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Marine Weather and Tides
Version 3.4 |
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 6:31AM | Sunset 6:07PM | Friday March 5, 2021 9:24 PM PST (05:24 UTC) | Moonrise 12:39AM | Moonset 10:41AM | Illumination 50% |  |
PZZ531
PZZ500
7 Day Forecast for Marine Location Near Castro Valley, CA
Hourly EDIT Help
location: 37.71, -122.07 debug
Area Discussion for - San Francisco/Monterey Bay Area, CA
(on/off) Help NOTE: mouseover dotted underlined text for definitionFXUS66 KMTR 060505 AFDMTR
Area Forecast Discussion National Weather Service San Francisco Bay Area 905 PM PST Fri Mar 5 2021
SYNOPSIS. Have observed rain bands gradually move into coastal Sonoma County this evening. Rain is still looking to move across the area later tonight. Rain totals do not look impressive, as the system will move over the area too fast for much to accumulate. Temperatures will remain cool this weekend and onshore winds breezy Saturday, becoming light Sunday. More chances for rain remaining in the forecast for early next week, keeping temperatures cooler than normal. Warming trend possible next Friday.
DISCUSSION. as of 09:06 PM PST Friday . KMUX picking up on rain bands beginning their approach into coastal Sonoma and Marin counties this evening as the cold front inches closer to the CWA. Preliminary 3-hour precip totals have come in ranging anywhere from trace amounts to five hundredths of an inch at some of the highest peaks in extreme NW Sonoma County. Farther south have observed an increase in moisture levels at the low to mid levels as evidenced by the afternoon OAK sounding, which resulted in a gradual buildup of low/mid level CU's that gradually became more widespread across the Santa Cruz Mountains and other coastal ranges. All in all, the environment is conducive for the rain showers that will eventually move across the full length of the Bay Area and portions of the Central Coast tonight and into early tomorrow morning.
Are still on track for Fri Night-Sat Morn totals from morning forecast package, with totals between 0.1-0.25 inches in the City and slightly higher totals between 0.25-0.5 inches over much of the SF Peninsula. Across the Bay will see totals between 0.1-0.25 inches, with the South Bay also progged for similar totals. The highest totals will of course be in the North Bay where the culmination of the early onslaught from the rain bands and some lingering showers, coupled with orographic lift, will result in the highest coastal peaks in the North Bay getting as high as 0.75 inches overnight, while the foothills and valleys will get between 0.25-0.50 inches. Orographic lift will also aid in producing higher totals in the Santa Cruz Mountains, but only expecting up to 0.25 inches there while coastal Santa Cruz will come out of this overnight event with totals similar to the South Bay. Rain bands will not survive for long once they exit the favorable environment as they track south into Monterey Bay. Are expecting them to mostly fall apart so only expecting trace amounts at most from the Monterey Peninsula to San Benito County.The exception will be the Big Sur Coast where orography will once again aid in creating a more favorable environment for some showers to redevelop; are only forecasting up to 0.25 inches there. Nonetheless, concerns still permeate across the area owing to the damage caused to Highway One during the January AR, so will keep an eye on rain rates. The good news is that this system has not shown high rainfall rates over NorCal earlier this afternoon and given current precip water values are not progging heavy rainfall with this system. May still seem some moderate bands overnight, particularly in some of the urban areas in the SF Bay. Be sure to practice safe driving while driving in the rain.
Skies will briefly clear this weekend across the CWA as the drier air mass behind the frontal boundary settles into Northern and Central California through Sunday night. As such, max temps will be a couple of degrees cooler than what has been observed over the last few days along the Coast and several degrees cooler in the interior through Saturday and Sunday, with most of the CWA only getting up into the upper 50s to low 60s F.
