Monday, April19, 2021
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Marine Weather and Tides
Key Colony Beach, FL

Version 3.4
NOTICE
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 7:00AMSunset 7:52PM Monday April 19, 2021 6:14 PM EDT (22:14 UTC) Moonrise 11:25AMMoonset 12:40AM Illumination 55% Phase: First Quarter Moon; Moon at 8 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:202104200230;;809908 Fzus52 Kkey 192020 Cwfkey Coastal Waters Forecast For The Florida Keys National Weather Service Key West Fl 420 Pm Edt Mon Apr 19 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>044-200230- 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- 420 Pm Edt Mon Apr 19 2021
Tonight..Southwest to west winds 5 to 10 knots, becoming south and increasing to near 15 knots. Seas 1 to 2 feet, building to 2 to 3 feet. NEarshore waters smooth to a light chop, becoming a moderate chop. Scattered showers and isolated Thunderstorms, then isolated showers and Thunderstorms late.
Tuesday..South to southwest winds 15 to 20 knots, decreasing to near 10 knots in the afternoon. Seas 2 to 4 feet, subsiding to 1 to 2 feet. NEarshore waters choppy, becoming a light chop. Isolated showers and Thunderstorms.
Tuesday night..South to southwest winds near 10 knots. Seas 1 to 2 feet. NEarshore waters a light chop. Scattered showers.
Wednesday..Southwest winds 10 to 15 knots, becoming west during the afternoon. Seas 1 to 3 feet. NEarshore waters a light to moderate chop. Scattered showers and isolated Thunderstorms.
Wednesday night..West to northwest winds 10 to 15 knots, becoming northwest to north 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. Scattered showers and isolated Thunderstorms in the evening, then isolated showers after midnight.
Thursday..North to northeast winds near 10 knots. Seas 1 to 2 feet. NEarshore waters a light chop. Isolated showers.
Thursday night..Northeast to east winds near 10 knots, increasing to 10 to 15 knots. Seas 1 to 2 feet, building to 1 to 3 feet. NEarshore waters a light chop, becoming a light to moderate chop. Isolated showers.
Friday..East winds 10 to 15 knots. Seas 2 to 3 feet. NEarshore waters a light to moderate chop. Isolated showers.
Friday night..East to southeast winds near 15 knots. Seas 2 to 3 feet. NEarshore waters a moderate chop. Isolated showers.
Saturday..Southeast winds near 15 knots. Seas 2 to 3 feet. NEarshore waters a moderate chop. Isolated showers.
Saturday night..Southeast to south winds 10 to 15 knots. Seas 1 to 3 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 191946 AFDKEY

Area Forecast Discussion National Weather Service Key West FL 346 PM EDT Mon Apr 19 2021

DISCUSSION. A stalled frontal boundary over South Florida and the southeastern Gulf of Mexico has been the focus of scattered thunderstorms for the last several hours. The Florida Keys remain to the south of the confluent and moist southwesterly flow. Given the lack of low level cumulus on visible satellite imagery, the Cuban shadow sampled by this morning's KKEY RAOB is still intact. Also, occasional ripples in the alto cumulus fields hint at other inversions above the low level inversion. Temperatures across the island chain range from the lower to upper 80s, with dewpoints in the upper 70s. The KBYX radar is echo free around the Florida Keys, although there are two areas of recent convective development, one to the west of the Ten Thousand Islands, and the other over western Cuba.

FORECAST. The main forecast highlights will be the 50% rain chances for tonight, as multiple modes of convective initiation converge on the Keys. First, western Cuba should send out some scouts in the next few hours, out into a primed, yet weakly inhibited atmosphere. There are broad patches of sunshine now poking through, which should maintain the instability into the late afternoon and early evening. Second, the line of storms over the southeastern Gulf of Mexico should have some southward propagation, building upshear into the Gulf waters north of the Lower and Middle Keys. And finally, the frontal boundary may waffle to the south as Florida cools off this evening. All three of these mechanisms should result in good rain and thunder chances this evening through a few hours after midnight. The frontal boundary will waffle back to the north late tonight, then slowly degrade Tuesday and Tuesday night. A weak area of low pressure developing east of the Atlantic Bight will drive what's left of the boundary to the south Tuesday night through Wednesday night, with rain/thunder chances maintained as weak convergence along the front pushes through the Keys. Behind the front, late Wednesday night and Thursday, a little drier air (dewpoints in the upper 60s) and rain chances near nil will prevail. Mean layer subsidence and a return to moderate to fresh east to southeast breezes are expected by Friday or Friday night. Another frontal boundary will stall across the southeastern Gulf of Mexico by day 6 or 7--tis the season.

