Saturday, January16, 2021
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Marine Weather and Tides
Cudjoe Key, FL

Version 3.4
NOTICE
8/26/2020 The 7 day forecast is taking about 5 seconds to load but it will eventually load. NOAA is still working on it.
8/18/2020 NOAA continues to have trouble. Wind guest will occasionally be left off graphs. I am working with NOAA to resolve the issue.
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 6:02PM Saturday January 16, 2021 3:12 AM EST (08:12 UTC) Moonrise 9:56AMMoonset 9:32PM Illumination 9% Phase: Waxing Crescent; Moon at 3 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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GMZ035 Expires:202101160930;;984793 Fzus52 Kkey 160327 Cwfkey Coastal Waters Forecast For The Florida Keys National Weather Service Key West Fl 1027 Pm Est Fri Jan 15 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. Gmz032-035-160930- Bayside And Gulf Side From Craig Key To West End Of Seven Mile Bridge- Gulf Of Mexico From West End Of Seven Mile Bridge To Halfmoon Shoal Out To 5 Fathoms- 1027 Pm Est Fri Jan 15 2021
.small craft advisory in effect...
Overnight..Southwest winds 10 to 15 knots, becoming northwest and increasing to near 20 knots. Seas 1 to 2 feet, building to 2 to 4 feet. NEarshore waters a light to moderate chop, becoming rough. Scattered showers.
Saturday..Northwest winds 15 to 20 knots. Seas 2 to 4 feet, except 4 to 6 feet west of the marquesas keys. NEarshore waters choppy.
Saturday night..North winds decreasing to 10 to 15 knots. Seas 2 to 3 feet, except 4 to 6 feet west of the marquesas keys due to northwest swell. NEarshore waters becoming a light to moderate chop.
Sunday..North to northeast winds 5 to 10 knots. Seas 1 to 3 feet, except 3 to 4 feet west of the marquesas keys due to northwest swell. NEarshore waters smooth to a light chop.
Sunday night..North winds 5 to 10 knots. Seas 1 to 2 feet. NEarshore waters smooth to a light chop. Isolated showers.
Monday..North winds near 10 knots. Seas 1 to 2 feet. NEarshore waters a light chop. Isolated showers.
Monday night..Northeast winds increasing to 15 to 20 knots. Seas 1 to 3 feet, except building to 3 to 4 feet west of the marquesas keys. NEarshore waters becoming choppy.
Tuesday..Northeast to east winds 15 to 20 knots. Seas 1 to 3 feet, except 3 to 4 feet west of the marquesas keys. NEarshore waters choppy.
Tuesday night and Wednesday..Northeast to east winds near 15 knots. Seas 1 to 3 feet. NEarshore waters a moderate chop.
Wednesday night..East winds near 15 knots. Seas 1 to 3 feet. NEarshore waters a moderate chop.


7 Day Forecast for Marine Location Near Cudjoe Key, FL
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location: 24.64, -81.48     debug


Area Discussion for - Key West, FL
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FXUS62 KKEY 160301 AFDKEY

Area Forecast Discussion National Weather Service Key West FL 1001 PM EST Fri Jan 15 2021

DISCUSSION. The deep and broad belt of westerlies persist across the Gulf of Mexico, south of a large storm system lumbering to the east through the Ohio River Valley. A cold front continues to press southeast through the Southeastern Gulf of Mexico. Northwest winds average 20 to 25 knots behind the front, accentuated by Buoy 42003 which gusted in the low 30s for several hours. Locally, breezes have finally shifted to the west of south, although most locations are 10 knots or less. Prefrontal convection continues to struggle to the west and southwest of the Lower Keys, with tops limited to around 20 kft. Temperatures are in the lower 70s and dewpoints are in the upper 60s. The dewpoint on top of our building is 70--every degree matters for ML CAPE.

The forecast calls for slight rain chances (20%) overnight. The 00Z KKEY RAOB sampled a thin inversion near 9 kft, but given the tops of the showers right now, there appears to be no problems getting past this inhibiting layer. The profile is not that dry, and lapse rates steepen above 20 kft. We would not be surprised if an overachieving collision was able to produce a brief thunderstorm. Given the upstream observations and similar water temperatures to the north of the island chain, the statistical guidance, and the ensemble mean predictions, northwest winds should increase to near 20 knots for a few hours behind the frontal passage. The initial wind shift should be between 07-09Z. Other than the addition of a brief Small Craft Advisory, no other changes needed.

