Marine Weather and Tides
3/30/2021 -- ANZ330 has been split into ANZ331 and ANZ332. Click EDIT in Marine Forecast and select your new zone.
1/26/2021 -- The West Coast Satellite images havd been updated. They now use GEOS-17.
1/1/2021 -- The 7 day forecast are now working well. Thank you NOAA for your support.
|Sunrise 5:27AM||Sunset 8:32PM||Saturday June 12, 2021 8:00 AM MDT (14:00 UTC)||Moonrise 7:05AM||Moonset 10:47PM||Illumination 6%|
7 Day Forecast for Marine Location Near Pierce, COHourly EDIT Help
Area Discussion for - Denver/Boulder, CO  (on/off)  Help NOTE: mouseover dotted underlined text for definition
FXUS65 KBOU 121032 AFDBOU
Area Forecast Discussion National Weather Service Denver/Boulder CO 432 AM MDT Sat Jun 12 2021
SHORT TERM. (Today and tonight) Issued at 254 AM MDT Sat Jun 12 2021
Upper level ridge will begin to build over the Central and Southern Rockies today. Temperatures at 700mb warm 4-6C today. Expect highs to be about 10F warmer than yesterday. This will put most locations across northeast Colorado in the upper 80s to lower 90s. Skies will be cloud free this morning with the dry airmass remaining in place. Should see cumulus clouds form this afternoon over the higher terrain, most of them will be south of Interstate 70. Surface high pressure off to the east will help produce gusty southeast winds late this afternoon and evening over eastern Colorado. This will help increase low level moisture. Moisture continues to advect into the area tonight with low clouds possible towards sunrise Sunday morning over the far eastern plains.
LONG TERM. (Sunday through Friday) Issued at 254 AM MDT Sat Jun 12 2021
Hot and dry conditions will persist through the week as a large ridge builds over the Rockies. Record breaking afternoon highs are possible Tuesday through Thursday. Isolated thunderstorms will be possible but convection will often be limited due to capping by subsidence and warm air aloft. Storm severity will also be limited by a lack of shear due to weak winds under the ridge.
The warming trend will continue Sunday with afternoon high temperatures into the low to mid 90s on the plains and mid to upper 80s in the mountains. Expect isolated thunderstorms in the afternoon and evening as good low level moisture is capped by low to moderate CIN, with low severe potential due to weak shear and moderate lapse rates east of the Front Range. Monday will be slightly warmer than Sunday, but convection will probably be more limited by further warming aloft as well.
The warmest temperatures of the period, and the greatest potential for record breaking heat, are expected on Tuesday and Wednesday with highs on the plains reaching the mid to upper 90s. MOS guidance and ensemble output are trending warmer and with low variance, which makes sense given the general predictability of the pattern. These tools are indicating the potential for 100 degree or greater highs in many areas of the plains, especially in the South Platte River Valley, and including Denver. Isolated thunderstorms will be possible Wednesday mostly over the Front Range, with still low severe potential.
Thursday should see slightly cooler temperatures as the ridge flattens out a bit. Cooling should then be accelerated by a cold front on Friday, with highs down to the 80s. Increasing mid level moisture Thursday through the weekend should also mean increasing storm coverage.
AVIATION. (For the 06Z TAFS through 06Z Saturday night) Issued at 254 AM MDT Sat Jun 12 2021
VFR conditions will prevail through tonight under mostly clear skies. Southerly winds this morning will become light and variable after 12Z as winds turn clockwise. Around 18Z, east to southeast winds are expected to prevail and continue through Saturday evening. Southeast winds increase around 00Z with gusts up to 30 knots possible.
HYDROLOGY. Issued at 254 AM MDT Sat Jun 12 2021
Isolated storms are possible over the Front Range Sunday which may affect burn areas, but the threat of significant rainfall is still quite low. Mainly dry weather is expected most of the week, with only isolated storm threats through Thursday. By Friday, increasing moisture should lead to stronger storms with greater rainfall.
BOU WATCHES/WARNINGS/ADVISORIES. None.
SHORT TERM . Meier LONG TERM . EJD AVIATION . Meier HYDROLOGY . EJD
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|Fort Collins/Loveland - Northern Colorado Regional Airport, CO||18 mi||64 min||N 6||10.00 mi||A Few Clouds||53°F||43°F||69%||1016.5 hPa|
|Greeley, Greeley-Weld County Airport, CO||18 mi||64 min||N 0||10.00 mi||Fair||54°F||41°F||62%||1018.5 hPa|
Link to 5 minute data for KFNL
Wind History from FNL (wind in knots)
|1 day ago||N||N||N||Calm||Calm||SE||S||SE||SE|
|2 days ago||Calm||SE||S||S||Calm||SE||SW||S||S||SE||S||SE||SE||SE||SW||Calm||E||Calm||NW||N||N||NW||N |
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