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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 7:04AM | Sunset 7:54PM | Saturday August 24, 2019 1:42 AM EDT (05:42 UTC) | Moonrise 12:07AM | Moonset 1:48PM | Illumination 38% |  |
GMZ043 Expires:201908240830;;112727 Fzus52 Kkey 240221 Cwfkey Coastal Waters Forecast For The Florida Keys National Weather Service Key West Fl 1021 Pm Edt Fri Aug 23 2019 Florida Bay...hawk Channel And Straits Of Florida From Ocean Reef To South Of Dry Tortugas...and The Extreme Southeastern Gulf Of Mexico...including The Florida Keys National Marine Sanctuary Seas Are Given As Significant Wave Height...which Is The Average Height Of The Highest 1/3 Of The Waves. Individual Waves May Be More Than Twice The Significant Wave Height. Gmz042>044-240830- Hawk Channel From Ocean Reef To Craig Key Out To The Reef- Hawk Channel From Craig Key To West End Of Seven Mile Bridge Out To The Reef- Hawk Channel From West End Of Seven Mile Bridge To Halfmoon Shoal Out To The Reef- 1021 Pm Edt Fri Aug 23 2019
Overnight..Variable winds 5 to 10 knots, becoming south to southwest near 10 knots. Seas 1 to 2 feet. NEarshore waters smooth to a light chop, becoming a light chop. Scattered showers and isolated Thunderstorms.
Saturday..Southwest winds 5 to 10 knots. Seas around 1 foot. NEarshore waters smooth to a light chop. Scattered showers and isolated Thunderstorms.
Saturday night..South to southwest winds 5 to 10 knots. Seas around 1 foot. NEarshore waters smooth to a light chop. Scattered showers and isolated Thunderstorms.
Sunday..Southwest winds 5 to 10 knots. Seas around 1 foot. NEarshore waters smooth to a light chop. Scattered showers and isolated Thunderstorms.
Sunday night..South winds 5 to 10 knots. Seas around 1 foot. NEarshore waters smooth to a light chop. Scattered showers and isolated Thunderstorms.
Monday..South to southwest winds 5 to 10 knots. Seas around 1 foot. NEarshore waters smooth to a light chop. Scattered showers and isolated Thunderstorms.
Monday night..Southeast to south winds 5 to 10 knots. Seas around 1 foot. NEarshore waters smooth to a light chop. Scattered showers and isolated Thunderstorms.
Tuesday..Variable winds near 5 knots. Seas 1 foot or less. NEarshore waters smooth. Scattered showers and isolated Thunderstorms.
Tuesday night..Variable winds near 5 knots. Seas 1 foot or less. NEarshore waters smooth. Scattered showers and isolated Thunderstorms.
Wednesday..Variable winds near 5 knots. Seas 1 foot or less. NEarshore waters smooth. Scattered showers and isolated Thunderstorms.
Wednesday night..Northwest winds near 5 knots. Seas near 1. NEarshore waters smooth. Scattered showers and isolated Thunderstorms.
Overnight..Variable winds 5 to 10 knots, becoming south to southwest near 10 knots. Seas 1 to 2 feet. NEarshore waters smooth to a light chop, becoming a light chop. Scattered showers and isolated Thunderstorms.
Saturday..Southwest winds 5 to 10 knots. Seas around 1 foot. NEarshore waters smooth to a light chop. Scattered showers and isolated Thunderstorms.
Saturday night..South to southwest winds 5 to 10 knots. Seas around 1 foot. NEarshore waters smooth to a light chop. Scattered showers and isolated Thunderstorms.
Sunday..Southwest winds 5 to 10 knots. Seas around 1 foot. NEarshore waters smooth to a light chop. Scattered showers and isolated Thunderstorms.
Sunday night..South winds 5 to 10 knots. Seas around 1 foot. NEarshore waters smooth to a light chop. Scattered showers and isolated Thunderstorms.
Monday..South to southwest winds 5 to 10 knots. Seas around 1 foot. NEarshore waters smooth to a light chop. Scattered showers and isolated Thunderstorms.
Monday night..Southeast to south winds 5 to 10 knots. Seas around 1 foot. NEarshore waters smooth to a light chop. Scattered showers and isolated Thunderstorms.
Tuesday..Variable winds near 5 knots. Seas 1 foot or less. NEarshore waters smooth. Scattered showers and isolated Thunderstorms.
Tuesday night..Variable winds near 5 knots. Seas 1 foot or less. NEarshore waters smooth. Scattered showers and isolated Thunderstorms.
