Monday, September25, 2017 L-36.com


Marine Weather and Tides
Loyola, CA

Version 3.4
What's New / NOTES
6/25/2017 - NOAA is having a major issue that impact the 7 day forecast load times. Many users are reporting problems. The issue has been reported.
5/23/2017 - Worked with NOAA again to speed up the 7 day forecast load times. Thanks to them for being responsive.
5/19/2016 - There were issues with the 3 day airport observation history. I switched to another data source. Let me know if you see any issues with the data feeds.

Sunrise 6:58AMSunset 7:00PM Monday September 25, 2017 10:10 AM PDT (17:10 UTC) Moonrise 11:09AMMoonset 9:40PM Illumination 25% Phase: Waxing Crescent; Moon at 5 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
PZZ560 Pigeon Point To Point Pinos To 10 Nm- 832 Am Pdt Mon Sep 25 2017
Today..N winds 5 kt...becoming nw 5 to 15 kt in the afternoon. Waves 1 to 3 ft. NW swell 3 to 4 ft at 9 seconds.
Tonight..NW winds 5 to 15 kt. Wind waves 1 to 3 ft. NW swell 3 to 5 ft at 9 seconds.
Tue..NW winds 10 kt. Wind waves 2 ft or less. NW swell 4 to 6 ft at 9 seconds.
Tue night..E winds 10 kt. Wind waves 2 ft or less. NW swell 3 to 5 ft at 9 seconds.
Wed..S winds 5 kt. Wind waves 2 ft or less. NW swell 3 to 4 ft at 9 seconds.
Thu..NW winds 10 kt. Wind waves 2 ft or less. NW swell 3 to 4 ft.
Fri..NW winds 5 to 15 kt. Wind waves 1 to 3 ft. NW swell 3 ft.
PZZ500 832 Am Pdt Mon Sep 25 2017
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Moderate northwesterly winds will continue over the northern outer waters as high pressure sits over the eastern pacific and a thermal trough resides over california. Winds will begin to decrease on Tuesday as the trough shifts towards the coast.

7 Day Forecast for Marine Location Near Loyola, CA
   Hourly   EDIT   Help
location: 37.29, -122.14     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
      (on/off)   Help   NOTE: mouseover dotted underlined text for definition
Fxus66 kmtr 251536
afdmtr
area forecast discussion
national weather service san francisco bay area
836 am pdt Mon sep 25 2017

Synopsis Warm offshore pattern will continue at least through
Wednesday with mild nights and breezy winds in the hills. Some
coastal cooling possible by Thursday with a gradual cooling trend
back to more seasonable temperatures by next weekend but with a
continued dry weather pattern.

Discussion As of 08:35 am pdt Monday... Mainly clear skies
prevail over the region again this morning as high pressure builds
over the eastern pacific. With warming conditions aloft, surface
temperatures are generally running a few degrees warmer compared
to 24 hours ago along with slightly lower relative humidity
values. This is setting the stage for the warming trend to
continue today with most areas a few to as much as 8 degrees
warmer than yesterday. With this said, the ongoing forecast for
today remains on track and no updates are needed at this time.

Please see the previous forecast discussion below for additional
details.

Prev discussion As of 3:37 am pdt Monday... Classic september
offshore weather pattern is forecast for much of the upcoming work
week. Synoptic pattern features northerly wind flow aloft with a
thermal trough at the surface over coastal california while the
center of the surface high remains well offshore. Current surface
gradients include 4 mb northerly down the coast with about 6 mb
offshore from the nevada deserts towards the coast. This is
occurring with mostly clear skies to start the day. Winds in the
hills are generally light this morning with lows from the mid 50s
to mid 60s on average, mildest where the winds are strongest.

Humidity values remain under 30 percent for many of the hill
locations so red flag warnings will continue for the north and
east bay hills through at least Wednesday.

Expect warm to locally hot weather today through Wednesday under
offshore wind regime. However, low dewpoints will keep heat
indices and impacts to a minimum along with longer early fall
nights allowing for night time cooling, even for buildings without
ac. To be clear the magnitude and overall set-up of this heat
event is not nearly as extreme as what was observed at the start
of sept.

For tonight, the models are showing another burst of gusty
northeast east winds, strongest over the napa and east bay hills.

Further drying of the airmass will persist right through Tuesday.

