Marine Weather and Tides
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 6:41AM||Sunset 5:45PM||Friday February 22, 2019 9:49 AM MST (16:49 UTC)||Moonrise 9:38PM||Moonset 8:51AM||Illumination 89%|
7 Day Forecast for Marine Location Near Sheridan, COHourly EDIT Help
Area Discussion for - Denver/Boulder, CO  (on/off)  Help NOTE: mouseover dotted underlined text for definition
|Fxus65 kbou 220950|
area forecast discussion
national weather service denver boulder co
250 am mst Fri feb 22 2019
Short term (today and tonight)
issued at 250 am mst Fri feb 22 2019
this morning, latest radar and METAR observations indicate light
snow in the mountains, foothills and urban corridor north of
denver. Elsewhere dense fog with some freezing drizzle. Most of
this handled with the current winter weather advisory that is
effect through this morning for the parts of the northeast plains.
Freezing drizzle and light snow impacting areas mainly north and
east of the i-76 corridor this morning, then freezing fog and
patchy freezing drizzle impacting the i-70 corridor. The models
indicate the upper level jet MAX that has helped produce the light
snow this morning will lift to the north and east. This should
result in decreasing snow coverage after 12z this morning.
This afternoon, the airmass will become increasingly unstable over
the mountains as the axis of the upper level trough starts to
shift eastward. The trough axis will make its way across the
region late this afternoon and tonight. Snow will increase in
coverage and intensity so will keep the winter weather advisory in
place for the zone 34 through this evening. Models generally show
weak mid level QG ascent this morning, with moderate QG ascent
developing with the passage of the main trough tonight. Strongest
lift associated with the trough will pass to the south of the cwa
For tonight, main issue will involve the heavy snow and strong
wind potential for the far eastern plains. Main concern will be
over zones 46 and 47 in closer proximity to the strengthening
surface low. The models show the strongest cyclogenesis near the
tx ok panhandles tonight. The eastern part of our CWA will be on
the fringe of the heaviest snow. At this time, will hold on to the
winter storm watch zones 046>051. North and west of the watch
area, snowfall amounts in the 1-3 inch range. Could see localized
bands of moderate snow drift off the foothills and across the
urban corridor and adjacent plains around 00z. Evening commute
could be impacted if this occurs. If confidence in this increases,
day shift may want to address with a possible winter weather
advisory when the morning highlights expire at noon.
Long term (Saturday through Thursday)
issued at 250 am mst Fri feb 22 2019
strong vertically stacked low should be near the oklahoma|
panhandle 12z Saturday. Expect snow and windy conditions to be
continuing into the early morning hours over the far eastern
plains. As this system lifts northeast, snow will end across the
eastern plains Saturday morning. In its wake, windy and cool
conditions will prevail for the rest of Saturday.
For Sunday and next week, a zonal pattern will prevail over most
of the continental u.S. There may light mountain snow from time to
time, but the lack of large scale features make timing snowfall
difficult. Temperature forecast will be tricky from Monday on.
There will be two surges of arctic air over the northern states.
Large temperature differences are expected across the area with
pacific air battling the arctic airmass just to the north. Models
favor Monday and Wednesday being the cooler days. Far northeast
colorado will likely remain in the 20s these days. On the warmer
days, Tuesday and Thursday, areas near the foothills will approach
Aviation (for the 06z tafs through 06z Friday night)
issued at 250 am mst Fri feb 22 2019
ifr conditions will likely prevail at kden through 14z this
morning with a gradual improvement the rest of the morning. Ifr
cigs at kbjc and kapa, but so far visiblities are above 1 mile.
Still expect those to drop to less than a mile at some point.
Still cannot rule out some light freezing drizzle. Conditions
should improve by midday, but after 22z bands of light to moderate
snow showers may develop off the foothills and shift eastward
across the terminals late this afternoon and evening. MVFR ifr cig
and vsby restrictions expected as the snow showers develop.
Bou watches warnings advisories
Winter weather advisory until noon mst today for coz042>044-
Winter storm watch from this evening through Saturday afternoon
Winter weather advisory until 11 pm mst this evening for coz034.
Short term... Cooper
long term... Meier
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
|Denver - Centennial Airport, CO||14 mi||56 min||S 5||7.00 mi||Overcast||22°F||19°F||89%||1013.7 hPa|
|Broomfield / Jeffco, CO||16 mi||64 min||NNE 5||0.50 mi||Sky Obscured||23°F||21°F||93%||1009.8 hPa|
|Buckley Air Force Base Airport, CO||17 mi||1.9 hrs||S 4||5.00 mi||Fog/Mist||23°F||22°F||100%||1013.1 hPa|
|Erie Municipal Airport, CO||23 mi||55 min||E 4||1.00 mi||Fog/Mist||22°F||21°F||96%||1012.5 hPa|
|Denver, Denver International Airport, CO||24 mi||56 min||ESE 9||0.25 mi||Light Snow Fog/Mist||23°F||21°F||96%||1013.3 hPa|
Wind History from APA (wind in knots)
|1 day ago||Calm||NW||SE||E||E||E|
|2 days ago||Calm||N||N||N||N||N||N||N||N||W||NW||W||S||S||S||SE||S||SE||SW||S||SE||S||S |
EDIT RT Ports Option Weekend mode (on/off) (on/off)  Help
EDIT (on/off)  Help
Weather Map and Satellite Images(on/off)  HelpWeather Map
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.
Link to Loop
Other links: Northern Pacific Contential US Full GOES-East
Wind Forecast for Denver/Boulder, CO (11,2,3,4)(on/off)  Help
Ad by Google
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.