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Marine Weather and Tides
Version 3.4 |
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 7:04AM | Sunset 6:53PM | Thursday October 1, 2020 11:30 AM PDT (18:30 UTC) | Moonrise 6:15PM | Moonset 5:47AM | Illumination 100% |  |
PZZ545 Coastal Waters From Point Reyes To Pigeon Point California Out To 10 Nm- 816 Am Pdt Thu Oct 1 2020
Rest of today..NW winds 5 to 15 kt. Wind waves 1 to 2 ft. W swell 2 to 3 ft at 16 seconds and sw around 2 ft at 16 seconds. Hazy and areas of smoke.
Tonight..NW winds 10 to 20 kt. Wind waves 1 to 2 ft. W swell 4 to 6 ft at 16 seconds and sw around 2 ft at 15 seconds. Hazy and areas of smoke.
Fri..NW winds 10 to 20 kt with gusts up to 25 kt. Wind waves 2 to 3 ft. W swell 4 to 6 ft at 14 seconds and sw around 2 ft at 15 seconds. Hazy and areas of smoke.
Fri night..NW winds 10 to 20 kt with gusts up to 25 kt. Wind waves 3 to 4 ft. W swell 3 to 5 ft at 13 seconds and sw around 2 ft at 15 seconds. Hazy and areas of smoke.
Sat..NW winds 10 to 20 kt with gusts up to 25 kt. Wind waves 3 to 4 ft. W swell 2 to 4 ft at 14 seconds and sw around 2 ft at 14 seconds.
Sat night..NW winds 15 to 25 kt with gusts up to 30 kt. Wind waves 4 to 5 ft. W swell 3 to 5 ft at 14 seconds and S around 2 ft at 17 seconds.
Sun..NW winds 5 to 15 kt. Wind waves 1 to 2 ft. W swell 3 to 5 ft and S 2 to 4 ft.
Mon..SW winds 5 to 10 kt. Wind waves 1 ft. Mixed swell W 3 to 5 ft and S 3 to 5 ft.
...san francisco bar/fourfathom bank forecast..... In the deep water channel...seas 4 to 6 ft with a dominant period of 12 seconds. Across the bar...seas 5 to 7 ft with dominant swell period of 12 seconds. Maximum ebb current of 3.0 kt at 05:19 pm Thursday and 2.0 kt at 05:43 am Friday.
Rest of today..NW winds 5 to 15 kt. Wind waves 1 to 2 ft. W swell 2 to 3 ft at 16 seconds and sw around 2 ft at 16 seconds. Hazy and areas of smoke.
Tonight..NW winds 10 to 20 kt. Wind waves 1 to 2 ft. W swell 4 to 6 ft at 16 seconds and sw around 2 ft at 15 seconds. Hazy and areas of smoke.
Fri..NW winds 10 to 20 kt with gusts up to 25 kt. Wind waves 2 to 3 ft. W swell 4 to 6 ft at 14 seconds and sw around 2 ft at 15 seconds. Hazy and areas of smoke.
Fri night..NW winds 10 to 20 kt with gusts up to 25 kt. Wind waves 3 to 4 ft. W swell 3 to 5 ft at 13 seconds and sw around 2 ft at 15 seconds. Hazy and areas of smoke.
Sat..NW winds 10 to 20 kt with gusts up to 25 kt. Wind waves 3 to 4 ft. W swell 2 to 4 ft at 14 seconds and sw around 2 ft at 14 seconds.
Sat night..NW winds 15 to 25 kt with gusts up to 30 kt. Wind waves 4 to 5 ft. W swell 3 to 5 ft at 14 seconds and S around 2 ft at 17 seconds.
Sun..NW winds 5 to 15 kt. Wind waves 1 to 2 ft. W swell 3 to 5 ft and S 2 to 4 ft.
Mon..SW winds 5 to 10 kt. Wind waves 1 ft. Mixed swell W 3 to 5 ft and S 3 to 5 ft.
...san francisco bar/fourfathom bank forecast..... In the deep water channel...seas 4 to 6 ft with a dominant period of 12 seconds. Across the bar...seas 5 to 7 ft with dominant swell period of 12 seconds. Maximum ebb current of 3.0 kt at 05:19 pm Thursday and 2.0 kt at 05:43 am Friday.
