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Marine Weather and Tides
Version 3.4 |
7/25/2019 New feature in the Airports section gives a link to 5 minute updates for data reports. 6/2/2019. Many thanks to a user for reporting an error on one of the Edit pages. The switch to PHP 7.2 caused many pages that previously worked to quit working. I fixed many but I still depend on users to report ones I missed. Please report errors HERE or send an email to me at L-36.com. Allen |
| Sunrise 6:14AM | Sunset 7:49PM | Wednesday August 21, 2019 6:16 PM MDT (00:16 UTC) | Moonrise 11:03PM | Moonset 11:52AM | Illumination 62% |  |
7 Day Forecast for Marine Location Near Raymer (New Raymer), CO
Hourly EDIT Helplocation: 40.66, -104 debug
Area Discussion for - Denver/Boulder, CO
(on/off) Help NOTE: mouseover dotted underlined text for definition| Fxus65 kbou 212042 afdbou area forecast discussion national weather service denver boulder co 242 pm mdt Wed aug 21 2019 Short term (this evening through Thursday) issued at 221 pm mdt Wed aug 21 2019 east winds around a large surface high over the great lakes will help keep low level moisture across northeast colorado. Dew points are expected to stay in the mid to upper 50s with precipitable water values around an inch. With surface temperatures in mid 80s, surface based capes are 1500-2500 j kg. The 12z sounding at dnr and amdar soundings show a strong cap around 650mb. Storms are expected to continue to form over the mountains and foothills where they should be able to bust through the cap. Storms are then expected to slowly track east-southeast. Models indicate storms will have a tough time surviving north of i-70 and east of line from akron to limon because of the cap. Lowered pops over the northeast corner, but kept 40-60 pops for the front range and near by plains. Some of the storms should be strong to severe with hail, strong winds, and very heavy rain. Convection is expected to end by 06z as the airmass stabilizes. On Thursday, an upper level trough will move into the northern rockies. This will turn flow aloft southwesterly and bring drier air to the mountains. There may be enough lift to produce a few week showers and storms over the mountains. Models show an area of convergence somewhere along the front range to the near by plains. This should help trigger storms. Ml CAPE climbs to 1500-3000 j kg over the front range and eastern plains Thursday afternoon. Southeast winds will be stronger over the plains and result in better shear. This should lead to a few of the storms to be strong to severe with large hail, damaging winds, and heavy rain. Temperatures are expected to be slightly warmer with highs in the mid to upper 80s across northeast colorado. Long term (Thursday night through Wednesday) issued at 221 pm mdt Wed aug 21 2019 further disorganization and weakening of the summer subtropical ridge will take place over the weekend as the supply of mid and upper level moisture to the rockies essentially gets shut off by dry northwesterly flow aloft. Hot and dry conditions are expected for the weekend and into early next week ahead of potentially much cooler temps for NE colorado for the middle to latter portion of next week. Potential critical fire weather concerns may exist for Sunday and Monday. Starting with Thursday evening, the weak ridge axis over the state Thursday will flatten into early Friday as a pacific short wave trough treks over the northern us rockies along the us canada border. This will leave the state under drier, moderate westerly zonal flow aloft. This trough will send southward the first of three cooler surges to northeast colorado in the extended period. By midday Friday this cool front, associated with the northern trough, will enter the northeast plains. At this time the front looks nothing more than a strong northerly wind shift while aiding to keeping temps slightly cooler in the 80s across the lower elevations. Would also expect a lower cloud deck to develop over the plains for late Friday night into early Saturday under stable west-northwestly flow aloft. For Saturday, with dry conditions in the mid and upper levels, this cooler morning airmass should be a stabilizing feature for much of the day, however temps will quickly rebound back into the 90s as the boundary layer mixes with dry and warm mid-level temps by midday. Heading into Sunday, as the upper trough which brought the cooler surge moves across the northern us plains states, slight strengthening of the upper ridge develops over the entire western |
