Monday, September25, 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 6:49AMSunset 6:54PM Sunday September 24, 2017 10:13 PM MDT (04:13 UTC) Moonrise 10:07AMMoonset 8:46PM Illumination 20% Phase: Waxing Crescent; Moon at 4 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 250350
afdbou
area forecast discussion
national weather service denver boulder co
950 pm mdt Sun sep 24 2017

Update
Issued at 950 pm mdt Sun sep 24 2017
web cameras around northeast colorado show quite a bit of drizzle
across the plains, with radars also showing rain showers over
larimer and lincoln counties. Upslope low level flow is expected
to continue through the night, which should keep the drizzle
going. Only change to the forecast will be to add widespread
drizzle overnight. The airmass is expected to remain cool through
tomorrow afternoon and evening, so also removed the mention of
thunder from the forecast tomorrow night.

Short term (this evening through Monday)
issued at 300 pm mdt Sun sep 24 2017
upper low over northeast utah and slowly weakening and moving
slowly northeast into wyoming. There is some weak ascent aloft
ahead of the low and this is helping to generate some very light
rain and drizzle over the front range and portions of the
northeast plains. This will continue through at least this evening
and most likely continue over the plains through tonight. Expect
the low stratus deck to remain anchored in place tonight and at
least through Monday morning with shallow and moist upslope flow
in place. The main trof axis will still linger over western
colorado through Monday with weak ascent continuing through
eastern colorado. Subsidence and drying will be moving into the
mountains later in the day. Temperatures will be only slightly
higher than yesterday's readings.

Long term (Monday night through Sunday)
issued at 300 pm mdt Sun sep 24 2017
by Tuesday the 500mb low is progged to be over western north dakota
and its weakening upper trough extending back to the desert
southwest. This puts colorado under a relatively light southwesterly
mid-level flow. However there's still plenty of cold air aloft with
the 700-500mb temps over the CWA which should keep sfc temps well be
average for one more day. Meanwhile, the local airmass becomes drier
with a shift to a south-southwest low-level flow. However, a shift
to a slightly wetter southeast sfc flow on the plains, could see
isolated showers t-storms forming late afternoon over the SRN front
range foothills and south park area. Overnight and Wednesday, a
shift to a southerly mid-level flow as an upper low winds up over
the desert southwest will advect increasing amounts moisture up into
colorado, some of it reaching the CWA by Wednesday afternoon. Warmer
temps, increasing QG forcing and a southeasterly upslope flow will
increase the chance of afternoon early evening t-storms specifically
across the southwest corner of the cwa. Storms will be slow movers
with light steering winds, but rain amounts will generally be light.

Except for isolated late day storms on the palmer divide, the chance
for precip on the plains appears quite low.

By Thursday... Models show the desert SW low lifting newrd over the 4-
corners area, bringing with its a decent amount of moisture. Weak to
moderate QG forcing in advance of the cyclone expands over the fcst
area through the day. Furthermore, the GFS indicates a deep easterly
upslope flow on the plains Thursday, whereas the ECMWF and canadian
models show the upslope flow no where as strong. Yet all three
models indicate areas of light QPF for most of the CWA Thursday
afternoon and overnight. By Friday, models begin diverging as the
ecmwf and canadian models shows the upper low lifting north over
western wy, the GFS filling the low and opening the trough up over
utah and colorado. The GFS keeps the CWA cool and wet, the canadian
models not quite as showery, and the ec cloudy but with lower rain
chances. Will go with a blend of these sceneries and keep temps
slightly below average. For the weekend, models show some form of
this trough passing over the state possibly giving us at least a
slight chance of showers both days. Although latest temp guidance
shows temps returning to above average.

Aviation (for the 06z tafs through 06z Monday night)
issued at 950 pm mdt Sun sep 24 2017
low ceilings and drizzle are expected to persist overnight, with
ifr and lifr across the denver area airports. Should see ceilings
and visibilities increase through the late morning and early
afternoon tomorrow, but ceilings may not get much higher than 2000
feet agl.

Bou watches warnings advisories
None.

Update... Dankers
short term... Entrekin
long term... Baker
aviation... Dankers


Weather Reporting Stations
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Denver - Centennial Airport, CO14 mi21 minNNW 103.00 miLight Drizzle Fog/Mist46°F46°F100%1016.1 hPa
Broomfield / Jeffco, CO16 mi24 minNNW 63.00 miLight Rain Fog46°F46°F100%1018.3 hPa
Buckley Air Force Base Airport, CO17 mi76 minNNE 53.00 miLight Drizzle Fog/Mist47°F46°F100%1014.6 hPa
Erie Municipal Airport, CO23 mi16 minN 010.00 miOvercast48°F46°F97%1019.6 hPa
Denver, Denver International Airport, CO24 mi21 minNNE 72.00 miLight Drizzle Fog/Mist47°F45°F93%1014.6 hPa

Wind History from APA (wind in knots)
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Last 24hrN6E4E4NE3CalmE4E4E4SE4SE5SE3SE3E5NE7E7E8
G15
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G16
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1 day agoNE8N13N10N7N6NE4N4NE3N5N7NW6NW7NE4NE6N10N9N12N10N14N15
G20
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2 days agoS10S12S12S11S12
G29
S12S6S10N43NW3N5N6NW11
G15
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G21
SW16
G25
NW14NW15N13N7NW10NW6NW7

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 (0,6,7,8)
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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.