Wednesday, April21, 2021
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Marine Weather and Tides
Key West, 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 6:58AMSunset 7:53PM Wednesday April 21, 2021 7:15 AM EDT (11:15 UTC) Moonrise 1:26PMMoonset 2:19AM Illumination 70% Phase: Waxing Gibbous; Moon at 9 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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GMZ044 Hawk Channel From West End Of Seven Mile Bridge To Halfmoon Shoal Out To The Reef- 429 Am Edt Wed Apr 21 2021
Today..Southwest winds 10 to 15 knots, becoming west to northwest during the mid to late afternoon. Seas 2 to 4 feet early, subsiding to 1 to 3 feet. NEarshore waters a light to moderate chop. Scattered showers and isolated Thunderstorms developing this afternoon.
Tonight..Northwest winds 10 to 15 knots, becoming north and increasing to near 15 knots. Seas building to 2 to 4 feet. NEarshore waters a light to moderate chop, becoming a moderate chop. Scattered showers and isolated Thunderstorms early in the evening, then isolated showers.
Thursday..North to northeast winds near 15 knots, becoming northeast and decreasing to near 10 knots. Seas 2 to 4 feet, subsiding to 1 to 3 feet. NEarshore waters a moderate chop, becoming a light chop. Isolated showers.
Thursday night..Northeast to east winds increasing to near 15 knots. Seas 1 to 3 feet. NEarshore waters a light to moderate chop. Isolated showers.
Friday..East winds 15 to 20 knots. Seas 3 to 4 feet. NEarshore waters choppy. Isolated showers.
Friday night..East to southeast winds 15 to 20 knots. Seas 3 to 4 feet. NEarshore waters choppy. 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 2 to 3 feet. NEarshore waters a light to moderate chop. Isolated showers.
Sunday..Southwest to west winds 5 to 10 knots. Seas 1 to 2 feet. NEarshore waters smooth to a light chop. Isolated showers.
Sunday night..Northwest to north winds 5 to 10 knots. Seas 1 foot or less. NEarshore waters smooth to a light chop. Isolated showers.


7 Day Forecast for Marine Location Near Key West, FL
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location: 24.55, -82.13     debug


Area Discussion for - Key West, FL
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FXUS62 KKEY 210907 AFDKEY

Area Forecast Discussion National Weather Service Key West FL 507 AM EDT Wed Apr 21 2021

DISCUSSION. CURRENTLY. Under mostly cloudy skies and southwest winds of 5 to 10 mph, temperatures are in the upper 70s along the Island Chain. Meanwhile, local radars are not detecting any significant precipitation echoes in our area. On our marine district, winds southwest to west varying from 2 knots at Smith Shoal Light to 12 knots to Carysfort Reef Light.

SHORT TERM. (Today through Friday night) A surface trough in the extreme Southeast Gulf of Mexico early this morning, will limp through the Florida Keys by late this afternoon. Meanwhile, a mid and upper level pertubation will lag well behind the surface boundary, before passing through our entire region late tonight. So despite plenty of moisture, subtle low level convergence with an absence of large scale ascent. With that, expect a swath of showers and a few thunderstorms will migrate southeastward, but decay as it approaches the Island Chain. Hence, only low chance pops will be kept beginning this afternoon, with only isolated pops due to dry air filtering into our area tonight through the rest of this week. Outside of slightly cooler and drier air with high temperatures in the lower 80s on Thursday, temperatures will be about 5 degrees above normal otherwise.

LONG TERM. (Saturday through Tuesday) A large and expansive region of high pressure centered over the Western Atlantic Ocean with a ridge axis extending across the Sunshine State on Saturday will settle equatorward to near our region Saturday night, before retreating eastward as a trough dissipates in South Florida Sunday. Thereafter, another large and sprawling area of high pressure over the Eastern United States will press southward into the Sunshine State and the adjacent Atlantic and Gulf waters. Given large scale anticylonic flow, moisture will predominately be found below 850 mb with no mid and upper level disturbances anticipated. With that, only isolated 10 to 20 pops will be carried. Otherwise, temperatures will remain above normal.