MARINE. There are no watches, warnings, or advisories currently in effect for the coastal waters of the Florida Keys. A frontal boundary stalled over South Florida and the southeastern Gulf of Mexico will focus showers and thunderstorms tonight through Tuesday. This weakening boundary will slide south Tuesday night and Wednesday. In the wake of the front, gentle to moderate northerly breezes on Thursday will veer toward the northeast to east and freshen by Thursday night. East to southeast breezes will return Friday or Friday night.

AVIATION. VFR conditions will prevail this evening and overnight at both MTH and EYW. The potential for VCTS remains uncertain and has not been introduced in the TAFs at this time. Shower activity is expected increase this evening and overnight, therefore adjustments will be made as needed with the potential for amendments and TEMPOs.

PRELIMINARY POINT TEMPS/POPS. Key West 77 85 76 83 / 50 20 30 30 Marathon 77 88 77 86 / 50 10 30 30

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

Public/Marine/Fire . CLR Aviation/Nowcasts . Williams Data Acquisition . KR

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 mi56 min W 4.1 G 7 85°F 85°F1012.3 hPa
SMKF1 - Sombrero Key, FL 5 mi44 min SW 5.1 G 5.1 80°F 1012.7 hPa76°F
LONF1 - Long Key, FL 16 mi44 min 8.9 G 11 83°F 1012.8 hPa76°F
PKYF1 - Peterson Key, FL 24 mi74 min 85°F
LRKF1 - Little Rabbit Key, FL 24 mi134 min 86°F
JKYF1 - Johnson Key, FL 27 mi74 min 87°F
MUKF1 - Murray Key, FL 29 mi74 min 86°F
BKYF1 32 mi74 min 89°F
BOBF1 - Bob Allen, FL 32 mi74 min 86°F
WRBF1 - Whipray Basin, FL 32 mi74 min S 14 88°F
GBTF1 - Garfield Bight, FL 36 mi74 min 87°F
TBYF1 37 mi74 min 87°F
WWEF1 38 mi134 min 85°F
KYWF1 - 8724580 - Key West, FL 39 mi56 min W 4.1 G 6 85°F 82°F1012.5 hPa
BNKF1 - Butternut Key, FL 41 mi74 min 85°F
LMDF1 - Little Madeira, FL 41 mi74 min 85°F
CWAF1 42 mi134 min 85°F
LRIF1 42 mi74 min 86°F
TRRF1 - Taylor River, FL 43 mi74 min 86°F
SANF1 - Sand Key, FL 44 mi44 min W 2.9 G 4.1 81°F 1012.6 hPa74°F
NRRF1 45 mi74 min 86°F
SREF1 45 mi74 min 83°F
DKKF1 - Duck Key, FL 46 mi134 min 84°F
TCVF1 - Trout Cove, FL 46 mi74 min 86°F
JBYF1 47 mi74 min 85°F
GBIF1 - Gunboat Island, FL 47 mi74 min 83°F
BWSF1 - Blackwater Sound, FL 48 mi134 min 85°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 mi21 minWSW 79.00 miPartly Cloudy88°F73°F61%1012.2 hPa

Link to 5 minute data for KMTH

Wind History from MTH (wind in knots)
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1 day agoNW4NW4CalmE3SE3SE3S3S3S6S6S6S7S6S63S4S4S6S8S6S7SE6SE5SE6
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Tide / Current Tables for Boot Key Harbor, Vaca Key, Florida (2)
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Boot Key Harbor
Click for Map
Mon -- 01:40 AM EDT     Moonset
Mon -- 03:27 AM EDT     0.94 feet High Tide
Mon -- 06:58 AM EDT     Sunrise
Mon -- 07:17 AM EDT     0.53 feet Low Tide
Mon -- 12:24 PM EDT     Moonrise
Mon -- 01:53 PM EDT     1.73 feet High Tide
Mon -- 07:48 PM EDT     Sunset
Mon -- 10:10 PM EDT     0.06 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.50.70.80.90.90.80.60.50.60.70.91.21.51.71.71.71.51.20.90.60.30.10.10.1

Tide / Current Tables for Moser Channel (swingbridge), Florida Current
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Moser Channel (swingbridge)
Click for Map
Mon -- 01:40 AM EDT     Moonset
Mon -- 02:22 AM EDT     1.07 knots Max Flood
Mon -- 06:13 AM EDT     -0.00 knots Slack
Mon -- 06:58 AM EDT     Sunrise
Mon -- 09:05 AM EDT     -0.96 knots Max Ebb
Mon -- 12:24 PM EDT     Moonrise
Mon -- 12:39 PM EDT     0.00 knots Slack
Mon -- 02:32 PM EDT     0.49 knots Max Flood
Mon -- 04:54 PM EDT     -0.00 knots Slack
Mon -- 07:48 PM EDT     Sunset
Mon -- 09:11 PM EDT     -1.39 knots Max Ebb
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.20.7110.80.50.1-0.4-0.8-1-0.9-0.6-0.30.10.40.50.2-0-0.3-0.8-1.2-1.4-1.3-1

Weather Map
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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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