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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 7:02AM | Sunset 7:59PM | Monday August 19, 2019 12:18 PM EDT (16:18 UTC) | Moonrise 9:39PM | Moonset 9:19AM | Illumination 83% |  |
GMZ043 Expires:201908192030;;469391 Fzus52 Kkey 191430 Cwfkey Coastal Waters Forecast For The Florida Keys National Weather Service Key West Fl 1030 Am Edt Mon Aug 19 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>044-192030- 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- 1030 Am Edt Mon Aug 19 2019
.small craft should exercise caution...
This afternoon..Northeast to east winds 15 to 20 knots. Seas 2 to 5 feet. NEarshore waters choppy. Isolated showers and Thunderstorms.
Tonight..East to southeast winds near 15 knots. Seas 2 to 3 feet. NEarshore waters a moderate chop. Scattered showers and Thunderstorms.
Tuesday and Tuesday night..East to southeast winds 10 to 15 knots. Seas 2 to 3 feet. NEarshore waters a light to moderate chop. Scattered showers and Thunderstorms.
Wednesday..East to southeast winds near 10 knots. Seas 1 to 2 feet. NEarshore waters a light chop. Scattered showers and Thunderstorms.
Wednesday night..East winds near 10 knots. Seas 1 to 2 feet. NEarshore waters a light chop. Scattered showers and Thunderstorms.
Thursday..East winds 10 to 15 knots. Seas 1 to 2 feet. NEarshore waters a light to moderate chop. Scattered showers and Thunderstorms.
Thursday night..Northeast to east winds 10 to 15 knots. Seas 1 to 2 feet. NEarshore waters a light to moderate chop. Scattered showers and Thunderstorms.
Friday and Friday night..East to southeast winds near 10 knots. Seas 1 to 2 feet. NEarshore waters a light chop. Scattered showers and Thunderstorms.
.small craft should exercise caution...
This afternoon..Northeast to east winds 15 to 20 knots. Seas 2 to 5 feet. NEarshore waters choppy. Isolated showers and Thunderstorms.
Tonight..East to southeast winds near 15 knots. Seas 2 to 3 feet. NEarshore waters a moderate chop. Scattered showers and Thunderstorms.
Tuesday and Tuesday night..East to southeast winds 10 to 15 knots. Seas 2 to 3 feet. NEarshore waters a light to moderate chop. Scattered showers and Thunderstorms.
Wednesday..East to southeast winds near 10 knots. Seas 1 to 2 feet. NEarshore waters a light chop. Scattered showers and Thunderstorms.
Wednesday night..East winds near 10 knots. Seas 1 to 2 feet. NEarshore waters a light chop. Scattered showers and Thunderstorms.
Thursday..East winds 10 to 15 knots. Seas 1 to 2 feet. NEarshore waters a light to moderate chop. Scattered showers and Thunderstorms.
Thursday night..Northeast to east winds 10 to 15 knots. Seas 1 to 2 feet. NEarshore waters a light to moderate chop. Scattered showers and Thunderstorms.
Friday and Friday night..East to southeast winds near 10 knots. Seas 1 to 2 feet. NEarshore waters a light chop. Scattered showers and Thunderstorms.
7 Day Forecast for Marine Location Near Duck Key, FL
Hourly EDIT Helplocation: 24.79, -80.88 debug
Area Discussion for - Key West, FL
(on/off) Help NOTE: mouseover dotted underlined text for definition| Fxus62 kkey 191427 afdkey area forecast discussion national weather service key west fl 1027 am edt Mon aug 19 2019 Discussion In the middle and upper levels(700-200 mb), latest available satellite imagery overlaid with model streamline analysis as of 900 am, depicts the center of a deep and warm anticyclone located over northern old mexico with an attendant east to west oriented ridge extending across the breadth of the gulf to across central florida. Another middle and upper ridge is located across the western atlantic near 37n 65w with its attendant axis extending southwest to just east of north carolina. South of that a weak nne-ssw aligned (tutt) tropical upper troposheric trough axis was positioned from the northern bahamas to across central cuba. At the surface and in the lower to middle levels(surface to 700 mb), latest available marine and land surface observations and analysis as of 900 am, details the axis of a 1020 mb surface ridge from the central atlantic near 30n 55w extending to across northern florida. Across the tropics, an inverted trough tropical wave is positioned between eleuthera and andros island. Upstream of that, another tropical wave is positioned near the mona passage. Latest sal (saharan air analysis) from university of wisconsin along with goes-16 tpw as of 12z revealed that the last vestiges of a drier lower to middle level airmass with pwat averaging 1.5 inches encompasses much of the keys and immediate surrounding waters attm, though the leading edge of the near and plus 2.00 inches of pwat also associated with that wave are nearing the cay sal bank. The 12z sounding at keyw illustrated pwat at 1.55 inches, with a moderate to mostly fresh northeast to east flow from just off the surface up to almost 500 mb, and plenty of drier air still mixing in from above 850 to 500 mb. Currently As of 900 am, skies are mostly sunny across the islands and all surrounding waters. Temperatures across the islands have already risen into the upper 80s with dewpoints in the upper 70s. Radar detects just a few quickly moving low topped showers near the island chain, with isolated showers and thunderstorms more confined to the aforementioned approaching higher moisture over the cay sal bank. Available marine platforms are measuring winds near 15 knots with gusts over 20 knots across the florida reef and at smith shoal light. Short term The end of the rare mini-sal induced weather pattern |
