Tuesday, January19, 2021
Privacy Policy
L-36.com

Marine Weather and Tides
Greenfield, 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 7:12AMSunset 5:19PM Tuesday January 19, 2021 9:50 AM PST (17:50 UTC) Moonrise 11:15AMMoonset 12:00AM Illumination 38% Phase: Waxing Crescent; Moon at 6 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
    EDIT      (on/off)   Help
PZZ565 Coastal Waters From Point Pinos To Point Piedras Blancas California Out To 10 Nm- 817 Am Pst Tue Jan 19 2021
.small craft advisory in effect until 3 pm pst this afternoon...
Today..NE winds 15 to 25 kt with gusts up to 40 kt, becoming N 10 to 20 kt with gusts up to 30 kt this afternoon. Wind waves 8 to 9 ft, decreasing to 3 to 4 ft this afternoon. W swell 6 to 8 ft at 16 seconds.
Tonight..N winds 10 to 20 kt with gusts up to 25 kt. Wind waves 4 to 5 ft. W swell 3 to 5 ft at 15 seconds.
Wed..N winds 5 to 15 kt. Wind waves 2 to 3 ft. W swell 2 to 4 ft at 14 seconds.
Wed night..N winds 5 to 15 kt. Wind waves 3 to 4 ft. W swell 2 to 4 ft at 14 seconds.
Thu..NW winds 5 to 15 kt. Wind waves 2 to 3 ft. W swell 4 to 5 ft at 15 seconds.
Thu night..NW winds around 10 kt. Wind waves 2 to 3 ft. NW swell 4 to 6 ft at 14 seconds.
Fri..NW winds 5 to 15 kt. Wind waves 1 to 2 ft. NW swell 8 to 10 ft. A chance of showers.
Sat..N winds 5 to 15 kt. Wind waves 1 to 2 ft. NW swell 6 to 8 ft.
PZZ500 817 Am Pst Tue Jan 19 2021
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Gale force gusts over much of the coastal waters and the san francisco bay will continue into this afternoon before winds gradually diminish. Locally breezy winds will persist this afternoon and evening resulting in hazardous seas conditions for smaller vessels. Lighter winds mid-week before a wet weather system arrives at the end of the week and northwest winds increase. Moderate northwest swell will prevail through much of the period.


7 Day Forecast for Marine Location Near Greenfield, CA
   Hourly   EDIT   Help
location: 36.13, -121.64     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
      (on/off)   Help   NOTE: mouseover dotted underlined text for definition
FXUS66 KMTR 191737 AFDMTR

Area Forecast Discussion National Weather Service San Francisco Bay Area 937 AM PST Tue Jan 19 2021

SYNOPSIS. Gusty offshore winds will continue through midday then slowly subside this afternoon through sunset. High pressure builds Wednesday and Thursday with dry and tranquil weather. A cooling trend by Friday as a trough approaches with a chance of some light rain showers. Drying trend for Saturday with another cold front forecast to arrive later Sunday into early Monday with a better chance of rain. Long range pattern looks cool and wet next week.

DISCUSSION. as of 9:37 AM PST Tuesday . Strong wind event peaked overnight but still seeing gusty winds across the region. Latest obs still showing gusts in excess of 64 mph for the Oakland North wx station at 1400 feet in the East Bay hills with gusts in excess of 50 mph across the North Bay hills. High Wind Warning for the hills currently goes through 10 am. Plan will be to transition that Warning to a Wind Advisory to match the rest of the region that will keep the Wind Advisory in effect through 6 pm this afternoon. Impacts reported have been numerous throughout the region with trees, limbs and powerlines down. Its impacted our radar here with the comms lines down as strong winds pummeled the Santa Cruz mountains. Several small fires have been reported from the North Bay, through the Bay Area and into the Santa Cruz mountains. The 2020 burn areas across Monterey county have put up dust and ash plumes that are visible across the Central Coast and showing up on GOES17 satellite.

The traditional SFO-WMC gradient peaked around 15 mb and is currently around 14 mb. Those values are moderately strong but the upper support and cold advection were ideal for strong sinking air and momentum transfer as the main upper low is now cutting off over SoCal.

