Saturday, January25, 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 7:10AMSunset 6:08PM Saturday January 25, 2020 8:48 AM EST (13:48 UTC) Moonrise 7:48AMMoonset 6:53PM Illumination 0% Phase: New Moon; Moon at 0 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:202001251545;;486686 Fzus52 Kkey 251021 Cca Cwfkey Coastal Waters Forecast For The Florida Keys...corrected National Weather Service Key West Fl 442 Am Est Sat Jan 25 2020 Corrected To Insert Sea Heights On The Bayside And Gulf First Period 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>044-251545- 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- 442 Am Est Sat Jan 25 2020
Today..Mainly north winds near 10 knots. Seas 1 to 2 feet. NEarshore waters a light chop. West of the seven mile bridge, north winds near 10 knots, increasing to near 15 knots this afternoon. Seas 1 to 2 feet. Building to 2 to 3 feet. NEarshore waters a light chop, becoming a moderate chop. Isolated showers.
Tonight..North winds 10 to 15 knots. Seas 1 to 3 feet. NEarshore waters a light to moderate chop.
Sunday..North to northeast winds 10 to 15 knots, becoming northeast and decreasing to near 10 knots. Seas 1 to 3 feet, subsiding to 1 to 2 feet. NEarshore waters a light to moderate chop, becoming a light chop.
Sunday night..Northeast winds 5 to 10 knots, becoming variable after midnight. Seas around 1 foot. NEarshore waters smooth to a light chop. Isolated showers.
Monday..Variable winds 5 to 10 knots, becoming southwest to west and increasing to 10 to 15 knots late. Seas around 1 foot, building to 1 to 3 feet. NEarshore waters becoming a light to moderate chop. Scattered showers and isolated Thunderstorms developing in the afternoon.
Monday night..Winds becoming northwest to north near 15 knots. Seas 2 to 3 feet. NEarshore waters a moderate chop. Scattered showers and isolated Thunderstorms in the evening, then isolated showers.
Tuesday..North to northeast winds 10 to 15 knots, decreasing to near 10 knots in the afternoon. Seas 1 to 3 feet, subsiding to 1 to 2 feet. NEarshore waters a light to moderate chop, becoming a light chop. Isolated showers.
Tuesday night..North to northeast winds near 10 knots. Seas 1 to 2 feet. NEarshore waters a light chop. Isolated showers.
Wednesday..Variable winds 5 to 10 knots. Seas 1 foot or less. NEarshore waters smooth to a light chop. Isolated showers.
Wednesday night..North to northeast winds near 10 knots. Seas 1 to 2 feet. NEarshore waters a light chop. Isolated showers.


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 251052 AFDKEY

Area Forecast Discussion National Weather Service Key West FL 552 AM EST Sat Jan 25 2020

DISCUSSION. CURRENTLY. Under partly cloudy skies and light north winds, temperatures are in the mid 60s along the Florida Keys. Meanwhile, local radars are detecting only isolated shallow showers on the Straits of Florida. On our marine district, winds are north ranging from 4 knots at Pulaski Shoal Light to 13 knots at Alligator Reef Light.

SHORT TERM. (Today through Monday night) High pressure over the central Gulf coast region this morning will track eastward and move across the Sunshine State on Sunday. With that, a lack of low level confluence and decreasing moisture will prompt only nickle pops to be inserted in the grids for the island chain today through Sunday. Thereafter, forecast confidence drops off considerably, as a southern stream mid and upper level short wave trough is expected to migrate eastward through the Gulf of Mexico late Sunday night and Monday, before crossing the Florida Peninsula Monday night. However, it appears the large scale ascent will lag behind the low level confluent frontal boundary. In addition, both GFS and the Canadian guidance indicate the surface reflection will dissipate before reaching the Sunshine State, while the ECMWF has become more bullish. Given the divergence and flip flopping, will retain only isolated rain chances beginning Sunday night through Monday morning, with high chance pops Monday afternoon and evening. Temperatures will be near to slightly below normal through Sunday, before moderating late Sunday night and Monday.

LONG TERM. (Tuesday through Friday) Above normal uncertainty for this time frame with medium range guidance and ensemble members diverging considerably especially on Wednesday and Wednesday night. Regardless, moisture should be limited with no extreme temperatures expected through this period. Subsequently, near climo pops and temperatures will be kept through this time frame. Hence, 10 to 20 percent rain chances with low temperatures generally in the mid 60s with afternoon highs in the mid to upper 70s are anticipated.

MARINE. Mainly north winds near 10 knots will prevail on most Keys coastal waters, except near 15 knots with gusts near 20 knots on the outer waters of Mainland Monroe southward into the Straits out 60 nm. Otherwise, gentle to occasional moderate mostly north winds will predominate tonight and early Sunday morning, before decreasing into the light to gentle range through Monday morning. Thereafter, winds will become moderate behind a weak cold front Monday night, before slackening again late Tuesday into Wednesday.

