Saturday, August24, 2019 L-36.com


Marine Weather and Tides
Marathon, FL

Version 3.4
NOTICE
7/25/2019 New feature in the Airports section gives a link to 5 minute updates for data reports.
6/2/2019. Many thanks to a user for reporting an error on one of the Edit pages. The switch to PHP 7.2 caused many pages that previously worked to quit working. I fixed many but I still depend on users to report ones I missed. Please report errors HERE or send an email to me at L-36.com. Allen

Sunrise 7:04AMSunset 7:54PM Saturday August 24, 2019 1:42 AM EDT (05:42 UTC) Moonrise 12:07AMMoonset 1:48PM Illumination 38% Phase: Third Quarter Moon; Moon at 23 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:201908240830;;112727 Fzus52 Kkey 240221 Cwfkey Coastal Waters Forecast For The Florida Keys National Weather Service Key West Fl 1021 Pm Edt Fri Aug 23 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>044-240830- 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- 1021 Pm Edt Fri Aug 23 2019
Overnight..Variable winds 5 to 10 knots, becoming south to southwest near 10 knots. Seas 1 to 2 feet. NEarshore waters smooth to a light chop, becoming a light chop. Scattered showers and isolated Thunderstorms.
Saturday..Southwest winds 5 to 10 knots. Seas around 1 foot. NEarshore waters smooth to a light chop. Scattered showers and isolated Thunderstorms.
Saturday night..South to southwest winds 5 to 10 knots. Seas around 1 foot. NEarshore waters smooth to a light chop. Scattered showers and isolated Thunderstorms.
Sunday..Southwest winds 5 to 10 knots. Seas around 1 foot. NEarshore waters smooth to a light chop. Scattered showers and isolated Thunderstorms.
Sunday night..South winds 5 to 10 knots. Seas around 1 foot. NEarshore waters smooth to a light chop. Scattered showers and isolated Thunderstorms.
Monday..South to southwest winds 5 to 10 knots. Seas around 1 foot. NEarshore waters smooth to a light chop. Scattered showers and isolated Thunderstorms.
Monday night..Southeast to south winds 5 to 10 knots. Seas around 1 foot. NEarshore waters smooth to a light chop. Scattered showers and isolated Thunderstorms.
Tuesday..Variable winds near 5 knots. Seas 1 foot or less. NEarshore waters smooth. Scattered showers and isolated Thunderstorms.
Tuesday night..Variable winds near 5 knots. Seas 1 foot or less. NEarshore waters smooth. Scattered showers and isolated Thunderstorms.
Wednesday..Variable winds near 5 knots. Seas 1 foot or less. NEarshore waters smooth. Scattered showers and isolated Thunderstorms.
Wednesday night..Northwest winds near 5 knots. Seas near 1. NEarshore waters smooth. Scattered showers and isolated Thunderstorms.


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 240242
afdkey
area forecast discussion
national weather service key west fl
1042 pm edt Fri aug 23 2019

Discussion
A broad area of low pressure has moved west over southeast
florida with a rotation still noted near miami. Radar imagery from
both the miami and key west radars show that most of the
convection from earlier in the day has dissipated with the
exception along and just offshore of miami proper. Surface
observations show that the trough axis lies over florida bay and
the middle keys. Middle keys upper keys and surrounding waters,
the winds have become southwest, while the lower keys and
surrounding waters winds remain from the northwest to north. This
area of low pressure will continue to slowly trek northwestward
for the overnight and winds will eventually shift to the southwest
across the entire island chain. Best chances for precipitation
will remain in the upper keys and surrounding coastal waters. Only
minor changes were made to the wording in the coastal forecast
for the overnight period, otherwise forecast remains on track.

Marine
A disorganized low pressure system will continue to track
northwestward across south florida through the overnight and into
Saturday. This feature will then lift out northeastward late in
the weekend into early next week. As a result, winds will start
out light and wrapping cyclonically around the low then become a
more uniform light to gentle south to southwesterly through the
weekend. Thereafter, ridging will lift northward towards the keys,
behind the departing low, but then break down. This will leave
light and variable winds across the area.

Aviation
Vfr will prevail at the eyw and mth terminals overnight as a broad
and disorganized low pressure system lumbers northwest from near
south florida. Variable low-level steering will become confluent and
southwesterly Saturday. Given the lower pressure, ample moisture,
and vertical profile favorable for congestus along the island chain,
there are good chances for afternoon thunderstorm impacts at both
terminals. For now we have only included vicinity mentions, although
periods of MVFR CIGS ifr vis will be possible with convective wind
gusts near 25 knots.

Tropical
A broad area of low pressure located near the coast of southeastern
florida continues to produce a large area of showers and
thunderstorms that extend eastward over the northern bahamas and the
adjacent western atlantic waters. The system has changed little in
organization since this afternoon, but environmental conditions are
expected to be conducive for gradual development, and a tropical
depression is likely to form over the weekend. The low is forecast
to move generally northwestward near or over southeastern florida
through tonight, and then move northward to northeastward over the
atlantic near the east coast of central florida on Saturday. After
that, the system is expected to move northeastward offshore of the
southeastern united states coast. Regardless of development, locally
heavy rains are possible over the northwestern bahamas and the
southern and central florida peninsula through the weekend.

Interests in the northwestern bahamas, the florida peninsula, and
the southeast coast of the united states should monitor the progress
of this system. An air force reserve hurricane hunter aircraft is
scheduled to investigate the system on Saturday, if necessary.

