Thursday, August22, 2019

Marine Weather and Tides
Darwin, CA

Version 3.4
7/25/2019 New feature in the Airports section gives a link to 5 minute updates for data reports.
6/2/2019. Many thanks to a user for reporting an error on one of the Edit pages. The switch to PHP 7.2 caused many pages that previously worked to quit working. I fixed many but I still depend on users to report ones I missed. Please report errors HERE or send an email to me at Allen

Sunrise 6:13AMSunset 7:33PM Thursday August 22, 2019 10:49 AM PDT (17:49 UTC) Moonrise 11:37PMMoonset 12:42PM Illumination 54% Phase: Third Quarter Moon; Moon at 22 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 Darwin, CA
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location: 36.33, -117.48     debug

Area Discussion for - Las Vegas, NV
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Fxus65 kvef 221734
area forecast discussion
national weather service las vegas nv
1034 am pdt Thu aug 22 2019

Synopsis Temperatures are expected to dip slightly, though still
remain 3-6 degrees above average through the weekend and into the
following work week. Sunny and dry conditions expected to continue
through the forecast period with the exception of some periods of
high clouds through the weekend. Hints of northwestward moisture
movement for the beginning of next week, though no clear signs of
monsoonal return for now.

Update Temperatures today are running a few degrees behind
yesterday despite a warmer start to the day. High temperatures
across the lower elevations are still expected to be 4-8 degrees
above seasonal normals this afternoon. Though ribbons of cirrus will
move overhead through the evening, excellent mixing should allow
temperatures to reach their full potential. Increasing southerly
winds up the colorado river -- in response to shortwave trough across
idaho -- will drag shallow, near-surface moisture up into southern
mohave county this afternoon. This increase in moisture may temper
afternoon highs and promote shallow cumulus buildups.

Elsewhere, breezy south to southwest winds will peak this afternoon
around 20-30 mph, with strongest corridor of winds focused across
southern nevada and the arizona strip. Elevated fire conditions are
expected today with near-critical winds expected amid very dry

Discussion today through next Thursday.

Models have continued to trend downward with regard to afternoon
highs. This, coupled with lower forecasted heat risk, has resulted
in our premature cancellation of the excessive heat warning
originally queued to expire tonight at 8pm. The areas of greatest
impact look to be along the colorado river valley, though even there
looks to be borderline warning criteria - at best. All this said,
afternoon temperatures are still expected to exceed 5 degrees above
seasonal averages, so preventative measures to avoid heat impacts
should still be taken. These measures include but are not limited
to: limiting time outside, wearing sunscreen, wearing light-colored,
loose-fitting clothing and making sure to drink plenty of water. Due
to the current weather pattern, these above-average temperatures are
expected to continue through the remainder of the forecast period.

That said, we are expecting slightly "cooler" temperatures going
into the weekend. For this, we can thank a digging trough over the
pacific northwest as it pushes eastward, effectively throwing a
northwesterly component into the dominant flow and lowering heights
enough to drop us a few degrees. Similarly, this trough-approach
will tighten surface gradients enough to produce some breezy
southwesterly winds today, particularly in far southern nevada and
northwestern arizona with MAX speeds 20-25 mph that will subside

The most "heat relief" through the weekend will take place in
eastern san bernardino county and southern mohave county where a
modest moisture flux will help bring high temperatures below the
century mark.

Temperatures Monday and Tuesday are expected to approach extreme
values once again, particularly along the colorado river valley and
lower elevations of our cwa. Will continue to monitor and issue heat-
related headlines as we get closer and confidence increases.

Unfortunately, this morning's model runs indicate drier conditions
next week than previous runs. However, the forecast with regard to
moisture still has quite a bit of uncertainty. Pwat values over
northwestern arizona and southern nevada look to exceed 1" in the
Tuesday-Wednesday time frame, though without lifting mechanisms nor
much in the way of instability, it's likely that little will amount
from this moisture flux.

Fire weather Temperatures will remain above-average through the
forecast period. Additionally, southwesterly wind speeds today near
20-25 mph possible, particularly in the higher elevations of
lincoln, clark and mohave counties, though will remain below
critical thresholds. Gusts to 30 mph will be possible before speeds
begin to trend down after sunset. Minimum rh values expected to
remain in the single digits with the exception of far southeastern
california and northwestern arizona that will see a slight moisture
increase with minimum rh values in the teens through the weekend.

Aviation For mccarran... For mccarran... Morning south wind around
10 kts will increase around 18z. Speeds generally between 15 and 25
knots through the afternoon with broken cirrus clouds. Gusts look to
subside this evening with prevailing south wind overnight.

For the rest of southern nevada, northwest arizona and southeast
california... Very little change in the weather pattern will provide
dry weather and only passing cirrus clouds. South-southwest winds 10-
15 knots will prevail today with gusts of 20-25 knots common across
the region.

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

Update... Boothe
discussion... Varian
aviation... Pierce
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
China Lake, Naval Air Facility, CA46 mi53 minN 010.00 miFair83°F46°F28%1006.5 hPa

Link to 5 minute data for KNID

Wind History from NID (wind in knots)
Last 24hr3Calm45W4SE8SW6SW10W12SW10
1 day agoCalm3Calm45S10
2 days agoCalmCalmNE6SE8SE5SW7

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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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.
Link to Loop

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Wind Forecast for Las Vegas, NV (13,3,4,5)
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Ground Weather Radar Station Edwards AFB, CA
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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.