MARINE. Light to gentle southwest winds will clock around to northwest by this evening, before moderate north winds overspread our marine district overnight. Moderate north to northeast winds will turn northeast and slacken into the light range Thursday afternoon. Beyond that, northeast to east winds will freshen late thursday night, with fresh winds expected on Friday and Friday night. For this weekend, moderate southeast winds will abate by Friday.

AVIATION. MVFR ceilings may prevail early this morning at EYW, otherwise VFR is expected to prevail at both EYW and MTH today. Showers and a few thunderstorms are expected to develop mainly west and north of the island chain, but possibly encroach on the terminals this afternoon. Vicinity showers are currently indicated this afternoon. Winds will oscillate from near calm to south to southwest mainly less than 10 knots early this morning, then become west and eventually northwest 8 to 12 knots throughout the day and into the evening.

CLIMATE. In 1987, the daily record low temperature of 63 degrees was recorded in Key West. Temperature records date back to 1872.

PRELIMINARY POINT TEMPS/POPS. Key West 83 73 81 76 / 40 10 10 10 Marathon 87 72 82 76 / 30 10 10 10

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

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

Visit us on the web at weather.gov/key

Follow us on Facebook and Twitter at: www.facebook.com/nwskeywest www.twitter.com/nwskeywest


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
42095 13 mi46 min 78°F 78°F4 ft
SANF1 - Sand Key, FL 15 mi26 min SSW 5.1 G 5.1 79°F 1015.5 hPa74°F
KYWF1 - 8724580 - Key West, FL 17 mi46 min SW 1.9 G 4.1 79°F 81°F1015.3 hPa
GKYF1 40 mi76 min 76°F

Wind History for Key West, FL
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Key West International Airport, FL20 mi23 minWSW 59.00 miMostly Cloudy80°F74°F82%1015.2 hPa
Key West Naval Air Station, FL23 mi83 minSW 59.00 miMostly Cloudy78°F76°F93%1014.8 hPa

Link to 5 minute data for KEYW

Wind History from EYW (wind in knots)
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Last 24hr------------------------------------------------
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2 days ago------------------------------------------------

Tide / Current Tables for Sand Key Lighthouse, Sand Key Channel, Florida (2)
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Sand Key Lighthouse
Click for Map
Wed -- 03:18 AM EDT     Moonset
Wed -- 05:58 AM EDT     0.88 feet High Tide
Wed -- 07:00 AM EDT     Sunrise
Wed -- 10:21 AM EDT     0.55 feet Low Tide
Wed -- 02:24 PM EDT     Moonrise
Wed -- 04:34 PM EDT     1.39 feet High Tide
Wed -- 07:52 PM EDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.10.20.40.60.70.80.90.80.70.60.60.60.70.91.11.31.41.41.31.10.90.60.30.1

Tide / Current Tables for Boca Grande Channel, Florida Current
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Boca Grande Channel
Click for Map
Wed -- 02:34 AM EDT     0.86 knots Max Flood
Wed -- 03:19 AM EDT     Moonset
Wed -- 06:39 AM EDT     -0.00 knots Slack
Wed -- 07:00 AM EDT     Sunrise
Wed -- 09:47 AM EDT     -0.81 knots Max Ebb
Wed -- 12:34 PM EDT     0.00 knots Slack
Wed -- 02:25 PM EDT     Moonrise
Wed -- 02:54 PM EDT     0.65 knots Max Flood
Wed -- 06:19 PM EDT     -0.00 knots Slack
Wed -- 07:53 PM EDT     Sunset
Wed -- 09:55 PM EDT     -1.08 knots Max Ebb
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.10.60.80.80.70.60.3-0.1-0.5-0.7-0.8-0.7-0.30.20.60.70.60.40.1-0.3-0.7-1-1.1-0.9

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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