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 7:18AM||Sunset 6:07PM||Tuesday October 23, 2018 10:53 AM MDT (16:53 UTC)||Moonrise 6:02PM||Moonset 5:58AM||Illumination 99%|
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 231625|
area forecast discussion
national weather service denver boulder co
1025 am mdt Tue oct 23 2018
Issued at 1025 am mdt Tue oct 23 2018
made a few slight adjustments to sky coverage to reflect current
conditions. Otherwise, forecast is in good shape. Still expect
scattered showers to form over the mountains this afternoon and
evening with a few possibly moving off the higher terrain.
Snowfall level will remain high, around 10000 feet msl with
amounts up to 4 inches possible.
Short term (today and tonight)
issued at 320 am mdt Tue oct 23 2018
goes-16 shows a short wave trough across northern utah which
continues to push northward. The weak forcing associated with the
trough was mainly across the western half of colorado, though
radar is confirming a few light showers are ongoing across the
higher terrain, with very little precipitation reaching the
ground. These showers are possible for a few more hours before the
trough moves further north. High res models have a good handle on
the evolution of this short wave trough.
As the utah short wave trough moves north into the northern
rockies, it will finally allow a second trough that had been
meandering across the desert southwest to impact colorado later
this evening. This trough should be more effective at generating
precipitation across our area starting this afternoon and
continuing into Wednesday morning. For the high country, moisture
and orographics look pretty good for the west slopes after sunset.
The trough is not particularly cold, and the snow level is
expected to only drop to around 10,000 feet later this evening,
then drop a bit more to maybe 9,500 feet by early Wednesday
morning. The trough contains a little dynamic lifting to aid the
west upslope, and so 1-4 inches are possible along the i-70 high
mountains and passes and across the mosquito range in park county.
Lift and moisture is less across the park and medicine bow
ranges, as well as the front range north of rocky mountain
national park. Thus not much snow is expected across the northern
ranges. With 700 mb temps well above freezing this afternoon, high
temperatures will be in the 50s in the elevations up to 9,000
feet, and mostly in the 40s above that. Temperatures will drop
some after sunset with diurnal cooling and some cold advection,
but not much colder than the mid 20s for the coldest spots,
especially given the ample cloud cover.
Across the plains, southerly low-level flow will result in
another warm day with highs expected in the mid to upper 60s.
Cloud cover will be much greater than yesterday, thus keeping
temps below 70 for a change. The dynamic lift from the short wave
trough, combined with weak instability (100-300 j kg) should be
enough to generate rain showers after sunset. Only an isolated
chance of thunder. QPF looks to be pretty light across the
plains, and the best chances of measurable precip seem to be along
and south of i-76 given the best forcing should be in those
areas, especially south of i-70. Weld and larimer counties may not
see much precipitation from this event given the track of the
short wave trough. Cloud cover tonight will keep lows in the 40s
across the plains.
Long term (Wednesday through Monday)
issued at 320 am mdt Tue oct 23 2018|
for Wednesday, the upper trough will be over the western portions of
the state moving east through the day. Mid level ascent along with
decent moisture will bring scattered precipitation mainly to the
plains through the early evening hours. Some light, lingering snow
showers will still be possible over the higher terrain but drying
behind the trough will move in and clear out precipitation by late
Wednesday evening. Conditions will be cloudy for much of the day
with highs in the lower 60s for the plains and 30s to 40s in the
high country. On Thursday, the ridge over the west coast will
strengthen bringing co under increase NW flow aloft. In this pattern
mid and high level moisture will increase. Models are hinting at a
disturbance embedded in the flow that could bring light rain and
snow to the mountains late Thursday into early Friday. Moisture is
weaker with this feature so do not expect much in the way of
accumulation at higher elevations with isolated showers most likely
for the mountains. Temperatures will increase slightly on Thursday
with highs in the upper 60s on the plains and 40s to low 50s in the
For Friday and into the weekend, the ridge that was over the west
coast deepens and starts to move over the SW portion of the conus.
Friday will remain dry with highs continuing to be above normal in
the upper 60s to possibly lower 70s on the plains. Model cross
sections showing some increased pressure gradients over the
mountains that could bring some gusts in the he 35 to 40 mph range
for Friday. For Saturday and Sunday NW flow over the state continues
as the upper ridge moves eastward into the great basin region and
into the tx panhandle. Flow will be dry so do not expect any
precipitation for the region. Highs will continue above average with
highs in the 70s Saturday. For Sunday, although the models stay dry,
the ec and GFS show a weak cold front moving down from the north
bringing a slight cool down for the region. Highs are currently
looking to be in the upper 50s to lower 60s range on the plains and
40s in the mountains.
Monday will see continued dry weather as the upper flow starts to
transition to a more zonal pattern. This is due to the deepening of
the next disturbance over the pacific that could bring weather later
in the week.
Aviation (for the 18z tafs through 18z Wednesday afternoon)
issued at 1025 am mdt Tue oct 23 2018
vfr conditions expected through tonight though clouds will be
increasing this afternoon and evening. By late evening overnight
expect an overcast deck around 060. A denver cyclone is once
again expected this afternoon. For kden and kapa, light winds are
expected to become southerly around or just after 00z. At bjc,
light northerly winds should occur. Winds may shift to the west
late tonight as the cyclone shifts off to the northeast.
Light rain showers are possible after 02z or 03z this evening at
all metro area terminals. The overall chance is less than 30
percent so left them out of the tafs for now, especially at den.
Slight chance of rain continues through about 12z. Rain showers
and low clouds are expected Wednesday morning east of the denver
area over eastern colorado.
Bou watches warnings advisories
short term... Schlatter
long term... Bowen
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|Greeley, Greeley-Weld County Airport, CO||37 mi||57 min||N 0||10.00 mi||Overcast||48°F||39°F||74%||1024.2 hPa|
Wind History from GXY (wind in knots)
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|2 days ago||SW||SW||S||SE||SE||S||SE||SE||SE||Calm||NE||NE||N||N||NW||NW||NW||N||N||Calm||Calm||W||S|
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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 (12,3,4,5)(on/off)  Help
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