Sunday, April30, 2017 L-36.com


Marine Weather and Tides
Sheridan, CO

Version 3.4
What's New / NOTES
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.
3/12/2015 - Added section for Gulf current for users in the GMZ marine zones.
This was requested by a user. If you have requests, please let me know.

Sunrise 5:59AMSunset 7:55PM Sunday April 30, 2017 10:43 AM MDT (16:43 UTC) Moonrise 8:55AMMoonset 11:42PM Illumination 22% Phase: Waxing Crescent; Moon at 5 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 301031
afdbou
area forecast discussion
national weather service denver/boulder co
431 am mdt Sun apr 30 2017

Short term (today and tonight)
issued at 431 am mdt Sun apr 30 2017
the strong spring storm remains over western kansas this morning
with only minor impacts on northeast colorado, except for the high
cloud cover on the west side of the vertically stacked system.

Radar data shows that the precipitation shield has retreated to
the east of washington and lincoln counties, leaving the northeast
colorado plains under dry and stable north to northwesterly flow.

Temperatures have dropped into the mid and upper 20s at most
locations along the i-25 corridor while holding in the lower to
mid 30s over the northeastern counties. Cloud cover associated
with the storm system has reduced the amount of radiational
cooling. Will let the freeze warning continue across the plains
since there is still a couple more hours of possible cooling.

Partly cloudy to mostly sunny skies will be the rule across the
forecast area as the spring storm gradually moves away from
colorado. Strong insolation will warm temperatures into the 50s,
melting off the snow cover. In the mountains, sunny skies this
morning will give way to increasing clouds during the afternoon as
moisture aloft arrives from the pacific northwest. Later tonight,
light snow is expected to develop in the mountains as the moisture
aloft continues increasing. Accumulations should be less than a
couple inches. Low temperatures on the plains are expected to only
drop to the mid 30s tonight, due to modification of the airmass
today and the presence of increasing moisture aloft from the
northwest. There will be no need for any frost or freeze
highlights.

Long term (Monday through Saturday)
issued at 431 am mdt Sun apr 30 2017
nwly flow aloft will be over the area on Mon into Mon night with
some moisture embedded in the flow. Orographics will remain
favorable in the mtns with lapse rates in the 5-6 c/km range. Will
see steadier snow showers in the morning but activity may become
more sct in the aftn. Across the plains there may be enough
instability fm the aftn into the early evening hours to keep in a
slight chc of showers. As for highs readings will be in the upper
50s to lower 60s over nern co.

For Tue into Wed there is still some uncertainty on the strength and
how fast an upper level trough will move across in NW flow. The 12z
data was slower and stronger with this feature while tonight's data
is faster and weaker. At this point it appears main impacts of this
trough would be fm Tue aftn into early wed. With mid lvl ascent and
decent lapse rates along with favorable orographic flow, snow
should increase in the mtns Tue aftn into Tue night. Across nern
co still expect a good chc of showers late Tue aftn into tue
night as main system moves across. Soundings show there could be a
mix of rain and snow down to 5500 ft late in the night into early
wed morning.

By Wed aftn the upper level trough should move SE of the area with
pcpn chances ending. As for temps will keep readings in the mid to
upper 50s across the plains.

For Thu and Fri an upper level ridge will gradually build into the
area. This will lead to a dry ptrn with much warmer temps. In fact
by fri, highs over nern co will be in the 75 to 80 degree range.

On Sat the upper level ridge will remain over the rgn as a stg
upper level low is located along the west coast. Some mid lvl
moisture may be emdedded in swly flow aloft which could lead to a
slight chc of showers mainly in the mtns. Highs across nern co
will be in the upper 70s to lower 80s.

Aviation (for the 06z tafs through 06z Sunday night)
issued at 431 am mdt Sun apr 30 2017
aviation impacts should be minimal today and tonight as dry air
has moved over the i-25 corridor and storm system over western
kansas is forecast to travel northeastward, away from colorado,
through today. Northerly pressure gradients will keep the wind out
of the north to northwest until this evening when pressure
gradients will relax and drainage southerlies develop overnight.

Wind speeds through the afternoon will be 10 to 15 knots with
gusts of 20 to 25 knots at times. Ceilings and visibilities should
remain unlimited.

Bou watches/warnings/advisories
Freeze warning until 8 am mdt this morning for coz038>051.

Short term... Dankers
long term... Rpk
aviation... Dankers


Weather Reporting Stations
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Denver - Centennial Airport, CO14 mi50 minNNW 510.00 miMostly Cloudy34°F19°F54%1018.2 hPa
Broomfield / Jeffco, CO16 mi48 minN 030.00 miPartly Cloudy37°F17°F45%1015.9 hPa
Buckley Air Force Base Airport, CO17 mi1.8 hrsN 710.00 miMostly Cloudy30°F21°F69%1017 hPa
Erie Municipal Airport, CO23 mi48 minN 010.00 miFair39°F19°F46%1015.9 hPa
Denver, Denver International Airport, CO24 mi50 minNNE 1610.00 miMostly Cloudy38°F21°F52%1013.4 hPa

Wind History from APA (wind in knots)
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Last 24hrN10N10N12N13N16
G21
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1 day agoNE10
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2 days ago3N18N4N13N8NE10N9NE12E11E8SE4SE4NW14NW6NW7W8W7W4W5SW5S5SW10W6NW8
G14

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
wmap_P
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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weather_mapweather_map weather_map

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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.