us in it's wake. This will allow for moderate to strong dry northwestly flow aloft to dominate the state. This should bring a hint of a dry, blue-sky, septemberlike day to the region Sunday. This ridge should also fend off any northerly advection of tropical moisture out of the baja region from tropical depressing ten-e which is projected to move northwestward well off the baja coast. Will need to monitor potential critical fire weather concerns for Sunday as low rhs and potentially stronger northwestly winds are likely, especially across the mountains and foothills. As moderate northwest flow dominates the rockies, another weak impulse of energy rides southeastward across the northern us plains states behind a closed upper low over southern manitoba. This will force another slightly cooler wind shift onto NE co late Monday into early Tuesday. With the dry ridge continuing to dominate the rockies, will keep pops in the isolated category with gusty afternoon storms Tuesday. Any critical fire weather concerns on Sunday will also be there for Monday as potential dry and gusty conditions may be present ahead of this late Monday, early Tuesday surge, especially over the higher terrain. With a dominant deep upper trough projected to hold over se canada into mid-week, the third and coolest surge of the extended spreads onto the high plains, including eastern co, late Tuesday into early Wednesday. This surge, forced southward from strong northwesterly flow aloft over southern canada and the northern us, may bring daytime highs down into the 70s for Wednesday along with the potential for higher pops. This is far off in time, but if this upper pattern over N america materializes, the potential for cooler temps across the northern states and high plains states may increase for this mid to late next week timeframe. Aviation (for the 18z tafs through 18z Thursday afternoon) issued at 221 pm mdt Wed aug 21 2019 scattered thunderstorms are expected to form over the foothills this afternoon and spread east through the early evening hours. Best chance for den to see thunderstorms will be 00z to 04z. For kbjc and kapa the best chance will be slightly sooner 23z to 03z. Large hail, winds to 50 knots, and heavy rainfall will accompany the stronger storms. Easterly winds are expected to continue through 00z with gusts up to 20 knots. Outflow winds from nearby thunderstorms will produce a wind shift or two at the denver airports. Once convection ends this evening, winds will settle at a southerly drainage direction at kapa and kden. Low clouds are expected to form over eastern colorado with ceilings of 1000-3000 feet. There is a slight chance these low clouds make it far enough west to impact kden. Fire weather Issued at 221 pm mdt Wed aug 21 2019 elevated fire danger conditions may materialize for Sunday and Monday. Dry and stable conditions under moderate northwesterly flow aloft are expected in this timeframe. At his time, the main areas set for potential critical fire conditions would be the mountains, high parks and eastern foothills as afternoon winds over 25 mph combined with low relative humidities may develop. Bou watches warnings advisories None. Short term... Meier long term... Fredin aviation... Meier fire weather... Fredin |
Weather Reporting Stations
EDIT (on/off) Help NOTE: Click on distance to see the station location on a mapAirport Reports
EDIT (on/off) Help Click EDIT to display multiple airports. Follow links for more data.| Airport | Dist | Age | Wind kt | Visibility | Sky/Weather | Temp | DewPt | Humidity | Pressure |
| Greeley, Greeley-Weld County Airport, CO | 37 mi | 80 min | ESE 9 | 10.00 mi | 81°F | 59°F | 47% | 1015.3 hPa | |
Link to 5 minute data for KGXY
Wind History from GXY (wind in knots)
| 7 PM | 8 PM | 9 PM | 10 PM | 11 PM | 12 AM | 1 AM | 2 AM | 3 AM | 4 AM | 5 AM | 6 AM | 7 AM | 8 AM | 9 AM | 10 AM | 11 AM | 12 PM | 1 PM | 2 PM | 3 PM | 4 PM | 5 PM | 6 PM | |
| Last 24hr | E G20 | NE | N | N | NW | S | S | SW | S | SE | S | SE | S | SE | E | |||||||||
| 1 day ago | S | E | N | N | N | W | W | Calm | Calm | SW | SW | SW | E | SE | NE G23 | E | ||||||||
| 2 days ago | Calm | N | N | NE | N | N | N | W | W | S | W | Calm | S | W |
Tide / Current Tables for
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GOES 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)
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Ground Weather Radar Station Cheyenne, WY
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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 numerious 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. |