This break in the wet pattern will be short-lived as another upper- level trough descends into the 140W void starting around Monday. EC, GFS, and C clusters are all showing high confidence in the amplitude of this system and it taking aim at Northern and Central California. This is in stark contrast to the pattern that we observed during nearly all of last month where the upper-level ridge did not let up in the slightest. Zonal flow across the PAC and the retrogression of the upper-level ridge will greatly aid in providing a favorable environment that is conducive for rain showers to scatter into our CWA as early as Monday evening. The proximity of the vort max of this upcoming low to subtropical moisture, coupled with the previously mentioned zonal flow across the ocean, will allow for a stream of moisture returns through Tuesday and all the way out into Thursday. As such, are looking at strong confidence that we will see some more noteworthy rainfall totals between Monday through Thursday of next week. Are looking at the potential for 1.5 inch totals along he coastal ranges while the interior valleys and hills are looking to range between 0.25- 0.50 inches, with some of the highest interior totals getting up to 0.75 inches. T
Two things to note about these totals: 1)they are subject to change and more fine tuning between now and this upcoming event given we are still a couple of days out and 2) these are totals over several days. Given the slow nature of these streaming moisture returns and the low IVT values on the most recent deterministic model runs, looking like this setup will make for low to moderate rainfall rates (at most) across much of the CWA (this is good news for burn scars as lower rainfall rates keep debris flow concerns down). The outlook for the end of this event is in concert with the longer-range outlook, which is hinting at the upper-level ridge quickly building back into its original domain by Friday and into the upcoming weekend. Ensemble members pick up on its return which makes sense as some of the EC weeklies were also hinting earlier this week at the zonal PAC flow through the middle of March. For now, will take what we can get.
AVIATION. as of 7:24 PM PST Friday . For the 00Z TAFs. It's VFR-MVFR though a cold front will bring lower cigs and rain tonight and Saturday morning. Winds gusty ahead of the front and with the frontal passage. Showers quickly ending behind the front. A few low ceilings lingering early Saturday then transitioning to VFR with clearing Saturday. Vicinity of KSFO . VFR to MVFR tonight and Saturday morning. Gusty southwesterly winds prior to frontal boundary passage Rain starting mid to late evening tapering off to showers Saturday morning. Ceiling lifting to VFR mid-morning Saturday.
SFO Bridge Approach . Similar to KSFO.
Monterey Bay Terminals . VFR to MVFR tonight and Saturday morning. Southerly winds prior to frontal boundary passage late tonight and Saturday morning. Light rain to showers accompanying the front. A few showers may linger early Saturday, but clearing Saturday.
MARINE. as of 09:03 PM PST Friday . Locally gusty southerly winds will continue as a cold front inches closer to the coast early tonight. The cold front will then move through the coastal waters tonight and early Saturday resulting in gusty winds and periods of rain. A longer period moderate northwest swell will also continue to result in hazardous conditions for small craft through Saturday before subsiding on Sunday. Another low pressure system approaching from the northwest will bring more rain and larger swell early to mid next week.
MTR WATCHES/WARNINGS/ADVISORIES. Tngt. SCA . Pigeon Pt to Pt Pinos 0-10 nm SCA . Pt Arena to Pt Reyes 0-10 nm SCA . Pt Arena to Pigeon Pt 10-60 nm SCA . Pt Pinos to Pt Piedras Blancas 0-10 nm SCA . Pt Reyes to Pigeon Pt 0-10 nm SCA . Pigeon Pt to Pt Piedras Blancas 10-60 nm
PUBLIC FORECAST: Diaz AVIATION: Canepa MARINE: MM
