Thursday, October28, 2021
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Marine Weather and Tides
Key Colony Beach, FL

Version 3.4
NOTICE
3/30/2021 -- ANZ330 has been split into ANZ331 and ANZ332. Click EDIT in Marine Forecast and select your new zone.
1/26/2021 -- The West Coast Satellite images havd been updated. They now use GEOS-17.
1/1/2021 -- The 7 day forecast are now working well. Thank you NOAA for your support.

Sunrise 7:30AMSunset 6:50PM Thursday October 28, 2021 4:54 PM EDT (20:54 UTC) Moonrise 12:00AMMoonset 1:14PM Illumination 45% Phase: Third Quarter Moon; Moon at 23 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:202110290230;;929300 Fzus52 Kkey 282022 Cwfkey Coastal Waters Forecast For The Florida Keys National Weather Service Key West Fl 422 Pm Edt Thu Oct 28 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>044-290230- 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- 422 Pm Edt Thu Oct 28 2021
.small craft advisory in effect...
Tonight..Southwest winds near 20 knots. Seas 2 to 5 feet. NEarshore waters rough. Numerous showers and scattered Thunderstorms.
Friday..West winds near 20 knots. Seas 2 to 5 feet. West of cosgrove shoal light, seas 4 to 5 feet building to 5 to 7 feet in the afternoon. NEarshore waters rough. Isolated showers.
Friday night..West winds near 20 knots. Seas 2 to 5 feet, except 6 to 8 feet west of cosgrove shoal light. NEarshore waters rough. Isolated showers.
Saturday..West winds 15 to 20 knots. Seas 2 to 5 feet. West of cosgrove shoal light, seas 6 to 8 feet subsiding to 5 to 7 feet in the afternoon. NEarshore waters choppy. Isolated showers.
Saturday night..Northwest winds 10 to 15 knots. Seas 2 to 4 feet, except 4 to 6 feet west of cosgrove shoal light. NEarshore waters a light to moderate chop. Isolated showers.
Sunday..Northwest to north winds 5 to 10 knots. Seas 1 to 3 feet, except 3 to 4 feet west of cosgrove shoal light. NEarshore waters smooth to a light chop.
Sunday night..North to northeast winds 5 to 10 knots. Seas 1 to 3 feet. NEarshore waters smooth to a light chop. Isolated showers.
Monday..Northeast winds 10 to 15 knots. Seas 1 to 3 feet. NEarshore waters a light to moderate chop. Isolated showers.
Monday night..Northeast to east winds 10 to 15 knots. Seas 1 to 2 feet. NEarshore waters a light to moderate chop. Isolated showers.
Tuesday and Tuesday night..Northeast winds 10 to 15 knots. Seas 1 to 2 feet. NEarshore waters a light to moderate chop. Isolated 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 281910 AFDKEY

Area Forecast Discussion National Weather Service Key West FL 310 PM EDT Thu Oct 28 2021

DISCUSSION. Water vapor imagery reveals the leading edge of the long- advertised frontal boundary is beginning to push towards the offshore southeast Gulf of Mexico coastal waters. Lightning networks are detecting a pretty coherent band of thunderstorms in a quasilinear, relatively storm structure. Ample daytime heating has allowed surface temperatures at most island communities to rise to the mid to upper 80s. In general, the forecast reasoning has not changed this iteration. The main forecast challenge will be whether there will be sufficient forcing for ascent to maintain this linear convective structure as it propagates through the CWA. Most convective allowing model (CAM) guidance does highlight the Florida Keys in the southern periphery of the line, albeit showing a general weakening trend from west to east. The general timing of this will be between 00z and 06z, although isolated activity may develop beforehand. More stratiform rain showers are expected behind the push of the main linear structure, likely lingering through much of the overnight hours.

Behind the frontal passage, a relatively tight pressure gradient will result in breezy to windy conditions for the Florida Keys for Friday and Saturday. Temperatures will drop a few degrees, but the main sensible weather change will be the much drier and comfortable conditions. Dewpoints may reach as low as the the lower 60s at many island locations on Saturday. A formidable ridge building across South Florida will result in low rain (and near- nil thunder) chances for much of the weekend and early next week.

