Saturday, March25, 2017 L-36.com


Marine Weather and Tides
Denver, CO

Version 3.4
What's New / NOTES
5/19/2016 - There were issues with the 3 day airport observation history. I switched to another data source. Let me know if you see any issues with the data feeds.
3/12/2015 - Added section for Gulf current for users in the GMZ marine zones.
This was requested by a user. If you have requests, please let me know.

Sunrise 6:51AMSunset 7:18PM Saturday March 25, 2017 7:40 AM MDT (13:40 UTC) Moonrise 5:36AMMoonset 4:49PM Illumination 4% Phase: Waning Crescent; Moon at 28 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 Denver, CO
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location: 39.76, -104.88     debug


Area Discussion for - Denver/Boulder, CO
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Fxus65 kbou 251000
afdbou
area forecast discussion
national weather service denver/boulder co
400 am mdt Sat mar 25 2017

Short term (today and tonight)
issued at 350 am mdt Sat mar 25 2017
positive tilt upper ridge aligned with the crown of the colorado-
new mexico rockies early this morning is progged to migrate
eastward over the western great plains by this evening. Dry and
warmer air beneath this ridge will be in place over the forecast
area for most of the day. In the very short term... Mesoscale
models still indicate patchy to areas of fog on the plains during
the next 2-4 hours. However, have yet to see any fog on ir
satellite imagery or in sfc observations. Will reluctantly hold
on to the patchy fog east of the i-25 corridor for now. Otherwise
count on a dry day with a gradual increase in high clouds ahead
of an upper level trough now moving over western portions of the
great basin. Highs today will generally be 8-12 deg f warmer than
yesterday. Winds on the plains today should remain south-
southeasterly for the most part at speeds generally under 15 mph.

In the high country light southerly winds this morning are
projected to turn southwesterly and increase in speed this
afternoon in advance of the sfc cold front moving across nern
utah/srn wyoming by late this afternoon.

Models indicate a nearly solid band of light to moderate
precipitation along the frontal zone as it moves through western
colorado this evening. Increasing QG ascent and mid-level
instability within the warm sector of this trough could support
pockets of upright convection over the higher terrain around
summit and grand counties before midnight possibly resulting in
locally heavy snowfall. Snow level will start out high tonight... Up
around 10000-10500 ft asl... Then gradually fall to the mtn valley
floors after midnight with passage of the sfc cold front. Snow
totals overnight in the high country expected to range anywhere
from 1 to 4 inches. For the plains... Could see isolated to
scattered showers forming around midnight as the boundary layer
moistens with a gradual shift to northerly direction late.

Precipitation should be light starting out as rain and then late
tonight possibly change to a rain/snow mix below 6000 feet... And
perhaps to all snow on the cheyenne ridge and palmer divide with
sfc temps lowering to around 0 deg c.

Long term (Sunday through Friday)
issued at 350 am mdt Sat mar 25 2017
synoptic pattern change will help to bring increased chances of
moisture to the region through the period. For Sunday an upper
level trough will move across co through the day with a surface
low spinning over the se. There is decent moisture associated with
this feature that will bring snow to the mountains and rain on
the plains given the 700mb temperatures of -2 to -5c. Models
trends have the better lift to the south with the track of the qg
fields. Current amounts still looking 3 to 6 inches for the
mountains with higher amounts along the eastern slopes with .01 to
half an inch of rain for the plains. Temperatures will continue
to be slightly cooler then what we have seen with highs in the
lower 50s.

Monday will see some warning under a fast moving ridge between
systems. Conditions with be dry with highs in the 60s. Monday
night into Tuesday moisture will increase over western colorado
ahead of the next upper level feature that will be over the great
basin by 00z Tuesday. With the increased moisture and orographic
influence of the SW flow ahead of the trough snow will form at
higher elevations. Expect the heaviest to be over the central and
southern mountains given the northern mountains tend not to do as
well in this pattern. Current tracks of the closed low differ
between the GFS and ec with the euro a bit faster and deeper by
midnight Tuesday. As the low progresses into the nm area there
will be enough moisture and cooler air provided by the front
Tuesday afternoon to bring snow to the mountains with definite
rain and possibly snow to the plains. Will keep higher pops with
this system given model agreement but still low confidence on
amounts and track without more runs to verify consistency.

Temperatures will drop once again on Tuesday with the onset of
the frontal boundary with highs in the 50s. This could also change
with possible intrusion of cooler air.

The latter half of the week will dry out under another
transitional upper level ridge for Wednesday and Thursday.

Temperatures will rebound back into the 60s both days. For Friday
the models are showing another possible good precipitation maker
for the region but this far out all I will say is stay tuned.

Aviation (for the 06z tafs through 06z Saturday night)
issued at 350 am mdt Sat mar 25 2017
vfr conditions are expected at denver area air terminals for
today. South-southeast winds of 5-15 kts will prevail. Should see
a gradual increase in high clouds through the day... With possibly
a few mtn top standing wave clouds forming this afternoon. Tonight
clouds will increase ahead of a surface cold front and upper
level trough moving over western colorado. Could see CIGS lowering
to around 6000-7000 ft agl after midnight and a 30-40 percent
chance of rain showers. CIGS could lower even more to around
3000-4000 ft agl after 09z with rain possibly mixing with snow
towards sunrise as temperatures drop to near freezing. Little to
no snow accumulation is anticipated prior to 6 am mdt. Winds start
out south-southeast at 7-15kts early evening, then gradually
shift clockwise to west-northwest after midnight at speeds under
12 kts.

Bou watches/warnings/advisories
None.

Short term... Baker
long term... Bowen
aviation... Baker


Weather Reporting Stations
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Buckley Air Force Base Airport, CO7 mi1.7 hrsS 1010.00 miPartly Cloudy33°F27°F78%1016.7 hPa
Denver, Denver International Airport, CO13 mi48 minSSW 910.00 miPartly Cloudy32°F26°F79%1016.4 hPa
Denver - Centennial Airport, CO14 mi48 minSSE 610.00 miA Few Clouds32°F26°F79%1018 hPa
Broomfield / Jeffco, CO16 mi56 minN 030.00 miA Few Clouds36°F28°F75%1017.6 hPa
Denver Nexrad, CO18 mi54 minS 610.00 miPartly Cloudy32°F28°F87%1017.3 hPa
Erie Municipal Airport, CO19 mi47 minN 010.00 miFair27°F25°F94%1017.6 hPa

Wind History from BKF (wind in knots)
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Last 24hrN25
G38
N24
G30
N21
G29
N20
G30
N18N20
G26
NE14N15
G23
NE13NE12
G16
E8CalmS5S6S7S8S8S7S6S9S9S9S10S9
1 day agoS7S8SW14
G19
SW19
G29
SW19
G29
S12
G20
SW12
G18
SW21
G30
SW19
G32
S14W14
G20
W10N21
G29
N26
G39
N22
G34
N21
G34
N18
G26
N19
G34
N19
G24
N23
G30
N23
G30
N26
G35
N24
G35
N28
G35
2 days agoW4NW4CalmN6N6N11
G15
NE6N14N12
G17
N12N4SW6S12S15
G19
S11S14S17
G22
S15S10S12S13S10S11S12

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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Weather Map
wmap_P
IR Satellite Image from GEOS
west_satellite

GOES Local Image of CentralPlains    EDIT
Geos

Wind Forecast for Denver/Boulder, CO (9,2,3,4)
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Ground Weather Radar Station Denver/Boulder, CO
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Disclaimer:
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.