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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| 10 PM | 11 PM | 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 | |
| Last 24hr | N G5 | NE | -- | N | N | N | NE | N | E | E | SE | SE | S | S | S | NW G7 | W | W G11 | SW | S G12 | S | S | S G12 | SE G16 |
| 1 day ago | W G10 | W G9 | W | SW | SW G11 | SW | SW | S | E | E | E | E | S | N | NW G7 | W | W G8 | W G8 | W | W | W | W | N | -- |
| 2 days ago | E | E G4 | E | E | E | SE | S | S | W | W | W G18 | W G13 | W G16 | W G15 | SW G12 | SW | SW |
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 | 4 mi | 30 min | SSE 9 | 10.00 mi | Mostly Cloudy | 58°F | 46°F | 65% | 1017 hPa |
| Oakland, Metro Oakland International Airport, CA | 8 mi | 31 min | S 17 G 22 | 10.00 mi | Mostly Cloudy | 61°F | 51°F | 70% | 1015.5 hPa |
| Livermore, Livermore Municipal Airport, CA | 13 mi | 31 min | WSW 3 | 10.00 mi | Mostly Cloudy | 55°F | 44°F | 67% | 1016.3 hPa |
| San Carlos Airport, CA | 16 mi | 37 min | SSE 8 | 10.00 mi | A Few Clouds | 57°F | 48°F | 72% | 1016.9 hPa |
| Palo Alto Airport, CA | 16 mi | 37 min | SSW 9 | 10.00 mi | A Few Clouds | 57°F | 46°F | 67% | 1016.9 hPa |
| San Francisco, San Francisco International Airport, CA | 17 mi | 28 min | SSE 15 | 10.00 mi | Mostly Cloudy | 58°F | 52°F | 81% | 1014.8 hPa |
| Concord, Buchanan Field, CA | 19 mi | 31 min | S 10 | 10.00 mi | Mostly Cloudy | 58°F | 47°F | 67% | 1014 hPa |
| Mountain View, Moffett Field, CA | 19 mi | 29 min | SE 6 | 10.00 mi | Mostly Cloudy | 59°F | 45°F | 59% | 1016.9 hPa |
Link to 5 minute data for KHWD
Wind History from HWD (wind in knots)
| 10 PM | 11 PM | 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 | |
| Last 24hr | NE | NE | E | N | NE | NE | NE | Calm | E | NE | E | Calm | Calm | Calm | NW | W | W | NW | NW | W | W | S | S | S |
| 1 day ago | NW | N | NW | W | Calm | Calm | NE | E | NE | Calm | Calm | Calm | Calm | N | W | W | W | W | NW | NW | N | N | NE | |
| 2 days ago | Calm | NE | NE | E | Calm | NE | Calm | Calm | NE | NE | NE | Calm | SE | SW | W | W | W | NW | W | W | W | NW | NW | W |
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
Sat -- 01:49 AM PST Moonrise
Sat -- 05:40 AM PST 7.33 feet High Tide
Sat -- 06:32 AM PST Sunrise
Sat -- 11:29 AM PST Moonset
Sat -- 01:27 PM PST 0.09 feet Low Tide
Sat -- 06:07 PM PST Sunset
Sat -- 08:24 PM PST 5.62 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Click for Map
Sat -- 01:49 AM PST Moonrise
Sat -- 05:40 AM PST 7.33 feet High Tide
Sat -- 06:32 AM PST Sunrise
Sat -- 11:29 AM PST Moonset
Sat -- 01:27 PM PST 0.09 feet Low Tide
Sat -- 06:07 PM PST Sunset
Sat -- 08:24 PM PST 5.62 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 |
| 2.9 | 3.3 | 4.2 | 5.3 | 6.4 | 7.2 | 7.3 | 6.9 | 5.9 | 4.5 | 3 | 1.6 | 0.6 | 0.1 | 0.2 | 0.8 | 1.8 | 2.9 | 4.1 | 5.1 | 5.6 | 5.5 | 5 | 4.2 |
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
Sat -- 01:49 AM PST Moonrise
Sat -- 02:43 AM PST 0.40 knots Max Flood
Sat -- 05:35 AM PST -0.00 knots Slack
Sat -- 06:32 AM PST Sunrise
Sat -- 08:52 AM PST -0.81 knots Max Ebb
Sat -- 11:30 AM PST Moonset
Sat -- 12:58 PM PST 0.01 knots Slack
Sat -- 04:29 PM PST 0.61 knots Max Flood
Sat -- 06:07 PM PST Sunset
Sat -- 07:49 PM PST -0.01 knots Slack
Sat -- 09:48 PM PST -0.29 knots Max Ebb
Tide / Current data from XTide NOT FOR NAVIGATION
Click for Map
Sat -- 01:49 AM PST Moonrise
Sat -- 02:43 AM PST 0.40 knots Max Flood
Sat -- 05:35 AM PST -0.00 knots Slack
Sat -- 06:32 AM PST Sunrise
Sat -- 08:52 AM PST -0.81 knots Max Ebb
Sat -- 11:30 AM PST Moonset
Sat -- 12:58 PM PST 0.01 knots Slack
Sat -- 04:29 PM PST 0.61 knots Max Flood
Sat -- 06:07 PM PST Sunset
Sat -- 07:49 PM PST -0.01 knots Slack
Sat -- 09:48 PM PST -0.29 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 |
| 0.1 | 0.2 | 0.4 | 0.4 | 0.3 | 0.1 | -0.1 | -0.5 | -0.7 | -0.8 | -0.7 | -0.6 | -0.3 | 0 | 0.3 | 0.5 | 0.6 | 0.6 | 0.5 | 0.2 | -0.1 | -0.3 | -0.3 | -0.2 |
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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