Marine Weather and Tides
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.
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 L-36.com. Allen
|Sunrise 7:13AM||Sunset 4:34PM||Sunday December 15, 2019 1:27 PM MST (20:27 UTC)||Moonrise 9:16PM||Moonset 11:19AM||Illumination 83%|
7 Day Forecast for Marine Location Near Raymer (New Raymer), COHourly EDIT Help
Area Discussion for - Denver/Boulder, CO  (on/off)  Help NOTE: mouseover dotted underlined text for definition
FXUS65 KBOU 151635 AFDBOU
Area Forecast Discussion National Weather Service Denver/Boulder CO 935 AM MST Sun Dec 15 2019
UPDATE. Issued at 921 AM MST Sun Dec 15 2019
Main change to the forecast today was to cancel the Winter Weather Advisory for South Park. Still expect light snow to spread from south to north across that area after 2 pm and continue through the evening. Marginal criteria might be met over the extreme southern fringe of that zone, but not elsewhere. Also made some minor adjustments to the pops in terms of timing and lowering them further over northern and eastern portions of the forecast area.
SHORT TERM. (Today and tonight) Issued at 259 AM MST Sun Dec 15 2019
An upper level disturbance will move across srn CO late today and tonight. Deepest moisture and best QG ascent with this feature will stay over southern Colorado. In fact, most models keep any significant snow south of the CWA. At this point, it appears any decent snow later today and tonight would be mainly over Park county. Meanwhile other areas south of I-70 will see scattered areas of light snow with amounts of an inch or less late this aftn and tonight. As far as highs will keep readings in the upper 20s to mid 30s across nern CO.
LONG TERM. (Monday through Saturday) Issued at 345 AM MST Sun Dec 15 2019
The shortwave trough responsible for bringing the southern half of our CWA snow today and tonight will move off into Kansas on Monday. A weaker shortwave trough will then move over northern Colorado during the day on Monday providing weak QG ascent. Some light snow showers will be possible mainly over the mountains but a few could also fall over the Denver metro and the Palmer Divide. Very little, if any, accumulation is expected from these showers. Otherwise, temperatures will be rather chilly with highs 10 to 15 degrees below normal. Across mountain ridges and passes, wind chills will reach the -20s.
On Tuesday, ridging will develop aloft over Colorado which will lead to dry conditions and temperatures warming about 5 degrees above Monday's highs. The axis of this ridge will be over our CWA on Wednesday with increasing downslope, westerly winds at the surface. Highs will warm 5 to 10 degrees above normal with continued dry conditions.
A moderately strong trough will move through Colorado on Thursday. Since this trough will be moisture starved, no precipitation is expected outside of a few flurries in the mountains. Winds will be gusty, especially in the mountains, with gusts up to 40 mph.
Strong ridging quickly develops on Friday and lasts through next weekend. Dry conditions are expected with temperatures potentially reaching well above normal.
AVIATION. (For the 18Z TAFS through 18Z Monday afternoon) Issued at 921 AM MST Sun Dec 15 2019
Overall expected VFR conditions through midday Monday. There is the potential for light snow late this afternoon and tonight, but much of this should remain south of the terminals. If it does slip further north, then could see some ILS restrictions with broken ceilings 050-060. Generally light winds (under 10 kts) shifting to the northeast this afternoon then back to a southerly drainage overnight.
BOU WATCHES/WARNINGS/ADVISORIES. None.
UPDATE . Cooper SHORT TERM . RPK LONG TERM . Danielson 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.
|Greeley, Greeley-Weld County Airport, CO||37 mi||32 min||N 0||10.00 mi||Fair||32°F||14°F||47%||1016.7 hPa|
Link to 5 minute data for KGXY
Wind History from GXY (wind in knots)
|1 day ago||NW|
|2 days ago||Calm||Calm||Calm||Calm||Calm||W||N||W||SW||NW||NE||SW||E||Calm||Calm||W||W||W|
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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
Wind Forecast for Denver/Boulder, CO (15,3,4,5)(on/off)  Help
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