Wednesday..Variable winds near 5 knots. Seas 1 foot or less. NEarshore waters smooth. Scattered showers and isolated Thunderstorms.
Wednesday night..Northwest winds near 5 knots. Seas near 1. NEarshore waters smooth. Scattered showers and isolated Thunderstorms.
7 Day Forecast for Marine Location Near Marathon, FL
Hourly EDIT Helplocation: 24.73, -81.03 debug
Area Discussion for - Key West, FL
(on/off) Help NOTE: mouseover dotted underlined text for definition| Fxus62 kkey 240242 afdkey area forecast discussion national weather service key west fl 1042 pm edt Fri aug 23 2019 Discussion A broad area of low pressure has moved west over southeast florida with a rotation still noted near miami. Radar imagery from both the miami and key west radars show that most of the convection from earlier in the day has dissipated with the exception along and just offshore of miami proper. Surface observations show that the trough axis lies over florida bay and the middle keys. Middle keys upper keys and surrounding waters, the winds have become southwest, while the lower keys and surrounding waters winds remain from the northwest to north. This area of low pressure will continue to slowly trek northwestward for the overnight and winds will eventually shift to the southwest across the entire island chain. Best chances for precipitation will remain in the upper keys and surrounding coastal waters. Only minor changes were made to the wording in the coastal forecast for the overnight period, otherwise forecast remains on track. Marine A disorganized low pressure system will continue to track northwestward across south florida through the overnight and into Saturday. This feature will then lift out northeastward late in the weekend into early next week. As a result, winds will start out light and wrapping cyclonically around the low then become a more uniform light to gentle south to southwesterly through the weekend. Thereafter, ridging will lift northward towards the keys, behind the departing low, but then break down. This will leave light and variable winds across the area. Aviation Vfr will prevail at the eyw and mth terminals overnight as a broad and disorganized low pressure system lumbers northwest from near south florida. Variable low-level steering will become confluent and southwesterly Saturday. Given the lower pressure, ample moisture, and vertical profile favorable for congestus along the island chain, there are good chances for afternoon thunderstorm impacts at both terminals. For now we have only included vicinity mentions, although periods of MVFR CIGS ifr vis will be possible with convective wind gusts near 25 knots. |
Tropical A broad area of low pressure located near the coast of southeastern florida continues to produce a large area of showers and thunderstorms that extend eastward over the northern bahamas and the adjacent western atlantic waters. The system has changed little in organization since this afternoon, but environmental conditions are expected to be conducive for gradual development, and a tropical depression is likely to form over the weekend. The low is forecast to move generally northwestward near or over southeastern florida through tonight, and then move northward to northeastward over the atlantic near the east coast of central florida on Saturday. After that, the system is expected to move northeastward offshore of the southeastern united states coast. Regardless of development, locally heavy rains are possible over the northwestern bahamas and the southern and central florida peninsula through the weekend. Interests in the northwestern bahamas, the florida peninsula, and the southeast coast of the united states should monitor the progress of this system. An air force reserve hurricane hunter aircraft is scheduled to investigate the system on Saturday, if necessary. Formation chance through 48 hours... High... 70 percent. Formation chance through 5 days... High... 90 percent. Satellite imagery suggests that the circulation associated with an area of low pressure located about 1100 miles east-southeast of the windward islands has become better defined, but the thunderstorm activity is limited at this time. Environmental conditions appear conducive for additional development, and a tropical depression is likely to form over the weekend or early next week while it moves generally westward to west-northwestward near 15 mph. Formation chance through 48 hours... Medium... 60 percent. Formation chance through 5 days... High... 70 percent. Key watches warnings advisories Fl... None. Gm... None. Public marine fire... Liw aviation nowcasts... .Clr data collection... ... Sd visit us on the web at weather.Gov key follow us on facebook and twitter at: |
