Wednesday, January22, 2020
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Marine Weather and Tides
Cudjoe Key, FL

Version 3.4
NOTICE
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 6:06PM Wednesday January 22, 2020 9:55 AM EST (14:55 UTC) Moonrise 5:19AMMoonset 4:11PM Illumination 7% Phase: Waning Crescent; Moon at 27 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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GMZ032 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- 509 Am Est Wed Jan 22 2020
.small craft advisory in effect...
Today..Northwest to north winds 25 to 30 knots, decreasing to near 20 knots. Seas 3 to 6 feet. West of the marquesas keys, seas 7 to 9 feet, subsiding to 5 to 7 feet. NEarshore waters very rough.
Tonight..North to northeast winds 15 to 20 knots, decreasing to near 15 knots. Seas 2 to 5 feet, subsiding to 1 to 3 feet. West of the marquesas keys, seas 4 to 6 feet. NEarshore waters choppy, becoming a moderate chop.
Thursday..Northeast winds 10 to 15 knots. Seas 1 to 3 feet. NEarshore waters a light to moderate chop. Isolated showers.
Thursday night..Northeast to east winds decreasing to near 10 knots. Seas 1 to 2 feet. NEarshore waters becoming a light chop. Isolated showers.
Friday..East winds near 10 knots, becoming southwest. Seas 1 foot or less. NEarshore waters a light chop. Isolated showers.
Friday night..Southwest to west winds 5 to 10 knots, becoming northwest. Seas 1 foot or less. NEarshore waters smooth to a light chop. Isolated showers.
Saturday..Northwest to north winds 5 to 10 knots. Seas building to 1 to 3 feet. NEarshore waters smooth to a light chop. Isolated showers.
Saturday night..North winds 10 to 15 knots. Seas 1 to 3 feet. NEarshore waters a light to moderate chop. Isolated showers.
Sunday..North to northeast winds 10 to 15 knots. Seas 1 to 3 feet. NEarshore waters a light to moderate chop.
Sunday night..North to northeast 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 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 221003 AFDKEY

Area Forecast Discussion National Weather Service Key West FL 503 AM EST Wed Jan 22 2020

DISCUSSION. Currently - Strong cold northerly winds continue to blast the Keys this morning due to both a high pressure cell over the eastern United States and the Gulf of Mexico and a deepening low centered north of the Bahamas. Temperatures continue to fall this morning and now range broadly from the mid 50s in the Lower Keys to the mid 40s in the Upper Keys. Dew points are in the upper 30s to near 40, this is resulting in the lowest wind chill readings in the mid 30s in the Upper Keys. Needless to say, stable conditions prevail with a strong subsidence inversion based around 850 mb. The only cloud cover across the island chain is some stratocumulus in the Lower Keys and a more consolidated deck to the west and south.

Forecast - Over the next couple of days the low off Florida will swing further out into the Atlantic while the high over the eastern United States weakens and aligns over the Atlantic states. Consequently, local winds will begin trending downwards after sunrise. Windy conditions this morning will give way to breezy this afternoon. Winds will continue to relax and slowly veer more northeasterly over the next day or so. The cold northerlies will keep temperatures well below seasonable norms today, with day time temperatures just managing to scratch their way to near 60 and falling only a degree or two tonight. Dew point temperatures will fall a bit further into the mid 30s. Mostly clear conditions will prevail across most of the island chain with no chance for rain today. However, slight chances will return as increased low level moisture is slung southwestward around low north of the Bahamas.

The ridge to our north will expand eastward on Thursday and will attempt to turn light winds easterly. The very cool gulf and bay side waters will delay the timing of this veering, but turn and decouple they eventually will. Temperatures will slowly moderate back towards seasonal norms Thursday night and Friday and dew point temps will rise sharply into the 60s. Slight chances of rain will continue.

Heading towards the weekend, the ridge will shove off into the Atlantic. Meanwhile, a trough, associated with the next mid latitude low, will move into the eastern United States and extend into Florida and the eastern Gulf of Mexico. As a result, winds along the Keys will become light and varying. Winds will eventually shift northwest to north and strengthen moderately as the next cold front pushes through the area. Although there is a hint of upper level support and good low level moisture with the next front, CAPE is lacking and lower level flow is weak and not very supportive. For now will maintain slight chance of precipitation. Expect temperatures to fall some, but by only a couple of degrees.

