Thursday, July9, 2020
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Marine Weather and Tides
Duck Key, FL

Version 3.4
NOTICE
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 6:44AMSunset 8:20PM Thursday July 9, 2020 6:50 AM EDT (10:50 UTC) Moonrise 10:49PMMoonset 9:44AM Illumination 84% Phase: Waning Gibbous; Moon at 19 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:202007091430;;559558 Fzus52 Kkey 090827 Cwfkey Coastal Waters Forecast For The Florida Keys National Weather Service Key West Fl 427 Am Edt Thu Jul 9 2020 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>044-091430- 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- 427 Am Edt Thu Jul 9 2020
Today..North to northeast winds 5 to 10 knots, becoming variable. Seas around 1 foot. NEarshore waters smooth to a light chop. Isolated showers and Thunderstorms.
Tonight..Variable winds 5 to 10 knots decreasing to near 5 knots. Seas 1 foot or less. NEarshore waters smooth to a light chop, becoming smooth. Isolated showers and Thunderstorms.
Friday..West to northwest winds 5 to 10 knots. Seas 1 foot or less. NEarshore waters smooth to a light chop. Isolated showers and Thunderstorms.
Friday night and Saturday..Southwest to west winds near 10 knots. Seas 1 to 2 feet. NEarshore waters a light chop. Isolated showers and Thunderstorms.
Saturday night and Sunday..Southwest winds near 10 knots. Seas 1 to 2 feet. NEarshore waters a light chop. Isolated showers and Thunderstorms.
Sunday night..South to southwest winds 5 to 10 knots. Seas around 1 foot. NEarshore waters smooth to a light chop. Isolated showers and Thunderstorms.
Monday..Southeast to south winds 5 to 10 knots. Seas around 1 foot. NEarshore waters smooth to a light chop. Isolated showers and Thunderstorms.
Monday night..East to southeast winds near 5 to 10 knots. Seas around 1 foot. NEarshore waters smooth to a light chop. Isolated showers and Thunderstorms.


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 090812 AFDKEY

Area Forecast Discussion National Weather Service Key West FL 412 AM EDT Thu Jul 9 2020

DISCUSSION. CURRENTLY. Under partly cloudy skies and light north to northeast winds, temperatures are in the lower to mid 80s in most island communities. Meanwhile, local radars are detecting isolated showers and an occasional thunderstorm near the Florida Keys and the adjacent nearshore waters. On our marine district, winds are mainly north to northeast at less than 10 knots.

SHORT TERM. (Today through Saturday night) Our region will lie between a splintered ridge axis, with one center over the Gulf of Mexico and the second just to our east for at least the next couple of days. With that, ample low level moisture and a light north to northeast steering flow will provide the possibility of cloud line genesis today and cells and outflow boundaries triggering off the South Florida Mainland over the next couple of days. Hence, isolated 20 percent rain chances will be retained. For the beginning of this weekend, the latest GFS guidance run indicates a secondary short wave trough will dig further equatorward than previous runs, while ECMWF remains steadfast with the ridge axis lingering near the Florida Keys and the Straits of Florida. For now, enough low level moisture and a light south to southwest wind may allow cloud line genesis or the cuban shadow which would limit cell coverage. Subsequently, will keep isolated 20 percent rain chances for this time frame.

LONG TERM. (Sunday through Wednesday) As mentioned earlier, GFS holds our region in the southern envelope of a low and mid level trough, but due to consistency and climatology will lean toward the ECMWF solution which keeps our region within a col region to weak anticyclonic flow from (700 mb- surface) through most of the period. However, given some uncertainty will retain 20 to 30 percent rain chances until forecast confidence and consistency comes about.

MARINE. Away from showers and thunderstorms, light to gentle winds will prevail on Keys coastal waters for the balance of this week before gentle winds predominate for most of our marine district this weekend.

AVIATION. VFR conditions will be the predominant for today. With that being said, there isolated showers and possibly a thunderstorm or two will remain in the vicinity of both terminals this morning. Thereafter, we will see a break with additional showers re-developing this afternoon. Winds will remain light through the period.

CLIMATE. In 2005, Hurricane Dennis significantly impacted the Florida Keys. It produced a cool high temperature of 82 degrees and 4.25 inches of rain fell at Key West airport, both daily records. This is the only Hurricane to directly affect the Keys during the month of July in the last hundred years.

PRELIMINARY POINT TEMPS/POPS. Key West 92 84 92 84 / 20 20 10 10 Marathon 94 84 94 84 / 20 20 20 20

KEY WATCHES/WARNINGS/ADVISORIES. FL . None. GM . None.

