Sunday, January17, 2021
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Marine Weather and Tides
Duck Key, FL

Version 3.4
NOTICE
8/26/2020 The 7 day forecast is taking about 5 seconds to load but it will eventually load. NOAA is still working on it.
8/18/2020 NOAA continues to have trouble. Wind guest will occasionally be left off graphs. I am working with NOAA to resolve the issue.
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 7:11AMSunset 6:03PM Sunday January 17, 2021 3:55 AM EST (08:55 UTC) Moonrise 10:28AMMoonset 10:23PM Illumination 16% Phase: Waxing Crescent; Moon at 4 days in cycle
NOTE: Some of the data on this page has not been verified and should be used with that in mind. It may and occasionally will, be wrong. The tide reports are by xtide and are NOT FOR NAVIGATION.
Marine Forecasts
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GMZ043 Expires:202101170930;;036239 Fzus52 Kkey 170329 Cwfkey Coastal Waters Forecast For The Florida Keys National Weather Service Key West Fl 1029 Pm Est Sat Jan 16 2021 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>044-170930- 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- 1029 Pm Est Sat Jan 16 2021
Overnight..Northwest winds 10 to 15 knots, becoming north and decreasing to near 10 knots. Seas 1 to 3 feet, except 3 to 5 feet west of cosgrove shoal light due to west swell. NEarshore waters a light to moderate chop, becoming a light chop.
Sunday..North to northeast winds near 10 knots, becoming northwest to north near 5 knots. Seas 1 to 2 feet, except 2 to 4 feet west of cosgrove shoal light due to west swell. NEarshore waters a light chop, becoming smooth.
Sunday night..Variable winds near 5 knots, becoming northwest. Seas 1 to 3 feet due to west swell. NEarshore waters smooth. Isolated showers.
Monday..Northwest to north winds 5 to 10 knots, becoming north and increasing to near 10 knots. Seas 1 to 3 feet. NEarshore waters becoming a light to moderate chop.
Monday night..Northeast winds increasing to near 15 knots. Seas 2 to 3 feet. NEarshore waters becoming a moderate chop.
Tuesday..Northeast to east winds 15 to 20 knots. Seas 2 to 3 feet, except 2 to 4 feet west of cosgrove shoal. NEarshore waters choppy.
Tuesday night..Northeast to east winds near 15 knots. Seas 2 to 3 feet. NEarshore waters a moderate chop.
Wednesday..Northeast winds near 15 knots. Seas 2 to 3 feet. NEarshore waters a moderate chop.
Wednesday night..East winds decreasing to 10 to 15 knots. Seas 2 to 3 feet. NEarshore waters becoming a light to moderate chop.
Thursday..East winds 10 to 15 knots. Seas 1 to 3 feet. NEarshore waters a light to moderate chop.
Thursday night..Southeast winds near 10 knots. Seas 1 to 2 feet. NEarshore waters a light chop.


7 Day Forecast for Marine Location Near Duck Key, FL
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location: 24.79, -80.88     debug


Area Discussion for - Key West, FL
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FXUS62 KKEY 170319 AFDKEY

Area Forecast Discussion National Weather Service Key West FL 1019 PM EST Sat Jan 16 2021

DISCUSSION. High pressure centered over the southern Gulf of Mexico supports gentle to moderate northwesterly breezes across the Florida Keys. There is a bunch of cloud cover across the islands, both high cirrus and low-ish stratus, the stratus based right beneath the healthy inversion sampled by the 00Z KKEY RAOB. The high will lose continuity overnight as it slides east, degenerating into a fractured ridge axis. The northwest to north breezes will steadily decline overnight. Temperatures in the lower 60s will fall a few more degrees, with some locations touching the upper 50s. No changes needed or forecast.

MARINE. Small Craft Advisory in effect for the coastal waters west of Rebecca Shoal due to west to northwest swells as high as 7 feet. A pressure ridge will build eastwards across Florida tonight. A moderate west to northwest wind surge ongoing due to day time heating over Florida should abate after dark, after which light breezes will shift northerly. Breezes will slacken further on Sunday as the ridge axis shifts into the Keys. Another high pressure center will move east along the northern Gulf Coast Sunday through Monday, with gentle north to northeast breezes prevailing across the Keys. This high will strengthen over the Southeastern United States Monday night and Tuesday, with freshening northeast to east breezes over the Keys waters. The high will then settle slowly southward across the Florida peninsula on Wednesday, allowing breezes to relax.

AVIATION. Stratus layers will be off-and-on overnight based at 040-050, right at the large inversion sampled by the 00Z KKEY RAOB. Northerly breezes will tend to go variable Sunday afternoon.

