Monday, August21, 2017 L-36.com


Marine Weather and Tides
Sheridan, CO

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 6:17AMSunset 7:48PM Monday August 21, 2017 10:04 AM MDT (16:04 UTC) Moonrise 5:06AMMoonset 6:57PM 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 Sheridan, CO
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location: 39.68, -105.06     debug


Area Discussion for - Denver/Boulder, CO
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Fxus65 kbou 211016
afdbou
area forecast discussion
national weather service denver boulder co
416 am mdt Mon aug 21 2017

Short term (today and tonight)
issued at 416 am mdt Mon aug 21 2017
satellite loop shows mainly high and thin cirrus across the
forecast area, but overall trend has been for more thinning.

Therefore, outside of a couple narrow bands, eclipse viewing
should be relatively unobstructed. There is patchy dense fog over
the northeastern corner of the state, and with additional travel
loads this morning feel an advisory for dense fog is warranted.

This is expected to burn off 8-9 am with gradual dissipation of
the stratus before the eclipse.

For this afternoon, sufficient destabilization of the atmosphere
may be limited to the mountains and palmer divide area given
relatively deep north northeast flow on the plains. There is also
drying working in from the northwest so see most showers and
storms later this afternoon into early evening being confined to
the mountains along south of i-70 and then east across the palmer
divide. The far eastern plains still have an opportunity for
deeper and stronger convection given more moisture and
instability, but overall threat is shifting slightly south east of
our forecast area as low level convergence zones pushes south
faster than earlier forecast. Will lower pops slightly from
denver northward to account for the drying from the north.

Of interesting note, the experimental hrrr shows about 2-5f
cooling associated with the eclipse and significant reduction of
short wave radiation 17z-18z. Have opted to show a slight cooldown
during this period in the temperature grids, then a quick rebound
by 20z.

Long term (Tuesday through Sunday)
issued at 416 am mdt Mon aug 21 2017
weak upslope flow early Tuesday morning may produce patchy fog
across the plains, but at this point it seems like stratus will be
more likely. Some light showers may fall early in the morning,
especially along and east of the divide. A stronger upslope push
is expected in the afternoon to increase shower and storm activity
especially in upslope favored areas, with the far eastern plains
likely not seeing any activity until that evening. Temperatures
will be cooler east of the divide, with the plains cooling to
below seasonal norms. Readings should be in the low to mid 80s. A
weak speed MAX will push into the area Tuesday night to keep the
slight chance of showers and storms over the far eastern plains.

Additional moisture will be drawn up from the desert southwest
Wednesday and Thursday as an upper low off the southern
california coast lifts northeast. Storm coverage will increase and
temperatures will warm back up. As the trough passes over the
state Thursday, expect slightly stronger and wetter storms.

Slight subsidence behind the departing trough will bring less
instability for Friday, but still expecting some activity.

Temperatures will then take a cooling trend as a couple shortwave
troughs originating near the us canada border pushes southeast.

Not much moisture associated with these so expecting not much more
than slightly cooler temperatures and isolated diurnally driven
storms. The upper ridge will be building back over the western us
with drier and warmer conditions possible for early next week.

Aviation (for the 12z tafs through 12z Tuesday morning)
issued at 416 am mdt Mon aug 21 2017
vfr conditions will prevail. Any fog early this morning will
remain well away from the front range airports and over the
northeastern corner of the state. Chance of thunderstorms is
only about 10% 21z-03z, with a little higher 20-30% chance of
gusty outflow winds. Most activity should stay south west of the
metro airports. For later tonight, some stratus with ifr MVFR
ceilings should develop on the plains, perhaps approaching kden
toward 12z. Will continue to monitor that. Winds will become
north northeast 10-15 knots 17z-18z, and then may transition to
light variable toward 02z with potential for weak denver cyclone
wind pattern through early Tuesday.

Bou watches warnings advisories
Dense fog advisory until 8 am mdt this morning for coz048-050-
051.

Short term... Barjenbruch
long term... Kriederman
aviation... Barjenbruch


Weather Reporting Stations
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Denver - Centennial Airport, CO14 mi71 minWSW 410.00 miA Few Clouds72°F42°F34%1013.8 hPa
Broomfield / Jeffco, CO16 mi78 minWNW 330.00 miMostly Cloudy75°F41°F29%1021.3 hPa
Buckley Air Force Base Airport, CO17 mi66 minW 410.00 miPartly Cloudy73°F46°F39%1013.4 hPa
Erie Municipal Airport, CO23 mi69 minN 010.00 miFair74°F43°F33%1021.7 hPa
Denver, Denver International Airport, CO24 mi71 minWSW 510.00 miPartly Cloudy75°F45°F34%1011.5 hPa

Wind History from APA (wind in knots)
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Last 24hr4NE6NE8N7E55NE5NE3SW5W5SW9SW8SW9SW9SW14SW8S4CalmCalmCalmCalmW6W4NW3
1 day ago4SW9NW8SE53SE5S9W7S3N10E9
G16
S8S7S8CalmSW3S4CalmCalmCalmS3E3W5NW4
2 days agoCalm35N10
G15
N5CalmSE9SE10SE8SE8S7S10S10S10S12SE10SE11S6SE3CalmW6CalmSW8SW11

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
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IR Satellite Image from GEOS
west_satellite

GOES Local Image of CentralPlains    EDIT
Geos

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.