Public/Marine/Fire . APA Aviation/Nowcasts . LIW

Visit us on the web at weather.gov/key

Follow us on Facebook and Twitter at: www.facebook.com/nwskeywest www.twitter.com/nwskeywest


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
LONF1 - Long Key, FL 4 mi110 min ENE 8 G 11 1013.4 hPa
PKYF1 - Peterson Key, FL 11 mi50 min 91°F
VCAF1 - 8723970 - Vaca Key, FL 13 mi50 min NNE 6 G 8.9 83°F 91°F1014 hPa (+0.0)
LRKF1 - Little Rabbit Key, FL 14 mi110 min 91°F
SMKF1 - Sombrero Key, FL 17 mi50 min ESE 1.9 G 4.1 85°F 1014.4 hPa76°F
JKYF1 - Johnson Key, FL 18 mi50 min 87°F
BOBF1 - Bob Allen, FL 19 mi50 min 89°F
WRBF1 - Whipray Basin, FL 21 mi50 min NW 8 89°F
MUKF1 - Murray Key, FL 22 mi50 min 88°F
BKYF1 23 mi50 min 89°F
GBTF1 - Garfield Bight, FL 26 mi50 min 89°F
TBYF1 27 mi50 min 91°F
BNKF1 - Butternut Key, FL 28 mi50 min 91°F
LMDF1 - Little Madeira, FL 30 mi50 min 91°F
WWEF1 31 mi110 min 89°F
TRRF1 - Taylor River, FL 32 mi50 min 95°F
LRIF1 34 mi50 min 89°F
DKKF1 - Duck Key, FL 34 mi110 min 91°F
TCVF1 - Trout Cove, FL 35 mi110 min 90°F
JBYF1 35 mi50 min 90°F
BWSF1 - Blackwater Sound, FL 36 mi110 min 93°F
CWAF1 36 mi110 min 88°F
LBSF1 - Little Blackwater, FL 38 mi110 min 90°F
LSNF1 - Long Sound, FL 38 mi50 min 91°F
NRRF1 38 mi50 min 86°F
MNBF1 39 mi50 min 93°F
THRF1 39 mi110 min 89°F
HCEF1 - Highway Creek, FL 40 mi50 min 95°F
SREF1 41 mi50 min 89°F
GBIF1 - Gunboat Island, FL 41 mi50 min 86°F
TPEF1 - Tarpon Bay East, FL 43 mi110 min 87°F
MDKF1 43 mi50 min 92°F
CANF1 - Cane Patch, FL 44 mi50 min 84°F
HREF1 45 mi50 min 85°F
BDVF1 - Broad River, FL 48 mi50 min 87°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 mi57 minN 610.00 miThunderstorm81°F73°F79%1013.9 hPa

Link to 5 minute data for KMTH

Wind History from MTH (wind in knots)
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Last 24hrCalmCalm3E44SE5SE534SE5S4CalmNW3CalmSW3CalmCalmCalmE5CalmCalmCalmNE7N6
1 day agoE4E466SE554E7SE5S5SE4SE5SE4SE5E3E4E4NE5E3E5E4N85Calm
2 days agoS53S6SE5S6S5S7SE53N10E4NE7NE7E5E3NW10NE4CalmE3E4E4E4E5SE6

Tide / Current Tables for Long Key Channel (West), Florida
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Long Key Channel (West)
Click for Map
Thu -- 01:03 AM EDT     -0.16 feet Low Tide
Thu -- 06:41 AM EDT     Sunrise
Thu -- 07:47 AM EDT     0.82 feet High Tide
Thu -- 10:44 AM EDT     Moonset
Thu -- 12:24 PM EDT     0.26 feet Low Tide
Thu -- 07:09 PM EDT     1.28 feet High Tide
Thu -- 08:16 PM EDT     Sunset
Thu -- 11:49 PM EDT     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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-0.1-0.2-0.10.10.30.50.70.80.80.70.60.40.30.30.40.60.81.11.21.31.21.10.80.4

Tide / Current Tables for Long Key Viaduct, Florida Current
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Long Key Viaduct
Click for Map
Thu -- 12:13 AM EDT     0.96 knots Max Flood
Thu -- 03:42 AM EDT     -0.00 knots Slack
Thu -- 06:41 AM EDT     Sunrise
Thu -- 06:50 AM EDT     -1.06 knots Max Ebb
Thu -- 10:04 AM EDT     0.00 knots Slack
Thu -- 10:44 AM EDT     Moonset
Thu -- 12:21 PM EDT     0.69 knots Max Flood
Thu -- 03:25 PM EDT     -0.00 knots Slack
Thu -- 06:56 PM EDT     -1.17 knots Max Ebb
Thu -- 08:16 PM EDT     Sunset
Thu -- 10:21 PM EDT     0.00 knots Slack
Thu -- 11:49 PM EDT     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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10.90.70.3-0.2-0.7-1-1.1-0.9-0.6-00.40.70.60.50.2-0.3-0.7-1.1-1.2-1-0.7-0.20.4

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
Wind Forecast for Key West, FL (6,6,7,8)
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Ground Weather Radar Station Key West, FL
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weather_mapweather_map weather_map

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.