MARINE. From synopsis, a Small Craft Advisory is in effect for all Florida Keys coastal waters. A frontal boundary will continue to approach the Florida Keys coastal waters this evening, resulting in freshening southwesterly to westerly breezes. The front will push through the marine zones of the Keys late this evening and overnight, with increased rain and thunder chances as the front passes. Fresh to strong breezes will prevail across the coastal waters through Saturday. Breezes will slacken Saturday night through early next week, with below normal rain, and near- nil thunder chances expected.

AVIATION. VFR conditions will prevail at both EYW and MTH island terminals through tomorrow with a period of sub-MVFR ceilings and sub-IFR visibilities likely for an extended period during the overnight hours. Confidence in shower and thunderstorm activity in association with a cold front sliding south is increasing, and strong thunderstorms are possible overnight. Have included a 12 hour period in the TAFs in which the shower activity will likely be impactful for both island terminals. There is minor concern of crosswinds at EYW as winds will remain elevated overnight and into tomorrow with frequent gusts of 20 to 25 knots out of the southwest.

CLIMATE. In 1913, the daily record rainfall of 2.25 inches was recorded. Rainfall records in Key West date back to 1871.

KEY WATCHES/WARNINGS/ADVISORIES. FL . None. GM . Small Craft Advisory until 5 AM EDT Friday for GMZ031>035- 042>044-052>055-072>075.



Public/Marine/Fire . BT Aviation/Nowcasts . Williams Data Acquisition . MRR

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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 mi61 min SSW 5.1G9.9 86°F 86°F1009.6 hPa
SMKF1 - Sombrero Key, FL 5 mi45 min SSW 16G19 83°F 1010 hPa78°F
LONF1 - Long Key, FL 16 mi45 min 15G18 84°F 1009.1 hPa78°F
KYWF1 - 8724580 - Key West, FL 39 mi61 min SW 8G13 87°F 85°F1009.7 hPa
SANF1 - Sand Key, FL 44 mi45 min SSW 14G16 83°F 1009.8 hPa77°F

Wind History for Vaca Key, FL
(wind in knots)    EDIT      (on/off)   Help
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
The Florida Keys - Marathon International Airport, FL4 mi62 minSSW 8 G 179.00 miPartly Cloudy85°F79°F82%1009.2 hPa

Link to 5 minute data for KMTH

Wind History from MTH (wind in knots)
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1 day agoW9W8W8W5W6W5W4W4W3W5NW4W5NW5NW3W5------------------
2 days ago----0000SW3000W4W4W4SW5SW5W4------W7W9W10W9W8

Tide / Current Tables for Boot Key Harbor, Vaca Key, Florida (2)
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Boot Key Harbor
Click for Map
Thu -- 12:10 AM EDT     Moonrise
Thu -- 01:43 AM EDT     2.20 feet High Tide
Thu -- 07:29 AM EDT     Sunrise
Thu -- 09:57 AM EDT     0.46 feet Low Tide
Thu -- 02:14 PM EDT     Moonset
Thu -- 04:06 PM EDT     Last Quarter
Thu -- 04:24 PM EDT     1.48 feet High Tide
Thu -- 06:46 PM EDT     Sunset
Thu -- 08:22 PM EDT     0.89 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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Tide / Current Tables for Moser Channel (swingbridge), Florida Current
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Moser Channel (swingbridge)
Click for Map
Thu -- 12:10 AM EDT     Moonrise
Thu -- 12:24 AM EDT     0.00 knots Slack
Thu -- 02:12 AM EDT     0.44 knots Max Flood
Thu -- 04:34 AM EDT     -0.00 knots Slack
Thu -- 07:29 AM EDT     Sunrise
Thu -- 08:51 AM EDT     -1.30 knots Max Ebb
Thu -- 12:36 PM EDT     0.00 knots Slack
Thu -- 02:14 PM EDT     Moonset
Thu -- 03:13 PM EDT     0.91 knots Max Flood
Thu -- 04:06 PM EDT     Last Quarter
Thu -- 06:46 PM EDT     Sunset
Thu -- 07:03 PM EDT     -0.00 knots Slack
Thu -- 10:05 PM EDT     -0.99 knots Max Ebb
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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Weather Map
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GEOS Local Image of    EDIT
NOTE: This section has been updated as of 1/26/2021. If the image you are expecting is not showing, please let me know. You may use the EDIT function to update your location.
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