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 5:32AM||Sunset 8:21PM||Tuesday May 26, 2020 11:23 PM MDT (05:23 UTC)||Moonrise 8:46AM||Moonset 12:00AM||Illumination 25%|
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 270147 AFDBOU
Area Forecast Discussion National Weather Service Denver/Boulder CO 747 PM MDT Tue May 26 2020
UPDATE. Issued at 747 PM MDT Tue May 26 2020
Pretty quiet evening with scattered to broken mid level clouds passing across the forecast area. Perhaps a couple of sprinkles in the mountains. Most of the clouds will be clearing overnight, with pleasant temperatures and light winds expected. On Wednesday, we'll see moisture gradually increase as the ridge axis shifts east and a weak cold front drops across the plains. Forecast for scattered shower and storm coverage looks good, with most of it holding off until late afternoon or evening for the I-25 Corridor and plains. Gusty winds and brief moderate rainfall expected for the most part given limited CAPE under 500 J/kg and DCAPE near 1000 J/kg.
SHORT TERM. (This evening through Wednesday) Issued at 224 PM MDT Tue May 26 2020
A ridge of high pressure will keep a dry and subsident airmass over the forecast area tonight. On Wednesday, the ridge will shift slightly to the south and east, as a weak disturbance moves across WY/northern CO in the afternoon. Scattered showers and thunderstorms will develop over the mountains of Jackson/Larimer counties, then shift to the southeast in the afternoon. Surface winds will become northwest as a weak frontal boundary passes across northeast CO. RAP20 soundings show inverted-v type soundings. ML CAPES range from 300 j/kg in Denver to 800 j/kg around Ft Collins. DCAPE 800-1100 j/kg. Consequently the main threat from the storms would appear to be strong wind gusts up to 45 mph and brief light/moderate rainfall. In terms of timing, it looks like the storms will not make it to the far eastern zones (46,47,48>51) until Wednesday evening.
LONG TERM. (Wednesday night through Tuesday) Issued at 224 PM MDT Tue May 26 2020
A short wave trough passing to the north of Colorado will bring scattered showers and thunderstorms Wednesday evening. Some of the showers are expected to linger overnight. A cold front drops south across eastern Colorado early Thursday morning. Northeast winds behind it will usher in cooler and more stable air. There will be a chance for showers and thunderstorms over the mountains and higher foothills where it will be above the inversion. Due to northerly winds aloft, storms are expected to travel southward. This should keep convection confined to the higher terrain Thursday afternoon and evening.
An intensifying upper level ridge over the Desert Southwest will move eastward Friday and on Saturday the center of the ridge progresses east across Colorado. This ridge will bring warmer temperatures. By Saturday, highs will be approaching 90F across northeast Colorado. Models indicate subtropical moisture will lift north under the ridge and over Colorado. Convection Friday is expected to be isolated to scattered. On Saturday, convection expected to be scattered with the best chance over the higher terrain and near by plains.
For Sunday and early next week, the upper level ridge will very slowly inch eastward across the Southern/Central Plains and then into the southeast part of the country. Out west, a large upper level trough will be along the west coast and over the western states. This will put Colorado under a south to southwest flow aloft. Warm temperatures will prevail under this pattern with highs in the upper 80s to lower 90s expected through the weekend and into Tuesday. Models differ on the amount of moisture that will be lifted northward. The GFS is very robust and has scattered to numerous showers and thunderstorms Saturday through Tuesday. The ECMWF has daily convection as well, but not as much. Best chance for storms will be over and near the higher terrain. With steering winds pushing storms to the north to northeast, the storms may have a tough time making it to eastern Colorado.
AVIATION. (For the 00Z TAFS through 00Z Wednesday evening) Issued at 747 PM MDT Tue May 26 2020
VFR conditions expected through Wednesday. Next concern will be for gusty outflow winds from showers and a couple storms late Wednesday afternoon and evening. Any chance will likely be after 21Z-22Z, with the best chance 00Z-04Z. Gusty outflow winds to 30-35 knots the main threat, and enough threat to put TEMPO gusty winds in the TAFS for this period. Outside of that, south/southwest winds tonight will likely turn northeasterly toward 15Z Wednesday, and then northeasterly toward 19-20Z. Speeds mostly 10 knots or less.
BOU WATCHES/WARNINGS/ADVISORIES. None.
UPDATE . Barjenbruch SHORT TERM . Cooper LONG TERM . Meier AVIATION . Barjenbruch
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||18 mi||27 min||SE 10||10.00 mi||Mostly Cloudy||66°F||37°F||36%||1012.3 hPa|
|Greeley, Greeley-Weld County Airport, CO||18 mi||27 min||ESE 3||10.00 mi||Mostly Cloudy||60°F||42°F||52%||1014.5 hPa|
Link to 5 minute data for KFNL
Wind History from FNL (wind in knots)
|1 day ago||SE||N||NE||N||N||NE||N||Calm||NW||Calm||Calm||SW||Calm||SW||S||S||Calm||SE|
|2 days ago||N|
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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 (1,6,7,8)(on/off)  Help
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