Sunday, January19, 2020
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Marine Weather and Tides
Key Colony Beach, 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 7:11AMSunset 6:04PM Sunday January 19, 2020 12:10 PM EST (17:10 UTC) Moonrise 2:19AMMoonset 1:44PM Illumination 30% Phase: Waning Crescent; Moon at 24 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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GMZ053 Expires:202001192130;;194425 Fzus52 Kkey 191520 Cwfkey Coastal Waters Forecast For The Florida Keys National Weather Service Key West Fl 1020 Am Est Sun Jan 19 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. Gmz052>055-072>075-192130- Straits Of Florida From Ocean Reef To Craig Key Out 20 Nm- Straits Of Florida From Craig Key To West End Of Seven Mile Bridge Out 20 Nm- Straits Of Florida From West End Of Seven Mile Bridge To South Of Halfmoon Shoal Out 20 Nm- Straits Of Florida From Halfmoon Shoal To 20 Nm West Of Dry Tortugas Out 20 Nm- Straits Of Florida From Ocean Reef To Craig Key 20 To 60 Nm Out- Straits Of Florida From Craig Key To West End Of Seven Mile Bridge 20 To 60 Nm Out- Straits Of Florida From West End Of Seven Mile Bridge To South Of Halfmoon Shoal 20 To 60 Nm Out- Straits Of Florida From Halfmoon Shoal To 20 Nm West Of Dry Tortugas 20 To 60 Nm Out- 1020 Am Est Sun Jan 19 2020
This afternoon..Southeast winds 10 to 15 knots, decreasing to near 10 knots. Seas 3 to 4 feet. Isolated showers.
Tonight..East to southeast winds 5 to 10 knots, becoming northwest to north early in the morning. Seas 2 to 3 feet. Scattered showers.
Monday..North winds increasing to 15 to 20 knots. Seas 2 to 3 feet, building to 4 to 7 feet in the afternoon. Scattered showers.
Monday night..North winds near 20 knots. Seas 5 to 9 feet. Scattered showers.
Tuesday..Northwest to north winds 20 to 25 knots. Seas 5 to 9 feet. Isolated showers.
Tuesday night..North winds near 25 knots. Seas 6 to 10 feet.
Wednesday..North to northeast winds near 20 knots. Seas 5 to 9 feet, subsiding to 5 to 7 feet.
Wednesday night..Northeast to east winds 15 to 20 knots. Seas 5 to 8 feet. Isolated showers.
Thursday..East winds 15 to 20 knots. Seas 5 to 7 feet. Isolated showers.
Thursday night..East to southeast winds 15 to 20 knots. Seas 5 to 7 feet. Scattered showers.


7 Day Forecast for Marine Location Near Key Colony Beach, FL
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location: 24.7, -81.1     debug


Area Discussion for - Key West, FL
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FXUS62 KKEY 191517 AFDKEY

Area Forecast Discussion National Weather Service Key West FL 1017 AM EST Sun Jan 19 2020

DISCUSSION. Mostly sunny skies were observed over most of the Florida Keys save boughts of stratocumulus over portions of the Lower Keys, aided by a weak warm advection pattern occasionally saturating the lower troposphere beneath a 4.5C temperature inversion at 9000 ft. Temperatures were a bit a warmer than same time yesterday, entering the upper 70s with dewpoints in the 65-68F range. Winds have gradually become southeast this morning with speeds 5 to 10 mph over the islands, and near or a bit above 10 knots along the reef.

For the remainder of the afternoon, trapped moisture beneath the inversion from shallow buoyancy over the Straits will be weakly focused along the confluent zone north of Cuba, and gradually eroding into the afternoon. An earlier perhaps pessimistic public forecast update was made to account for boughts of cloudiness although measureable rain chances remain generally 10 percent or less for the rest of today.

MARINE. No watches, warnings or advisories are currently in effect for the Florida Keys coastal waters. Southeast winds will gradually become south and decrease further into this evening. However, a cold front expected to pass through the Keys during the day Monday will bring strong northerly breezes, which will last through Tuesday and Wednesday. An addtional freshening of east breezes may occur later Thursday as strong ridging builds southeast across Virginia and the western Atlantic.

AVIATION. VFR conditions are expected to prevail at the Key West and Marathon terminals through tonight. Latest radar images show a few showers south of the Lower Keys that may bring light precipitation to the Key West terminal late morning into early afternoon. Winds SE near 10 knots, decreasing to near 5 knots tonight. A cold front will move across the island chain tomorrow morning, causing winds to become more northerly. A few showers are likely along the frontal boundary.