PZZ500 816 Am Pdt Thu Oct 1 2020
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Light to moderate northwest winds will persist as high pressure remains over the eastern pacific. Locally breezy afternoon and evening conditions expected along the immediate coast and prominent points and headlands. The strongest winds are forecast along the big sur coast south of point sur. Mixed seas will continue with a moderate northwest swell and a longer period light southerly swell. Expect southerly swell to build from south to north at the end of the week and into the weekend as a result of hurricane marie.
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Light to moderate northwest winds will persist as high pressure remains over the eastern pacific. Locally breezy afternoon and evening conditions expected along the immediate coast and prominent points and headlands. The strongest winds are forecast along the big sur coast south of point sur. Mixed seas will continue with a moderate northwest swell and a longer period light southerly swell. Expect southerly swell to build from south to north at the end of the week and into the weekend as a result of hurricane marie.
7 Day Forecast for Marine Location Near Daly City, CA
Hourly EDIT Help
location: 37.77, -122.54 debug
Area Discussion for - San Francisco/Monterey Bay Area, CA
(on/off) Help NOTE: mouseover dotted underlined text for definitionFXUS66 KMTR 011755 AFDMTR
Area Forecast Discussion National Weather Service San Francisco Bay Area 1055 AM PDT Thu Oct 1 2020
SYNOPSIS. Very warm to hot and dry conditions will persist over the region Thursday and Friday. This will result in an increase in Heat Risks across interior locations as well as critical fire weather conditions over the higher terrain, especially where ongoing fires continue. A region-wide cooling trend is then expected for this upcoming weekend.
DISCUSSION. as of 08:45 AM PDT Thursday . Fort Ord Profiler this morning depicting a shallow marine layer that has steadily remained under 400 feet since 9 PM local time last night, while temps immediately above 600ft are still hanging around 30C. Vertical mixing of temperatures has been observed this morning, with 60s and 70s prevalent across much of the CWA by 7 AM local time. Have observed temps in the mid-to-upper 80s at some of our highest-terrain locations (>1500 ft) this morning as a result. This near-surface thermal trough will be the dominant player in today's max temps. Heat Advisory will go into effect starting at 11 AM for most of the CWA, excluding the immediate coast. The exception is the City of SF, where a temperature gradient of 20+ degrees F is likely to be observed between the Pacific shoreline (e.g. Sunset District, Lake Merced, Golden Gate Park) and the east side/higher-terrain portions of the City (e.g. The Mission, Downtown, Twin Peaks). This gradient will depend entirely on the strength of the onshore flow vs the amount of hot air that is mixed down from the thermal trough, along with diurnal heating. For now, looking like hottest locations in the City will make it up to 90F. Similarly, expecting temps all along the Bay Shoreline to get into the low 90s.
It should be noted that areas immediately above or outside the range of the shallow marine layer with weak onshore will not be spared from the heat. San Jose is expected to climb into the mid- to-upper 90s, while interior locations like Livermore and Concord will get as high as the low 100-104 F range. This phenomenon will be apparent on the Central Coast as well, where geography and expected wind directions will result in hot 90-95 F temps mixing down to the City of Santa Cruz and Watsonville, while the Monterey Coast can expect slightly more relief. In terms of what can be expected for the North Bay, still progging hot temps in the 100-104F in interior valleys and ridges, but the added caveat there will be the amount of elevated smoke overhead, which may just help to hold down temps by a few degrees from what is currently progged.
There is also elevated smoke across much of the rest of the region this morning as well, so that may bring forecasted temps down by a couple degrees in near-sea-level locations. Will be monitoring temps today closely. For updates on air quality concentrations in your area, please consult AirNow or the Bay Area Air Quality Management District.
PREV DISCUSSION. as of 3:37 AM PDT Thursday . Only notable feature on the overnight satellite imagery are the heat signatures from ongoing fires across the state. Unlike the last few nights low clouds are non-existent for the forecast area. No clouds visible, but the marine layer is still present, but it's been crushed to a few hundred feet per the Fort Ord profiler.
Near term weather impacts to the Bay Area and Central California will continue to be focused on heat, smoke and fire weather. For specific fire weather details see the fire weather section below.
