Marine Weather and Tides
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 6:16AM||Sunset 7:38PM||Saturday April 20, 2019 10:09 AM PDT (17:09 UTC)||Moonrise 9:15PM||Moonset 7:21AM||Illumination 99%|
7 Day Forecast for Marine Location Near Mammoth Lakes, CAHourly EDIT Help
Area Discussion for - San Joaquin Valley/Hanford, CA  (on/off)  Help NOTE: mouseover dotted underlined text for definition
|Fxus66 khnx 201148|
area forecast discussion
national weather service san joaquin valley - hanford ca
448 am pdt Sat apr 20 2019
A low pressure system will drop into the central california
interior from the northwest today. This will bring a chance of
mainly mountain showers through tonight, with the possibility
of sierra thunderstorms this afternoon. Low pressure aloft will
then set up over the great basin on Sunday and Monday for an
offshore flow and warming temperatures.
A weak upper level low is moving east away from kern county as an
upper trough begins to swing inland along the northwest coast.
Satellite imagery shows increasing mid and high clouds beginning
to encroach on our northern areas while radar indicates spotty
showers over northern ca, associated with the incoming trough.
Models prog the trough to push through central ca today and
despite limited accompanying moisture there will be a chance for
showers, mainly over the mountain zones. As the cooler air aloft
moves overhead and instability increases, isolated thunderstorms
can not be ruled out over the sierra nevada later this afternoon,
mainly north of tulare county. Expect increasing gusty
west northwest winds with the passing trough, especially through
and below mountain passes. With many locations expected to
experience gusts around 50 mph in the kern county mountains and
desert areas, a wind advisory is in effect there this afternoon
The incoming trough will also knock off around 10 to 15 degrees
from yesterday's unseasonably warm high temps. MAX t's today will
be within a couple of degrees of climo. The trough is forecast to
close of an upper low near the great basin area by tonight, which
will drift slowly toward southern nevada Sunday and Sunday night.
We could see a few lingering sierra showers Sunday on the edge of|
this low pressure area. Expect continued seasonable temperatures
Sunday under the troughy pattern.
Monday through midweek will be dry as high pressure builds behind
the exiting trough. The transition between the departing low and
the building ridge will bring a gusty northeasterly flow on
Monday. Temperatures will rebound significantly under the building
ridge. By Wednesday and Thursday, highs will reach as much as 15
to 20 degrees above climo.
The ridge will weaken by the end of next week, although models
are not in agreement with the details of the evolving pattern.
Expect a slight decrease in temperatures but still above normal
for the end of next week. As we experience the well above normal
temperatures during the upcoming week, snow melt will increase and
rivers and streams will become more dangerous with fast flowing
very cold water.
For the southern sierra nevada from yosemite south to the tulare
county mountains: expect ifr conditions,mountain obscurations, and
precipitation with isolated thunderstorms from noon through about 8
pm pdt today. For the kern county mountains and desert: expect west
to northwesterly wind gusts of 55 mph becoming likely from 3 pm pdt
today until about 1 am pdt Sunday. Additionally, ifr conditions and
mountain obscurations expected today in the kern county mountains
from noon until about midnight. Otherwise,VFR conditions will
prevail at mce, mer, fat, vis, and bfl for the next 24 hours.
Air quality issues
The level of certainty for days 1 and 2 is high.
The level of certainty for days 3 through 7 is medium.
Certainty levels include low... Medium... And high. Please visit
Weather Reporting StationsEDIT (on/off)  Help NOTE: Click on distance to see the station location on a map
Airport ReportsEDIT (on/off)  Help Click EDIT to display multiple airports
|Mammoth Yosemite Airport, CA||9 mi||14 min||W 7||10.00 mi||Fair||53°F||25°F||35%||1015.6 hPa|
Wind History from MMH (wind in knots)
|1 day ago||Calm||S||S||S||SE||SE||SE||SE||S||Calm||W||W||W||Calm||NW||Calm||N||N||N||Calm||NW||NW||Calm||Calm|
|2 days ago||N||Calm||N||N||W||W|
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Weather Map and Satellite Images(on/off)  HelpWeather Map
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.
Link to Loop
Other links: Northern Pacific Contential US Full GOES-East
Wind Forecast for San Joaquin Valley/Hanford, CA (13,3,4,5)(on/off)  Help
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