Sunday, July5, 2020
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Marine Weather and Tides
Denver, CO

Version 3.4
NOTICE
12/16/2019 NOAA is having trouble with requests that include wind gusts. I am posting graphs without wind gusts until it gets fixed.
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.

Sunrise 5:36AMSunset 8:31PM Sunday July 5, 2020 2:59 PM MDT (20:59 UTC) Moonrise 9:21PMMoonset 5:54AM Illumination 100% Phase: Full Moon; Moon at 15 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 051718 AFDBOU

Area Forecast Discussion National Weather Service Denver/Boulder CO 1118 AM MDT Sun Jul 5 2020

UPDATE. Issued at 1115 AM MDT Sun Jul 5 2020

Convective cloudiness is beginning to develop over the mountains and higher foothills. There are no echoes on the area radars yet. Today's convection will start later than yesterday's. Current precipitable water values are lower across the CWA compared to yesterday at this time. Models show weak downward vertical motion on the QG Omega fields for the CWA this afternoon and evening. Current pops are okay for now. Will adjust some wind grids in GFE.

SHORT TERM. (Today and tonight) Issued at 335 AM MDT Sun Jul 5 2020

As an upper disturbance continues to sink south across southeastern Colorado, an upper level ridge will reestablish itself over the state. Drier air will be over the forecast area with precipitable water values about 1/4 to 1/3 of an inch lower than yesterday's readings. Expect similar temperatures and CAPE values slightly less, around 800 to 1000 J/kg, compared to yesterday. This will result in scattered showers and thunderstorms, starting a bit later in the day compared to yesterday without the extra lift from the disturbance. Storms will fire off the high terrain just after noon, then take their time to spread across the urban corridor late afternoon to early evening, continuing over the eastern plains this evening. With loss of moisture, expect mostly light rain, lightning and gusty outflow winds to be the main hazards from storms. A few stronger storms may see severe strength windspeeds, mainly east of the I-25 corridor and north of I-70. As they travel further east where better moisture resides, could see better rain amounts and some small hail.

Storms will die off and exit the area to the southeast this evening, done by midnight. Lows will be similar to this morning's readings, but a degree or two cooler due to drier air working its way in from the west.

LONG TERM. (Monday through Saturday) Issued at 335 AM MDT Sun Jul 5 2020

. Hot and dry weather will be the rule for much of the upcoming week .

Monday will see a continuation of slight drying aloft with a little more westerly component on the northern periphery of the building subtropical ridge over the Desert Southwest. However, there will still be sufficient moisture to produce isolated to scattered afternoon storms, with the highest coverage over the elevated terrain of the mountains, Palmer Divide, and Cheyenne Ridge. There should also be a little more coverage along a surface convergence zone stretching from the Palmer Divide east/northeast onto the plains. That should be enough to provide a little focus and a couple slightly stronger storms there - enough to produce brief heavy rain and gusty winds. No severe weather is expected as MLCAPE is under 1000 J/kg in a weakly sheared environment.

On Tuesday, the flow aloft will strengthen as a shortwave trough kicks out of the deep Pacific Northwest trough, and moves across the northern Rockies. This flattens the ridge a bit, resulting in further downslope and warming. Highs should reach the mid to upper 90s across all of the plains. We should still see isolated afternoon convection thanks to strong solar insolation, and low level moisture convergence along a developing lee trough. Points just east/southeast of Denver would be most favored for any high based storms with brief rain and gusty winds. Fire danger will increase Tuesday and remain elevated through the week - see more details in the Fire Weather section below.

By Wednesday, the drier air aloft will take hold and likely prevent any convection from developing. High temperatures will likely warm a couple more degrees, with a few spots (lower elevations) touching 100F on the plains under mostly sunny skies.

By Thursday, we may see a weak backdoor cool front/moisture surge out of storms in Nebraska. So, perhaps a couple degrees cooling along with a chance of isolated storms over the northeast plains. Otherwise, not much change expected.

If you don't like heat, it's not looking good for Friday into next weekend as high temperatures will have potential to reach the 100F degree mark in Denver. That, of course, depends on the evolution of the subtropical high over the Desert Southwest and whether or not we'd be open to any slight cooling from any convective complexes over the Central Plains. Right now, the ensembles are suggesting a flatter ridge and thus hotter and drier conditions than what the operational GFS would suggest. That would keep fire danger elevated and not much chance of precipitation until perhaps late in the weekend or early next week.

AVIATION. (For the 18Z TAFS through 18Z Monday afternoon) Issued at 1115 AM MDT Sun Jul 5 2020

Models keep a southerly component to the low level winds are DIA through this evening when they go right back to normal drainage patters. Thunderstorms in the vicinity could alter that direction. Gusts to 40 knots are possible wit the storms. There shouldn't be any ceiling issues this afternoon through overnight.

FIRE WEATHER. Issued at 335 AM MDT Sun Jul 5 2020

Hot temperatures and low humidity readings developing over the area by Tuesday and remaining in place through the rest of the week will bring an extended period of elevated fire danger. Winds are expected to increase a little Tuesday, with conditions approaching Red Flag criteria in the high mountain valleys. Those conditions will likely persist through the end of the week with the weather pattern changing very little.

BOU WATCHES/WARNINGS/ADVISORIES. None.

UPDATE . RJK SHORT TERM . Kriederman LONG TERM . Barjenbruch AVIATION . RJK FIRE WEATHER . Barjenbruch


Weather Reporting Stations
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Buckley Air Force Base Airport, CO7 mi2 hrsSSE 310.00 miPartly Cloudy85°F46°F26%1013 hPa
Denver, Denver International Airport, CO13 mi66 minS 9 G 1810.00 miPartly Cloudy90°F46°F22%1010.6 hPa
Denver - Centennial Airport, CO14 mi66 minVar 310.00 miPartly Cloudy89°F43°F20%1012 hPa
Broomfield / Jeffco, CO16 mi72 minS 720.00 miMostly Cloudy90°F41°F18%1020.3 hPa
Erie Municipal Airport, CO19 mi66 minN 010.00 miFair88°F37°F17%1020.3 hPa

Link to 5 minute data for KBKF

Wind History from BKF (wind in knots)
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Last 24hrS7N10
G30
E10E5SE12SW7SW5E12S9S7S9S12SE10S9S10S8SW5SW7SW5S4S7SE7SE3E6
G16
1 day agoNW10S14S15S20
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S14S11SW8S11SW6CalmNE4E8N5N4
2 days agoS8
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SE13S10SW6SW7SW8W10CalmCalmCalmNE9CalmN4

Tide / Current Tables for
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Tide / Current Tables for
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Weather Map
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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.
Link to Loop

Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for Denver/Boulder, CO (16,3,4,5)
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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 numerous 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.