Thursday, April25, 2019 L-36.com


Marine Weather and Tides
Duck Key, FL

Version 3.4
What's New / NOTES
10/6/2018 Colors of tide XTide graphs changed to emphasize that they were upgraded. See next note. Comments welcome.
10/4/2018 I have fixed XTide and updated the harmonic files. There were some name changes so you might have to click EDIT to find the new station name.

Sunrise 6:55AMSunset 7:54PM Thursday April 25, 2019 7:55 PM EDT (23:55 UTC) Moonrise 12:03AMMoonset 10:58AM Illumination 60% Phase: Waning Gibbous; Moon at 21 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:201904260230;;480447 Fzus52 Kkey 252034 Cwfkey Coastal Waters Forecast For The Florida Keys National Weather Service Key West Fl 434 Pm Edt Thu Apr 25 2019 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>044-260230- 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- 434 Pm Edt Thu Apr 25 2019
Tonight..Southeast to south winds near 10 knots, increasing to 10 to 15 knots. Seas 1 to 2 feet. NEarshore waters a light chop, becoming a light to moderate chop.
Friday..West winds 10 to 15 knots, increasing to 15 to 20 knots east of craig key. Seas 1 to 2 feet, building to 3 feet east of craig key. NEarshore waters a light to moderate chop, becoming choppy east of craig key. Isolated showers.
Friday night..West to northwest winds 10 to 15 knots, becoming north early in the morning. Seas 1 to 2 feet. NEarshore waters a light to moderate chop. Scattered showers and isolated Thunderstorms.
Saturday..Northeast winds 10 to 15 knots, becoming east to southeast 5 to 10 knots. Seas 1 to 3 feet. NEarshore waters a light to moderate chop, becoming smooth to a light chop. Scattered showers and isolated Thunderstorms.
Saturday night..East winds increasing to 10 to 15 knots. Seas building to 1 to 3 feet. NEarshore waters becoming a light to moderate chop. Scattered showers and isolated Thunderstorms.
Sunday..East winds near 10 knots. Seas 1 to 2 feet. NEarshore waters a light chop. Scattered showers and isolated Thunderstorms.
Sunday night and Monday..East winds 10 to 15 knots. Seas 1 to 3 feet. NEarshore waters a light to moderate chop. Scattered showers and isolated Thunderstorms.
Monday night..East winds near 15 knots. Seas 2 to 3 feet. NEarshore waters a moderate chop. Isolated showers.
Tuesday and Tuesday night..East to southeast winds 15 to 20 knots. Seas 2 to 4 feet. NEarshore waters choppy. Isolated showers.


7 Day Forecast for Marine Location Near Duck Key, FL
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location: 24.79, -80.88     debug


Area Discussion for - Key West, FL
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Fxus62 kkey 251906
afdkey
area forecast discussion
national weather service key west fl
306 pm edt Thu apr 25 2019

Discussion
Currently - high pressure centered just northeast of the bahamas
is producing gentle to moderate southeast breezes across the
florida keys and surrounding waters. Broad deep layered ridging
remains aligned over florida resulting in stable conditions. The
main subsidence inversion remains formidable with substantial dry
air through the lower and mid levels. Skies are a mix of mostly
clear to partly cloudy due to stratocumulus and thin cirrus. No
precipitation has been detected. Temperatures are slowly climbing
through 80 with dew points near 70.

Forecast - the high pressure to our northeast will continue to
work its way eastward into the atlantic as a low pressure system
moves into the eastern united states and gulf of mexico.

Meanwhile, an upper level trough will push east into the eastern
united states and the ridge axis near our area move out eastward.

This will result in low level winds veering more southerly by
tomorrow and accompanied warmer and more humid conditions. The
subsidence inversion will weaken substantially overnight, however
considerable dry air aloft will persist for some time. Expect rain
chances to edge upwards over the next couple of days from near
zero tonight to a low chance by tomorrow night ahead of a weak
cold front that will bleed through. Until then, temperatures will
remain above normal with climbing dew point temperatures.

Gentle winds will only briefly clock northward in wake of the
front Friday night, then quickly swing northeast to east on
Saturday as high pressure swings into the southeastern united
states. Consequently, only a small downward trend in temperatures
are expected and highs will be near normal with dew points in the
upper 60s on Saturday.

Through the remainder of the weekend, the high pressure system
will elongate eastward, maintaining gentle to moderate east
breezes. Expect temperatures quickly move back above normal with
dew points near 70. This high will be reinforced by another high
moving eastward off of the united states early next week. This
will result in freshening easterly breezes. Expect little to no
trend in temperatures or moisture through at least the middle of
next week. This healthy flow and marginal inhibition justifies at
least slight chance showers through the balance of the forecast.

Marine
Gentle winds will swing more southerly tonight then southwest
tomorrow as a high to our northeast moves eastward further into
the atlantic and a trough moves into the eastern gulf of mexico.

A weak cold front will bleed southward and stall across the
florida straits Friday night. Gentle winds will swing north to
northeast while surging briefly, then become light and variable
late Saturday. High pressure will set up off the atlantic coast
through early next week resulting in freshening easterly breezes.

A mix of cautions and advisories may be required for florida keys
waters beginning probably around Tuesday night.

