Saturday, August18, 2018

Marine Weather and Tides
Nunn, CO

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Sunrise 6:13AMSunset 7:54PM Saturday August 18, 2018 10:32 AM MDT (16:32 UTC) Moonrise 2:11PMMoonset 12:00AM Illumination 47% Phase: First Quarter Moon; Moon at 7 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 Nunn, CO
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location: 40.66, -104.88     debug

Area Discussion for - Denver/Boulder, CO
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Fxus65 kbou 181526
area forecast discussion
national weather service denver boulder co
926 am mdt Sat aug 18 2018

Issued at 856 am mdt Sat aug 18 2018
water vapor imagery showing upper level trof moving across
northwest colorado this morning with associated cold front now
approaching the continental divide. Local radar also showing a
band of rain showers moving into the mountains now. This line of
storm will progressively move east over the urban corridor
between 11 am and noon and over the eastern plains this afternoon.

Expect storms to intensify as they move east of the front range
and encounter better low level moisture and more time for daytime
heating. Expect a few of these storms to become severe over the
plains with hail and damaging winds and expect the main impact
may be outflow driven winds up to 70 mph. Current forecast has the
earlier timing expected today so minimal changes needed to
current forecast.

Short term (today and tonight)
issued at 249 am mdt Sat aug 18 2018
an upper level trough centered over idaho will move across
wyoming today and by 12z Sunday strengthen into a closed low over
the nebraska panhandle. Ahead of the main trough low, a short wave
trough will pass through colorado today. Satellite and radar
showing a broken line of showers and thunderstorms with this
feature over western wyoming and utah. This trough and convection
will move into western colorado early this morning. Showers and
storms shift into the north central mountains mid to late morning
and then onto the urban corridor around or shortly after noon.

Hrrr shows a good blast of wind (40 knots) coming down the
foothills with the convection. These downslope winds could limit
convection across the urban corridor. As the trough moves onto the
eastern plains, it will encounter greater moisture and
instability with CAPE values of 1000- 2000 j kg. A few severe
storms will be possible with wind gusts up to 70 mph and hail to
one inch in diameter. A solid line of showers and storms should
develop to the east of the urban corridor mid to late afternoon.

By early evening, this activity is expected to be east of the

The left exit region of the jet moves over north central colorado
this evening. This may provide enough lift for additional showers
and thunderstorms mid to late evening and possibly continuing
after midnight.

Long term (Sunday through Friday)
issued at 249 am mdt Sat aug 18 2018
on Sunday morning, a closed upper low will be over the nebraska
panhandle. This feature will shift to the southeast with a
moderate to stronger northerly flow aloft Sunday afternoon. The
models generally show the best QPF in proximity to the upper low.

Overall the best chance of showers will be through 21z Sunday
along the eastern border. Only light and more isolated shower
coverage is expected further west. Temperatures will be cooler
with highs only in the lower 70s for denver. In addition, a
stronger north to south surface pressure gradient, and decent
flow aloft will allow for gusty bora winds in the late
morning afternoon period. Some gusts in the 40 to 45 mph range
will be possible over northeast plains. The upper level ridge will
build over the region Sunday night into Monday, with clearing
skies and cool overnight temperatures. Not much in store for
Monday with a dry northwesterly flow in place. Temperatures will
warm slightly, but remain below normal as they struggle to reach
80. A strong northwesterly flow will remain over the CWA on
Tuesday, with an embedded short wave trough dropping out of the
northern rockies and clipping the northeast corner of the state
Tuesday night around 06z. Both the gfs20 and ECMWF are similar in
the timing and track of this system, with isolated to scattered
pops reflected in the grids at that time, highest in the mountains
north of i-70 and over the northeast corner of the state.

Wednesday through Saturday, temperatures will warm back to normals
with highs in the mid to upper 80s. The upper ridge will build
over the region a bit more with more of a westerly flow aloft over
colorado. Still enough subtropical moisture around, with another
potential short wave trough brushing across the region on Thursday.

Will generally keep isolated pops in the grids each day with
isolated to scattered pops possible on Thursday with the passage
of the short wave.

Aviation (for the 12z tafs through 12z Sunday morning)
issued at 856 am mdt Sat aug 18 2018
expect a line of showers and thunderstorms to move across the
terminals between 18-20z with brief heavy rain and winds. Appear
main impact will be the winds with this line of storms and
certainly could see gusts in the 30-40kt range. More isolated
coverage mid to late afternoon. The upper trof will deepen into a
closed circulation later tonight and result in additional storms
and showers this evening and over night. There is also indication
of low clouds developing later tonight and Sunday and will address
this for the 18z taf.

Bou watches warnings advisories

Update... Entrekin
short term... Meier
long term... Cooper
aviation... Entrekin

Weather Reporting Stations
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Fort Collins/Loveland - Northern Colorado Regional Airport, CO16 mi37 minN 310.00 miFair68°F55°F65%1015.4 hPa
Greeley, Greeley-Weld County Airport, CO21 mi37 minNNW 510.00 miFair71°F60°F68%1016.7 hPa

Wind History from FNL (wind in knots)
Last 24hr3SW54W6SW8CalmCalmE9SE8SE13SW4S8S3S3SE5E6NE4N4CalmN5N4N8N4N3
1 day ago3SE8S9S9E7S8S7S5CalmCalmSE6SE4N4N6N7N8N9N7N5N6N6N7N8N7
2 days agoCalmS54SE10CalmE14

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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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.
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Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for Denver/Boulder, CO (12,3,4,5)
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Ground Weather Radar Station Cheyenne, WY
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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 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 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.