No overall change regarding current Heat Advisory products currently in effect for interior locations including San Francisco and the Bay Shoreline. The large scale synoptic pattern reveals an impressive upper level ridge covering the entire West, including a northward extent into E Alaska. After a toasty day yesterday today will be a tad warmer with a few near record to record high temperatures. The lower confidence part of the forecast continues to be the zone along the immediate coastline and a few miles inland, especially a challenging spot like downtown San Francisco. Hi-res models still show a weak onshore component, which will help to keep the coast from getting really hot. Regardless, interior areas will be hot. Highs today will be well into the 90s with many far interior spots reaching into to the low 100s. Stronger northerly flow is forecast to develop later today resulting in breezy to gusty conditions, especially the higher terrain. The winds will likely result in a few hot spot areas thanks to downsloping flow. These local hot spots will be downwind/lee side of an higher terrain. Not expecting a huge amount of relief tonight as overnight lows will remain mild and in the 60s and 70s, with a few local spots staying in the low 80s. A slight nudge downward with temperatures is expected on Friday, especially near the coast/bays, but interior spots will remain in the 90s to near 100. Heat Risk concerns begin to decrease on Friday, but may need to re-evaluate and see if interior locations need one more day of a Heat Advisory. Widespread cooling is expected over the weekend and next weak as the ridge breaks down and a trough approaches from the NW.
In addition to the heat, the airmass over the region is very dry and is on track to remain dry through at least Friday. The combination of very low relative humidity, hot temperatures, and increasing winds will result in critical fire weather conditions, especially over the higher terrain. Red Flag Warnings are in effect for most of the higher terrain with the exception of interior San Benito County, where winds won't be as strong.
Despite increasing winds, smoke will continue to be a problem around the region. Smoke isn't just from fires nearby, but fires north of the Bay Area. Overnight sensors indicate poor air quality and reduced visibility to a few miles thanks to smoke. The deteriorating fire weather conditions will likely result in more smoke production from ongoing fires like exacerbating the smoke issue. For more details regarding smoke check out the Bay Area AQ District and fire.airnow.gov.
The extended part of the forecast is still looking interesting given the potential for tropical moisture and precip to NorCal. Details on specific models have changed, but the general idea is still there. Leftover tropical moisture has the potential to interact with an approaching trough late next week with precip occurring over the PacNW and possibly southward into the Bay Area.
AVIATION. as of 10:55 AM PDT Thursday . For the 18z TAFs. Concerns today will all be smoke related. ASOS are reporting cloud layers but its actually smoke. Vsby will be impacted mainly in the 3-6 sm range for smoke and haze. Winds to remain light. Slant range vsby to continue to impact SFO approach.
Vicinity of KSFO . Smoke layers to impact vsby the rest of this afternoon and evening. No clouds forecast, just smoke layers. Winds to remain light. Some low level wind shear with gusty north winds aloft.
SFO Bridge Approach . Possible slant-range vis issues with smoke and haze. Otherwise, similar to KSFO.
Monterey Bay Terminals . Only impacts will be smoke and haze with vsby 4-6sm. Winds to remain light.
CLIMATE. Here are record high temperatures for Thursday and Friday .
. THURSDAY FRIDAY SANTA ROSA . 102 in 1980 . 105 in 1980 KENTFIELD . 97 in 2012 . 100 in 2012 NAPA . 106 in 1980 . 102 in 1980 RICHMOND . 99 in 1980 . 100 in 1980 LIVERMORE . 102 in 1952 . 106 in 1980 SAN FRANCISCO . 97 in 1980 . 96 in 1980 SF AIRPORT . 97 in 1980 . 96 in 1980 REDWOOD CITY . 103 in 1980 . 104 in 1980 HALF MOON BAY . 83 in 2014 . 88 in 1995 OAKLAND DOWNTOWN . 103 in 1980 . 103 in 1980 SAN JOSE . 97 in 1980 . 96 in 2012 GILROY . 104 in 2001 . 107 in 1980 SANTA CRUZ . 102 in 1965 . 102 in 1980 SALINAS . 105 in 1980 . 103 in 1980 KING CITY . 109 in 1980 . 107 in 1980
FIRE WEATHER. as of 10:04 AM PDT Thursday . All current Red Flag Warnings will be extended through 6 am Saturday morning for all hills above 1000 feet except in San Benito county. Very hot and dry conditions regionwide with humidity values in the teens. Highs in the 90s to lower 100s today. Smoke is extensive across the region and likely to persist into Friday. Smoke layer will keep temps a few degrees cooler than if skies were clear as well as bringing some stability to the fire behavior.
Northerly winds 10 to 20 mph in the hills combined with ongoing low humidity will keep fire weather conditions critical at least the next 1-2 days.
