Thursday, December13, 2018 L-36.com


Marine Weather and Tides
Hollister, CA

Version 3.4
What's New / NOTES
10/6/2018 Colors of tide XTide graphs changed to emphasize that they were upgraded. See next note. Comments welcome.
10/4/2018 I have fixed XTide and updated the harmonic files. There were some name changes so you might have to click EDIT to find the new station name.

Sunrise 7:09AMSunset 4:51PM Thursday December 13, 2018 3:17 PM PST (23:17 UTC) Moonrise 11:43AMMoonset 10:46PM 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
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PZZ535 Monterey Bay- 231 Pm Pst Thu Dec 13 2018
Tonight..E winds 10 kt. Wind waves 2 ft or less. W swell 7 to 8 ft at 16 seconds.
Fri..S winds 15 to 25 kt. Wind waves 3 to 5 ft. W swell 6 to 7 ft at 15 seconds. Chance of rain in the afternoon.
Fri night..S winds 5 to 15 kt...becoming east after midnight. Wind waves 2 ft or less. W swell 6 to 8 ft at 15 seconds. Chance of showers in the evening, then slight chance of showers after midnight.
Sat..SE winds 10 kt. Wind waves 2 ft or less. W swell 7 to 9 ft at 14 seconds. Slight chance of showers in the morning.
Sat night..SE winds 10 kt. Wind waves 2 ft or less. W swell 6 to 8 ft at 14 seconds.
Sun..S winds 15 to 25 kt. Wind waves 3 to 5 ft. W swell 5 to 7 ft...increasing to 11 to 14 ft. Chance of rain, then rain.
Mon..NW winds 5 kt. Wind waves 2 ft or less. W swell 13 to 16 ft. Chance of showers.
Tue..N winds 10 kt. Wind waves 2 ft or less. W swell 9 to 11 ft.
PZZ500 231 Pm Pst Thu Dec 13 2018
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Increasing southerly winds will develop tonight and into tomorrow ahead of an arriving frontal boundary. In addition, a moderate northwest swell will generate steep fresh swell through tomorrow, bringing locally hazardous seas to small craft vessels. A very large, long period northwest swell arrive late this weekend through early next week.


7 Day Forecast for Marine Location Near Hollister, CA
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location: 36.85, -121.43     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
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Fxus66 kmtr 132237
afdmtr
area forecast discussion
national weather service san francisco bay area
237 pm pst Thu dec 13 2018

Synopsis Dry conditions are forecast to continue across our
region through Thursday night with mild temperatures. A weak
weather system will produce light rain later Friday and Friday
night, especially for areas north of the golden gate. Scattered
showers may continue into Saturday, mainly for the north bay. A
stronger and wetter system is then expected to produce widespread
rain across our entire region Sunday afternoon and Sunday night. A
return to dry weather is expected late Monday through early
Thursday as an upper level ridge builds into the area.

Discussion As of 02:06 pm pst Thursday... Upper level ridge
keeping the area dry and mild today. Temperatures so far have
warmed into the upper 50s to mid 60s making for a nice day across
the area. Expect temperatures to MAX out from the lower to upper
60s areawide, with a couple 70 degree readings possible in the
southern half of the cwa. High clouds will start to overspread the
area tonight ahead of an upper level trough approaching the west
coast. These high clouds will help to keep lows several degrees
warmer than last night.

The trough will push the upper ridge to the east tonight and the
trough axis will be located just offshore by midday Friday, but
will be weakening as it progresses east. Increasing moist
southwest flow will allow some light prefrontal showers to form
over the higher terrain Friday morning and afternoon. A cold front
with a decent moisture tap ahead of it will move into the north
bay during the afternoon and push south into the bay area by early
Friday evening. Ahead of this front, southerly winds could become
breezy at times. Showers will accompany the front as it moves
south, but rainfall is expected to be light. The front will stall
as it reaches the sf bay and will weaken overnight, and showers
will decrease in coverage Friday evening. The remnants of the
front are depicted by models to move back over the north bay on
Saturday, and scattered showers will persist near this boundary.

Rainfall amounts Friday through Saturday will be light to
locally moderate, with 0.5 to 1 inch in the north bay mountains,
0.25 to 0.5 inch in the north bay valleys, 0.1-0.25 across the bay
area, and less than 0.1 inches in the populated areas of the
central coast.

A stronger trough will then move through the area on Sunday and
Sunday night. Models have come into better agreement about the
nature of the trough, with both the GFS and euro mostly keeping
the trough together as it moves through and then splitting it as
it moves east from the area. The trough will feature an area of
high pwat ahead of the cold front with values between 1.1 to 1.25"
overhead by Sunday afternoon. The front will also be accompanied
by a decent cold front which will hold together as it moves
through the area. Given the high pwat, strong vorticity advection,
and cold front, this system will be prime to produce much more
widespread and potentially heavier rainfall than the system on
Friday. Light rain will develop in the north bay on Sunday morning as
moist onshore flow increases and will become heavier during the
afternoon as the trough and front approach. Moderate to locally
heavy rain will spread south during the late afternoon and
evening across the area, reaching the sf bay by late afternoon and
the monterey bay by mid to late evening. Rainfall amounts with
this system will be more substantial, with 0.5 to 1 inch in most
populated areas, with 1 to 1.5 inches in the north bay valleys and
coastal mountains and 1.5 to 2.5 inches in the north bay
mountains. South winds with this system could once again be breezy
ahead of the front, especially near the coast and in the higher
terrain.

