Saturday, April20, 2019 L-36.com


Marine Weather and Tides
Brighton, 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 6:12AMSunset 7:43PM Saturday April 20, 2019 10:42 AM MDT (16:42 UTC) Moonrise 9:20PMMoonset 7:19AM Illumination 99% Phase: Waning Gibbous; Moon at 16 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 Brighton, CO
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location: 39.94, -104.76     debug


Area Discussion for - Denver/Boulder, CO
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Fxus65 kbou 201056
afdbou
area forecast discussion
national weather service denver boulder co
456 am mdt Sat apr 20 2019

Short term (today and tonight)
issued at 456 am mdt Sat apr 20 2019
with the upper level ridge centered over colorado this morning,
it looks like today will be the warmest day of the year so far,
with high temperatures approaching the 80 degree mark across the
plains. Mountain areas will also be climbing into the 50s, with
some lower 60s in middle park. High level clouds will be on the
increase through the day, but they should do little to slow down
the warming brought on by the downsloping effects of the westerly
flow at mid levels. A weak upper disturbance will be moving up
from northern arizona late this afternoon through tonight which
will bring the chance of showers and thunderstorms over the
mountains overnight. The weak trough is expected to be over
northeast colorado tomorrow morning which have an impact on
tomorrow's weather. Overnight, the plains should remain dry as the
airmass stabilizes at lower and mid levels overnight, in spite of
the weak forcing brought on by the upper disturbance.

Long term (Sunday through Friday)
issued at 456 am mdt Sat apr 20 2019
an upper trough oriented west to east across northern colorado
will continue pushing north as the surface and 700mb low move
east enough to allow for northerly winds to push colder air down
along the urban corridor. CAPE values of 300-600 j kg along the
urban corridor, then higher amounts of 800-1200 j kg are being
depicted by the models... However leaving the northeastern plains
more stable. Model differences already arise as the 700 mb flow
stays westerly on the nam, whereas the GFS allows for some upslope
northeasterly direction. This will have a big effect on how much
precipitation is expected along the front range mountains,
foothills and urban corridor. Pwats are similar - increasing to
near climatological MAX of 0.8 inches over dia in the afternoon,
and snow levels are similar up near 10,000 feet msl by Sunday
evening. However, differing winds along the front range is
resulting in different QPF amounts. So still expecting scattered
to numerous showers with embedded thunderstorms over the mountains
as well as the plains except for logan, phillips and washington
counties. Storm motions will be slow with winds up to 500 mb 15
kts or less. So showers and storms will have the potential for
heavy rain and small hail. GFS continues to be the wettest with
24 hour amounts by Monday morning of broad 1.5 - 2 inches
stretching from lincoln county up through denver and to the
northern foothills. The other models are lighter, generally less
than half an inch, but all are putting their heaviest precip over
northern larimer county as another shortwave trough moves north
over the state to but the best dynamics near the northern state
border. Snow levels will drop, but confidence is still low to
moderate on where that may be. Models have trended slightly higher
during the last 00z runs, but NAM continues to be the
lower colder model by about 1500 feet. General consensus is about
8k-9k feet msl, yet the nam GOES down to about 6500. Will lower
the consensus slightly to around 7000 feet. Locations above this
will have moderate to at times heavy snow especially along and
east of the divide, whereas below over the plains, just expect
moderate rain. The front range mountains and foothills could see 3
to 6 inches of snow, with some spots seeing upwards of 6 to 8
inches by sunrise Monday.

The main energy and center of the upper low will dig further south
during Monday into arizona as the associated upper trough
stretches across the state and up towards the great lakes. This
will allow for additional showers and thunderstorms over the
mountains, but high surface pressure pushing into the northeastern
co plains will keep the airmass mostly stable except along the
foothills where showers will continue with help of lift. Another 2
to 6 inches of snow will fall over the mountains with snow levels
around 8000. Areas along and south of i70 may see localized
heavier amounts due to convection. Amounts may get up towards
highlight criteria from noon until midnight, but not feeling
confident at this time to pick what that would be. Temperatures
will likely be the coldest of the week due to the stable day in
the post frontal airmass. Highs over the plains will likely
struggle to get much above 50.

The upper trough will continue sliding southeast allowing for
drier northwesterly flow to push into the state Tuesday. Still
expect some scattered snow showers over the mountains during the
afternoon before an upper ridge from the west moves in to bring
drier weather. Temperatures will warm slightly.

An upper ridge will build in from the west Wednesday and Thursday,
however weak impulses will push down on the northwesterly flow for
some scattered showers and some cooler air intrusions possible
over the northeast corner.

Model agreement becomes very poor after Thursday when some show
ridging and others show troughing. Forecast will follow a warming
trend and mostly dry weather.

Aviation (for the 06z tafs through 06z Saturday night)
issued at 456 am mdt Sat apr 20 2019
minimal aviation impacts expected today with just high cloudiness
and southerly winds. Middle level cloudiness will be increasing
overnight, but no precipitation is expected. Winds will switch to
westerly as some rain-cooled air moves out of the mountains.

Bou watches warnings advisories
None.

Short term... Dankers
long term... Kriederman
aviation... Dankers


Weather Reporting Stations
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Denver, Denver International Airport, CO8 mi50 minSSW 710.00 miMostly Cloudy69°F19°F15%1008.3 hPa
Buckley Air Force Base Airport, CO15 mi1.7 hrsSSW 710.00 miMostly Cloudy64°F26°F24%1009.4 hPa
Erie Municipal Airport, CO16 mi49 minN 010.00 miFair60°F31°F34%1015.2 hPa
Denver Nexrad, CO16 mi49 minN 010.00 miMostly Cloudy72°F17°F13%1014.6 hPa
Broomfield / Jeffco, CO19 mi2 hrsNE 310.00 miMostly Cloudy61°F30°F31%1014.9 hPa

Wind History from DEN (wind in knots)
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Last 24hrNE9NE7NE10
G18
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SE44SE7E5SE6S10S11S11S11S17S17S14SW12SW15S11SW10SW9SW9S10S7
1 day agoNE8NW8
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N19E10E10E5SE8SE5CalmCalmSE6S12S11SW8SW7SW8S5S3Calm
2 days agoN9NE10
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N10N9E5E7NE6NE4E94SW6NE19
G28
NE11CalmCalmCalmS5S8SE3E3NE17N13

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    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

Other links: Northern Pacific     Contential US     Full GOES-East
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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Disclaimer:
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.