Thursday, May23, 2019

Marine Weather and Tides
Sheridan, 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 5:37AMSunset 8:16PM Thursday May 23, 2019 5:28 PM MDT (23:28 UTC) Moonrise 11:43PMMoonset 8:45AM Illumination 76% Phase: Waning Gibbous; Moon at 20 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 232036 cca
area forecast discussion... Corrected
national weather service denver boulder co
236 pm mdt Thu may 23 2019

Short term (this evening through Friday)
issued at 225 pm mdt Thu may 23 2019
upper level low can be seen on water vapor and is moving nne into
utah, with increased lift out ahead of it in western and central
colorado. With the upper jet moving over central colorado
increasing south to southwesterly winds aloft speeds over the
higher terrain have increased at berthoud pass and others. The
showers that were in place over western colorado for most of the
morning are starting to move over the divide and central mountains
as the jet pushes eastward. Snow has started to increase in
intensity across park and summit counties with the snow pushing
north and increasing in coverage over the next few hours.

Lightning has been seen in the storms over the west with the
increased lift. This will help with the convective nature of the
snow showers over the higher terrain and could cause a few hours
of reduced visibility and hazardous travel conditions over the
higher mountain passes. Will keep the advisory in place to account
for the increased impacts into the early evening hours. Across
the lower elevations the surface high is gradually lifting to the
nne with increasing SE winds on the plains. The increased low
level upslope flow will allow for continued light rain and
lowered clouds into the evening hours. With the cooling aloft and
upper jet moving across later this afternoon some increased
showers will be possible after 2 pm for a few hours. By the
evening hours, upper flow will turn more southwesterly in the mid
to lower levels and westerly aloft. This will usher in drier flow
as the upper low pushes north. This will bring an end to the
precipitation across the plains after midnight tonight. Some
lingering snow showers will be possible in the northern mountains
due to moisture and the exiting jet so kept pops over that region.

For Friday, snow will end over the far northern mountains by the
afternoon with continued dry conditions across the plains.

Temperatures will rebound with highs in the upper 60s to lower
70s. Westerly flow will continue across the mountains allowing
enough stability to bring some increased winds to the higher
terrain during the afternoon hours. Some isolated storms will be
possible across the mountains by the afternoon with a mix of rain
and some snow possible over the higher terrain.

Long term (Friday night through Thursday)
issued at 225 pm mdt Thu may 23 2019
for Friday night and Saturday, there will be continued
weak troughiness across southern california and a downstream
southwest flow aloft over colorado. This will result in a
generally dry weather pattern with warming temperatures. Synoptic
forcing will be weak subsidence to neutral forcing. 700mb
temperatures will climb to 7-8c by Saturday afternoon and a return
to temperatures in the 70s. The only chance of showers will be
over the far northern mountains, closer proximity to the upstream

By late Saturday and Sunday, a deeper storm system will dive across
southward across california with a continued moderate south to
southwest flow aloft. Thermal ridge will be over colorado Sunday
afternoon with even warmer temperatures as 700mb temperatures warm
to +11c. Expect an influx of low level moisture on the plains
Saturday night and Sunday and with improving profile could be a
few stronger storms out towards the border areas with nebraska and

On Sunday night, the california low begins to move
eastward into the southern great basin with increasing moisture
and weak upward QG ascent developing. This could lead to a greater
chance for showers by Sunday evening in the mountains and
possibly over the far northeast plains in proximity to dry line
with better moisture over the central plains.

Colorado weather will become more unsettled again from Monday
through Wednesday as the california low moves across central and
northern colorado during the Monday night and Tuesday time period
along with a strong upper jet to help provide lift. Both GFS and
european solutions continue to be similar in the timing and track.

Best chances of showers will be over northern sections of CWA for
locations just north of the upper low. Snow levels will lower down
to around 8000 feet by Tuesday morning with some snow accumulation
again over the higher foothills and mountains.

The synoptic pattern becomes more clouded by midweek with expected
some troughiness will remain over the great basin but long range
models showing rather diverse solutions. Drier and warmer again by
late week with just isolated late day showers and storms.

Aviation (for the 18z tafs through 18z Friday afternoon)
issued at 225 pm mdt Thu may 23 2019
MVFR ceilings will prevail through the afternoon with rainshowers
possible between 22z and 01z. Showers will move out and ceilings
will gradually lift after 03z withVFR conditions after 03. Winds
will be mainly from the SE with some variable gusting up to 18kts
through 01z. Winds will switch over to the ssw around 03z with
winds staying under 10kts.

Bou watches warnings advisories
Winter weather advisory until 6 pm mdt this evening for coz033-

Short term... Bowen
long term... Entrekin
aviation... Bowen

Weather Reporting Stations
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Denver - Centennial Airport, CO14 mi36 minESE 710.00 miOvercast44°F37°F76%1013.2 hPa
Broomfield / Jeffco, CO16 mi42 minWNW 310.00 miShowers in Vicinity43°F37°F81%1014.2 hPa
Buckley Air Force Base Airport, CO17 mi91 minESE 88.00 miOvercast44°F36°F75%1012.8 hPa
Erie Municipal Airport, CO23 mi29 minN 310.00 miOvercast44°F38°F81%1015.6 hPa
Denver, Denver International Airport, CO24 mi36 minSE 710.00 miOvercast45°F39°F80%1011.7 hPa

Wind History from APA (wind in knots)
Last 24hrCalmE3W5N7N6N7NE4E6SE5SE4E3E7E5SE8SE9E5E6E6SE12
1 day agoN6N7NE8N8NE3SE4S5SE5SE5E4SE3S6CalmSE3CalmCalmNE7NE8NE6E9E105E73
2 days agoN6N7NE4N3NW6NW6NW6N7NW8N7N6N10NW9NW9N11N7NW13NW10N8N12N9NW11N9N9

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.
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Wind Forecast for Denver/Boulder, CO (19,4,5,8)
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Ground Weather Radar Station Denver/Boulder, CO
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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 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 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.