Tuesday, November21, 2017 L-36.com


Marine Weather and Tides
Simi Valley, 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 6:33AMSunset 4:48PM Tuesday November 21, 2017 4:00 AM PST (12:00 UTC) Moonrise 10:10AMMoonset 8:34PM Illumination 8% Phase: Waxing Crescent; Moon at 3 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
PZZ655 Inner Waters From Point Mugu To San Mateo Pt. Ca Including Santa Catalina And Anacapa Islands- 221 Am Pst Tue Nov 21 2017
Today..Winds variable 10 kt or less, becoming W 10 kt in the afternoon. Wind waves 2 ft or less. W swell 2 ft at 12 seconds.
Tonight..W winds 10 kt in the evening, becoming variable 10 kt or less. Wind waves 2 ft or less. W swell 2 ft at 11 seconds.
Wed..Winds variable 10 kt or less, becoming W 10 kt in the afternoon. Wind waves 2 ft or less. W swell 2 ft at 11 seconds.
Wed night..NW winds 10 kt in the evening, becoming variable 10 kt or less. Wind waves 2 ft or less. W swell 2 ft at 10 seconds.
Thu..Winds variable 10 kt or less, becoming W 10 kt in the afternoon. Wind waves 2 ft or less. W swell 2 ft at 14 seconds.
Thu night..NW winds 5 to 10 kt. Wind waves 2 ft or less. W swell 2 ft at 15 seconds.
Fri..Winds variable 10 kt or less, becoming sw 10 kt in the afternoon. Wind waves 2 ft or less. W swell 2 to 3 ft.
Sat..SW winds 5 to 10 kt. Wind waves 2 ft or less. W swell 2 to 3 ft.
PZZ600 221 Am Pst Tue Nov 21 2017
Synopsis for the southern california coast and santa barbara channel including the channel islands national marine sanctuary and national park..At 09z...or 1 am pst...a 990 mb low was located 650 nm W of eureka ca and a 1024 mb high was over the four corners area.

7 Day Forecast for Marine Location Near Simi Valley, CA
   Hourly   EDIT   Help
location: 34.27, -118.8     debug


Area Discussion for - Los Angeles/Oxnard, CA
      (on/off)   Help   NOTE: mouseover dotted underlined text for definition
Fxus66 klox 210622
afdlox
area forecast discussion
national weather service los angeles oxnard ca
1022 pm pst Mon nov 20 2017

Synopsis
Temperatures will warm significantly this week and will likely
break records across the region Tuesday through Thursday. It is
possible that downtown los angeles could have the hottest
thanksgiving since 1903. Temperatures will then cool ten degrees
or more by Sunday.

Short term (mon-thu)
no updates expected to the forecast this evening. Overall,high
temps increased quite a bit across the central coast today,
generally 5 to 8 degrees from yesterday as weak offshore flow from
the san lucia mtns made it to the central coast. Most of slo
interior valleys warmed up as well around 5 degrees from Sunday.

With the upper ridge building in today, the la county mtns and
antelope valley also saw double digit warming. However, with gusty
nw winds across the outer waters, an eddy developed across the
socal bight and la vtu county coast and coastal valleys which
actually cooled temps as much as 3-5 degrees today. Things will
be much different tomorrow as most coast and coastal valleys will
see significant warming as a relatively weak santa ana develops.

The combination of a strong ridge building aloft with offshore
flow will bring widespread warming to all areas.

As for this evening... Will be keeping an eye on the northerly
winds that are occurring across the la vtu county mountains this
evening as well as the santa barbara south coast and adjacent
santa ynez mountains. The latest lax-bfl surface gradient which
helps to identify northerly winds was around -4.2mb. As of now,
strongest northerly wind gusts were localized to around 45 mph
through the i-5 corridor and only around 30 mph across the hills
above montecito. Not expecting to reach wind advisory level
widespread gusts, but there should be some local gusts near it
through this evening into early Tue morning. Expect the northerly
winds to spread south into the santa clarita and the western
portion of the san fernando valley and santa monica mountains as
well late this evening into the early Tue morning. Again, should
remain below wind advisory thresholds. By Tue morning, northerly
winds are expected to shift to the northeast (offshore flow) as a
weak offshore gradient will set up between NRN nevada and off the
socal coast allowing for the weak santa ana as mentioned above.

Not expecting any frost or freeze issues late tonight into tue
morning as well.

As mentioned in the earlier discussion... An unseasonably strong
591 dm upper level ridge building in from the south will only
strengthen to around a 594-595 dm around baja so cal border. The
upper ridge will amplify some sending most of the clouds well to
the north after tomorrow. For now we will be under a dirty ridge
with periods of high clouds moving across the forecast area. There
is the potential for some record heat as early as tomorrow for a
few areas like woodland hills, lancaster, sandberg and paso
robles, with more widespread record breaking heat expected on
Wednesday and thanksgiving day. Check out the last paragraph in
the "from from previous discussion" to get more details about the
record heat potential for thanksgiving.