Glass Fire: Red Flag Warning 1 pm Thursday through Saturday 6 am. Northerly winds this morning will turn more to the Northwest Thursday afternoon and evening when gusts 25-30 mph likely. These will combine with the very low humidity values under 20% with temps in the 90s to lower 100s. Winds veer back to the North overnight with continued little or no humidity recovery. No significant wx changes for Friday with Red Flag continuing as persistent hot, dry, breezy wx continues. Red Flag now extended through the overnight hours of Friday through 6 am Saturday morning. Models showing a final burst of winds Friday night while the hot/dry wx continues. Some cooling finally arrives Saturday but will need to watch for gusty seabreeze winds Saturday afternoon moving up the Napa Valley.
Dolan Fire: Red Flag Warning through 6 am Saturday. Very hot and dry conditions in the Los Padres NF with temps 90s to lower 100s. Humidity values to remain single digits and teens with essentially no night time recovery. Models continue to show 925 mb winds around 20 mph with some peak speeds to 30 mph to impact the higher ridges of the Dolan Fire. The next 2 days should offer a good wind/heat test for containment lines. Relief on Saturday will be slow as the marine layer slowly returns to the coast but looks like continued breezy and dry in the hills Saturday.
MARINE. as of 10:37 AM PDT Thursday . Light to moderate northwest winds will persist as high pressure remains over the eastern Pacific. Locally breezy afternoon and evening conditions expected along the immediate coast and prominent points and headlands. The strongest winds are forecast along the Big Sur Coast south of Point Sur. Mixed seas will continue with a moderate northwest swell and a longer period light southerly swell. Expect southerly swell to build from south to north at the end of the week and into the weekend as a result of Hurricane Marie.
MTR WATCHES/WARNINGS/ADVISORIES. Tday. Heat Advisory . CAZ006-506>508-510>513-516>518-528 Red Flag Warning . CAZ517 Red Flag Warning . CAZ507-511-512 SCA . Pt Arena to Pt Reyes 0-10 nm from 11 AM SCA . Pt Pinos to Pt Piedras Blancas 0-10 nm from 11 AM
PUBLIC FORECAST: Diaz AVIATION: RWW MARINE: RWW FIRE WEATHER: RWW
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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 San Francisco, CA
(wind in knots) EDIT (on/off) Help| 11 AM | 12 PM | 1 PM | 2 PM | 3 PM | 4 PM | 5 PM | 6 PM | 7 PM | 8 PM | 9 PM | 10 PM | -12 PM | 12 AM | 1 AM | 2 AM | 3 AM | 4 AM | 5 AM | 6 AM | 7 AM | 8 AM | 9 AM | 10 AM | |
| Last 24hr | NE | W | SW | SW G17 | SW G15 | SW G9 | SW G10 | NW G5 | S | S | S | S | SW | -- | SW | NW | S | NW | SE | SE | SE | SE | E | |
| 1 day ago | SW G11 | SW G13 | SW G11 | W G13 | SW G14 | W G15 | W G20 | W G14 | SW G10 | SE G4 | W G8 | W G11 | SW G8 | W G10 | SW G6 | SW | SW G7 | SW G6 | W | S | E | E | NE | N |
| 2 days ago | NW | SW | SW G11 | SW G16 | SW G20 | SW G19 | SW G17 | SW G16 | SW G19 | SW G17 | SW G12 | SW G7 | SW G15 | SW G11 | W G8 | SW G7 | W | SW | SW G10 | S G6 | SW G7 | SW G7 | W G9 | W G8 |
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 |
| San Francisco, San Francisco International Airport, CA | 14 mi | 34 min | ENE 5 | 8.00 mi | Mostly Cloudy | 73°F | 61°F | 66% | 1015.7 hPa |
| Oakland, Metro Oakland International Airport, CA | 18 mi | 37 min | W 3 | 5.00 mi | Smoke Haze | 77°F | 57°F | 52% | 1016 hPa |
