Wednesday, December11, 2019
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Marine Weather and Tides
Key Colony Beach, FL

Version 3.4
NOTICE
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.
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 6:59AMSunset 5:40PM Wednesday December 11, 2019 3:57 AM EST (08:57 UTC) Moonrise 5:24PMMoonset 6:16AM Illumination 100% Phase: Full Moon; Moon at 14 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:201912110930;;170828 Fzus52 Kkey 110333 Cwfkey Coastal Waters Forecast For The Florida Keys National Weather Service Key West Fl 1033 Pm Est Tue Dec 10 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>044-110930- 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- 1033 Pm Est Tue Dec 10 2019
Overnight..East to southeast winds 10 to 15 knots. Seas 2 to 3 feet. NEarshore waters a light to moderate chop. Isolated showers.
Wednesday..East winds near 10 knots. Seas 1 to 3 feet. NEarshore waters a light chop. Isolated showers.
Wednesday night..Northeast to east winds near 10 knots, increasing to near 15 knots. Seas 1 to 3 feet. NEarshore waters a light chop, becoming a moderate chop. Isolated showers.
Thursday..Northeast to east winds near 15 knots. Seas 2 to 3 feet, except 3 to 4 feet west of cosgrove shoal light. NEarshore waters a moderate chop. Isolated showers.
Thursday night..East winds 15 to 20 knots, decreasing to near 15 knots. Seas 2 to 4 feet. NEarshore waters choppy, becoming a moderate chop. Isolated showers.
Friday..Southeast to south winds 10 to 15 knots, decreasing to near 10 knots. Seas 1 to 3 feet. NEarshore waters a light to moderate chop, becoming a light chop. Isolated showers.
Friday night..Southeast to south winds 5 to 10 knots. Seas 1 to 2 feet. NEarshore waters smooth to a light chop. Scattered showers.
Saturday..Southwest to west winds 5 to 10 knots. Seas around 1 foot. NEarshore waters smooth to a light chop. Isolated showers.
Saturday night..Northwest to north winds near 5 knots. Seas around 1 foot. NEarshore waters smooth. Isolated showers.
Sunday..Northeast to east winds near 10 knots. Seas 1 to 2 feet. NEarshore waters a light chop.
Sunday night..Northeast to east winds 10 to 15 knots. Seas around 2 feet. NEarshore waters a light to moderate chop.


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 110333 AFDKEY

Area Forecast Discussion National Weather Service Key West FL 1033 PM EST Tue Dec 10 2019

DISCUSSION. Currently - An Atlantic ridge extends west southwestward nosing across the southern Florida Peninsula and into the Gulf of Mexico. As a result, there is a substantial wind speed gradient across our area, with moderate east to southeast winds across the Florida Straits and light to gentle breezes over the gulf and bay waters. Skies are mostly clear along the island chain while scattered out past the gulf stream. This evenings sounding indicated decent low level veering. However, as of the sounding, there is a subtle inversion around 930 mb with drier air above. Only a few showers have recently developed over the warmer gulf stream waters.

Short Term Update - The ridge to our north will retreat some overnight resulting in winds becoming more uniform speedwise out of the east to southeast. Some semblance of low level veering is expected to remain in place for much of the night and the inhibition layer should erode away. Advertised slight chance of precipitation is still warranted, however most of the shower activity should remain over the straits. Temperatures will fall only a few more degrees into the mid 70s and dew points will linger in the mid 70s.

MARINE. A ridge to our north will retreat some back into the Atlantic overnight. As a result, winds across the straits will relax overnight a bit closer to the 10 knots or less over the gulf and bay side waters. Cautions will remain in effect for the Straits until winds to decrease. Otherwise very little changes made in the evening marine update.

AVIATION. VFR conditions expected at the island terminals overnight. Surface winds will be light out of the east southeast.

