Sunday, August25, 2019

Marine Weather and Tides
Nunn, CO

Version 3.4
7/25/2019 New feature in the Airports section gives a link to 5 minute updates for data reports.
6/2/2019. Many thanks to a user for reporting an error on one of the Edit pages. The switch to PHP 7.2 caused many pages that previously worked to quit working. I fixed many but I still depend on users to report ones I missed. Please report errors HERE or send an email to me at Allen

Sunrise 6:18AMSunset 7:47PM Saturday August 24, 2019 11:41 PM MDT (05:41 UTC) Moonrise 12:13AMMoonset 3:03PM Illumination 28% Phase: Waning Crescent; Moon at 24 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 Nunn, CO
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location: 40.66, -104.88     debug

Area Discussion for - Denver/Boulder, CO
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Fxus65 kbou 250252
area forecast discussion
national weather service denver boulder co
852 pm mdt Sat aug 24 2019

Issued at 852 pm mdt Sat aug 24 2019
an upper level ridge keeps building over the state through
tomorrow with a warm and dry airmass remaining in place.

Additional warming is expected through tomorrow due to the
moderate to strong downsloping westerly flow across the forecast
area. Other than warm, late summer temperatures, no other weather
is expected, and no changes to the forecast are necessary this

Short term (this evening through Sunday)
issued at 114 pm mdt Sat aug 24 2019
water vapor showing upper trof axis has shifted southeast into
the far northeast corner of colorado this afternoon with building
ridge of higher pressure upstream. QG fields showing increasing
subsident flow over the northeast plains by this evening so not
expecting any thunderstorms over the county warning area tonight.

Further west towards the mountains, fair amount of mountain wave
clouds this afternoon with decent gusty winds over the higher
mountains passes with gusts in the 40-50 mph range up on berthoud
pass today. Cloud cover has also kept temperatures a bit cooler
today, more in the lower 80s so far this afternoon.

Sunday will be characterized by a dry and moderate northwest flow
regime across colorado. Main concerns will be the high fire
danger, which will be addressed below with gusty winds and low
humidities over mountains and higher terrain areas. Temperatures
will warm considerably by Sunday afternoon with readings climbing
well into the mid upper 90s as 700mb temperatures rise to around
+19c. The record for denver is 99 degrees, so may be a degree or
2 shy. Forecast soundings show a dry airmass over the region with
warming aloft and no chance for thunderstorms in the county
warning area. Airmass will become well mixed by Sunday afternoon
with gusty winds in the mountains and plains. Cross sections showing
continue potential wind gusts of 30 to 50 mph over mountain passes.

Long term (Sunday night through Saturday)
issued at 300 pm mdt Sat aug 24 2019
a big pattern change will begin to take place on Sunday night lasting
through the middle of the work week. This pattern will feature a
strong longwave trough over the northern great plains with a
surface cyclone over souther canada. The GEFS has the 500 mb
heights in this trough at the minimum in the database over the
north dakota area on Tuesday to give an idea of the strength and
cold air associated with this trough. At the surface, a series of
cold fronts will move through eastern colorado with the first
arriving early Monday morning. This will cool high temperatures to
the upper 70s and low 80s across the plains Monday afternoon. A
longmont anticyclone will develop with strong northwest winds
across the cheyenne ridge and northeast winds over the palmer
divide. The slight upslope flow over the palmer divide could
develop a shower or two Monday afternoon but there will be a
strong mid level inversion which will greatly limit any shower

Another cold front will push through the area on Tuesday with even
cooler air behind it. High were decreased to the 70s over the
plains since there will likely be some cloudiness during the day.

Showers and perhaps a weak thunderstorm will be possible along
this front especially if the front comes through during the
afternoon peak heating.

The trough will continue to move eastward on Wednesday with an
upper level ridge building over the southwest us. Downslope flow
over our CWA will allow temperatures to climb slightly above
normal with dry conditions. Weak shortwaves will move around the
northern extent of this ridge on Thursday and Friday bringing a
chance for scattered thunderstorms. Highs will be above normal and
denver may get back into the 90s.

Aviation (for the 00z tafs through 00z Sunday evening)
issued at 852 pm mdt Sat aug 24 2019
no aviation impacts expected overnight and tomorrow with ceilings
and visibilities unlimited, or nearly so. Winds will be drainage
southerlies overnight and westerly to northwesterly tomorrow.

Fire weather
Issued at 114 pm mdt Sat aug 24 2019
fire danger will be increasing by Sunday afternoon over the
mountains and higher terrain towards the wyoming border. Minimum
humidity levels will be dropping below 15 percent while mountain
wind gusts expected in the 30 to 50 mph range during the
afternoon. Will be upgrading the fire weather watch to a red flag
warning for current areas. High mountains will be windy but
humidities will be above 20 percent so won't have any flags raised

Bou watches warnings advisories
Red flag warning from 11 am to 8 pm mdt Sunday for coz211-

Update... Dankers
short term... Entrekin
long term... Danielson
aviation... Dankers
fire weather... Entrekin

Weather Reporting Stations
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Fort Collins/Loveland - Northern Colorado Regional Airport, CO16 mi3.8 hrsESE 910.00 miFair78°F43°F29%1010 hPa
Greeley, Greeley-Weld County Airport, CO21 mi3.8 hrsESE 810.00 mi74°F54°F50%1011.9 hPa

Link to 5 minute data for KFNL

Wind History from FNL (wind in knots)
Last 24hrN8N5NE6CalmNW5E5NE3N6N5CalmE4SE8S6S4645S8SW7CalmSE9SE9N4N5
1 day agoS7SW6SW6CalmN7NE4N5N5NE10NE7NE6NE8N6E7SE6SW6SE8E3S7
2 days agoNE11N8N7E3E7E9SE11SE7SW3CalmCalmS6SE7E7

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 CentralPlains    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.
Link to Loop

Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for Denver/Boulder, CO (1,6,7,8)
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Ground Weather Radar Station Cheyenne, WY
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weather_mapweather_map weather_map

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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.