Friday, August23, 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 7:03AMSunset 7:55PM Friday August 23, 2019 2:36 AM EDT (06:36 UTC) Moonrise 12:00AMMoonset 12:50PM Illumination 48% Phase: Third Quarter Moon; Moon at 22 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 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 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- 1032 Pm Edt Thu Aug 22 2019
Overnight..Northeast to east winds 5 to 10 knots. Seas 1 to 2 feet. Scattered showers and isolated Thunderstorms.
Friday..Northeast to east winds 5 to 10 knots, becoming variable in the afternoon. Seas 1 to 2 feet. Scattered showers and Thunderstorms.
Friday night..Variable winds 5 to 10 knots, becoming southeast to south and increasing to near 10 knots. Seas 1 to 2 feet, building to around 2 feet. Scattered showers and Thunderstorms.
Saturday through Sunday..South to southwest winds near 10 knots. Seas 2 to 3 feet. Scattered showers and Thunderstorms.
Sunday night..South winds 5 to 10 knots. Seas 1 to 2 feet. Scattered showers and Thunderstorms.
Monday..South winds 5 to 10 knots. Seas 1 to 2 feet. Scattered showers and Thunderstorms.
Monday night..Southeast winds 5 to 10 knots. Seas 1 to 2 feet. Scattered showers and Thunderstorms.
Tuesday..South winds 5 to 10 knots. Seas 1 to 2 feet. Scattered showers and Thunderstorms.
Tuesday night..Variable winds near 5 knots. Seas around 1 foot. Scattered showers and 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 230236
afdkey
area forecast discussion
national weather service key west fl
1036 pm edt Thu aug 22 2019

Discussion
The low-level subtropical ridge centered just southeast of bermuda
reaches west across northern florida. Nestled along the southern
flank of the ridge, just out of reach of the 20 to 25 knots of wnw
shear, is a broad area of low pressure pressing west away from
andros. Radar loops reveal a distinct rotation between andros and
the upper keys. Convection near the center of circulation has been
lack-luster, although the latest scans reveal a meager flurry of
thunderstorms. The shear which awaits this system as it lumbers
northwest will limit its ability to organize through the short-
term. See the tropical section below for more details from the
nhc. Nevertheless, the cyclonic envelope will spread across the
island chain overnight, with the best chances for squalls and a
few thunderstorms across the upper keys. Winds at the reef tract
adjacent to the upper keys are higher than expected (10 to 15
knots) over the past few hours, so we have made adjustments
accordingly. No other changes are needed at this time.

Marine
No current watches, warnings, or advisories. The near-term
forecast (through the next 48 hours) will depend on the future
evolution of the disturbance near andros island. Winds will be
highly variable on Friday as the low pressure area slides
northwest through southern florida. From synopsis, a broad area
of low pressure just west of andros island will move slowly
northwestward tonight and cross the florida keys and south florida
Friday and Friday night. The trough is expected to lift northward
and away from our region Saturday and Saturday night. Thereafter,
a high pressure cell over cuba will gradually lift northward into
the straits of florida, then into south florida.

Aviation
Widely scattered showers are moving towards the south and
southwest in the vicinity of the island chain. As such, have mention
of vcsh for both the eyw and mth terminals for the overnight.VFR
conditions will be the prevailing conditions, though subVFR
conditions are possible due to passing showers an possible
thunderstorms. Convection aside, winds will be light and primarily
out of the northeast.

Tropical
Satellite and surface observations show that a broad area of
low pressure has formed just northwest of andros island in the
central bahamas. This system continues to produce a large area of
disorganized showers and thunderstorms that extend eastward over
the western atlantic for a few hundred miles. Environmental
conditions are forecast to be conducive for additional development
during the next several days, and a tropical depression could form
over the weekend or early next week while the system moves near the
coast of east-central florida and then offshore of the southeast
united states coast. Regardless of development, locally heavy rains
are possible over portions of the central and northwest bahamas, and
the east-central and southeast florida peninsula during the next few
days. Formation chance through 48 hours... Low... 30 percent. Formation
chance through 5 days... Medium... 50 percent.

Preliminary point temps pops
Key west 81 89 81 89 40 50 40 50
marathon 81 92 81 92 50 50 50 50

Key watches warnings advisories
Fl... None.

Gm... None.