Formation chance through 48 hours... High... 70 percent. Formation
chance through 5 days... High... 90 percent.

Satellite imagery suggests that the circulation associated with an
area of low pressure located about 1100 miles east-southeast of
the windward islands has become better defined, but the thunderstorm
activity is limited at this time. Environmental conditions appear
conducive for additional development, and a tropical depression is
likely to form over the weekend or early next week while it moves
generally westward to west-northwestward near 15 mph. Formation
chance through 48 hours... Medium... 60 percent. Formation chance
through 5 days... High... 70 percent.

Key watches warnings advisories
Fl... None.

Gm... None.

Public marine fire... Liw
aviation nowcasts... .Clr
data collection... ... Sd
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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 mi55 min 84°F 90°F1013.4 hPa
SMKF1 - Sombrero Key, FL 8 mi43 min SW 4.1 G 6 85°F 1013.7 hPa (+0.0)78°F
LONF1 - Long Key, FL 12 mi43 min 85°F 1012.6 hPa (+0.0)78°F
PKYF1 - Peterson Key, FL 20 mi103 min 89°F
LRKF1 - Little Rabbit Key, FL 20 mi163 min 89°F
JKYF1 - Johnson Key, FL 23 mi103 min 88°F
MUKF1 - Murray Key, FL 26 mi103 min 87°F
BOBF1 - Bob Allen, FL 28 mi103 min 87°F
WRBF1 - Whipray Basin, FL 28 mi103 min NE 1.9 89°F
BKYF1 29 mi103 min 87°F
GBTF1 - Garfield Bight, FL 33 mi103 min 86°F
TBYF1 34 mi103 min 87°F
WWEF1 35 mi163 min 86°F
LMDF1 - Little Madeira, FL 37 mi103 min 87°F
BNKF1 - Butternut Key, FL 37 mi103 min 86°F
LRIF1 39 mi103 min 87°F
TRRF1 - Taylor River, FL 39 mi103 min 85°F
CWAF1 39 mi163 min 87°F
DKKF1 - Duck Key, FL 42 mi163 min 85°F
NRRF1 42 mi103 min 85°F
TCVF1 - Trout Cove, FL 43 mi163 min 89°F
SREF1 43 mi103 min 88°F
KYWF1 - 8724580 - Key West, FL 43 mi61 min 83°F 90°F1013.8 hPa
JBYF1 43 mi103 min 86°F
BWSF1 - Blackwater Sound, FL 44 mi163 min 87°F
GBIF1 - Gunboat Island, FL 45 mi103 min 86°F
LBSF1 - Little Blackwater, FL 46 mi163 min 85°F
LSNF1 - Long Sound, FL 46 mi103 min 86°F
TPEF1 - Tarpon Bay East, FL 47 mi163 min 86°F
HCEF1 - Highway Creek, FL 48 mi103 min 87°F
HREF1 48 mi103 min 85°F
THRF1 48 mi163 min 85°F
CANF1 - Cane Patch, FL 48 mi103 min 84°F
SANF1 - Sand Key, FL 49 mi43 min W 5.1 G 6 85°F 1012.7 hPa (+0.0)79°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 mi3.8 hrsW 410.00 miFair85°F75°F75%1012.9 hPa

Link to 5 minute data for KMTH

Wind History from MTH (wind in knots)
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Last 24hr------------N5--N6N6--N6--N6N6N6--W6NW7NW7--E3NW3W4
1 day ago----E6------------Calm3N7----6N64NW8NE10NE7----NE4--
2 days ago--SE10------------3E3----SE5SE64SW7S6--SE655E6E6E7

Tide / Current Tables for Vaca Key-Fat Deer Key bridge, Florida
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Vaca Key-Fat Deer Key bridge
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Sat -- 01:06 AM EDT     Moonrise
Sat -- 02:56 AM EDT     1.74 feet High Tide
Sat -- 07:02 AM EDT     Sunrise
Sat -- 10:51 AM EDT     0.29 feet Low Tide
Sat -- 02:48 PM EDT     Moonset
Sat -- 04:58 PM EDT     1.09 feet High Tide
Sat -- 07:50 PM EDT     Sunset
Sat -- 09:41 PM EDT     0.62 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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1.21.51.71.71.71.51.310.70.50.30.30.40.60.70.911.110.90.80.70.60.7

Tide / Current Tables for Moser Channel (swingbridge), Florida Current
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Moser Channel (swingbridge)
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Sat -- 01:07 AM EDT     Moonrise
Sat -- 01:14 AM EDT     0.00 knots Slack
Sat -- 03:21 AM EDT     0.70 knots Max Flood
Sat -- 06:02 AM EDT     -0.00 knots Slack
Sat -- 07:02 AM EDT     Sunrise
Sat -- 10:01 AM EDT     -1.63 knots Max Ebb
Sat -- 01:43 PM EDT     0.00 knots Slack
Sat -- 02:49 PM EDT     Moonset
Sat -- 04:27 PM EDT     1.19 knots Max Flood
Sat -- 07:51 PM EDT     Sunset
Sat -- 08:13 PM EDT     -0.00 knots Slack
Sat -- 11:05 PM EDT     -1.13 knots Max Ebb
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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-0.6-0.10.40.70.60.40-0.4-1-1.4-1.6-1.5-1.1-0.50.20.81.21.210.70.1-0.5-1-1.1

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 (1,6,7,8)
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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.