AVIATION. VFR conditions should prevail at both terminals. Overnight BKN clouds at FL080, winds near 5 knots and temperature and dew point spread has been just enough to inhibit significant fog formation. Currently, confidence is not high enough to include fog in the forecast. Once the front clears the island chain this afternoon, north winds near 10 knots and relatively drier air will bring sustained VFR conditions for the remainder of the forecast period.

CLIMATE. In 1940, the daily record low temperature of 49 degrees was recorded in Key West. Temperature records date back to 1872.

PRELIMINARY POINT TEMPS/POPS. Key West 75 63 72 64 / - - - 20 Marathon 76 62 71 64 / - - - 20

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

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

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 mi49 min 65°F
VCAF1 - 8723970 - Vaca Key, FL 13 mi49 min NNE 4.1 G 5.1 66°F 68°F1018.2 hPa (+2.1)
LRKF1 - Little Rabbit Key, FL 14 mi109 min 64°F
SMKF1 - Sombrero Key, FL 17 mi19 min NNE 11 G 13 69°F 65°F
JKYF1 - Johnson Key, FL 18 mi49 min 66°F
BOBF1 - Bob Allen, FL 19 mi49 min 65°F
WRBF1 - Whipray Basin, FL 21 mi49 min N 4.1 66°F
MUKF1 - Murray Key, FL 22 mi49 min 66°F
BKYF1 23 mi49 min 68°F
GBTF1 - Garfield Bight, FL 26 mi49 min 68°F
TBYF1 27 mi49 min 69°F
LMDF1 - Little Madeira, FL 30 mi49 min 65°F
WWEF1 31 mi109 min 67°F
TRRF1 - Taylor River, FL 32 mi49 min 68°F
LRIF1 34 mi49 min 67°F
DKKF1 - Duck Key, FL 34 mi109 min 66°F
JBYF1 35 mi49 min 68°F
TCVF1 - Trout Cove, FL 35 mi109 min 67°F
CWAF1 36 mi109 min 66°F
BWSF1 - Blackwater Sound, FL 36 mi109 min 67°F
LBSF1 - Little Blackwater, FL 38 mi109 min 66°F
LSNF1 - Long Sound, FL 38 mi49 min 67°F
NRRF1 38 mi49 min 67°F
THRF1 39 mi109 min 67°F
HCEF1 - Highway Creek, FL 40 mi49 min 71°F
GBIF1 - Gunboat Island, FL 41 mi49 min 66°F
SREF1 41 mi49 min 65°F
TPEF1 - Tarpon Bay East, FL 43 mi109 min 67°F
CANF1 - Cane Patch, FL 44 mi49 min 66°F
HREF1 45 mi49 min 65°F
BDVF1 - Broad River, FL 48 mi49 min 67°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 mi56 minNNE 610.00 miOvercast67°F64°F91%1017.8 hPa

Link to 5 minute data for KMTH

Wind History from MTH (wind in knots)
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Last 24hr----NW5N5N4N5NW4CalmNW3CalmW4CalmS3CalmN5N4CalmN5N4NE4NE5N4N5NE6
1 day agoN8N7N8N9NE7N5N6N4N3CalmNE5N5NE6NE7NE7N7NE7NE5NE4NE8NW4W3N5N4
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Tide / Current Tables for Long Key Channel (West), Florida
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Long Key Channel (West)
Click for Map
Sat -- 03:26 AM EST     1.33 feet High Tide
Sat -- 07:08 AM EST     Sunrise
Sat -- 07:47 AM EST     Moonrise
Sat -- 09:58 AM EST     -0.39 feet Low Tide
Sat -- 04:39 PM EST     0.67 feet High Tide
Sat -- 06:03 PM EST     Sunset
Sat -- 06:53 PM EST     Moonset
Sat -- 09:10 PM EST     0.03 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.711.21.31.31.10.80.3-0.1-0.3-0.4-0.3-0.20.10.30.50.60.70.50.30.100.10.3

Tide / Current Tables for Long Key Viaduct, Florida Current
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Long Key Viaduct
Click for Map
Sat -- 03:09 AM EST     -1.53 knots Max Ebb
Sat -- 06:26 AM EST     0.00 knots Slack
Sat -- 07:08 AM EST     Sunrise
Sat -- 07:47 AM EST     Moonrise
Sat -- 09:27 AM EST     1.14 knots Max Flood
Sat -- 12:41 PM EST     -0.00 knots Slack
Sat -- 03:46 PM EST     -1.19 knots Max Ebb
Sat -- 06:03 PM EST     Sunset
Sat -- 06:48 PM EST     0.00 knots Slack
Sat -- 06:53 PM EST     Moonset
Sat -- 09:16 PM EST     0.80 knots Max Flood
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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-0.3-0.9-1.3-1.5-1.4-1-0.30.40.91.11.10.90.4-0.2-0.8-1.1-1.2-1-0.50.10.60.80.80.5

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 (8,2,3,4)
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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.