Aviation
Vfr conditions expected to prevail at the island terminals. Surface
winds will remain near 12 kts or less, but should vary quite a bit
directionally. Winds look to back towards the east this evening,
then veer southward late tonight, then quickly westward tomorrow
morning as a weak cold front arrives. Cloud cover will also be on
the increase, but ceilings should remainVFR through 26 18z.

Preliminary point temps pops
Key west 77 84 74 84 - 10 30 30
marathon 77 87 75 87 - 10 30 30

Key watches warnings advisories
Fl... None.

Gm... None.

Public marine fire... 11
aviation nowcasts... .Wlc
data collection... ... Dr
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Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
PKYF1 - Peterson Key, FL 11 mi56 min 81°F
VCAF1 - 8723970 - Vaca Key, FL 13 mi38 min 79°F 82°F1014.4 hPa
LRKF1 - Little Rabbit Key, FL 14 mi116 min 85°F
SMKF1 - Sombrero Key, FL 17 mi66 min 78°F 1013.7 hPa (-0.8)69°F
JKYF1 - Johnson Key, FL 18 mi56 min 83°F
BOBF1 - Bob Allen, FL 19 mi56 min 81°F
WRBF1 - Whipray Basin, FL 21 mi56 min ESE 4.1 83°F
MUKF1 - Murray Key, FL 22 mi56 min 81°F
BKYF1 23 mi56 min 89°F
BNKF1 - Butternut Key, FL 28 mi56 min 81°F
LMDF1 - Little Madeira, FL 30 mi56 min 83°F
WWEF1 31 mi116 min 83°F
TRRF1 - Taylor River, FL 32 mi56 min 87°F
LRIF1 34 mi56 min 84°F
DKKF1 - Duck Key, FL 34 mi116 min 82°F
TCVF1 - Trout Cove, FL 35 mi116 min 86°F
CWAF1 36 mi116 min 85°F
BWSF1 - Blackwater Sound, FL 36 mi116 min 83°F
LBSF1 - Little Blackwater, FL 38 mi116 min 83°F
LSNF1 - Long Sound, FL 38 mi56 min 83°F
THRF1 39 mi116 min 82°F
HCEF1 - Highway Creek, FL 40 mi56 min 85°F
GBIF1 - Gunboat Island, FL 41 mi56 min 82°F
SREF1 41 mi56 min 82°F
MDKF1 43 mi56 min 84°F
TPEF1 - Tarpon Bay East, FL 43 mi116 min 83°F
CANF1 - Cane Patch, FL 44 mi56 min 81°F
HREF1 45 mi56 min 80°F
BDVF1 - Broad River, FL 48 mi56 min 82°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, FL10 mi63 minE 710.00 miFair84°F68°F59%1014.1 hPa

Wind History from MTH (wind in knots)
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Last 24hrE6E5E5E5E64SE7SE7SE6SE4SE7SE6SE6SE7S7S6SE6SE4SE5S6S8SE6SE6E7
1 day agoE9E10E7NE8E9E5E5E6E6E3NE3E3E6--NE7NE8N9NE7NE7E8E6SE6E5E5
2 days ago--E11E9E9E8E7E8E7E7E6E7E5E6NE9NE9NE13NE11NE12NE10
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Tide / Current Tables for Long Key Channel (West), Florida
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Long Key Channel (West)
Click for Map
Thu -- 01:03 AM EDT     Moonrise
Thu -- 02:36 AM EDT     -0.16 feet Low Tide
Thu -- 06:52 AM EDT     Sunrise
Thu -- 09:36 AM EDT     0.64 feet High Tide
Thu -- 11:58 AM EDT     Moonset
Thu -- 01:39 PM EDT     0.36 feet Low Tide
Thu -- 07:50 PM EDT     Sunset
Thu -- 08:24 PM EDT     1.13 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.30-0.1-0.1-0.10.10.30.40.50.60.60.60.50.40.40.40.60.80.91.11.11.110.8

Tide / Current Tables for Long Key Viaduct, Florida Current
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Long Key Viaduct
Click for Map
Thu -- 01:03 AM EDT     Moonrise
Thu -- 01:37 AM EDT     0.75 knots Max Flood
Thu -- 05:25 AM EDT     -0.00 knots Slack
Thu -- 06:52 AM EDT     Sunrise
Thu -- 08:32 AM EDT     -0.76 knots Max Ebb
Thu -- 11:51 AM EDT     0.00 knots Slack
Thu -- 11:58 AM EDT     Moonset
Thu -- 01:43 PM EDT     0.38 knots Max Flood
Thu -- 04:31 PM EDT     -0.00 knots Slack
Thu -- 07:50 PM EDT     Sunset
Thu -- 08:34 PM EDT     -0.94 knots Max Ebb
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.40.70.70.60.40.2-0.2-0.6-0.7-0.7-0.6-0.30.10.30.40.30.1-0.1-0.4-0.7-0.9-0.9-0.8-0.5

Weather Map and Satellite Images
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wmap_A
GOES 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.
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Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for Key West, FL (19,4,5,8)
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Ground Weather Radar Station Key West, FL
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Gulf Stream Current


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Disclaimer:
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 numerious 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.