Marine Weather and Tides
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 7:05AM||Sunset 5:14PM||Sunday January 21, 2018 10:06 AM PST (18:06 UTC)||Moonrise 10:51AM||Moonset 10:42PM||Illumination 25%|
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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 211256|
area forecast discussion
national weather service san joaquin valley - hanford ca
456 am pst Sun jan 21 2018
Weak high pressure over the region will maintain dry and
seasonably cool conditions today. A weak weather system will then
bring a chance of light precipitation to areas from fresno county
north tonight and Monday. A stronger storm system will bring rain
and mountain snow to much of the area Wednesday night through
Cooler air in place behind the recent passing frontal system is
providing a frosty morning across our area, with temperatures
running in the low to mid 30s across the san joaquin valley.
Some low clouds are banked along the valley facing slopes in
tulare and kern counties, otherwise mostly clear skies prevail. Mid
level moisture streaming into the weak ridge building overhead
will create some additional cloudiness over the area while
temperatures rise to around climo this afternoon.
The next weak frontal system to impact central california will
brush by late Sunday night into Monday, as models continue to
trend the main shortwave energy well to our north. Precipitation
chances should remain generally from fresno county north, with
only light QPF and minimal snow accumulation over the sierra.
Tuesday will see weak ridging again as a more significant
developing trough approaches the region. Under the weak ridge we
will see slight warming with a chance for some fog in the san
joaquin valley. This next pacific frontal system is handled
similarly by models and will spread precipitation chances
southward across our area by Wednesday evening and overnight.
Though this storm system will have more of an impact on our area|
than the weak system brushing by Monday, there are still
uncertainties, as QPF progs are trending lower. Current storm
total rainfall accumulations for the sj valley are expected to
range from as much as 1 2 inch up near the merced area to around a
couple of tenths down south. Amounts increase to 3 4 of an inch to
around an inch up into the foothills and sierra zones below the
snow level which will be as low as 3500 ft. Several inches of snow
will accumulate in the sierra, with locally up to a foot at the
highest elevations. More modest rain and snow amounts are likely
in the kern county mountains, though low snow levels and upslope
shower activity could lead to travel concerns over the passes
by Thursday morning. Most desert locations are expected to see
less than a few hundredths of an inch of rainfall. Gusty winds
will also accompany the passing frontal system.
Models remain in general agreement for the end of the week and the
weekend as a ridge is progged to build along the west coast. This
will bring dry and generally warming temperatures, except
conditions will be favorable for another round of san joaquin
valley tule fog. Persistent fog and low clouds would keep valley
temperatures from warming much during the day.
In the san joaquin valley, areas of MVFR and local ifr conditions in
mist and low clouds through 18z Sunday. Otherwise,VFR conditions
will prevail across the central ca interior 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||32 min||W 5||10.00 mi||Fair||32°F||0°F||26%||1024 hPa|
Wind History from MMH (wind in knots)
|1 day ago||NW||W||W|
|2 days ago||N||S|
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Weather Map and Satellite Images(on/off)  Help
|Weather Map ||IR Satellite Image from GEOS|
GOES Local Image of CentralWestCoast EDIT
Wind Forecast for San Joaquin Valley/Hanford, CA (13,3,4,5)(on/off)  Help
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