MARINE. Strong high over the eastern United States and a deepening low north of the Bahamas continues to blast strong northerlies across Keys waters. A Small Craft Advisory remains in effect for all Keys waters. Winds will oscillate their way downwards today into tomorrow as the low moves out into the open Atlantic and the high weakens and moves into the eastern United States. The advisory will gradually be pared back as conditions warrant. Winds will continue to relax over the next couple of day, becoming light, and in some places variable by Friday. Another cold front is expected to push southward through the area on Saturday, resulting in winds shifting northerly and strengthening moderately.

AVIATION. VFR conditions will prevail at the island terminals through 23/12z. Strong crosswinds will continue to be the main impact this forecast, though speeds will gradually decrease this afternoon and evening as the direction veers slightly northeast. A warm occluded front will cause the shift in winds, ushering in increased low-level moisture with ceilings possibly becoming broken as low as 2000 ft.

PRELIMINARY POINT TEMPS/POPS. Key West 61 61 74 67 / 0 - 20 20 Marathon 61 61 74 66 / 0 - 20 20

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



Public/Marine/Fire . 11 Aviation/Nowcasts . WLC

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
KYWF1 - 8724580 - Key West, FL 18 mi56 min 1021.1 hPa
SMKF1 - Sombrero Key, FL 20 mi36 min N 23 G 28 50°F 41°F
VCAF1 - 8723970 - Vaca Key, FL 20 mi56 min N 9.9 G 17 51°F 62°F1020.4 hPa (+0.8)
SANF1 - Sand Key, FL 25 mi36 min N 19 G 25 53°F 43°F
42095 30 mi56 min 76°F4 ft
JKYF1 - Johnson Key, FL 42 mi116 min 53°F
LRKF1 - Little Rabbit Key, FL 42 mi176 min 57°F
MUKF1 - Murray Key, FL 43 mi116 min 54°F
PKYF1 - Peterson Key, FL 43 mi116 min 61°F
BKYF1 48 mi116 min 49°F
WRBF1 - Whipray Basin, FL 49 mi116 min WNW 19 55°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 mi2 hrsN 17 G 2610.00 miPartly Cloudy53°F37°F57%1020.6 hPa
Key West International Airport, FL16 mi63 minN 14 G 2110.00 miA Few Clouds54°F39°F59%1021.1 hPa
The Florida Keys - Marathon International Airport, FL24 mi63 minN 17 G 2310.00 miFair50°F35°F57%1020.4 hPa

Link to 5 minute data for KNQX

Wind History from NQX (wind in knots)
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2 days agoSE10S13S11S14S13S8S4S9SE9SE8N4N3------CalmCalmNW4N8N7N10N11N13N15

Tide / Current Tables for Gopher Key, Cudjoe Bay, Florida
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Gopher Key
Click for Map
Wed -- 02:26 AM EST     -0.29 feet Low Tide
Wed -- 05:18 AM EST     Moonrise
Wed -- 07:11 AM EST     Sunrise
Wed -- 08:17 AM EST     0.82 feet High Tide
Wed -- 01:25 PM EST     0.25 feet Low Tide
Wed -- 04:11 PM EST     Moonset
Wed -- 06:03 PM EST     Sunset
Wed -- 07:17 PM EST     1.65 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.1-0.2-0.3-0.3-0.10.20.40.70.80.80.70.50.40.30.30.50.91.21.51.61.61.51.20.8

Tide / Current Tables for No Name Key (northeast of), Florida Current
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No Name Key (northeast of)
Click for Map
Wed -- 12:02 AM EST     -1.05 knots Max Ebb
Wed -- 03:56 AM EST     0.00 knots Slack
Wed -- 05:18 AM EST     Moonrise
Wed -- 07:10 AM EST     Sunrise
Wed -- 07:20 AM EST     1.00 knots Max Flood
Wed -- 10:07 AM EST     -0.00 knots Slack
Wed -- 01:06 PM EST     -0.73 knots Max Ebb
Wed -- 04:10 PM EST     Moonset
Wed -- 04:36 PM EST     0.00 knots Slack
Wed -- 06:02 PM EST     Sunset
Wed -- 07:27 PM EST     0.58 knots Max Flood
Wed -- 09:33 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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-1-1-0.8-0.400.40.810.90.60.1-0.4-0.6-0.7-0.7-0.5-0.20.10.40.60.50.3-0.2-0.7

Weather Map
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wmap_A
GEOS Local Image of Southeast    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 (9,2,3,4)
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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 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.