32 min | SSE 12 | 10.00 mi | Overcast | 57°F | 51°F | 82% | 1016.6 hPa |
| Concord, Buchanan Field, CA | 22 mi | 34 min | NW 4 | 0.25 mi | Fog | 52°F | 50°F | 93% | 1015.9 hPa |
Link to 5 minute data for KOAK
Wind History from OAK (wind in knots)
| 8 AM | 9 AM | 10 AM | 11 AM | 12 PM | 1 PM | 2 PM | 3 PM | 4 PM | 5 PM | 6 PM | 7 PM | 8 PM | 9 PM | 10 PM | 11 PM | 12 AM | 1 AM | 2 AM | 3 AM | 4 AM | 5 AM | 6 AM | 7 AM | |
| Last 24hr | Calm | Calm | Calm | Calm | W | W | Calm | W | NW | N | N | NW | NW | Calm | NE | Calm | SE | E | E | E | E | E | E | SE |
| 1 day ago | E | NE | E | E | Calm | E | W | NE | E | E | NE | NE | Calm | E | E | Calm | Calm | S | SE | Calm | Calm | Calm | Calm | Calm |
| 2 days ago | SE | SE | S | G14 | S | S | Calm | W | W | S | Calm | SE | Calm | Calm | SE | SE | E | NE | N | N | NE | SE | Calm | E |
Tide / Current Tables for Roberts Landing, 1.3 miles west of, San Francisco Bay, California
EDIT Weekend mode (on/off) (on/off) Help One Week of DataRoberts Landing
Click for Map
Fri -- 01:35 AM PST Moonset
Fri -- 02:02 AM PST 1.41 feet Low Tide
Fri -- 07:09 AM PST Sunrise
Fri -- 08:26 AM PST 6.79 feet High Tide
Fri -- 02:02 PM PST Moonrise
Fri -- 03:28 PM PST 1.66 feet Low Tide
Fri -- 04:49 PM PST Sunset
Fri -- 08:45 PM PST 5.40 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Click for Map
Fri -- 01:35 AM PST Moonset
Fri -- 02:02 AM PST 1.41 feet Low Tide
Fri -- 07:09 AM PST Sunrise
Fri -- 08:26 AM PST 6.79 feet High Tide
Fri -- 02:02 PM PST Moonrise
Fri -- 03:28 PM PST 1.66 feet Low Tide
Fri -- 04:49 PM PST Sunset
Fri -- 08:45 PM PST 5.40 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
| 12 am | 1 am | 2 am | 3 am | 4 am | 5 am | 6 am | 7 am | 8 am | 9 am | 10 am | 11 am | 12 pm | 1 pm | 2 pm | 3 pm | 4 pm | 5 pm | 6 pm | 7 pm | 8 pm | 9 pm | 10 pm | 11 pm |
| 2.4 | 1.7 | 1.4 | 1.7 | 2.6 | 3.8 | 5.1 | 6.1 | 6.7 | 6.7 | 6.2 | 5.3 | 4.1 | 3 | 2.1 | 1.7 | 1.8 | 2.4 | 3.4 | 4.5 | 5.2 | 5.4 | 5.1 | 4.3 |
Tide / Current Tables for Oakland Airport SW, South San Francisco Bay, California Current
EDIT (on/off) Help One Week of DataOakland Airport SW
Click for Map
Fri -- 01:36 AM PST Moonset
Fri -- 01:39 AM PST 0.00 knots Slack
Fri -- 05:01 AM PST 0.54 knots Max Flood
Fri -- 07:09 AM PST Sunrise
Fri -- 08:07 AM PST -0.00 knots Slack
Fri -- 10:49 AM PST -0.58 knots Max Ebb
Fri -- 02:02 PM PST Moonrise
Fri -- 02:38 PM PST 0.01 knots Slack
Fri -- 04:49 PM PST Sunset
Fri -- 05:41 PM PST 0.43 knots Max Flood
Fri -- 08:30 PM PST -0.00 knots Slack
Fri -- 10:55 PM PST -0.49 knots Max Ebb
Tide / Current data from XTide NOT FOR NAVIGATION
Click for Map
Fri -- 01:36 AM PST Moonset
Fri -- 01:39 AM PST 0.00 knots Slack
Fri -- 05:01 AM PST 0.54 knots Max Flood
Fri -- 07:09 AM PST Sunrise
Fri -- 08:07 AM PST -0.00 knots Slack
Fri -- 10:49 AM PST -0.58 knots Max Ebb
Fri -- 02:02 PM PST Moonrise
Fri -- 02:38 PM PST 0.01 knots Slack
Fri -- 04:49 PM PST Sunset
Fri -- 05:41 PM PST 0.43 knots Max Flood
Fri -- 08:30 PM PST -0.00 knots Slack
Fri -- 10:55 PM PST -0.49 knots Max Ebb
Tide / Current data from XTide NOT FOR NAVIGATION
| 12 am | 1 am | 2 am | 3 am | 4 am | 5 am | 6 am | 7 am | 8 am | 9 am | 10 am | 11 am | 12 pm | 1 pm | 2 pm | 3 pm | 4 pm | 5 pm | 6 pm | 7 pm | 8 pm | 9 pm | 10 pm | 11 pm |
| -0.3 | -0.2 | 0.1 | 0.3 | 0.5 | 0.5 | 0.5 | 0.3 | 0 | -0.3 | -0.5 | -0.6 | -0.5 | -0.4 | -0.2 | 0.1 | 0.3 | 0.4 | 0.4 | 0.3 | 0.1 | -0.2 | -0.4 | -0.5 |
Weather Map
(on/off) Help Weather Map
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
Wind Forecast for San Francisco/Monterey Bay Area, CA (10,2,3,4)
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Ground Weather Radar Station San Francisco Bay Area, CA
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