Tuesday, January16, 2018 L-36.com

Marine Weather and Tides
Lake Havasu City, AZ

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 7:41AMSunset 5:53PM Tuesday January 16, 2018 11:51 AM MST (18:51 UTC) Moonrise 7:21AMMoonset 5:47PM Illumination 0% Phase: New Moon; Moon at 29 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 Lake Havasu City, AZ
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location: 34.48, -114.34     debug

Area Discussion for - Las Vegas, NV
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Fxus65 kvef 161818
area forecast discussion
national weather service las vegas nv
1018 am pst Tue jan 16 2018

Synopsis A weak disturbance brushing central and southern nevada
with considerable cloudiness today will move off to the east
tonight. Ridging builds back in for midweek before a more active
weather pattern sets up for the end of the week. A cold pacific
system moving onto the west coast will likely bringing winds and a
chance of precipitation to the southwest states by Friday.

Update Some weak radar returns were appearing over southern
nevada this morning and satellite loops showed some enhanced alto
cumulus developing in response to the weak disturbance passing
overhead. Virga was visible, but no precip is expected to reach the
ground from the cloud bases which are 13-15 kft msl. The lincoln
county panhandle could still see a few light showers before the
afternoon is over. The inherited grids look okay and no
immediate changes are needed to the forecast. -adair

Short term Today through Thursday night.

A weak shortwave is still expected to move through the area today.

Current mesoanalysis shows unimpressive radar returns thus far with
this feature as it moves ashore north-central california. Most of
the stronger radar signatures and precipitation reports at the
surface have been orographically driven thus far. As this piece of
energy moves eastward through the day, it will need to fight with an
impressive western ridge and is expected to split as it gets
absorbed into the mean anticyclonic flow. Given the current
observations to the west and the strength of the ridge over the
area, backed off precipitation chances for the sierra and central
nevada areas this afternoon. This matched up well with model trends,
especially on the high res models. Wouldn't be surprised if this
shortwave did nothing but washout and bring a bunch of clouds to the
area today and no precipitation fell at all.

If precipitation were to develop and reach the surface, northern
lincoln county looks to be the most likely location for
precipitation. Areas north of caliente and hiko may see some light
showers, with light snow possible above 8000ft but no accumulation
is expected.

The shortwave will exit the area tonight and another ridge will
build in behind it for Thursday. Expect quiet weather with mostly
sunny skies on Thursday as temperatures remain above normal.

The next system swings onshore the west coast later on Thursday and
moves east towards the area Thursday night. Models continue to trend
slower this the eastward push of precipitation overnight as a cold
upper level pacific trough moves into california. Adjusted precip
chances slightly to reflect this slower trend. Think the bulk of the
precipitation wont arrive until Friday. Winds overnight Thursday
will increase though, and higher elevations should start seeing
some stronger gusts through the night.

Long term Friday through Monday.

Still on track for a significant change in the weather as a storm
system impacts the region over the weekend, with the possibility
of a second, weaker storm affecting the southern great basin
Monday. For the first storm, the GFS is still swinging the system
through more quickly than the ecmwf, although the difference
between the two operational runs is quite a bit less than it was a
couple of days ago. Precip chances will be underway in the sierra
by Friday morning, then spread south and east, possibly making it
as far south as i-40 Friday night and Saturday morning. Precip
chances will end from west to east on Saturday as the trough axis
moves by and ushers in much cooler air. The cold air will pour in
at nearly the same time as the rain chances end, with a few
snowflakes possibly mixing in as the rain ends even as low as
3500-4000 feet. The cold air will also knock high temperatures
down about 5-10 degrees from Friday to Saturday over much of the
mojave desert, with the cold air staying in place at least through
Sunday. A couple of days ago, it looked like warm air advection
ahead of the next system approaching the west coast would start a
warming trend in our area on Monday, but that warming trend looks
much more muted today. Any precip chances for Monday will likely
be confined to the sierra and the higher terrain of the southern
great basin.

Aviation For mccarran... Other than broken CIGS above 20fkt, no
impactful weather is expected across the airspace through Wednesday.

Winds will generally be light through the period with typical
diurnal trends.

For the rest of southern nevada, northwest arizona and southeast
california... A weak disturbance will brush the southern sierra and
central nevada this afternoon with cloud bases near 12 kft msl and
some light precipitation near mountain tops. The rest of the region
will continue to see dry weather with light winds under periods of
clouds above 20 kft. Localized daytime gusts around 20kts knots will
persist near laughlin-bullhead city.

Spotter information statement Spotters are encouraged to report
any significant weather or impacts according to standard operating

Short term aviation... Wolf
long term... .Morgan
for more forecast information... See us on our webpage:
http: weather.Gov lasvegas or follow us on facebook and twitter

Weather Reporting Stations
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Needles, Needles Airport, CA25 mi1.9 hrsN 010.00 miFair61°F39°F46%1020.5 hPa

Wind History from EED (wind in knots)
Last 24hrNE8NE4NE9N8N10N9NW6NW6NW6NW4NW4W5NW4CalmCalmW5W9CalmW5CalmSW6E3CalmN6
1 day agoN10N11N14N11N13N7NW6N8NW5W8W8W4W3W4W4W4W3W3SW3SW6CalmSW4CalmCalm
2 days agoN10N13NE15N13

Tide / Current Tables for
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Tide / Current Tables for
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Weather Map and Satellite Images
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Weather Map
IR Satellite Image from GEOS

GOES Local Image of Southwest    EDIT

Wind Forecast for Las Vegas, NV (13,3,4,5)
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Ground Weather Radar Station Las Vegas, NV
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weather_mapweather_map weather_map

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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 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.