Marine Weather and Tides
3/3/2018 - There is a new GOES Satellite for the east coast that required rewriting that part of the code. Please report any issues.
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.
|Sunrise 6:09AM||Sunset 7:43PM||Tuesday April 24, 2018 5:19 AM PDT (12:19 UTC)||Moonrise 2:16PM||Moonset 3:19AM||Illumination 67%|
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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 241035|
area forecast discussion
national weather service san joaquin valley - hanford ca
335 am pdt Tue apr 24 2018
Above normal temperatures and dry conditions will continue for the
next few days as high pressure dominates. There will be slight
chances for afternoon showers and thunderstorms for the higher
elevations of the sierra nevada by Wednesday and will continue
into the weekend as a low pressure system moves into northern
california. The main system impacts will be increased winds and
clouds for all other areas as the system moves through the region.
Discussion Above average temperatures and dry conditions will
continue through at least Wednesday in much of the region,
courtesy of the high pressure ridge that remains in control.
Daytime highs will continue to rise to around 10-15 degrees above
average. Besides warm temperatures, the primary weather concern
for the next couple of days, includes isolated thunderstorms and
cumulus cloud buildups in some locales along the sierra nevada
crest, due to the warm airmass in place.
Short-term higher resolution guidance shows a closed upper-level
low over the pacific approaching northern california during
Thursday. The flow is expected to become more onshore by that time.
The ridge of high pressure will begin to shift further inland
over the western u.S. Thus, temperatures will lower slightly, but
remain above average in many locations. However, a few locations,
such as merced county and areas along the west side of the san
joaquin valley, could begin to notice some cooling as marine air
flows over the passes. This upper low will gradually move eastward
towards the northern california coast by Friday. As this feature
approaches, an uptick in shower isolated thunderstorm activity is
in store each day, especially over the higher elevations.
Temperatures will lower noticeably by Friday in most locations due|
to more synoptic cooling associated with the upper-level low
approaching the coast. Winds will likely increase in most
locations in the central california interior. Locally gusty winds
are possible in the kern county mountains and desert and along the
west side of the san joaquin valley by Friday. During Friday and
beyond, the euro model shows this closed low becoming cut off and
lingering over northern california. However, the GFS is more
progressive with this feature and keeps the best dynamics and
precipitation to the north of our forecast area. So, quite a bit
of uncertainty remains in terms of timing and where this low will
The period that includes the weekend into early next week could
remain cool and unsettled over the sierra with locally gusty winds
at times elsewhere. At least a slight chance for showers and
afternoon evening isolated thunderstorms will continue over the
higher terrain, including the sierra nevada and foothills,
including Saturday and into next Tuesday. Due to the uncertainty
in model guidance in this period, we opted to keep the threat for
precipitation activity confined to mainly the sierra, where it is
climatologically favored. More certainty regarding the cooler
temperatures remains. So, at this time, it appears the next
calendar month (may) will begin relatively cool with possible
showers and thunderstorms over the sierra.
Vfr conditions will prevail across the central ca interior during
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
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Airport ReportsEDIT (on/off)  Help Click EDIT to display multiple airports
|Mammoth Yosemite Airport, CA||9 mi||45 min||W 10||10.00 mi||Fair||39°F||23°F||55%||1024 hPa|
Wind History from MMH (wind in knots)
|1 day ago||Calm||NW||Calm||Calm||SE||SE||SE||SW|
|2 days ago||Calm||W||Calm||Calm||SE||Calm||E||S||SE||SE||E|
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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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Other links: Northern Pacific Contential US Full GOES-East
Wind Forecast for San Joaquin Valley/Hanford, CA (8,2,3,4)(on/off)  Help
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