Moving forward as winds ease tonight we expect quiet weather to return Weds and Thursday as the upper low wobbles over SoCal and high pressure tries to nose over the Bay Area and Central Coast.

This wind event, though dry has signaled the beginning of an overall pattern change. By Friday a cold upper level shortwave will take aim for NorCal. Much cooler temps will be the main impact along with some scattered rain showers forecast Friday for the Bay Area. Rain amounts look light and spotty at this time. Any rain showers will end early Saturday but expect cool and blustery weather for the weekend.

A second stronger and wetter front is forecast to arrive late Sunday into early Monday. Will start to focus on the long range forecasts over the coming days but all signals suggest a cooler and wetter pattern to wind out the month.

PREV DISCUSSION. as of 03:13 AM PST Tuesday . Strong, damaging winds continue to impact the region this morning with numerous reports of downed trees and limbs, scattered power outages and property damage. Wind gusts of 40 to 60 mph have been reported across portions of the Bay Area with gusts of 75 to 95 mph in the Mayacamas Mountains. Reports in excess of 70 mph have also been reported in the higher peaks of the Diablo Range and Santa Cruz Mountains as well as just above Highway 1 along the Big Sur Coast. Surface pressure gradient from WMC to SFO approached 14 mb around 09Z and may tighten a bit more before sunrise. Additionally, the local WRF and HRRR maintain 925mb winds of 45 to 55 kt over portions of the region through 15Z before diminishing by midday. Thus, will extend the High Wind Warning (for higher elevations about 1,000 feet) until 10 AM PST. Breezy to locally gusty winds will then remain possible over portions of the region through the afternoon as the air mass aloft begins to stabilize. Thus, the Wind Advisory will remain in effect even though winds will gradually diminish region-wide into the afternoon.

Colder air aloft will continue to advect over the region today as the mid/upper level low currently centered over southern Nevada shifts to the southwest and then off of the southern California coast. This will allow for afternoon temperatures to be 10 to 15 deg F cooler compared to yesterday, yet still above seasonal averages due to the dry, offshore flow. The combination of unseasonably dry fuels, strong winds and low humidity will continue to produce critical fire weather conditions over the mountains of Monterey and San Benito Counties where a Red Flag Warning remains in effect through this afternoon. While dry conditions and strong winds are impacting the remainder of the Bay Area as well, that region has seen more rainfall (albeit well below climatological normal) and thus has less of a threat for rapidly spreading wildfires. For more details, see the Fire Weather Discussion below.

Temperatures will remain above seasonal averages into Wednesday as light offshore flow persists. Onshore flow returns on Thursday resulting in a slight cooling trend that will become more robust by Friday as the upper level ridge over the Pacific retrogrades to the west. Cooler, unsettled weather conditions are expected as early as Friday as a mid/upper level low drops southward along the West Coast. Isolated to scattered rain showers will be possible over the region from Friday into Saturday as this colder system lacks sufficient moisture. Subsequent systems, potentially with a better moisture tap, will bring additional chances of precipitation across the region into early next week. Stay tuned as our focus turns to a more unsettled weather pattern late in the week.

AVIATION. as of 4:17 AM PST Tuesday . For the 12Z TAFs. Strong to very strong offshore winds, lee side mountain waves are evident on satellite imagery over most of the cwa and strong low level wind shear is occurring this morning. A strengthening upper level low is moving southwestward from Nevada and will reach Point Conception later this morning. Additionally, surface pressure gradients are strong WMC-SFO is 12.6 mb, ACV-SFO is 8.7 mb, UKI-STS is 2.1 mb. Once the low passes by to our south and southwest, winds will ease from north to south over the cwa by late morning and through the afternoon and evening. Widespread downsloping air is thoroughly dried out, VFR is forecast. Though blowing dust may temporarily lower surface visibilities to MVFR through morning.

Residual gusty north to northeast lower level winds over the North Bay early tonight may result in a brief period of low level wind shear as conditions will then favor surface wind decoupling.

Vicinity of KSFO . Airport Weather Warning for winds valid through 17z today. Low level wind shear with northeast winds 50-60 knots as low as 1,500 feet agl through 17z. North to northeast winds easing later today and tonight. VFR.

SFO Bridge Approach . Similar to KSFO.