The combination of hot day time temps, dry offshore winds and
prolonged periods of low humidity values has prompted the red
flag warning to run through weds. No appreciable rain has fallen
and fuels remain critically dry so use extra precaution with any
ignitions sources including nigh-time warming fires.

By weds we'll lose some of the offshore adiabatic warming but no
strong onshore return is forecast so will likely squeeze another
warm to hot today, even near the coast. By Thursday the ridge will
finally weaken and allow for some cooling but temperatures to
remain on the warm side of normal through late week and likely
into the weekend as well with no rain in sight.

Aviation As of 4:30 am pdt Monday... Upper level ridge off the
california coast extends into the pacific northwest. Offshore
winds at 925 mb keeping the area clear of stratus. A shortwave
riding over the top of the ridge will bring in some cirrus clouds
from the north.

Vicinity of ksfo...VFR. West winds to 15 kt after 22z.

Sfo bridge approach... Similar to ksfo.

Monterey bay terminals...VFR.

Fire weather As of 3:37 am pdt Monday... Red flag warnings in
effect through weds afternoon for the north and east bay hills.

Temps will warm up and rh values dry out again today. Expect
stronger offshore winds in the hills tonight with continued
lowering of humidity into Tuesday. Models show another burst of
gusty northeast winds in the north and east bay hills Tuesday
night into early weds. Winds will finally ease by weds afternoon
but by then the fuels will be very dry with low humidity and
likely the hottest day of the week with widespread readings into
the upper 80s and 90s. We are near the peak of bay area fire
season and this is a classic critical fire weather pattern.

Marine As of 08:35 am pdt Monday... Moderate northwesterly winds
will continue over the northern outer waters as high pressure sits
over the eastern pacific and a thermal trough resides over
california. Winds will begin to decrease on Tuesday as the trough
shifts towards the coast.

Mtr watches warnings advisories
Tday Sca... Pt arena to pigeon pt 10-60 nm
public forecast: rgass
aviation: W pi
marine: as
fire weather: rww
visit us at

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
RTYC1 - 9414523 - Redwood City, CA 15 mi40 min ESE 1 G 1.9 66°F 67°F1014.1 hPa
AAMC1 - 9414750 - Alameda, CA 34 mi40 min SSE 2.9 G 4.1 64°F 66°F1014.9 hPa
LNDC1 36 mi52 min SSE 1.9 G 4.1 65°F 1014.5 hPa
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 37 mi40 min SSE 2.9 G 4.1
OBXC1 37 mi40 min 64°F 53°F
OKXC1 - 9414776 - Oakland (Berth 34), CA 37 mi40 min SSE 2.9 G 4.1 66°F 1014.4 hPa
46042 - MONTEREY - 27NM West of Monterey Bay, CA 37 mi80 min N 5.8 G 7.8 60°F 62°F5 ft1014.1 hPa (+0.8)
PXOC1 - 9414311 - San Francisco (Pier 1), CA 38 mi40 min ESE 7 G 8 62°F 1013.3 hPa
46092 - MBM1 38 mi65 min NNE 9.7 59°F 60°F1014 hPa (+0.7)
PXSC1 38 mi40 min 64°F 57°F
ELXC1 - Elkhorn Slough Reserve, CA 39 mi85 min Calm 58°F 1013 hPa45°F
FTPC1 - 9414290 - San Francisco, CA 40 mi40 min NNE 1.9 G 2.9 62°F 62°F1014.7 hPa
46012 - HALF MOON BAY - 24NM South Southwest of San Francisco, CA 40 mi80 min N 5.8 G 7.8 60°F 62°F6 ft1013.9 hPa (+0.7)
46114 - West Monterey Bay, CA 41 mi40 min 62°F6 ft
46237 - San Francisco Bar, CA (142) 43 mi40 min 60°F3 ft
PPXC1 - 9414847 - Richmond (Point Potrero), CA 44 mi40 min SE 1 G 1.9 68°F 1014.9 hPa
RCMC1 - 9414863 - Richmond, CA 46 mi40 min SSE 1.9 G 2.9 64°F 64°F1014.4 hPa
46240 - Cabrillo Point, Monterey Bay, CA (158) 48 mi49 min 62°F2 ft
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 49 mi80 min E 3.9 G 3.9 59°F 58°F5 ft1014.2 hPa (+0.7)
MEYC1 49 mi40 min WNW 5.1 G 6 61°F 63°F1014 hPa