CLIMATE. On this date in 1997, the daily record low temperature of 48 degrees was last recorded in Key West. Temperature records date back to 1872.

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

Public/Marine/Fire . JR Aviation/Nowcasts . SDR Data Collection . NB

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
VCAF1 - 8723970 - Vaca Key, FL 1 mi52 min 79°F 73°F1020.7 hPa
SMKF1 - Sombrero Key, FL 5 mi30 min ESE 9.9 G 12 77°F 68°F
LRKF1 - Little Rabbit Key, FL 24 mi130 min 72°F
PKYF1 - Peterson Key, FL 24 mi70 min 72°F
JKYF1 - Johnson Key, FL 27 mi70 min 71°F
MUKF1 - Murray Key, FL 29 mi70 min 72°F
WRBF1 - Whipray Basin, FL 32 mi70 min E 4.1 73°F
BKYF1 32 mi70 min 71°F
BOBF1 - Bob Allen, FL 32 mi70 min 74°F
GBTF1 - Garfield Bight, FL 36 mi70 min 72°F
TBYF1 37 mi70 min 72°F
WWEF1 38 mi130 min 71°F
KYWF1 - 8724580 - Key West, FL 39 mi58 min 76°F 78°F1021 hPa
LMDF1 - Little Madeira, FL 41 mi70 min 72°F
BNKF1 - Butternut Key, FL 41 mi70 min 72°F
CWAF1 42 mi130 min 71°F
LRIF1 42 mi70 min 71°F
TRRF1 - Taylor River, FL 43 mi70 min 71°F
SANF1 - Sand Key, FL 44 mi30 min SSE 8.9 G 11 76°F 69°F
SREF1 45 mi70 min 73°F
NRRF1 45 mi70 min 73°F
DKKF1 - Duck Key, FL 46 mi130 min 71°F
TCVF1 - Trout Cove, FL 46 mi130 min 73°F
GBIF1 - Gunboat Island, FL 47 mi70 min 73°F
JBYF1 47 mi70 min 72°F
BWSF1 - Blackwater Sound, FL 48 mi130 min 72°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, FL4 mi77 minESE 710.00 miPartly Cloudy80°F68°F67%1020.6 hPa

Link to 5 minute data for KMTH

Wind History from MTH (wind in knots)
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E8E7E6E8E7E8E6E6E4E3SE7SE5SE7E7--
1 day agoNE8NE8E12E9NE8E5
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2 days agoE9E6----E11E9----E9E9----E8E7E7E8E6--E6NE6--NE10--NE10

Tide / Current Tables for Boot Key Harbor, Vaca Key, Florida
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Boot Key Harbor
Click for Map
Sun -- 02:19 AM EST     Moonrise
Sun -- 05:01 AM EST     0.93 feet High Tide
Sun -- 07:10 AM EST     Sunrise
Sun -- 09:44 AM EST     0.42 feet Low Tide
Sun -- 01:43 PM EST     Moonset
Sun -- 04:07 PM EST     1.83 feet High Tide
Sun -- 05:59 PM EST     Sunset
Sun -- 11:32 PM EST     -0.31 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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00.30.60.80.90.90.90.80.60.50.40.60.81.21.51.71.81.81.61.30.80.4-0-0.3

Tide / Current Tables for Moser Channel (swingbridge), Florida Current
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Moser Channel (swingbridge)
Click for Map
Sun -- 01:27 AM EST     0.00 knots Slack
Sun -- 02:19 AM EST     Moonrise
Sun -- 04:52 AM EST     1.40 knots Max Flood
Sun -- 07:10 AM EST     Sunrise
Sun -- 07:54 AM EST     -0.00 knots Slack
Sun -- 11:01 AM EST     -1.34 knots Max Ebb
Sun -- 01:43 PM EST     Moonset
Sun -- 02:07 PM EST     0.00 knots Slack
Sun -- 04:51 PM EST     0.80 knots Max Flood
Sun -- 06:00 PM EST     Sunset
Sun -- 07:20 PM EST     -0.00 knots Slack
Sun -- 11:04 PM EST     -1.95 knots Max Ebb
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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-1.2-0.40.411.31.41.20.7-0.1-0.8-1.2-1.3-1.2-0.7-0.10.50.70.80.70.2-0.5-1.2-1.8-1.9

Weather Map
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wmap_A
GEOS Local Image of Southeast    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)
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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.