PRELIMINARY POINT TEMPS/POPS. Key West 61 68 61 71 / 0 0 20 - Marathon 59 68 59 71 / 0 0 20 -

KEY WATCHES/WARNINGS/ADVISORIES. FL . None. GM . Small Craft Advisory for GMZ033-034-055- 075.



Public/Marine/Fire . CLR Aviation/Nowcasts . CLR Data Acquisition . DR

Visit us on the web at weather.gov/key

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Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
PKYF1 - Peterson Key, FL 11 mi55 min 67°F
VCAF1 - 8723970 - Vaca Key, FL 13 mi55 min NNE 6 G 8 64°F 69°F1016.8 hPa (-0.5)
LRKF1 - Little Rabbit Key, FL 14 mi115 min 68°F
JKYF1 - Johnson Key, FL 18 mi55 min 65°F
BOBF1 - Bob Allen, FL 19 mi55 min 67°F
WRBF1 - Whipray Basin, FL 21 mi55 min NNW 8.9 65°F
MUKF1 - Murray Key, FL 22 mi55 min 67°F
BKYF1 23 mi55 min 65°F
GBTF1 - Garfield Bight, FL 26 mi55 min 66°F
TBYF1 27 mi55 min 68°F
BNKF1 - Butternut Key, FL 28 mi55 min 67°F
LMDF1 - Little Madeira, FL 30 mi55 min 67°F
WWEF1 31 mi115 min 69°F
TRRF1 - Taylor River, FL 32 mi55 min 67°F
LRIF1 34 mi55 min 68°F
DKKF1 - Duck Key, FL 34 mi115 min 68°F
TCVF1 - Trout Cove, FL 35 mi115 min 69°F
JBYF1 35 mi55 min 69°F
BWSF1 - Blackwater Sound, FL 36 mi115 min 69°F
CWAF1 36 mi115 min 67°F
LBSF1 - Little Blackwater, FL 38 mi115 min 68°F
LSNF1 - Long Sound, FL 38 mi55 min 69°F
NRRF1 38 mi55 min 67°F
MNBF1 39 mi55 min 68°F
THRF1 39 mi115 min 67°F
HCEF1 - Highway Creek, FL 40 mi55 min 69°F
SREF1 41 mi55 min 68°F
GBIF1 - Gunboat Island, FL 41 mi55 min 68°F
TPEF1 - Tarpon Bay East, FL 43 mi115 min 67°F
MDKF1 43 mi55 min 69°F
CANF1 - Cane Patch, FL 44 mi55 min 68°F
HREF1 45 mi55 min 68°F
BDVF1 - Broad River, FL 48 mi55 min 68°F

Wind History for Vaca Key, FL
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
The Florida Keys - Marathon International Airport, FL10 mi62 minNNE 510.00 miOvercast61°F53°F75%1016.5 hPa

Link to 5 minute data for KMTH

Wind History from MTH (wind in knots)
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1 day agoN4NW7N3N5NW10N5N6NE7N5N6N4N3SE3CalmCalmCalmS64SW5S4--W4W7W10
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Tide / Current Tables for Long Key Channel (West), Florida
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Long Key Channel (West)
Click for Map
Sun -- 06:00 AM EST     1.17 feet High Tide
Sun -- 07:09 AM EST     Sunrise
Sun -- 10:28 AM EST     Moonrise
Sun -- 12:19 PM EST     -0.20 feet Low Tide
Sun -- 05:57 PM EST     Sunset
Sun -- 06:57 PM EST     0.77 feet High Tide
Sun -- 10:23 PM EST     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.10.20.50.70.91.11.21.10.90.60.2-0.1-0.2-0.2-00.20.40.60.70.80.70.50.30.1

Tide / Current Tables for Long Key Viaduct, Florida Current
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Long Key Viaduct
Click for Map
Sun -- 02:12 AM EST     -0.00 knots Slack
Sun -- 05:39 AM EST     -1.27 knots Max Ebb
Sun -- 07:09 AM EST     Sunrise
Sun -- 09:01 AM EST     0.00 knots Slack
Sun -- 10:28 AM EST     Moonrise
Sun -- 11:34 AM EST     0.90 knots Max Flood
Sun -- 02:56 PM EST     -0.00 knots Slack
Sun -- 05:57 PM EST     Sunset
Sun -- 06:10 PM EST     -1.10 knots Max Ebb
Sun -- 09:28 PM EST     0.00 knots Slack
Sun -- 10:23 PM EST     Moonset
Sun -- 11:50 PM EST     0.74 knots Max Flood
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.70.50.1-0.4-0.9-1.2-1.3-1-0.6-00.50.90.90.70.4-0-0.5-0.9-1.1-1-0.7-0.30.30.6

Weather Map
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wmap_A
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
Ground Weather Radar Station



Gulf Stream Current



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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 numerous 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.