Monterey Bay Terminals . Low level wind shear with northeast winds 35-45 knots through 18z-19z today. North to northeast winds easing later today and tonight. VFR.

FIRE WEATHER. as of 03:13 AM PST Tuesday . A very dry air mass continues to advect over the region this morning with humidity values in the teens across much of the Central Coast. Additionally, strong gusty winds will prevail through the morning before diminishing later this afternoon. These weather conditions combined with unseasonably dry fuels will result in critical fire weather conditions through early this afternoon. Thus, the Red Flag Warning will remain in effect through 3 PM PST for the mountains of Monterey and San Benito Counties. While heightened fire weather conditions will persist over the remainder of the region through this afternoon, early season rains and some "green up" will limit a widespread fire weather threat. Conditions improve region wide Tuesday night into Wednesday as winds diminish and onshore flow returns late in the week.

MARINE. as of 09:05 AM PST Tuesday . Gale force gusts over much of the coastal waters and the San Francisco Bay will continue into this afternoon before winds gradually diminish. Locally breezy winds will persist this afternoon and evening resulting in hazardous seas conditions for smaller vessels. Lighter winds mid- week before a wet weather system arrives at the end of the week and northwest winds increase. Moderate northwest swell will prevail through much of the period.

MTR WATCHES/WARNINGS/ADVISORIES. Tday. Red Flag Warning . CAZ517-518 Wind Advisory . CAZ006-505-506-508>510-513-518-528>530 SCA . Mry Bay 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 GLW . Pt Arena to Pt Reyes 0-10 nm until 2 PM GLW . Pt Reyes to Pigeon Pt 0-10 nm until 2 PM GLW . Pigeon Pt to Pt Piedras Blancas 10-60 nm until 2 PM GLW . Pt Arena to Pigeon Pt 10-60 nm until 12 PM GLW . SF Bay until 3 PM



PUBLIC FORECAST: RWW AVIATION: AS MARINE: AS FIRE WEATHER: RGass

Visit us at www.weather.gov/sanfrancisco

Follow us on Facebook, Twitter, and YouTube at: www.facebook.com/nwsbayarea www.twitter.com/nwsbayarea www.youtube.com/nwsbayarea


Weather Reporting Stations
   EDIT       (on/off)   Help   NOTE: Click on distance to see the station location on a map
Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
46028 - CAPE SAN MARTIN - 55NM West Northwest of Morro Bay, CA 28 mi40 min N 21 G 27 58°F 38°F
46239 - Point Sur, CA (157) 28 mi54 min 54°F12 ft
MEYC1 35 mi74 min NE 17 G 21 57°F 1009.8 hPa
46240 - Cabrillo Point, Monterey Bay, CA (158) 37 mi54 min 53°F5 ft
MLSC1 - Moss Landing, South Harbor, CA 47 mi50 min 53°F
46092 - MBM1 48 mi53 min N 16 56°F 53°F1009.3 hPa (+2.4)
ELXC1 - Elkhorn Slough Reserve, CA 48 mi65 min WNW 4.1 58°F 1009 hPa15°F

Wind History for Monterey, CA
(wind in knots)    EDIT      (on/off)   Help
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
8
AM
9
AM
Last
24hr
NE8
NE12
NE7
N3
NW9
NW9
S3
G9
NW4
S3
S4
S3
S3
S2
S3
SW4
NW11
G15
N21
N15
G20
N14
G19
N14
G17
NE12
NE13
G16
NE11
G15
NE13
G17
1 day
ago
NE12
NE9
NE13
NE11
NW7
NW11
G14
--
NW7
G11
S3
W3
SW2
S2
SW3
S2
N1
SW3
NW10
G13
N1
S3
S5
S2
S5
SE4
E10
G13
2 days
ago
N9
NW8
N6
N10
NW11
NW7
NW10
NW2
G6
W6
G11
SE3
SE4
S2
NW6
S5
S1
N4
S2
S1
N3
S4
SW1
S5
E5
N5

Airport Reports
    EDIT      (on/off)   Help   Click EDIT to display multiple airports. Follow links for more data.
AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Monterey Regional Airport, CA34 mi56 minN 010.00 miFair58°F12°F16%1011.7 hPa

