Wednesday, March20, 2019 L-36.com


Marine Weather and Tides
Marathon, 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 7:29AMSunset 7:39PM Wednesday March 20, 2019 5:08 PM EDT (21:08 UTC) Moonrise 6:26PMMoonset 6:20AM Illumination 100% Phase: Full Moon; Moon at 15 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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GMZ053 Expires:201903210230;;666717 Fzus52 Kkey 202023 Cwfkey Coastal Waters Forecast For The Florida Keys National Weather Service Key West Fl 423 Pm Edt Wed Mar 20 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. Gmz052>055-072>075-210230- Straits Of Florida From Ocean Reef To Craig Key Out 20 Nm- Straits Of Florida From Craig Key To West End Of Seven Mile Bridge Out 20 Nm- Straits Of Florida From West End Of Seven Mile Bridge To South Of Halfmoon Shoal Out 20 Nm- Straits Of Florida From Halfmoon Shoal To 20 Nm West Of Dry Tortugas Out 20 Nm- Straits Of Florida From Ocean Reef To Craig Key 20 To 60 Nm Out- Straits Of Florida From Craig Key To West End Of Seven Mile Bridge 20 To 60 Nm Out- Straits Of Florida From West End Of Seven Mile Bridge To South Of Halfmoon Shoal 20 To 60 Nm Out- Straits Of Florida From Halfmoon Shoal To 20 Nm West Of Dry Tortugas 20 To 60 Nm Out- 423 Pm Edt Wed Mar 20 2019
Tonight..Northwest to north winds 10 to 15 knots, becoming north to northeast. Seas 2 to 4 feet. Isolated showers.
Thursday..North winds near 15 knots. Seas 2 to 4 feet. Isolated showers.
Thursday night..North winds 15 to 20 knots. Seas 3 to 5 feet.
Friday..North to northeast winds 15 to 20 knots, decreasing to near 10 knots in the afternoon. Seas 2 to 5 feet.
Friday night..North to northeast winds near 10 knots. Seas 2 to 3 feet.
Saturday..Northeast to east winds near 10 knots. Seas 1 to 3 feet.
Saturday night..East winds 10 to 15 knots. Seas 2 to 4 feet. Isolated showers.
Sunday..East winds near 15 knots. Seas 3 to 5 feet. Isolated showers.
Sunday night..East winds near 15 knots. Seas 3 to 5 feet. Isolated showers.
Monday..Northeast winds near 10 knots. Seas 1 to 3 feet. Isolated showers.
Monday night..Northwest to north winds near 10 knots. Seas 1 to 2 feet. Isolated showers.


7 Day Forecast for Marine Location Near Marathon, FL
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location: 24.73, -81.03     debug


Area Discussion for - Key West, FL
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Fxus62 kkey 201853
afdkey
area forecast discussion
national weather service key west fl
253 pm edt Wed mar 20 2019

Discussion
Currently - a complicated trough is in place across the united
states, however the jet stream is well off too the north and is
rather zonal at the moment. A surface area of low pressure is now
consolidating to the northeast of the bahamas while high pressure
is building from texas into the gulf of mexico. Local winds are
gentle to moderate out of the north. This flow is keeping cool
conditions in place and highs are struggling to reach into the mid
70s with dew points holding in the mid 60s. Only a few showers
have been present over the outer florida straits. However, skies
remain mostly cloudy due to blankets of stratocumulus.

Forecast - a shortwave trough will swing around a larger trough to
our north then out into the atlantic tonight into tomorrow. This
will open the door for a surface ridge to build down the plains
into the gulf of mexico. Gentle to moderate north breezes will
continue tonight into tomorrow. Expect winds to surge tomorrow
afternoon of the florida gulf coast then a nocturnal surge
tomorrow night. Wind will then relax and clock northeast Friday
into Saturday. This steady injection of cooler air will result in
a downward trend in temperatures, bottoming broadly in the lower
60s Saturday morning. Rain chances will remain slim to none
through this period.

Through the weekend into early next week the surface high will
move into the eastern united states then exit into the atlantic
off the southeastern united states coast. Winds will continue to
shift around more easterly, maintaining gentle to moderate speeds.

Expect temperatures to gradually climb back towards seasonal
norms. Rain chances will remain slim.

Marine
High pressure building down the plains into the gulf of mexico
will result in primarily gentle to moderate north breezes
tonight. A tighter pressure gradient arriving around the
southeastern periphery of the high, along with a coastal wind
surge will result in winds strengthen to moderate to fresh over
portions of keys waters tomorrow afternoon, then a nocturnal cool
drainage surge Friday morning. Through the weekend, the high
pressure system will migrate eastward into the eastern united
states and then out into the atlantic. Primarily gentle to
moderate breezes will gradually clock northeast then east through
this period.

Aviation
This afternoon and tonight,VFR conditions will prevail at both the
keyw and kmth int'l island terminals. Expect just a few-scattered
cumulus AOA fl015 and fl020-025 respectively, but brief MVFR cigs
are still possible at either both terminals till about 20z. Winds
will decrease from between 360 and 010 degrees AOA 10 to 12 knots
to AOA 6 knots after sunset.

Climate
Key watches warnings advisories
Fl... None.

Gm... None.

