Marine Weather and Tides
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 6:01AM||Sunset 8:10PM||Thursday August 6, 2020 6:45 PM MDT (00:45 UTC)||Moonrise 10:10PM||Moonset 8:51AM||Illumination 91%|
7 Day Forecast for Marine Location Near Nunn, COHourly EDIT Help
Area Discussion for - Denver/Boulder, CO  (on/off)  Help NOTE: mouseover dotted underlined text for definition
FXUS65 KBOU 061849 AFDBOU
Area Forecast Discussion National Weather Service Denver/Boulder CO 1249 PM MDT Thu Aug 6 2020
SHORT TERM. (This evening through Friday) Issued at 1231 PM MDT Thu Aug 6 2020
Water vapor satellite imagery showing very dry air over the Great Basin and Desert southwest. Southwest flow around the upper level ridge center over the region will transport this drier air into Colorado. However, ahead of it, there will be one last round of afternoon and early evening showers and thunderstorms. The airmass has dried a little already along the Front Range and near by plains. Because of this, MLCAPE is less the 500 J/kg. These storms will be capable of brief moderate to heavy rain and gusty outflow winds to 50 mph. As these storms progress eastward, they will encounter better moisture that resides east of a surface trough. Here, MLCAPE is around 1500 J/kg. Weak shear should keep most of these storms sub- severe, but heavy rain, small hail, and gusty outflow winds will accompany the stronger storms. Can't rule out a couple brief severe storms with large hail and wind gusts to 60 mph. The convection continues to progress eastward through the evening will be east of the state by midnight.
Skies will clear overnight as the drier air spreads across the state. On Friday, clear to mostly clear skies will prevail through the day. With precipitable water values less than a half inch, don't expect any showers and thunderstorms during the afternoon. At best, expect a few to scattered high based cumulus clouds. Because of the drier airmass and increased sunshine, expected warmer temperatures. Highs across northeast Colorado should reach the mid to upper 90s.
LONG TERM. (Friday night through Thursday) Issued at 1231 PM MDT Thu Aug 6 2020
The longer term is going to be characterized with hot and mainly dry conditions through the early part of next week. Temperatures will be in the 90s across the plains with only slight chances of late day storm, mainly mountains and far northeast plains.
Colorado will return to a drier west and southwest flow aloft with high pressure ridge aloft covering much of the southern portions of the United States. Friday evening looks completely dry across the county warning area with mainly clear skies.
For Saturday, mostly dry, though the NAM showing a weak frontal boundary which may flirt across the far northeast plains with a bit higher low level moisture there. Park county may be the other area which has a shot of a late day storm with a some increase in moisture from the southwest. If showers do develop over the mountains expect mainly high based showers with gusty winds the main threat. Sunday looks very similar to Saturday with only an ever so slight chance for a late day storm in mountains south of Interstate 70 corridor.
Not much change into the middle of next week with light westerly flow with only slight chance of late day storms and continued very warm to hot conditions. Possibly a bit better moisture available towards the end of next week with better moisture available with more favorable flow from the southwest.
AVIATION. (For the 18Z TAFS through 18Z Friday afternoon) Issued at 1231 PM MDT Thu Aug 6 2020
Scattered showers and thunderstorms will continue form and track eastward this afternoon. Gusty outflow winds, brief moderate to heavy rain, and small hail are expected with the strongest storms. A couple wind shifts due to the gusty outflow winds are expected. The showers and storms should push east of the Denver area by 00Z with southeast winds prevailing behind the convection. Winds eventually become southerly by 06Z. For Friday, mostly clear skies are expected due to a very dry airmass.
FIRE WEATHER. Issued at 1231 PM MDT Thu Aug 6 2020
Very warm and dry conditions will prevail this afternoon and again Friday afternoon. Relative humidities are expected to bottom out in the 5 to 12 percent range over the mountains and mountain valleys. Winds in the 500-700mb layer still less than 20 knots each day, so expect wind gusts to stay below the 25 mph need for Red Flag criteria. A few gusts to 30 to 40 mph will be possible with the showers and thunderstorms this afternoon. For Friday, no showers or storms are expected due to the very dry airmass.
There will be elevated fire danger over the weekend with dry conditons over North and Middle Parks but lack of any strong winds will keep conditions at a manageable level with afternoon breezes mainly around/under 20 mph.
BOU WATCHES/WARNINGS/ADVISORIES. None.
SHORT TERM . Meier LONG TERM . Entrekin AVIATION . Meier FIRE WEATHER . Meier
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.
|Fort Collins/Loveland - Northern Colorado Regional Airport, CO||16 mi||49 min||SSE 11 G 18||10.00 mi||Fair||86°F||50°F||29%||1007.5 hPa|
|Greeley, Greeley-Weld County Airport, CO||21 mi||49 min||ESE 5||10.00 mi||Fair||90°F||46°F||23%||1008.8 hPa|
Link to 5 minute data for KFNL
Wind History from FNL (wind in knots)
|1 day ago||N||NW||E||NE||E||W||N||N||Calm||S||S||NW||SW||SW||S||E||SE||N||N|
|2 days ago||S||E||E||E|
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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 (20,4,5,8)(on/off)  Help
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