| Half Moon Bay Airport, CA | 18 mi | 2.9 hrs | no data | 3.00 mi | Fair with Haze | 57°F | 53°F | 88% | 1015.9 hPa |
| San Carlos Airport, CA | 23 mi | 42 min | Var 3 | 4.00 mi | Smoke Haze | 75°F | 62°F | 65% | 1016.3 hPa |
| Hayward, Hayward Air Terminal, CA | 24 mi | 36 min | S 3 | 4.00 mi | A Few Clouds with Haze | 80°F | 50°F | 35% | 1016.7 hPa |
Link to 5 minute data for KSFO
Wind History from SFO (wind in knots)
| 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 | 8 AM | 9 AM | 10 AM | 11 AM | |
| Last 24hr | N | Calm | N | NW | NW | NW | NW | NW | W | W | NW | Calm | W | W | W | Calm | Calm | Calm | Calm | Calm | Calm | Calm | NE | |
| 1 day ago | NW | NW | NW | NW | NW | NW | NW | NW | NW | NW | NW | W | NW | W | NW | NW | NW | NW | NW | NW | Calm | SE | E | NE |
| 2 days ago | SE | E | Calm | W | NW | NW | NW | NW | NW | NW | NW | W | W | NW | W | W | NW | W | NW | NW | NW | NW | NW | N |
Tide / Current Tables for Ocean Beach, California
EDIT Weekend mode (on/off) (on/off) Help One Week of DataOcean Beach
Click for Map
Thu -- 05:02 AM PDT 0.63 feet Low Tide
Thu -- 06:47 AM PDT Moonset
Thu -- 07:06 AM PDT Sunrise
Thu -- 11:37 AM PDT 5.36 feet High Tide
Thu -- 02:06 PM PDT Full Moon
Thu -- 05:27 PM PDT 1.06 feet Low Tide
Thu -- 06:52 PM PDT Sunset
Thu -- 07:15 PM PDT Moonrise
Thu -- 11:38 PM PDT 5.14 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Click for Map
Thu -- 05:02 AM PDT 0.63 feet Low Tide
Thu -- 06:47 AM PDT Moonset
Thu -- 07:06 AM PDT Sunrise
Thu -- 11:37 AM PDT 5.36 feet High Tide
Thu -- 02:06 PM PDT Full Moon
Thu -- 05:27 PM PDT 1.06 feet Low Tide
Thu -- 06:52 PM PDT Sunset
Thu -- 07:15 PM PDT Moonrise
Thu -- 11:38 PM PDT 5.14 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 |
| 5 | 4.2 | 3 | 1.8 | 1 | 0.6 | 0.9 | 1.6 | 2.6 | 3.7 | 4.7 | 5.3 | 5.3 | 4.8 | 3.8 | 2.7 | 1.7 | 1.1 | 1.1 | 1.7 | 2.6 | 3.6 | 4.5 | 5 |
Tide / Current Tables for South Channel, San Francisco Bay Approach, California Current
EDIT (on/off) Help One Week of DataSouth Channel
Click for Map
Thu -- 12:32 AM PDT -0.01 knots Slack
Thu -- 03:19 AM PDT -1.48 knots Max Ebb
Thu -- 06:42 AM PDT 0.01 knots Slack
Thu -- 06:47 AM PDT Moonset
Thu -- 07:06 AM PDT Sunrise
Thu -- 09:39 AM PDT 1.32 knots Max Flood
Thu -- 12:59 PM PDT -0.00 knots Slack
Thu -- 02:06 PM PDT Full Moon
Thu -- 03:38 PM PDT -1.39 knots Max Ebb
Thu -- 06:52 PM PDT Sunset
Thu -- 06:57 PM PDT 0.01 knots Slack
Thu -- 07:15 PM PDT Moonrise
Thu -- 09:53 PM PDT 1.28 knots Max Flood
Tide / Current data from XTide NOT FOR NAVIGATION
Click for Map
Thu -- 12:32 AM PDT -0.01 knots Slack
Thu -- 03:19 AM PDT -1.48 knots Max Ebb
Thu -- 06:42 AM PDT 0.01 knots Slack
Thu -- 06:47 AM PDT Moonset
Thu -- 07:06 AM PDT Sunrise
Thu -- 09:39 AM PDT 1.32 knots Max Flood
Thu -- 12:59 PM PDT -0.00 knots Slack
Thu -- 02:06 PM PDT Full Moon
Thu -- 03:38 PM PDT -1.39 knots Max Ebb
Thu -- 06:52 PM PDT Sunset
Thu -- 06:57 PM PDT 0.01 knots Slack
Thu -- 07:15 PM PDT Moonrise
Thu -- 09:53 PM PDT 1.28 knots Max Flood
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 |
| 0.4 | -0.4 | -1.1 | -1.5 | -1.4 | -1.1 | -0.5 | 0.2 | 0.9 | 1.2 | 1.3 | 1.1 | 0.7 | -0 | -0.8 | -1.3 | -1.4 | -1.1 | -0.7 | 0 | 0.7 | 1.2 | 1.3 | 1.1 |
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 San Francisco Bay Area, CA
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