Wednesday, October18, 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 7:13AMSunset 6:16PM Wednesday October 18, 2017 2:35 PM MDT (20:35 UTC) Moonrise 4:56AMMoonset 5:07PM Illumination 2% Phase: Waning Crescent; Moon at 28 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 181647
afdbou
area forecast discussion
national weather service denver boulder co
1047 am mdt Wed oct 18 2017

Update
Issued at 1036 am mdt Wed oct 18 2017
satellite WV showing drying moving in from the north that will
push in over the next hour helping to dissipate the mountain wave
from north to south. A dry cold front is on track to move south by
the afternoon bringing a NE to E wind push but no precipitation.

Everything else is on track.

Short term (today and tonight)
issued at 446 am mdt Wed oct 18 2017
a jet streak will move across northern colorado this morning.

There is a band of high clouds associated with this. It is mainly
thin, but thicker in a mountain wave over the front range. This
should diminish later today, but there is still some high level
moisture upstream. There is a little reflection of the passing
feature at low levels, with some enhancement of westerly flow
occurring this morning, then a wind shift on the plains behind the
jet streak this afternoon. The pressure rises will be sliding from
north through east of us, but will turn the low level winds on the
plains around to the north and then east. We won't really be in a
different airmass, so this should only produce slight
cooling moistening over the plains this afternoon. With mostly
clear skies and continued very dry air, it will be another cool
night in the mountain valleys tonight. I dropped low temperatures
in the colder areas to values similar to this morning, a
compromise between the previous forecast and the MOS guidance.

Long term (Thursday through Tuesday)
issued at 446 am mdt Wed oct 18 2017
thu and Thu night... A weak southwesterly flow aloft will be
over co ahead of the next pacific trough. The trough axis will move
into western co by 00z Friday then into the nebraska panhandle by
12z Friday. GFS and NAM cross-sections show limited moisture in the
the mountains on thu, with minimal QG ascent present as the system
passes across the CWA Thu night. Unseasonably warm temperatures will
keep the fire danger high over the northeast plains Thu aftn. The
models continue to show gusty southerly winds in the 25-30 mph range
with highs in the mid to upper 70s. The strongest wind gusts however
will be offset by relative humidities in the mid 20s. Consequently,
not all the parameters meet critical fire weather conditions so we
still do not yet anticipate fire weather highlights for these areas.

Spatial cross-sections indicate gusty downslope winds in the
mountains and higher foothills for a brief time around 12z Friday,
with gusts in the 40-45 mph range. On Friday, an increasing
west southwesterly flow will develop with weak to moderate qg
ascent by 00z Saturday ahead of next incoming trough. This
stronger pacific trough will pass across northern co Friday night.

Overall timing and intensity has been pretty consistent from run
to run. In the mountains, the deepest moisture and strongest lift,
albeit brief, will occur in the 03-09z window. Weakening mid
level ascent will occur Saturday morning, followed by moderate qg
descent and drying by Saturday aftn. 700 mb temperatures around
+10c Thu and Fri aftn, then around -5c Sat aftn. Increasing mid
level subsidence and strong cold air advection will allow for dry
and cool weather across the northeast plains Saturday barring an
isolated shower or two in the morning. The cold front will push
through northeastern co around 06z Friday night, with northwest
winds 10-20 mph through the day Saturday. In and around denver, an
anticyclone may occur with weaker east northeast winds in the
aftn. On Sunday, a dry northwesterly flow aloft will be in place
with a ridge aloft overhead. Warmer temperatures can be expected
going into early next week as a ridge builds over the west coast.

Gusty west northwest winds likely at times especially in the
mountains and foothills. There may be a little cooling on Tuesday,
following a weak frontal passage Monday night. The flow aloft is
expected to remain northwesterly through the middle of next week.

Aviation (for the 18z tafs through 18z Thursday afternoon)
issued at 1036 am mdt Wed oct 18 2017
vfr conditions are expected to continue through the TAF period
with winds turning nne by 17z then NE by 20z with the frontal
passage. Speeds are expected to remain between 5 and 8 mph through
23z.

Bou watches warnings advisories
None.

Update... Bowen
short term... Gimmestad
long term... Cooper
aviation... Bowen


Weather Reporting Stations
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Denver - Centennial Airport, CO14 mi42 minVar 310.00 miPartly Cloudy73°F3°F6%1016.2 hPa
Broomfield / Jeffco, CO16 mi48 minWSW 550.00 miA Few Clouds75°F12°F9%1021.3 hPa
Buckley Air Force Base Airport, CO17 mi37 minN 010.00 miA Few Clouds74°F6°F7%1015.3 hPa
Erie Municipal Airport, CO23 mi41 minN 010.00 miFair76°F6°F7%1022 hPa
Denver, Denver International Airport, CO24 mi42 minWSW 410.00 miA Few Clouds75°F9°F8%1013.9 hPa

Wind History from APA (wind in knots)
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Last 24hrN5NE3E3SE3S4S5S6S5SE7S6S6S7SW12SW14SW11SW8SW9SW9E4SW8W5N453
1 day agoNW5CalmCalmCalmSW6S5S4SW6S7S5S7S7SW9SW7S7SW8S6SE5SE4E4S44Calm4
2 days agoNE5N6N8N8NW5W8W5S7S4S4S6S5S6S5SE5SE4S9E6CalmSW11SW10W7NW6NW3

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 (16,3,4,5)
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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.