Link to 5 minute data for KMRY

Wind History from MRY (wind in knots)
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
8
AM
9
AM
Last 24hrE6E12E8E9NW5NW5N6N3SE4SE8E4SE5SE5SE3SE65NE7NE6633NE7
G15
E7Calm
1 day agoNE6NE7NE7E7NE5W5W3W4CalmCalmE5CalmCalmSE5CalmCalm5SW5CalmE6E5SE7E6E8
2 days agoCalmW3NW4N4N6N4N3CalmCalmCalmSE4SE65SE8CalmCalmCalmCalmW3SE7E3SE11E8Calm

Tide / Current Tables for Carmel Cove, Carmel Bay, California
   EDIT   Weekend mode (on/off)   (on/off)   Help   One Week of Data
Carmel Cove
Click for Map
Tue -- 03:17 AM PST     4.03 feet High Tide
Tue -- 07:17 AM PST     Sunrise
Tue -- 09:21 AM PST     2.25 feet Low Tide
Tue -- 11:15 AM PST     Moonrise
Tue -- 02:29 PM PST     3.30 feet High Tide
Tue -- 05:20 PM PST     Sunset
Tue -- 08:57 PM PST     1.31 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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
2.63.33.8443.73.22.82.42.32.32.52.83.13.33.33.12.72.21.81.41.31.41.8

Tide / Current Tables for Monterey, Monterey Harbor, California (2)
   EDIT      (on/off)   Help   One Week of Data
Monterey
Click for Map
Tue -- 03:26 AM PST     4.49 feet High Tide
Tue -- 07:17 AM PST     Sunrise
Tue -- 09:39 AM PST     2.18 feet Low Tide
Tue -- 11:15 AM PST     Moonrise
Tue -- 02:56 PM PST     3.53 feet High Tide
Tue -- 05:19 PM PST     Sunset
Tue -- 09:07 PM PST     1.42 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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
2.73.54.14.54.44.13.632.52.22.22.42.73.13.43.53.432.521.61.41.51.9

Weather Map
       (on/off)   Help Weather Map
wmap_P
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




Cookie Policy:
This website uses cookies to save your settings. No personal information is saved. I do not collect statistics on your visit. You can disable cookies in your browser if you like but it is not recommended for this site. I do not sell cookies. Go to a bakery for that. In fact I do not sell anything. To disable cookies from L-36.com, please refer to the Help button in your browser.
Privacy Policy:
I do not sell or share any user data or anything else for that matter. The only personal information I save is in the site log which has a line for each page view which includes the IP address your browser sends in the header as well as which page you requested. I use this to block hackers and other bad actors. I do not use this raw data to create profiles on users. I periodically delete the log files. Google supplies the ads on this site. Because I do not track who you are, I cannot customize how these ads are served. They may be personalized to improve the ad experience. If you do not want personalized ads, please adjust the settings on the Google site HERE. NOTE: The best I can determine, this site is not subject to CCPA but I am doing my best to comply anyway.
Disclaimer:
The information on this web site has not been checked for accuracy. It is for entertainment purposes only and should be independently verified before using for any other reason. There are five sources. 1) Documents and manuals from a variety of sources. These have not been checked for accuracy and in many cases have not even been read by anyone associated with L-36.com. I have no idea of they are useful or accurate, I leave that to the reader. 2) Articles others have written and submitted. If you have questions on these, please contact the author. 3) Articles that represent my personal opinions. These are intended to promote thought and for entertainment. These are not intended to be fact, they are my opinions. 4) Small programs that generate result presented on a web page. Like any computer program, these may and in some cases do have errors. Almost all of these also make simplifying assumptions so they are not totally accurate even if there are no errors. Please verify all results. 5) Weather information is from numerous of sources and is presented automatically. It is not checked for accuracy either by anyone at L-36.com or by the source which is typically the US Government. See the NOAA web site for their disclaimer. Finally, tide and current data on this site is from 2007 and 2008 data bases, which may contain even older data. Changes in harbors due to building or dredging change tides and currents and for that reason many of the locations presented are no longer supported by newer data bases. For example, there is very little tidal current data in newer data bases so current data is likely wrong to some extent. This data is NOT FOR NAVIGATION. See the XTide disclaimer for details. In addition, tide and current are influenced by storms, river flow, and other factors beyond the ability of any predictive program.