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



Public/Marine/Fire . 11 Aviation/Nowcasts . 11 Data Collection . 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
VCAF1 - 8723970 - Vaca Key, FL 1 mi58 min SE 5.1 G 8.9 79°F 76°F1018.8 hPa (-0.7)
SMKF1 - Sombrero Key, FL 5 mi38 min SE 13 G 15 80°F 75°F
LONF1 - Long Key, FL 16 mi38 min 78°F 1017.7 hPa75°F
PKYF1 - Peterson Key, FL 24 mi118 min 76°F
LRKF1 - Little Rabbit Key, FL 24 mi178 min 78°F
JKYF1 - Johnson Key, FL 27 mi118 min 76°F
MUKF1 - Murray Key, FL 29 mi118 min 74°F
BKYF1 32 mi118 min 79°F
BOBF1 - Bob Allen, FL 32 mi118 min 76°F
WRBF1 - Whipray Basin, FL 32 mi118 min E 5.1 78°F
GBTF1 - Garfield Bight, FL 36 mi118 min 78°F
TBYF1 37 mi118 min 78°F
WWEF1 38 mi178 min 76°F
KYWF1 - 8724580 - Key West, FL 39 mi58 min 78°F 81°F1018.8 hPa (-0.7)
BNKF1 - Butternut Key, FL 41 mi118 min 76°F
LMDF1 - Little Madeira, FL 41 mi118 min 77°F
CWAF1 42 mi178 min 75°F
LRIF1 42 mi118 min 76°F
TRRF1 - Taylor River, FL 43 mi118 min 78°F
SANF1 - Sand Key, FL 44 mi38 min ESE 8 G 8.9 79°F 1017.1 hPa77°F
NRRF1 45 mi118 min 74°F
SREF1 45 mi118 min 73°F
DKKF1 - Duck Key, FL 46 mi178 min 76°F
TCVF1 - Trout Cove, FL 46 mi178 min 78°F
JBYF1 47 mi118 min 77°F
GBIF1 - Gunboat Island, FL 47 mi118 min 74°F
BWSF1 - Blackwater Sound, FL 48 mi178 min 75°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 mi65 minSE 610.00 miMostly Cloudy79°F73°F85%1018.6 hPa

Link to 5 minute data for KMTH

Wind History from MTH (wind in knots)
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Last 24hrE7SE8SE8SE7SE8SE9SE8SE9SE8SE7SE8SE6SE7SE7SE7E6E4SE8E7SE8SE8SE7SE7SE6
1 day agoE4E5E6E4E5E9E8E7E7E7
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2 days agoNE5NE6NE6NE6NE6NE7NE9NE9NE9NE8E10E6E8E8E7E7E7E8E7E6E9E5E6E6

Tide / Current Tables for Boot Key Harbor, Vaca Key, Florida (2)
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Boot Key Harbor
Click for Map
Wed -- 02:22 AM EST     -0.10 feet Low Tide
Wed -- 06:16 AM EST     Moonset
Wed -- 06:58 AM EST     Sunrise
Wed -- 08:39 AM EST     1.56 feet High Tide
Wed -- 01:42 PM EST     0.44 feet Low Tide
Wed -- 05:23 PM EST     Moonrise
Wed -- 05:36 PM EST     Sunset
Wed -- 07:50 PM EST     2.38 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.50.1-0.1-0.10.20.60.91.31.51.51.41.10.70.50.40.71.11.622.32.42.21.91.4

Tide / Current Tables for Moser Channel (swingbridge), Florida Current
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Moser Channel (swingbridge)
Click for Map
Wed -- 01:45 AM EST     -2.32 knots Max Ebb
Wed -- 05:09 AM EST     0.00 knots Slack
Wed -- 06:16 AM EST     Moonset
Wed -- 06:58 AM EST     Sunrise
Wed -- 08:06 AM EST     2.01 knots Max Flood
Wed -- 11:34 AM EST     -0.00 knots Slack
Wed -- 02:29 PM EST     -1.89 knots Max Ebb
Wed -- 05:24 PM EST     Moonrise
Wed -- 05:36 PM EST     Sunset
Wed -- 05:44 PM EST     0.00 knots Slack
Wed -- 08:05 PM EST     1.28 knots Max Flood
Wed -- 10:54 PM EST     -0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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-1.5-2.2-2.3-2-1.2-0.20.91.721.91.40.6-0.4-1.3-1.8-1.8-1.4-0.70.211.31.10.6-0.1

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 (3,6,7,8)
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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 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.