Monday, June26, 2017

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 5:25AMSunset 7:55PM Monday June 26, 2017 5:24 AM MST (12:24 UTC) Moonrise 8:21AMMoonset 10:20PM Illumination 6% Phase: Waxing Crescent; Moon at 2 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 261037
area forecast discussion
national weather service las vegas nv
336 am pm pdt Mon jun 26 2017

Synopsis Temperatures will finally begin to drop early
this week as a weather system moves across the western states. This
system will bring increased winds to much of the region, especially

Short term Today through Wednesday.

The main weather story is increasing southwest winds today across
much of the region and a downward temperature trend each day through
Wednesday. Southwest winds gusting around 25 mph overnight were
responding to the incoming trough that was moving into the
california coast and speeds will increase this afternoon. The latest
high resolution models and MOS guidance indicate winds gusting over
40 mph around the barstow and fort irwin areas this afternoon
through early evening, so a wind advisory was issued from noon until
9 pm pdt for that zone. Elsewhere across san bernardino, clark,
mohave and eastern lincoln counties, a belt of southwest winds with
gusts of 30-35 mph will be common. While temperatures will lower a
few degrees from Sunday's readings, borderline moderate to high heat
risk will hold on to much of the mojave desert region so the
excessive heat warning will remain in effect until 9 pm this
evening. The latest temperature guidance for las vegas is right in
the 109-110 degree range for this afternoon. It will be possible to
continue the streak of 110f plus degree days, but the official
forecast high for mccarran of 109 indicates we will probably come up
just shy of the record of 10 days with 110f plus set in 1961.

Temperatures will drop an additional 2-3 degrees Tuesday and
Wednesday and afternoon breezes up to 25 mph can be expected each

Long term Thursday through Sunday.

An upper level impulse will make its way across the great basin and
southern rockies on Thursday around a larger trough centered over
saskatchewan. Little effect is expected for the local area as
shortwave ridge builds in right behind across the pacific northwest
and more dominant high pressure remains to our south and west.

Thursday and Friday are expected to remain dry with near normal
temps. Long term models begin to diverge Friday night through Sunday
with the development of the next shortwave progged to move across
the southwest over the weekend. Latest ECMWF solution indicates a
stronger shortwave, keeping temps near normal for the weekend with
more significant cloud cover and the latest gfs, being the weaker
solution, brings temps back up above average Friday through Sunday.

Current forecast trends more towards the ECMWF in regards to temps
but both are not showing any introduction of available moisture so
forecast remains dry throughout the long term.

Aviation For mccarran... A lull in the gusty, southwest winds is
expected through late this morning when winds will increase once
again out of the southwest. Highest winds are expected between 20z
and 03z when speeds of 20-25 knots gusting 30-35 knots will be
possible. Winds will slowly come down overnight tonight into Tuesday

For the rest of southern nevada, northwest arizona and southeast
california... Lighter winds early this morning will begin to increase
out of the south southwest by late this morning. Higher winds will
develop in a band across san bernardino, clark, and mohave counties
this afternoon when gusts of up to 40-45 knots will be possible.

Winds slowly decrease overnight into Tuesday morning. Downslope
winds will also be possible on the eastern slopes of the southern
sierra where gusts of 40-45 knots possible across the higher
elevations. Otherwise, a dry airmass will leave rain chances and
cloud cover near nil.

Fire weather Gusty southwest winds will develop today in
response to a dry low pressure system moving across california and
nevada. A red flag warning is in effect this afternoon and early
evening due to strong winds and low relative humidity for portions
of southern nevada and northwest arizona. Another concern is winds
across the sierra and san bernardino counties where gusts of 40-45
mph will occur at times leading to periods of critical fire weather
conditions in those areas this afternoon and early evening.

However, fuels in the sierra are not in the very dry category.

Hydrology Observed flows on unregulated creeks, specifically
independence creek, big pine creek and rock creek indicated flows
have decreased slightly since their peak flows occurred earlier this
week. Creeks, streams and rivers along the eastern sierra slopes of
inyo county as well as the owens valley will be flowing high and
fast through into at least early next week. Minor flooding could
occur near creeks as well as a few low water crossings on some
roadways. Remember, never drive through flooded roadways or around
barricades. Also, pastureland or farmland adjacent to creeks,
streams or rivers could experience areas of standing water.

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

Short term fire weather... Adair
long term aviation... Guillet
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

Wind History from EED (wind in knots)
Last 24hrSE7CalmW5--NW15
1 day ago--SW12SW14SW10W144SW10E6CalmSE3W4CalmCalmE5E3W4NE863NE7SW4N43Calm
2 days agoSW12SW7W10SW17SW15SE5S9SW10

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 (8,2,3,4)
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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 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.