The band of rainfall will be over the central coast early Monday
morning, with showers decreasing elsewhere. The band will move to
our east by Monday afternoon, leaving only isolated showers in
its wake. Models have come into better agreement about a ridge
building to our southwest on Tuesday. The ridge will likely build
to a high enough amplitude to push all rainfall to our north, with
only a slight chance of showers in sonoma county. Dry weather will
then continue into at least early Thursday. Models try to bring a
system into the area late next week, but differ on details.

Aviation As of 9:40 am pst Thursday... Ridge apex over central
california resulting in widespreadVFR with generally light
offshore winds and passing high clouds to the north this morning.

Arriving frontal boundary will bring increasing cloud cover from
north to south through the TAF period, with a shift towards wetter
showery pre frontal weather towards the end of the TAF period for
the northern 30-hour TAF sites.

Vicinity of ksfo...VFR today. Increasing clouds through the taf
period with prefrontal showers possible mid to late Friday
morning.

Sfo bridge approach... Similar to ksfo.

Monterey bay terminals...VFR. Breezy upvalley (se) winds in the
salinas valley thru this morning. Increasing clouds towards end of
taf period ahead of next frontal boundary.

Marine As of 02:33 pm pst Thursday... Increasing southerly winds
will develop tonight and into tomorrow ahead of an arriving
frontal boundary. In addition, a moderate northwest swell will
generate steep fresh swell through tomorrow, bringing locally
hazardous seas to small craft vessels. A very large, long period
northwest swell arrive late this weekend through early next week.

Beaches A potent storm system passing south of aleutian islands
will move nearly due east over the coming days. This eastward
trajectory will create a dynamic fetch zone where the strongest
winds of the storm system will continuously increase the energy
within a swell train on the southern flank of the storm, resulting
in a very large, long period wnw wave train aimed at the
california coast. Very long period forerunners will arrive through
the day Sunday and will bring a significantly increased risk of
rip currents and sneakers waves to the coast. The largest waves
are then forecast to arrive Sunday night through Monday morning,
with peak swells of 17 to 21 ft at 19 to 21 seconds currently
expected. Large breaking waves of 25 to 40 ft will be possible at
west and northwest facing locations, with breakers up to or
exceeding 50 ft at favored break points along the coast.

Mtr watches warnings advisories
Tngt Sca... Pt arena to pt reyes 0-10 nm
sca... Pt reyes to pigeon pt 0-10 nm
sca... Pigeon pt to pt pinos 0-10 nm
sca... Pt pinos to pt piedras blancas 0-10 nm
sca... Pt arena to pigeon pt 10-60 nm
sca... Pigeon pt to pt piedras blancas 10-60 nm
sca... Rough bar advisory for sf bar
public forecast: st
aviation: drp
marine: drp
beaches: drp
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Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
ELXC1 - Elkhorn Slough Reserve, CA 17 mi93 min ENE 5.1 67°F 1021 hPa43°F
MLSC1 - Moss Landing, South Harbor, CA 19 mi28 min SE 4.1 G 11 67°F 1020.9 hPa43°F
MEYC1 30 mi42 min 59°F1020.6 hPa
46240 - Cabrillo Point, Monterey Bay, CA (158) 30 mi48 min 58°F5 ft
46092 - MBM1 32 mi74 min NNE 9.7 60°F 59°F1020.6 hPa (-3.1)

Wind History for Monterey, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Hollister, CA, CA3 mi23 minN 1010.00 miFair64°F44°F49%1021 hPa
Salinas, Salinas Municipal Airport, CA16 mi25 minE 510.00 miFair66°F44°F45%1021.3 hPa
Watsonville, Watsonville Municipal Airport, CA20 mi25 minE 510.00 miFair69°F36°F30%1020.5 hPa

Wind History from CVH (wind in knots)
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Last 24hrNW8NE6N8N4CalmCalmNE6E4NE6E3CalmE4CalmCalmCalmCalmCalmSE4CalmCalmCalmNE4
G11
N9N10
1 day agoW3NW3CalmE4CalmCalmCalmCalmCalmCalmCalmCalmCalmCalmSE3CalmCalmCalmCalmNW4NW7NW8NW7NW6
2 days agoNW4N7NW10N4N6NE4NE4E3CalmCalmE3CalmE3CalmNE4CalmNE5NE5NE5CalmCalmCalmNW5
G10
Calm

Tide / Current Tables for Elkhorn, California (2)
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Elkhorn
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Thu -- 03:43 AM PST     4.20 feet High Tide
Thu -- 07:11 AM PST     Sunrise
Thu -- 09:07 AM PST     3.06 feet Low Tide
Thu -- 11:44 AM PST     Moonrise
Thu -- 02:07 PM PST     4.03 feet High Tide
Thu -- 04:51 PM PST     Sunset
Thu -- 08:59 PM PST     0.53 feet Low Tide
Thu -- 10:47 PM PST     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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2.33.13.74.14.243.73.43.23.13.13.33.63.943.93.52.821.20.70.50.71.2

Tide / Current Tables for Elkhorn, California
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Elkhorn
Click for Map
Thu -- 03:50 AM PST     3.89 feet High Tide
Thu -- 07:11 AM PST     Sunrise
Thu -- 08:16 AM PST     3.00 feet Low Tide
Thu -- 11:44 AM PST     Moonrise
Thu -- 01:36 PM PST     4.09 feet High Tide
Thu -- 04:51 PM PST     Sunset
Thu -- 09:03 PM PST     0.35 feet Low Tide
Thu -- 10:47 PM PST     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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2.12.93.53.83.93.73.53.233.13.33.63.94.14.13.93.52.821.20.60.40.51

Weather Map and Satellite Images
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GOES 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.
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Wind Forecast for San Francisco/Monterey Bay Area, CA (18,4,5,8)
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Ground Weather Radar Station San Francisco Bay Area, CA
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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.