Marine Weather and Tides
8/26/2020 The 7 day forecast is taking about 5 seconds to load but it will eventually load. NOAA is still working on it.
8/18/2020 NOAA continues to have trouble. Wind guest will occasionally be left off graphs. I am working with NOAA to resolve the issue.
12/16/2019 NOAA is having trouble with requests that include wind gusts. I am posting graphs without wind gusts until it gets fixed.
10/9/2019 Updated the Marine Zones.
9/4/2019 Fixed the weather maps due to NOAA moving them.
7/25/2019 New feature in the Airports section gives a link to 5 minute updates for data reports.
|Sunrise 6:58AM||Sunset 4:36PM||Friday November 27, 2020 9:39 PM MST (04:39 UTC)||Moonrise 4:23PM||Moonset 5:14AM||Illumination 95%|
7 Day Forecast for Marine Location Near Pierce, COHourly EDIT Help
Area Discussion for - Denver/Boulder, CO  (on/off)  Help NOTE: mouseover dotted underlined text for definition
FXUS65 KBOU 280205 AFDBOU
Area Forecast Discussion National Weather Service Denver/Boulder CO 705 PM MST Fri Nov 27 2020
UPDATE. Issued at 656 PM MST Fri Nov 27 2020
No changes to the grids at this time. Light winds at the surface and aloft. In the mid and upper level, a west to east oriented ridge axis will be along the CO/WY border overnight. This feature will build into the state on Saturday as the closed low to the south makes its way in the TX/OK panhandles Saturday afternoon.
SHORT TERM. (This evening through Saturday) Issued at 215 PM MST Fri Nov 27 2020
Water vapor shows a bowling ball of a cut off trough taking its time moving eastward through New Mexico. Dry air and subsident flow on the north side of this trough will keep conditions dry across our forecast area through tomorrow. Slight ridging will develop over our CWA tomorrow between the aforementioned trough and another trough moving across the Pacific Northwest. Warmer 700 mb temperatures associated with this ridge will lead to high temperatures increasing 5 to 10 degrees above today's highs. The only thing that may keep temperatures slightly cooler is the snow cover. Since temperatures continue to be slightly cooler than forecast over the snow cover across the plains, highs were lowered 2 to 3 degrees there. Otherwise, the light winds and sunny skies will make for a pleasant day.
LONG TERM. (Saturday night through Friday) Issued at 215 PM MST Fri Nov 27 2020
Monday night, the models begin to diverge. The GFS and GEM models depict an upper level trough dropping out of the northern Rockies into Colorado with increasing westerly flow aloft. while the ECMWF shows an upper low moving from the Pacific Northwest into western Utah.
For Tuesday and Wednesday the pattern gets much more complicated and uncertain with quite a bit of discrepancy between the models. The GFS and GEM models show a large upper level trough extending from the Southern Rockies north into Saskatchewan Canada with two distinct 500 mb low pressure centers. The GEM solution seems to be the deeper of the two solutions and develops a cutoff 500 mb low over extreme northeastern New Mexico by 00Z Wednesday. The upper low then slowly slides east across the Central Plains States by the end of the work week. This pattern would result in snow and much colder temperatures across the CWA along with breezy conditions across the plains and Palmer Divide.
The GFS solution shows the upper low further to the east over central Kansas by 12Z Wednesday with another low center over northeastern Wyoming. The upper low over Kansas slowly moves east on Wednesday with the other low pressure weakening as it elongates over Colorado and Utah. This pattern would bring much colder temperatures to the region with snow mainly in the high country. However, this solution does produce a period of light snow across Metro Denver Wednesday morning due to increased moisture and upslope flow.
On the other hand, the ECMWF shows Colorado between two large weather systems, one over the upper Midwest with the other tracking from southern Utah into northern Mexico. North Central and Northeastern Colorado would experience dry weather and cooler temperatures with this pattern from Tuesday through Thursday. With all of the uncertainty, have decided to go with the blended solutions for now. The only exception to this was adding a slight chance of pops to the foothills and adjacent plains Wednesday morning.
AVIATION. (For the 00Z TAFS through 00Z Saturday evening) Issued at 656 PM MST Fri Nov 27 2020
No operational impacts expected through Saturday afternoon. VFR with light winds at the surface and aloft. A weak cold front will move through the terminals late Saturday evening, with a northwest/north wind shift at that time.
BOU WATCHES/WARNINGS/ADVISORIES. None.
UPDATE . Cooper SHORT TERM . Danielson LONG TERM . jk AVIATION . Cooper
Weather Reporting StationsEDIT (on/off)  Help NOTE: Click on distance to see the station location on a map
Airport ReportsEDIT (on/off)  Help Click EDIT to display multiple airports. Follow links for more data.
|Fort Collins/Loveland - Northern Colorado Regional Airport, CO||18 mi||44 min||N 0||10.00 mi||Fair||30°F||21°F||69%||1024.9 hPa|
|Greeley, Greeley-Weld County Airport, CO||18 mi||44 min||N 4||10.00 mi||Fair||18°F||14°F||84%||1027.5 hPa|
Link to 5 minute data for KFNL
Wind History from FNL (wind in knots)
|1 day ago||SW||SW||Calm||S||SW||SW||Calm||SE||SW||SE||S||S||S||S||S||S||S||S||E||NE||NE||NE||SW||SW|
|2 days ago||S||SE||Calm||Calm||N||E||Calm||Calm||N||S||Calm||Calm||Calm||NW||Calm||Calm||SE||S||SE||E||N||N||N||SW |
EDIT Weekend mode (on/off) (on/off)  Help
EDIT (on/off)  Help
Weather Map(on/off)  Help Weather Map
GEOS 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.
Link to Loop
Other links: Northern Pacific Contential US Full GOES-East
I do not sell or share any user data or anything else for that matter. The only personal information I save is in the site log which has a line for each page view which includes the IP address your browser sends in the header as well as which page you requested. I use this to block hackers and other bad actors. I do not use this raw data to create profiles on users. I periodically delete the log files. Google supplies the ads on this site. Because I do not track who you are, I cannot customize how these ads are served. They may be personalized to improve the ad experience. If you do not want personalized ads, please adjust the settings on the Google site HERE. NOTE: The best I can determine, this site is not subject to CCPA but I am doing my best to comply anyway.
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 numerous 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.