Public marine fire... Clr
aviation nowcasts... .Liw
data collection... ... Dr
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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 mi48 min 1014.3 hPa
SMKF1 - Sombrero Key, FL 8 mi36 min NNE 8 G 9.9 83°F 1014.5 hPa (-1.0)77°F
LONF1 - Long Key, FL 12 mi36 min 83°F 1013.1 hPa (-1.2)78°F
PKYF1 - Peterson Key, FL 20 mi156 min 87°F
LRKF1 - Little Rabbit Key, FL 20 mi156 min 88°F
JKYF1 - Johnson Key, FL 23 mi156 min 87°F
MUKF1 - Murray Key, FL 26 mi156 min 85°F
BOBF1 - Bob Allen, FL 28 mi156 min 87°F
WRBF1 - Whipray Basin, FL 28 mi96 min NNW 8.9 87°F
BKYF1 29 mi156 min 85°F
GBTF1 - Garfield Bight, FL 33 mi156 min 87°F
TBYF1 34 mi96 min 85°F
WWEF1 35 mi156 min 86°F
LMDF1 - Little Madeira, FL 37 mi156 min 88°F
BNKF1 - Butternut Key, FL 37 mi156 min 87°F
LRIF1 39 mi156 min 88°F
TRRF1 - Taylor River, FL 39 mi96 min 85°F
CWAF1 39 mi156 min 86°F
DKKF1 - Duck Key, FL 42 mi156 min 86°F
NRRF1 42 mi156 min 85°F
TCVF1 - Trout Cove, FL 43 mi156 min 89°F
SREF1 43 mi156 min 87°F
KYWF1 - 8724580 - Key West, FL 43 mi54 min 81°F 90°F1014.6 hPa
JBYF1 43 mi156 min 85°F
BWSF1 - Blackwater Sound, FL 44 mi156 min 86°F
GBIF1 - Gunboat Island, FL 45 mi156 min 85°F
LBSF1 - Little Blackwater, FL 46 mi156 min 87°F
LSNF1 - Long Sound, FL 46 mi156 min 88°F
TPEF1 - Tarpon Bay East, FL 47 mi156 min 85°F
HCEF1 - Highway Creek, FL 48 mi156 min 88°F
HREF1 48 mi156 min 86°F
THRF1 48 mi156 min 87°F
CANF1 - Cane Patch, FL 48 mi156 min 85°F
SANF1 - Sand Key, FL 49 mi36 min ENE 5.1 G 7 84°F 1013.1 hPa (-1.5)77°F

Wind History for Vaca Key, FL
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure

Link to 5 minute data for KMTH

Wind History from MTH (wind in knots)
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Last 24hrNE6E7CalmCalm--Calm3N7NE8NE86N64NW8NE10NE7N7NE8NE4NE7N9NE6NE7N7
1 day agoSE7SE4SE5SE53E3E6E8SE5SE64SW7S6SE4SE655E6E6E7NE7E6E6E4
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Tide / Current Tables for Vaca Key-Fat Deer Key bridge, Florida
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Vaca Key-Fat Deer Key bridge
Click for Map
Fri -- 12:24 AM EDT     Moonrise
Fri -- 02:03 AM EDT     1.68 feet High Tide
Fri -- 07:01 AM EDT     Sunrise
Fri -- 09:33 AM EDT     0.34 feet Low Tide
Fri -- 10:58 AM EDT     Last Quarter
Fri -- 01:50 PM EDT     Moonset
Fri -- 03:22 PM EDT     1.15 feet High Tide
Fri -- 07:51 PM EDT     Sunset
Fri -- 08:41 PM EDT     0.58 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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1.41.61.71.61.51.210.70.50.40.40.50.70.91.11.11.110.90.70.60.60.70.9

Tide / Current Tables for Moser Channel (swingbridge), Florida Current
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Moser Channel (swingbridge)
Click for Map
Fri -- 12:04 AM EDT     0.00 knots Slack
Fri -- 12:25 AM EDT     Moonrise
Fri -- 02:20 AM EDT     0.82 knots Max Flood
Fri -- 04:59 AM EDT     -0.00 knots Slack
Fri -- 07:02 AM EDT     Sunrise
Fri -- 08:55 AM EDT     -1.60 knots Max Ebb
Fri -- 10:58 AM EDT     Last Quarter
Fri -- 12:35 PM EDT     0.00 knots Slack
Fri -- 01:51 PM EDT     Moonset
Fri -- 03:11 PM EDT     1.14 knots Max Flood
Fri -- 06:55 PM EDT     -0.00 knots Slack
Fri -- 07:52 PM EDT     Sunset
Fri -- 09:48 PM EDT     -1.11 knots Max Ebb
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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-00.50.80.70.4-0-0.5-1-1.4-1.6-1.4-1-0.40.30.91.110.80.4-0-0.6-1-1.1-0.9

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.
Link to Loop

Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for Key West, FL (2,6,7,8)
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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.