Public marine fire... 11
aviation nowcasts... .Futterman
data collection... ... Sdr
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Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
VCAF1 - 8723970 - Vaca Key, FL 4 mi39 min 73°F 76°F1014.1 hPa
SMKF1 - Sombrero Key, FL 8 mi79 min 72°F 1013.9 hPa (-1.8)65°F
LRKF1 - Little Rabbit Key, FL 20 mi129 min 75°F
PKYF1 - Peterson Key, FL 20 mi69 min 76°F
JKYF1 - Johnson Key, FL 23 mi69 min 73°F
MUKF1 - Murray Key, FL 26 mi69 min 75°F
BOBF1 - Bob Allen, FL 28 mi69 min 76°F
WRBF1 - Whipray Basin, FL 28 mi69 min NW 8 75°F
BKYF1 29 mi69 min 77°F
GBTF1 - Garfield Bight, FL 33 mi69 min 76°F
TBYF1 34 mi69 min 75°F
WWEF1 35 mi129 min 73°F
LMDF1 - Little Madeira, FL 37 mi69 min 75°F
BNKF1 - Butternut Key, FL 37 mi69 min 75°F
TRRF1 - Taylor River, FL 39 mi69 min 78°F
LRIF1 39 mi69 min 75°F
CWAF1 39 mi129 min 75°F
MLRF1 - Molasses Reef, FL 40 mi69 min NE 7 G 8 74°F 78°F1013.9 hPa (-1.7)
NRRF1 42 mi69 min 73°F
DKKF1 - Duck Key, FL 42 mi129 min 75°F
TCVF1 - Trout Cove, FL 43 mi129 min 75°F
SREF1 43 mi69 min 75°F
KYWF1 - 8724580 - Key West, FL 43 mi39 min WNW 15 G 18 73°F 78°F1014.9 hPa
BWSF1 - Blackwater Sound, FL 44 mi129 min 75°F
GBIF1 - Gunboat Island, FL 45 mi69 min 75°F
LSNF1 - Long Sound, FL 46 mi69 min 76°F
LBSF1 - Little Blackwater, FL 46 mi129 min 75°F
TPEF1 - Tarpon Bay East, FL 47 mi129 min 75°F
HREF1 48 mi69 min 75°F
THRF1 48 mi129 min 76°F
CANF1 - Cane Patch, FL 48 mi69 min 75°F
HCEF1 - Highway Creek, FL 48 mi129 min 75°F
SANF1 - Sand Key, FL 49 mi79 min 71°F 1015.1 hPa (-1.6)61°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, FL1 mi76 minNNW 810.00 miMostly Cloudy79°F66°F65%1014.1 hPa

Wind History from MTH (wind in knots)
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Last 24hrNE16NE13NE16NE13N11
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NE13NE11NE12NE8NE7N11N11N10N10N10N10N10N8NW6N9NW8NW9
1 day agoN7NE9NE10N9NE11NE11NE11NE13NE13NE13NE15
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2 days agoNW5NW5W4W4NW3CalmNW5N7N7N7N6NE5N8NE6NE8NE9E9NE9NE9NE8NE7NE7NE6N5

Tide / Current Tables for Vaca Key-Fat Deer Key bridge, Florida
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Vaca Key-Fat Deer Key bridge
Click for Map
Wed -- 03:20 AM EDT     -0.24 feet Low Tide
Wed -- 07:20 AM EDT     Moonset
Wed -- 07:28 AM EDT     Sunrise
Wed -- 09:19 AM EDT     1.35 feet High Tide
Wed -- 03:21 PM EDT     -0.18 feet Low Tide
Wed -- 07:26 PM EDT     Moonrise
Wed -- 07:35 PM EDT     Sunset
Wed -- 09:32 PM EDT     1.71 feet High Tide
Wed -- 09:43 PM EDT     Full Moon
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.80.3-0.1-0.2-0.20.10.40.81.21.31.31.10.70.30-0.2-0.10.20.61.11.41.71.71.5

Tide / Current Tables for Moser Channel (swingbridge), Florida Current
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Moser Channel (swingbridge)
Click for Map
Wed -- 12:01 AM EDT     -0.00 knots Slack
Wed -- 03:17 AM EDT     -2.76 knots Max Ebb
Wed -- 06:34 AM EDT     0.00 knots Slack
Wed -- 07:20 AM EDT     Moonset
Wed -- 07:28 AM EDT     Sunrise
Wed -- 09:33 AM EDT     2.18 knots Max Flood
Wed -- 12:33 PM EDT     -0.00 knots Slack
Wed -- 03:41 PM EDT     -2.59 knots Max Ebb
Wed -- 06:51 PM EDT     0.01 knots Slack
Wed -- 07:26 PM EDT     Moonrise
Wed -- 07:35 PM EDT     Sunset
Wed -- 09:43 PM EDT     Full Moon
Wed -- 09:48 PM EDT     2.20 knots Max Flood
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0-1.3-2.3-2.7-2.6-1.9-0.80.61.62.12.11.70.7-0.6-1.7-2.4-2.6-2.1-1.10.21.422.21.9

Weather Map and Satellite Images
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wmap_A
GOES 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.
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Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for Key West, FL (17,4,5,8)
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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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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.