Thursday, April26, 2018

Marine Weather and Tides
San Luis, AZ

Version 3.4
What's New / NOTES
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 5:58AMSunset 7:16PM Wednesday April 25, 2018 11:01 PM PDT (06:01 UTC) Moonrise 3:10PMMoonset 3:33AM Illumination 83% Phase: Waxing Gibbous; Moon at 11 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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7 Day Forecast for Marine Location Near San Luis, AZ
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location: 31.65, -114.58     debug

Area Discussion for - Phoenix, AZ
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Fxus65 kpsr 260350
area forecast discussion
national weather service phoenix az
850 pm mst Wed apr 25 2018

Very warm and dry conditions will last into the coming weekend
with periods of high clouds. Lower desert high temperatures will
reach the middle to upper 90s each day, or roughly 10 degrees
above normal. Some modest cooling is possible this weekend, but
above normal temperatures should still persist. A slight chance
for showers will exist across southern gila county Friday and
Saturday afternoon as a weak storm system moves across the area.

An upper level high pressure ridge has settled in over the desert
southwest, ahead of a large upper low now developing off the
california coast. Latest 00z plot data showed 500mb heights around
584-585dm over southern arizona. Under generally sunny skies, highs
today climbed into the upper 90s over the warmer lower deserts;
phoenix topped out at 99 degrees, just 3 degrees below the record of
102. At 8 pm, IR imagery did show a bit of high clouds spreading
into the ridge and across far SE california and southwest arizona.

Little change in the pattern is expected for the rest of tonight; we
can expect partly cloudy to mostly clear skies, light winds and warm
overnight low temps. Current forecasts look to be in good shape and
no updates are needed at this time.

Previous discussion
Current analysis shows ridging over our region with
a pacific trough off the west coast. The aforementioned ridge
will continue to strengthen through Thursday, with highs
approaching 100 degrees across lower desert locations. Normal
highs this time of year are in the upper 80s, so this places
forecast values around 10 degrees above normal.

Friday morning, a backdoor cold front will push into our region
around 12z, stalling out near eastern maricopa county. This will
allow moisture to spread into eastern arizona from the east and
southeast, with increased thunderstorm chances across southern
gila county. Due to the large temperature dewpoint spread below
the cloud bases, strong downdrafts and dry lightning will be the
main impacts.

By Friday night, the pacific trough will slowly move onshore over
northern california and oregon. This will cause 500mb heights
across our region to fall from around 580dm to 576-578dm, but any
real noticeable cooling will wait until this weekend.

Rain chances for gila county will last through Saturday as the
the moisture remains in place. By Saturday afternoon, divergence
aloft will increase ahead of the pacific trough giving slightly
better chances of showers and thunderstorms to gila county, but
dry air will quickly overtake the state from the west by Saturday

The trough is forecast to slowly drift into the great basin and
northern portions of the desert southwest Saturday into Sunday.

This will aid in further cooling as highs by Sunday drop down to
near normals. Higher model spread is seen going into next week,
but the general consensus shows a shortwave trough diving down the
backside of the large scale trough, possibly reaching as far
south as the desert southwest. Though forecast confidence is
somewhat low, it seems fairly likely temperatures will drop into
the 80s for a few days next week. Rain chances with any potential
trough still look fairly low due to no significant increases in
moisture, so chances will likely be confined to high terrain

South-central arizona including kphx, kiwa, and ksdl:
high pressure aloft and weak gradients will result in winds
following typical diurnal tendencies for the next 24 hours at speeds
mostly below 10kt. There will be some high clouds at times with few-
sct decks above 20k feet and by Thursday morning expect some CIGS as
well but much of the bkn decks will be on the thin side. No aviation
concerns at any of the terminals for the next 24 hours.

Southeast california southwest arizona including kipl and kblh:
no aviation weather concerns are anticipated through Thursday
evening. Light diurnal winds with mostly clear skies are
anticipated. Winds to favor the west at kipl and the south to
southwest at kblh.

Aviation discussion not updated for amended tafs.

Fire weather
Saturday through Wednesday... Very warm
temperatures will exist on Saturday before cooling slightly by
Sunday. A weak weather disturbance and modest moisture increase will
bring a slight chance for thunderstorms, primarily for gila county,
on Saturday afternoon. Any rainfall amounts will be minimal and
conditions favorable for dry lightning will exist. Otherwise, some
afternoon breezes are possible each day, with the strongest gusts on
Monday and Tuesday afternoons.

Spotter information statement
Spotters are encouraged to follow standard reporting procedures.

Psr watches warnings advisories
Az... None.

Ca... None.

Discussion... Cb
previous discussion... Hernandez kuhlman
aviation... Cb
fire weather... Rogers

Weather Reporting Stations
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Yuma, Marine Corps Air Station, AZ70 mi65 minSW 710.00 miFair82°F45°F27%1010.5 hPa

Wind History from NYL (wind in knots)
Last 24hrS7NW9W4SW3S3S3CalmNE3CalmCalmSW6W6W5W8W6W546W7W5W5W4SW6SW7
1 day agoSE6S5CalmW3--S3CalmCalmNE4Calm35S8SW8SW7S6SW84SW5W7W5W6SW5Calm
2 days agoCalmN4S3CalmS5S6S9SE10SE8SE5Calm3SW5Calm3W5W7W64NW4W3S7SW6S3

Tide / Current Tables for El Golfo de Santa Clara, Sonora, Mexico
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El Golfo de Santa Clara
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Thu -- 12:28 AM MST     2.86 meters High Tide
Thu -- 04:11 AM MST     Moonset
Thu -- 05:57 AM MST     Sunrise
Thu -- 06:43 AM MST     -2.75 meters Low Tide
Thu -- 12:48 PM MST     2.58 meters High Tide
Thu -- 04:11 PM MST     Moonrise
Thu -- 06:50 PM MST     -2.76 meters Low Tide
Thu -- 07:14 PM MST     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

Tide / Current Tables for San Felipe, Baja California Norte, Mexico
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San Felipe
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Thu -- 01:11 AM PDT     4.68 meters High Tide
Thu -- 04:11 AM PDT     Moonset
Thu -- 05:59 AM PDT     Sunrise
Thu -- 07:26 AM PDT     -0.35 meters Low Tide
Thu -- 01:32 PM PDT     4.45 meters High Tide
Thu -- 04:12 PM PDT     Moonrise
Thu -- 07:14 PM PDT     Sunset
Thu -- 07:37 PM PDT     -0.46 meters Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

Weather Map and Satellite Images
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GOES Local Image of Southwest    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 Phoenix, AZ (2,6,7,8)
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Ground Weather Radar Station Yuma, AZ
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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 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 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.