Marine Weather and Tides
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 6:55AM||Sunset 7:32PM||Monday March 30, 2020 12:58 PM PDT (19:58 UTC)||Moonrise 10:00AM||Moonset 12:00AM||Illumination 42%|
7 Day Forecast for Marine Location Near Point Arena, CAHourly EDIT Help
Area Discussion for - San Francisco/Monterey Bay Area, CA  (on/off)  Help NOTE: mouseover dotted underlined text for definition
FXUS66 KMTR 301838 AFDMTR
Area Forecast Discussion National Weather Service San Francisco Bay Area 1138 AM PDT Mon Mar 30 2020
SYNOPSIS. Light rain showers will be possible over portions of the North Bay today while dry conditions are likely elsewhere. Dry weather, along with seasonable temperatures, are forecast for most of the remainder of the week. Rain chances return late in the week and potentially continue into early next week.
DISCUSSION. as of 08:30 AM PDT Monday . Satellite imagery shows patchy low clouds remain across much of the region this morning. Dry conditions expected today for the most part aside from possible showers over portions of the North Bay today as a weak cold front moves inland to the north. Areas elsewhere are unlikely to see any precipitation from this weak system, particularly south of the Golden Gate. This will keep cloudy skies over much of the North Bay while the rest of the region experiences some clearing. Temperatures this morning are within a few degrees of yesterday with most locations currently in the low to mid 50s. Afternoon highs are expected mainly in the low to mid 60s with chillier temperatures in the hills and over parts of the North Bay. Forecast remains on track this morning with no updates needed. For additional details please see the previous discussion.
PREV DISCUSSION. as of 03:01 AM PDT Monday . Dry weather conditions have returned region-wide in wake of the weak system that brought light rainfall to portions of the region yesterday. Meanwhile, partly to mostly cloudy conditions persist this morning with temperatures ranging from the middle 40s to middle 50s. Low clouds over the region may help to limit fog development this morning, especially over the North Bay. Another weather system pushing inland to the north will bring the potential for light rainfall over northern portions of Sonoma and Napa Counties today. Meanwhile, dry conditions are likely to persist to the south, especially south of the Golden Gate.
Seasonably cool and dry conditions are then likely to persist region- wide through much of the week. While the forecast late last week was advertising a warming trend through the workweek, confidence has increased that this scenario will not materialize. Instead, cyclonic flow aloft will persist as a long-wave trough persists over the West. With this, only expecting daytime temperatures to warm into the upper 50s along the immediate coast to 60s inland. While we cannot rule out a few interior locations reaching the lower 70s this week, temperatures generally will remain near to slightly below seasonal averages.
Forecast models bring precipitation back to the region late Friday night to the North Bay and then across the remainder of the region on Saturday. The deterministic models diverge late in the weekend into early next week, yet ensembles support an unsettled pattern continuing with chances of precipitation increasing during the week of April 6th.
AVIATION. as of 11:38 AM PDT Monday . For 18Z TAFs. Cloud ceilings are a mix of VFR and MVFR. Cloud cover will tend to persist over the North Bay today, elsewhere partial clearing and mixing should help lift MVFR to VFR. Residual cool air will interact with a weak warm front approaching the North Bay later today and tonight with periodic light rain developing, to the south generally dry weather continues. A cold front arrives at the North Bay late Tuesday afternoon and north Central Coast Tuesday evening or night.
Vicinity of KSFO . VFR, light wind from the east to southeast shifting to west 10 to 15 knots this afternoon. MVFR forecast tonight and Tuesday morning.
SFO Bridge Approach . Similar to KSFO.
Monterey Bay Terminals . VFR, winds becoming west 10 to 15 knots this afternoon. MVFR forecast tonight and Tuesday morning.
MARINE. as of 10:41 AM PDT Monday . Generally light west to northwest winds will prevail over the coastal waters today except for gusty northwest winds over the southern inner waters and along the Big Sur Coast. By Tuesday afternoon and evening, winds are forecast to increase across all the waters, generating seas that are potentially hazardous to smaller vessels. Mixed swell will persist with a moderate northwest swell and a light southwesterly swell.
MTR WATCHES/WARNINGS/ADVISORIES. Tday. SCA . Pt Pinos to Pt Piedras Blancas 0-10 nm from 3 PM
PUBLIC FORECAST: AS/RGass AVIATION/MARINE: Canepa
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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.
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Wind Forecast for San Francisco/Monterey Bay Area, CA (15,3,4,5)(on/off)  Help
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