***from previous discussion***
generally flat and dirty upper level ridging over the forecast area
this afternoon, with 500 mb heights around 582-584 dm, will
gradually build tonight thru wed. By Wed afternoon, 500 mb heights
will increase to 590-592 dm across the region. The upper ridge will
continue Wed night and weaken slightly thanksgiving day, with 500
mb heights lowering to 587 to 590 dm.

The mid and hi level moisture over the region will linger into
tonight then clear out by early Tue for sunny days and clear
nights Tue thru thanksgiving day.

Northerly gradients will increase some thru tonight which will
support gusty N canyon winds for the sba county S coast and mtns,
with local gusts to advisory levels possible. Gusty NW winds can
also be expected in the l.A. Vtu mtns along the i-5 corridor this
evening, then transition to N to NE and expand S into the favored
foothills and vlys of vtu l.A. Counties later tonight into tue
morning. Locally gusty NE winds will be possible over these areas of
vtu l.A. Counties again Tue night into Wed morning. Otherwise, there
will generally be weak offshore low level flow over swrn ca tonight
thru wed, especially during the night and morning hours. Weak
offshore flow will persist Wed night into thanksgiving day,
especially over vtu l.A. Counties.

The rising 500 mb heights, warming boundary layer and 950 mb temps,
and offshore flow, will all help to bring much warmer than normal
temps to the forecast area Tue thru thanksgiving day. Near record to
record high temps will be possible for several climate stations
during the period. Temps should be warmest on Wed as highs should be
generally 15 to 20 deg above normal for many areas. Temps in the
warmest vlys and inland coastal areas should reach the mid 80s to
low 90s on tue, low to mid 90s on wed, and upper 80s to low 90s on
thanksgiving day. Even overnight temps should be very mild in the
breezy foothill and lower mtns Tue night and Wed night where lows in
the low to mid 70s will be possible.

Incidentally, the highest temperature ever recorded at downtown los
angeles on thanksgiving day (on which the date varies from year to
year) was 90 degrees on november 26th, 1903. This record has the
potential to be tied or broken this upcoming thanksgiving day as the
forecast high is 90 degrees, but there is the possibility of temps
reaching 91 or even 92 degrees. (however, the actual record high for
november 23rd is 91 degrees set in 1933, so the daily record may not
be set.) the rest of the top 5 warmest thanksgiving days at downtown
l.A. Include 89 degrees on nov 27, 2014; 88 degrees on nov 24, 1977;
and 87 degrees on both nov 23, 1939 and nov 24, 1932. Records for
downtown los angeles go back to 1877.

Long term (fri-mon)
the ec and GFS are in generally good agreement over the E pac into
the western u.S. Fri thru mon, altho by Mon the GFS has a stronger
upper trof over the W coast than the ec. Went with a general blend
of the two models with the most uncertainty in the forecast for mon.

The upper high will be slightly weaker but persist over SRN ca for
fri, then gradually weaken and move E of the area Sat thru sun. A
broad upper level trof is forecast to move into the E pac to the w
coast for mon, along with a surface cold front. The front should
remain N of slo county Sun night and mon, altho the ec does bring in
some light rain to that area by afternoon. Went with ghost pops for
sun night into Mon over slo county (less than 15 percent). Some
increasing cloud cover ahead of the upper trof should begin as soon
as Sun then continue into mon, especially for northern areas.

Temps are forecast to be significantly above normal on fri, then
gradually cool but remain several degrees above normal for many
areas for Sat and sun, then highs will fall to near normal to
slightly above normal for mon. Highs in the warmest vlys and inland
coastal areas should be in the mid 80s to near 90 on fri, low to mid
80s on sat, upper 70s to around 80 on sun, and generally in the 70s
on mon.

Aviation 21 0015z.

At 2330z, around klax, there was a marine layer around 400 feet
deep with an inversion top of 2100 feet at 22 degrees celsius.

High confidence in 00z tafs over next 24 hours. Not anticipating
any stratus.

Klax... High confidence in 00z taf.

Kbur... High confidence in 00z taf.

Marine 20 10 pm.

For the outer waters, moderate confidence in current forecast. Sca
have been allowed to expire, but there could be local gusts to 25
kt through midnight for zones 673 and 676. Winds will stay below
sca speeds Tuesday and Wednesday except zone 676 has a 50% chance
for SCA gusts late Tue afternoon into early evening. For Thursday
and Friday, SCA level winds are likely.

For the inner waters, good confidence in current forecast. For the
waters north of point sal, winds and seas are expected to remain
below SCA levels through Friday. For the waters south of point
conception, winds and seas are expected to remain below SCA levels
through Friday.

Lox watches warnings advisories
Ca... None.

Pz... None.

Hazard potential outlook (thu-mon)
hot and very dry conditions are expected Thursday, with warm and
dry conditions Wednesday night. There will be gusty winds at times
across portions of los angeles and ventura counties. There will
likely be elevated fire danger across portions of los angeles and
ventura counties during this time.