is coming to an end as the leading edge of deeper moisture and an associated inverted trough tropical wave approach from the east during this evening. For today ample middle level drier air will mix down allowing for only isolated showers and perhaps a thunderstorm over the islands. The leading edge of a greater concentration of scattered showers and thunderstorms associated with the approaching tropical wave will move into the upper florida keys later in the afternoon spreading eastward during the evening. The mslp gradient will also remain near breezy to breezy outside of any convection on account of the differences between the atlantic ridging and the approaching inverted trough wave. Given the drier air, lowered rain chances to 20%, isolated for all of the keys, but a high chance for showers and storms is indicated for this evening, but will be looking at that more closely as there are signs that showers may become more numerous, constituting likely wording for the overnight package, more on that later. Marine Will issue scec for all of the florida straits, hawk channel, and across gmz033-034 thru the afternoon given the aforementioned gradient. May continue to experience 15 to 20 knots outside of showers and storms this evening but will revisit that during the afternoon package. Mariners will likely encounter wind gusts near or exceeding 25 or 30 knots in any stronger fast moving showers or thunderstorms. Aviation The main concern through sunset will be isolated showers occasionally passing near or possibly over the island terminals. Showers will be moving to the west at 15-20 knots today, so the the sub-vfr conditions with any showers should be in and out of the terminals quickly. Vcsh in the tafs should cover this. Outside of showers,VFR conditions will prevail. Looking ahead to this evening, overall shower and thunderstorm coverage will be increasing. Key watches warnings advisories Fl... None. Gm... None. Public marine fire... Futterman aviation nowcasts... .Haner upper air data collection... ... Bt 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 | 10 mi | 26 min | E 10 G 17 | 10.00 mi | A Few Clouds | 90°F | 75°F | 62% | 1017.6 hPa |
Link to 5 minute data for KMTH
Wind History from MTH (wind in knots)
| 1 PM | 2 PM | 3 PM | 4 PM | 5 PM | 6 PM | 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 | |
| Last 24hr | E G15 | E | E | E | E | E | E | E | E | E | E | E | E | E | E | E | E | E | E | E | E G17 | E | E G18 | E G17 |
| 1 day ago | SE | SE | SE | Calm | Calm | E | E | E | E | E | E | Calm | E | E | SE | E | E | E | E | E | E | E | ||
| 2 days ago | S | SE | SE | SE | Calm | SE | SE | SW | W | N | N | Calm | SE | S | S | SE | S | S | S | S | S |
Tide / Current Tables for Long Key Channel (West), Florida
EDIT Weekend mode (on/off) (on/off) Help One Week of DataLong Key Channel (West)
Click for Map
Mon -- 12:12 AM EDT 0.12 feet Low Tide
Mon -- 06:49 AM EDT 1.12 feet High Tide
Mon -- 06:59 AM EDT Sunrise
Mon -- 10:19 AM EDT Moonset
Mon -- 12:08 PM EDT 0.25 feet Low Tide
Mon -- 06:48 PM EDT 1.28 feet High Tide
Mon -- 07:54 PM EDT Sunset
Mon -- 10:38 PM EDT Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Click for Map
Mon -- 12:12 AM EDT 0.12 feet Low Tide
Mon -- 06:49 AM EDT 1.12 feet High Tide
Mon -- 06:59 AM EDT Sunrise
Mon -- 10:19 AM EDT Moonset
Mon -- 12:08 PM EDT 0.25 feet Low Tide
Mon -- 06:48 PM EDT 1.28 feet High Tide
Mon -- 07:54 PM EDT Sunset
Mon -- 10:38 PM EDT Moonrise
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 |
| 0.1 | 0.2 | 0.3 | 0.5 | 0.7 | 0.9 | 1.1 | 1.1 | 1 | 0.8 | 0.6 | 0.3 | 0.3 | 0.3 | 0.5 | 0.7 | 0.9 | 1.1 | 1.2 | 1.3 | 1.2 | 1 | 0.7 | 0.4 |
Tide / Current Tables for Long Key Viaduct, Florida Current
EDIT (on/off) Help One Week of DataLong Key Viaduct
Click for Map
Mon -- 02:44 AM EDT -0.00 knots Slack
Mon -- 06:00 AM EDT -1.19 knots Max Ebb
Mon -- 06:59 AM EDT Sunrise
Mon -- 09:19 AM EDT 0.00 knots Slack
Mon -- 10:19 AM EDT Moonset
Mon -- 11:47 AM EDT 0.93 knots Max Flood
Mon -- 02:53 PM EDT -0.00 knots Slack
Mon -- 06:17 PM EDT -1.21 knots Max Ebb
Mon -- 07:54 PM EDT Sunset
Mon -- 09:42 PM EDT 0.00 knots Slack
Mon -- 10:38 PM EDT Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Click for Map
Mon -- 02:44 AM EDT -0.00 knots Slack
Mon -- 06:00 AM EDT -1.19 knots Max Ebb
Mon -- 06:59 AM EDT Sunrise
Mon -- 09:19 AM EDT 0.00 knots Slack
Mon -- 10:19 AM EDT Moonset
Mon -- 11:47 AM EDT 0.93 knots Max Flood
Mon -- 02:53 PM EDT -0.00 knots Slack
Mon -- 06:17 PM EDT -1.21 knots Max Ebb
Mon -- 07:54 PM EDT Sunset
Mon -- 09:42 PM EDT 0.00 knots Slack
Mon -- 10:38 PM EDT Moonrise
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 |
| 0.9 | 0.7 | 0.3 | -0.1 | -0.6 | -1 | -1.2 | -1.1 | -0.7 | -0.2 | 0.4 | 0.8 | 0.9 | 0.7 | 0.4 | -0.1 | -0.5 | -1 | -1.2 | -1.1 | -0.8 | -0.4 | 0.2 | 0.7 |
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 (12,3,4,5)
(on/off) Help
Ground Weather Radar Station Key West, FL
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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. |