Weather Reporting Stations
EDIT (on/off) Help NOTE: Click on distance to see the station location on a mapWind History for Vaca Key, FL
(wind in knots) EDIT (on/off) Help| Last 24hr | ||||||||||||||||||||||||
| 1 day ago | ||||||||||||||||||||||||
| 2 days ago |
Airport 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 |
| The Florida Keys - Marathon International Airport, FL | 1 mi | 3.8 hrs | W 4 | 10.00 mi | Fair | 85°F | 75°F | 75% | 1012.9 hPa |
Link to 5 minute data for KMTH
Wind History from MTH (wind in knots)
| 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 | 7 PM | 8 PM | 9 PM | 10 PM | |
| Last 24hr | N | N | N | N | N | N | N | W | NW | NW | E | NW | W | |||||||||||
| 1 day ago | E | Calm | N | N | NW | NE | NE | NE | ||||||||||||||||
| 2 days ago | SE | E | SE | SE | SW | S | SE | E | E | E |
Tide / Current Tables for Vaca Key-Fat Deer Key bridge, Florida
EDIT Weekend mode (on/off) (on/off) Help One Week of DataVaca Key-Fat Deer Key bridge
Click for Map
Sat -- 01:06 AM EDT Moonrise
Sat -- 02:56 AM EDT 1.74 feet High Tide
Sat -- 07:02 AM EDT Sunrise
Sat -- 10:51 AM EDT 0.29 feet Low Tide
Sat -- 02:48 PM EDT Moonset
Sat -- 04:58 PM EDT 1.09 feet High Tide
Sat -- 07:50 PM EDT Sunset
Sat -- 09:41 PM EDT 0.62 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Click for Map
Sat -- 01:06 AM EDT Moonrise
Sat -- 02:56 AM EDT 1.74 feet High Tide
Sat -- 07:02 AM EDT Sunrise
Sat -- 10:51 AM EDT 0.29 feet Low Tide
Sat -- 02:48 PM EDT Moonset
Sat -- 04:58 PM EDT 1.09 feet High Tide
Sat -- 07:50 PM EDT Sunset
Sat -- 09:41 PM EDT 0.62 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
| 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 | 7 pm | 8 pm | 9 pm | 10 pm | 11 pm |
| 1.2 | 1.5 | 1.7 | 1.7 | 1.7 | 1.5 | 1.3 | 1 | 0.7 | 0.5 | 0.3 | 0.3 | 0.4 | 0.6 | 0.7 | 0.9 | 1 | 1.1 | 1 | 0.9 | 0.8 | 0.7 | 0.6 | 0.7 |
Tide / Current Tables for Moser Channel (swingbridge), Florida Current
EDIT (on/off) Help One Week of DataMoser Channel (swingbridge)
Click for Map
Sat -- 01:07 AM EDT Moonrise
Sat -- 01:14 AM EDT 0.00 knots Slack
Sat -- 03:21 AM EDT 0.70 knots Max Flood
Sat -- 06:02 AM EDT -0.00 knots Slack
Sat -- 07:02 AM EDT Sunrise
Sat -- 10:01 AM EDT -1.63 knots Max Ebb
Sat -- 01:43 PM EDT 0.00 knots Slack
Sat -- 02:49 PM EDT Moonset
Sat -- 04:27 PM EDT 1.19 knots Max Flood
Sat -- 07:51 PM EDT Sunset
Sat -- 08:13 PM EDT -0.00 knots Slack
Sat -- 11:05 PM EDT -1.13 knots Max Ebb
Tide / Current data from XTide NOT FOR NAVIGATION
Click for Map
Sat -- 01:07 AM EDT Moonrise
Sat -- 01:14 AM EDT 0.00 knots Slack
Sat -- 03:21 AM EDT 0.70 knots Max Flood
Sat -- 06:02 AM EDT -0.00 knots Slack
Sat -- 07:02 AM EDT Sunrise
Sat -- 10:01 AM EDT -1.63 knots Max Ebb
Sat -- 01:43 PM EDT 0.00 knots Slack
Sat -- 02:49 PM EDT Moonset
Sat -- 04:27 PM EDT 1.19 knots Max Flood
Sat -- 07:51 PM EDT Sunset
Sat -- 08:13 PM EDT -0.00 knots Slack
Sat -- 11:05 PM EDT -1.13 knots Max Ebb
Tide / Current data from XTide NOT FOR NAVIGATION
| 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 | 7 pm | 8 pm | 9 pm | 10 pm | 11 pm |
| -0.6 | -0.1 | 0.4 | 0.7 | 0.6 | 0.4 | 0 | -0.4 | -1 | -1.4 | -1.6 | -1.5 | -1.1 | -0.5 | 0.2 | 0.8 | 1.2 | 1.2 | 1 | 0.7 | 0.1 | -0.5 | -1 | -1.1 |
Weather Map and Satellite Images
(on/off) HelpWeather Map
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 Key West, FL (1,6,7,8)
(on/off) Help
Ground Weather Radar Station Key West, FL
(on/off) Help
Gulf Stream Current
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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. |