Thursday, March21, 2019

Marine Weather and Tides
Castle Pines, CO

Version 3.4
What's New / NOTES
10/6/2018 Colors of tide XTide graphs changed to emphasize that they were upgraded. See next note. Comments welcome.
10/4/2018 I have fixed XTide and updated the harmonic files. There were some name changes so you might have to click EDIT to find the new station name.

Sunrise 6:59AMSunset 7:13PM Thursday March 21, 2019 10:00 AM MDT (16:00 UTC) Moonrise 8:12PMMoonset 7:44AM Illumination 100% Phase: Full Moon; Moon at 15 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 Castle Pines, CO
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location: 39.45, -104.89     debug

Area Discussion for - Denver/Boulder, CO
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Fxus65 kbou 211010
area forecast discussion
national weather service denver boulder co
410 am mdt Thu mar 21 2019

Short term (today and tonight)
issued at 409 am mdt Thu mar 21 2019
elongated upper level trof remains along the west coast with high
pressure ridge parked to the lee of the rocky mountains. Very dry
airmass to the east of the mountains, while some increase in
middle and high level moisture occurring over the eastern great
basin and into western colorado. Some of the deeper moisture will
work its way into the mountains this afternoon with scattered
showers developing and even a possible thunderstorm. There will be
some weak QG ascent in advance of the trof to help enhance shower
activity. Showers will be favored over western park county
(mosquito range) with preferred southeast flow at mountain level
from later this afternoon through tonight. Could see 2 to 4 inches
of snow in this area with lesser amounts further north.

Across lower elevations today, expect a slow increase in high
level moisture during the day while 700mb temperatures climb
between 0 to +1c. This will result in continued warmer
temperatures with readings in the 60s on the plains. Lowering
surface pressure over the front range will increase the surface
gradient to the east and resulting gusty southerly winds this
afternoon. Could see a few light showers developing on the plains
tonight as the storm system moves into utah with a moderate
southerly flow on the plains, precipitable water values increase
to around a half of an inch, and weak QG ascent.

Long term (Friday through Wednesday)
issued at 409 am mdt Thu mar 21 2019
an active weather pattern is expected across north central and
northeastern colorado through the weekend with warmer and drier
weather next week
an upper level storm system tracking across colorado will bring
unsettled weather to the region Friday through Saturday. Latest
model runs have trended slower and further to the south with this
system. Yesterday's 00z runs had the 500 mb low center tracking
across the northern rockies with an upper trough extending south
across colorado and new mexico. Tonight's runs now have the upper
level low pressure center tracking across colorado. The gfs, ecmwf
and the gem all have the 500 mb low centered over southeastern
colorado at 06z Saturday, while the 00z NAM places the low
further to the north just to the north of denver. The latest 06z
nam has come in line with the other models and now has the upper
low tracking across southeast colorado as well.

Snow is expected to increase across the high country by Friday
afternoon as the upper trough moves into western colorado. Favorable
northwesterly flow aloft combined with deep moisture and plenty of
instability should bring a period of moderate to heavy snow across
the north central mountains from Friday afternoon into the evening.

The snow should decrease by midnight as moisture and instability

Showers and a few storms are expected to develop across the plains
mid to late Friday morning and then become more numerous during the
afternoon and evening hours. The precipitation is expected to
decrease by Saturday afternoon as the upper level low moves into the
central plains states. However, some showers could continue across
far northeast colorado into the evening.

Latest 00z runs are focusing the precipitation north and east of
denver with the heaviest amounts over weld county. The NAM and gfs
models have qpf's between 1 and 2 inches across central and northern
portion of weld county. The precipitation could mix or change over
to snow during the evening hours, however the models are showing the
snow to be brief. The majority of the SREF and GFS plumes show
little to no snow on the plains with accumulations less than an
inch. However, if the track is a little slower and the system can
pull in a little more cold air, snow amounts could be higher,
especially along the convergence line on the back side of the upper
low. We'll have to keep a close eye on this storm, especially since
it's march.

Drier weather is expected late Saturday into Sunday as weak upper
level high pressure moves over colorado. However, the mountains
could still see a few snow showers.

Another short wave is forecasted to bring more snow to the high
country and rain and snow showers to the plains from Sunday
afternoon into Monday morning. This system looks weaker and not as
cold as yesterday's runs were indicating. Drier weather is
expected to return on Monday with a warming trend through the
middle of next week as upper level high pressure builds over the
rocky mountain region. High temperatures on the plains could reach
70 degrees on Wednesday.

Aviation (for the 06z tafs through 06z Thursday night)
issued at 245 am mdt Thu mar 21 2019
vfr today with increasing high level moisture, especially this
afternoon and evening. Surface winds will increase from the south
and southeast this afternoon with increasing surface gradient.

Could see isolated rain showers on the plains tonight but with
very low areal coverage will not mention in taf's.

Bou watches warnings advisories

Short term... Entrekin
long term... Kalina
aviation... Entrekin

Weather Reporting Stations
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Denver - Centennial Airport, CO8 mi68 minSE 610.00 miMostly Cloudy41°F24°F51%1022.4 hPa
Buckley Air Force Base Airport, CO21 mi3 hrsS 910.00 miPartly Cloudy33°F20°F59%1022 hPa
Elbert Mountain, Monument Pass, CO21 mi73 minno data10.00 miFair37°F21°F52%1023.7 hPa

Wind History from APA (wind in knots)
Last 24hrNW3CalmN9N4NE74E53E6SE4S7S5S5CalmSE9S6SW7SW6S5S6SE7S10SE6SE7
1 day agoNE5NE8N103N6E8N7
2 days ago3Calm3NE6N6N10N9N11N8NW5NW4NW5NW6N10NE3N6NW4NW3NW5CalmN7NE3NE7N7

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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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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Wind Forecast for Denver/Boulder, CO (12,3,4,5)
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Ground Weather Radar Station Denver/Boulder, CO
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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.