Public... Kaplan sirard
aviation... Kaplan
marine... Kaplan
synopsis... Kj
weather.Gov losangeles


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
ICAC1 - 9410840 - Santa Monica Pier 24 mi49 min ENE 2.9 G 4.1 62°F 61°F1016.9 hPa
46221 - Santa Monica Bay, CA (028) 30 mi31 min 64°F2 ft
46217 - Anacapa Passage, CA (111) 34 mi31 min 61°F2 ft
46025 - Santa Monica Basin - 33NM West Southwest of Santa Monica, CA 38 mi31 min E 3.9 G 5.8 64°F1015.8 hPa
46262 41 mi31 min 65°F2 ft
PSXC1 46 mi43 min ENE 1 G 1
BAXC1 46 mi43 min Calm G 0
PFDC1 47 mi43 min NW 1.9 G 2.9
OHBC1 - 9410660 - Los Angeles, CA 47 mi43 min 62°F1016.7 hPa
NTBC1 - Santa Barbara, CA - 9411340 48 mi85 min N 2.9 G 2.9 65°F 1016.5 hPa
PFXC1 48 mi43 min N 1.9 G 1.9 62°F
AGXC1 48 mi43 min N 1 G 1.9 61°F 1016.7 hPa
PRJC1 49 mi43 min W 1 G 1.9

Wind History for Santa Monica, CA
(wind in knots)    EDIT      (on/off)   Help
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
12
AM
1
AM
2
AM
3
AM
Last
24hr
E4
E2
G5
NW3
NE2
NE3
E7
S5
SW4
W5
W3
SW3
SE2
SE2
SW3
--
SE2
NW5
W3
N2
E4
NE3
E3
N2
NE2
1 day
ago
N8
NE3
NE3
NE8
NE5
NE3
NW5
W7
NW2
NW3
W7
W3
W5
NW3
SE3
E2
SE3
NE5
NE4
NE9
NE5
E3
NE3
G6
E1
2 days
ago
N1
NE4
NE5
N1
W1
W4
W7
W8
W10
W9
W11
W15
NW4
G7
W4
SE4
NW1
G4
E7
NE5
NE3
G6
N3
NE3
NE3
N5

Airport Reports
    EDIT      (on/off)   Help   Click EDIT to display multiple airports
AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Camarillo, Camarillo Airport, CA16 mi66 minN 010.00 miFair56°F46°F72%1017.2 hPa
Van Nuys, Van Nuys Airport, CA17 mi70 minN 010.00 miFair60°F37°F44%1016.3 hPa
Point Mugu, Naval Air Warfare Center, CA20 mi65 minSSW 510.00 miFair57°F48°F72%1016.7 hPa
Oxnard, Oxnard Airport, CA22 mi70 minSSE 610.00 miFair58°F44°F60%1016.3 hPa
Burbank - Bob Hope Airport, CA24 mi68 minN 010.00 miFair60°F36°F41%1015.7 hPa

Wind History from CMA (wind in knots)
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
12
AM
1
AM
2
AM
3
AM
Last 24hrSW3W5NE3NE6NE7NE7CalmSW7W7SW4SW5SW5SW4CalmCalmCalmCalmNE3NE3NE3CalmCalmCalmCalm
1 day agoCalmNW9NE3CalmNW4NE6E7NW7NW5W13W8W8W9S3SW3SE3NE4CalmE6NE4NW3CalmW3E4
2 days agoCalmE3CalmCalmN3CalmE16
G22
E12E12NE14W9W9W4CalmCalmCalmW5W8NW8NW3NE6N4N4NW6

Tide / Current Tables for Mugu Lagoon (ocean pier), California
   EDIT   RT Ports Option   Weekend mode (on/off)   (on/off)   Help   One Week of Data
Mugu Lagoon (ocean pier)
Click for Map
Tue -- 03:44 AM PST     2.37 feet Low Tide
Tue -- 06:35 AM PST     Sunrise
Tue -- 09:10 AM PST     Moonrise
Tue -- 09:49 AM PST     5.33 feet High Tide
Tue -- 04:49 PM PST     Sunset
Tue -- 05:20 PM PST     0.10 feet Low Tide
Tue -- 07:36 PM PST     Moonset
Tue -- 11:56 PM PST     3.42 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
3.53.12.72.42.42.63.23.94.75.25.354.33.42.21.20.50.10.20.71.42.22.93.3

Tide / Current Tables for Port Hueneme, California
   EDIT      (on/off)   Help   One Week of Data
Port Hueneme
Click for Map
Tue -- 03:46 AM PST     2.47 feet Low Tide
Tue -- 06:35 AM PST     Sunrise
Tue -- 09:11 AM PST     Moonrise
Tue -- 09:56 AM PST     5.45 feet High Tide
Tue -- 04:49 PM PST     Sunset
Tue -- 05:22 PM PST     0.11 feet Low Tide
Tue -- 07:36 PM PST     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
3.53.22.82.62.52.73.344.75.35.55.24.53.52.41.30.50.10.20.61.42.22.93.3

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

GOES Local Image of Southwest    EDIT
Geos

Wind Forecast for Los Angeles/Oxnard, CA (7,2,3,4)
      (on/off)   Help

Ground Weather Radar Station Los Angeles, 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.