Wind History for Redwood City, 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
E3
W1
SW2
NW6
NW5
N6
NW7
NW12
W12
G15
W10
W7
G10
NW5
NW2
SE3
--
SW3
--
W4
SW3
SE2
NE1
S1
SE1
--
1 day
ago
NW1
W4
NW4
G9
NW12
G17
NW11
G15
NW13
W16
W15
W13
W11
G14
W4
NW4
W4
SE4
SE2
E1
W4
S2
SW2
E2
S2
--
S2
E1
2 days
ago
NE3
NE3
N4
G8
N7
G11
N8
G13
W8
G12
W12
SW15
W11
G14
W6
G9
NW8
W5
W4
S4
S1
S2
--
E2
--
--
S2
S2
SE1
E1

Airport Reports
    EDIT      (on/off)   Help   Click EDIT to display multiple airports
AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Mountain View, Moffett Field, CA11 mi74 minSW 310.00 miFair63°F45°F52%1015.1 hPa
San Jose, San Jose International Airport, CA12 mi17 minN 010.00 miPartly Cloudy69°F39°F33%1014.3 hPa
Palo Alto Airport, CA13 mi23 minVar 410.00 miA Few Clouds61°F51°F72%1014.6 hPa
San Jose / Reid / Hillv, CA17 mi83 minN 010.00 miA Few Clouds64°F41°F43%1015.6 hPa
San Carlos Airport, CA18 mi23 minN 010.00 miA Few Clouds66°F53°F64%1014.6 hPa
Half Moon Bay Airport, CA24 mi15 minW 59.00 miFair68°F0°F%1013.2 hPa

Wind History from NUQ (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 24hr3NW5W4NW6N9NW7
G15
N10NW11NW9NW7N5N5CalmCalmSE3CalmCalmCalmCalmCalmCalmCalmCalmSW3
1 day ago3NW5N7N7NW9
G16
W7
G15
NW10NW12NW9NW8N7N5CalmSE4CalmCalmCalmCalmCalmCalmCalmCalmCalmCalm
2 days ago3E5N8N7N10N12N14NW10N11N5NW8NW6CalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalm

Tide / Current Tables for Palo Alto Yacht Harbor, California
   EDIT   RT Ports Option   Weekend mode (on/off)   (on/off)   Help   One Week of Data
Palo Alto Yacht Harbor
Click for Map
Mon -- 05:00 AM PDT     6.81 feet High Tide
Mon -- 06:59 AM PDT     Sunrise
Mon -- 12:00 PM PDT     2.79 feet Low Tide
Mon -- 12:09 PM PDT     Moonrise
Mon -- 05:01 PM PDT     7.91 feet High Tide
Mon -- 07:00 PM PDT     Sunset
Mon -- 10:39 PM PDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
11.83.35.16.46.86.55.854.43.73.12.83.24.467.47.97.56.353.82.71.8

Tide / Current Tables for Dumbarton Point 2.3 mi NE, South San Francisco Bay, California Current
   EDIT      (on/off)   Help   One Week of Data
Dumbarton Point 2.3 mi NE
Click for Map
Mon -- 02:10 AM PDT     1.13 knots Max Flood
Mon -- 05:33 AM PDT     -0.00 knots Slack
Mon -- 06:58 AM PDT     Sunrise
Mon -- 09:20 AM PDT     -0.70 knots Max Ebb
Mon -- 11:38 AM PDT     0.00 knots Slack
Mon -- 12:08 PM PDT     Moonrise
Mon -- 02:06 PM PDT     0.83 knots Max Flood
Mon -- 05:02 PM PDT     -0.00 knots Slack
Mon -- 06:59 PM PDT     Sunset
Mon -- 09:37 PM PDT     -1.06 knots Max Ebb
Mon -- 10:39 PM PDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.30.91.110.80.3-0.1-0.4-0.6-0.7-0.6-0.20.20.60.80.70.40-0.3-0.6-0.9-1-1-0.7

Weather Map and Satellite Images
       (on/off)   Help
Weather Map
wmap_P
IR Satellite Image from GEOS
west_satellite

GOES Local Image of CentralWestCoast    EDIT
Geos

Wind Forecast for San Francisco/Monterey Bay Area, CA (13,3,4,5)
      (on/off)   Help

Ground Weather Radar Station San Francisco Bay Area, CA
   (on/off)   Help
weather_mapweather_map weather_map

Ad by Google

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 numerious 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.