MARINE. Small Craft Advisory likely will be required tonight due to northwest winds a little stronger than expected. From synopsis, a cold front will push through the coastal waters of the Florida Keys tonight. Fresh northwest breezes will prevail behind the front on Saturday, then become north and diminish Saturday night. High pressure will move slowly east along the northern Gulf Coast Sunday through Monday, with gentle north to northeast breezes prevailing across the Keys. This high will push eastwards into the Atlantic Monday night and Tuesday resulting in strengthening northeast to east breezes.

AVIATION. MVFR CIGS are likely around 09Z as the cold front presses through the EYW and MTH terminals. Also, EYW can expect some VIS reduction in the next hour or two as showers move through. Behind the front, northwest winds will gust to 20 to 22 knots. There appears to be some disagreement to when the gusts will end on Saturday, and may persist well into the afternoon.

PRELIMINARY POINT TEMPS/POPS. Key West 64 69 60 69 / 20 - 0 - Marathon 64 70 59 68 / 20 - 0 0

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

Public/Marine/Fire . CLR Aviation/Nowcasts . CLR Data Acquisition . DR

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
KYWF1 - 8724580 - Key West, FL 18 mi54 min NW 9.9 G 14 70°F 69°F1014.1 hPa
VCAF1 - 8723970 - Vaca Key, FL 20 mi54 min W 12 G 14 71°F 70°F1013.1 hPa
SANF1 - Sand Key, FL 25 mi32 min WNW 13 G 16 70°F 1014.2 hPa66°F
42095 30 mi42 min 71°F 74°F3 ft
JKYF1 - Johnson Key, FL 42 mi72 min 70°F
LRKF1 - Little Rabbit Key, FL 42 mi132 min 69°F
MUKF1 - Murray Key, FL 43 mi72 min 68°F
PKYF1 - Peterson Key, FL 43 mi72 min 69°F
BKYF1 48 mi72 min 71°F
WRBF1 - Whipray Basin, FL 49 mi72 min S 9.9 70°F

Wind History for Key West, FL
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Key West Naval Air Station, FL12 mi19 minNW 1010.00 miPartly Cloudy69°F67°F93%1013.7 hPa
Key West International Airport, FL16 mi19 minNW 1010.00 miMostly Cloudy69°F66°F90%1014 hPa
The Florida Keys - Marathon International Airport, FL24 mi19 minWNW 1010.00 miMostly Cloudy68°F65°F90%1013 hPa

Link to 5 minute data for KNQX

Wind History from NQX (wind in knots)
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Last 24hrNE4N6N4N11N9N8N955E5SE6E5SE6SE53SE8S7S6S5NW11
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1 day agoNE6NE7N9N9N10NE10N11NE13NE13NE13--NE11NE9NE9NE7N7N10N5NE5NE6NE4N5N7N6
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Tide / Current Tables for Gopher Key, Cudjoe Bay, Florida
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Gopher Key
Click for Map
Sat -- 06:16 AM EST     -0.19 feet Low Tide
Sat -- 07:11 AM EST     Sunrise
Sat -- 09:55 AM EST     Moonrise
Sat -- 11:39 AM EST     0.97 feet High Tide
Sat -- 05:47 PM EST     0.12 feet Low Tide
Sat -- 05:59 PM EST     Sunset
Sat -- 09:32 PM EST     Moonset
Sat -- 11:17 PM EST     1.48 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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1.51.30.90.50.2-0.1-0.2-0.10.10.40.70.910.90.70.50.30.20.10.30.611.31.5

Tide / Current Tables for No Name Key (northeast of), Florida Current
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No Name Key (northeast of)
Click for Map
Sat -- 01:00 AM EST     -0.00 knots Slack
Sat -- 03:59 AM EST     -1.10 knots Max Ebb
Sat -- 07:11 AM EST     Sunrise
Sat -- 07:44 AM EST     0.00 knots Slack
Sat -- 09:54 AM EST     Moonrise
Sat -- 11:01 AM EST     0.81 knots Max Flood
Sat -- 01:49 PM EST     -0.00 knots Slack
Sat -- 04:29 PM EST     -0.89 knots Max Ebb
Sat -- 05:59 PM EST     Sunset
Sat -- 08:10 PM EST     0.00 knots Slack
Sat -- 09:31 PM EST     Moonset
Sat -- 11:10 PM EST     0.60 knots Max Flood
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.40-0.5-1-1.1-1-0.7-0.30.10.50.70.80.70.4-0.1-0.6-0.9-0.9-0.7-0.4-0.10.30.50.6

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

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Ground Weather Radar Station



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.