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 8:22PM||Sunday May 31, 2020 11:56 AM MDT (17:56 UTC)||Moonrise 2:30PM||Moonset 2:37AM||Illumination 72%|
7 Day Forecast for Marine Location Near Foxfield, COHourly EDIT Help
Area Discussion for - Denver/Boulder, CO  (on/off)  Help NOTE: mouseover dotted underlined text for definition
FXUS65 KBOU 311554 AFDBOU
Area Forecast Discussion National Weather Service Denver/Boulder CO 954 AM MDT Sun May 31 2020
UPDATE. Issued at 946 AM MDT Sun May 31 2020
Current satellite imagery shows CU slowly starting to develop over the higher terrain with upper level flow mainly from the southwest behind the exiting trough. Dewpoints are slightly lower than yesterday with the morning sounding showing PW values a tenth of an inch lower than yesterday. This will provide for slightly lower CAPE values but with less mid level warming we could still see scattered storms into the evening hours. Model soundings still indicate with the increased low level drying that isolated severe wind gusts appear possible along with periods of moderate rain.
SHORT TERM. (Today and tonight) Issued at 406 AM MDT Sun May 31 2020
Clouds have been slow to dissipate, but are starting to fade now. The drying from the west anticipated for today is clearly going to be slower, and the latest model runs are picking up on this, with drying/clearing working into the mountains but not really until this evening. So again it turns out today will not be much different from yesterday. The air mass will be a little warmer, and surface dew points should be a bit lower but mainly just from the mixing that occurred yesterday and again this afternoon. We should get a decent amount of cloud cover from the mountain convection before late afternoon, which will likely keep us from hitting 90 in Denver. As far as storm type and coverage, it may be more like Friday or halfway between Friday and Saturday, with pretty good coverage over the Front Range, but storms struggling to survive on the plains, eventually helped by outflow convergence by early evening. CAPEs should be a little less than yesterday, perhaps around 1000 J/kg at most on the plains, but we may be a bit less capped at the end of the day. Still a minor severe threat, but will less CAPE and similar shear the threat may be a bit more wind, less hail and heavy rain, and more likely storms will stay below severe limits.
Overall, we just made minor adjustments to the going forecast for convective timing and more clouds overall and a degree or two cooler this afternoon.
LONG TERM. (Monday through Saturday) Issued at 406 AM MDT Sun May 31 2020
Temperatures will remain above normal through Saturday. Monday and Tuesday will warm to around 90, with an upper ridge over the central/southern plains, and a weak south to southwesterly flow aloft over the forecast area. Enough subtropical moisture continues to advect northward into CO to produce thunderstorms in the afternoon and evening. Best chance of thunderstorms will continue to be over the mountains, with isolated to scattered thunderstorms developing over the plains in the late in the day. The threat of severe thunderstorms should remain low, with gusty outflow winds and locally heavy rainfall the main threats. On Wednesday, the flow will be more westerly as a weak upper level disturbance brushes the state from the north. Not much impact from this system except slightly cooler (but still above normal) temperatures on Wednesday. The southerly flow aloft will reestablish itself over the state by the end of the week with the ridge axis over the Southern Plains. A closed upper low over southern CA Thursday night, is still progged to lift northeast across CO Friday night. The short wave trough will lift north of the state by 12z Saturday, with a drier southwesterly flow aloft in its wave for the weekend. Pops over the weekend are more isolated.
AVIATION. (For the 18Z TAFS through 18Z Monday afternoon) Issued at 946 AM MDT Sun May 31 2020
VFR conditions will prevail through tonight. Scattered thunderstorms will form over the higher terrain and push eastward between the hours of 23 and 03z. At this time confidence of thunderstorms at DEN are below 50% so have kept them out of the current TAF. However, outflow wind gusts up to 30 kts will be possible most likely from the southwest after 23z with thunderstorms in the vicinity. APA and BJC could see some isolated storms over the terminals with heavy rain and gusty winds a possibility. Localized MVFR visibilities and brief wind gusts to 40 knots are possible during that time.
BOU WATCHES/WARNINGS/ADVISORIES. None.
UPDATE . Bowen SHORT TERM . Gimmestad LONG TERM . Cooper AVIATION . Bowen
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.
|Denver - Centennial Airport, CO||6 mi||64 min||NNW 6||10.00 mi||Partly Cloudy||81°F||45°F||28%||1013.1 hPa|
|Buckley Air Force Base Airport, CO||7 mi||2 hrs||WSW 3||10.00 mi||Mostly Cloudy||73°F||51°F||47%||1013.7 hPa|
|Denver, Denver International Airport, CO||16 mi||64 min||WSW 5||10.00 mi||Mostly Cloudy||78°F||55°F||45%||1011.8 hPa|
Link to 5 minute data for KAPA
Wind History from APA (wind in knots)
|1 day ago||S||S|
|2 days ago||NE||NE||N||NE||E||E||NE||NE||NE||S||S||S||S||S||S||SW||Calm||SW||W||NW||NW |
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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 (13,3,4,5)(on/off)  Help
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