Thursday, July20, 2017 L-36.com


Marine Weather and Tides
Marathon, FL

Version 3.4
What's New / NOTES
6/25/2017 - NOAA is having a major issue that impact the 7 day forecast load times. Many users are reporting problems. The issue has been reported.
5/23/2017 - Worked with NOAA again to speed up the 7 day forecast load times. Thanks to them for being responsive.
5/19/2016 - There were issues with the 3 day airport observation history. I switched to another data source. Let me know if you see any issues with the data feeds.

Sunrise 6:49AMSunset 8:17PM Thursday July 20, 2017 6:33 PM EDT (22:33 UTC) Moonrise 2:55AMMoonset 4:36PM Illumination 8% 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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GMZ053 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- 420 Pm Edt Thu Jul 20 2017
Tonight..Variable winds 5 to 10 knots. Seas 1 to 2 feet. Isolated showers and Thunderstorms.
Friday..Southeast winds 5 to 10 knots. Seas 1 to 2 feet. Isolated showers and Thunderstorms.
Friday night..East to southeast winds increasing to 10 to 15 knots. Seas building to 2 to 3 feet. Isolated showers.
Saturday and Saturday night..East to southeast winds 10 to 15 knots. Seas 2 to 3 feet. Isolated showers.
Sunday..East winds near 10 knots. Seas 2 to 3 feet. Isolated showers and Thunderstorms.
Sunday night through Tuesday night..East to southeast winds 10 to 15 knots. Seas 2 to 4 feet. 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 201831
afdkey
area forecast discussion
national weather service key west fl
231 pm edt Thu jul 20 2017

Discussion
Showers and thunderstorms have remained isolated and widely
separated within the keys service area this afternoon. The
strongest activity is currently favoring the gulf waters adjacent
and slightly offshore from the lower keys. Under mostly sunny
skies elsewhere, temperatures are around 80 degrees with light and
variable winds in place.

Once again, no surprises were supplied by the GFS and most current
ecmwf graphical solutions. A complex upper pattern will see
several cyclonic gyres pivoting across the northern periphery of
the keys service area. A narrow, low-amplitude mid-level ridge
will hold sway over the immediate area, while expansive high
surface pressure remains aligned nearby over the next few periods.

The high pressure and ridge aloft will begin lifting northward by
late Friday and remain aligned across the mid portion of the state
through the weekend and into early next week. The chance of
measurable precipitation remains slight tonight through the
weekend with a deep and persistently light flow. Slightly deeper
moisture returns early next week as the flow becomes more deeply
aligned from the southeast. Little change in the steering flow and
available moisture is expected beyond that point through the
balance of the forecast. A low chance of measurable precipitation
will be maintained from Monday through Thursday. Expect daytime
high temperatures at or slightly above 90, and overnight lows at
or slightly above 80 through the entire forecast.

Marine
Aside from a few widely separated showers and thunderstorms,
expect relatively pleasant recreational boating conditions across
all coastal waters surrounding the florida keys over the next few
days. Light and variable winds are expected across most of the
waters for the next several periods, then align more from the
southeast this weekend and into early next week.

Aviation
A cloud line could bring brief episodes of showers thunderstorms and
sub-vfr conditions to eyw & mth until 21 00z. Otherwise, prevailing
vfr is expected until at least 20 18z. Winds will be variable, but
generally out of the south and east near 5 knots through Friday
afternoon.

Climate
On this date in keys weather history, in 1956, the temperature hit
94 degrees in key west. This set the daily high temperature
record for july 20th, a record that still stands 61 years later.

Temperature records for key west date back to 1872.

Preliminary point temps pops
Key west 82 91 83 91 10 10 10 10
marathon 82 93 83 91 10 10 10 10

Key watches warnings advisories
Fl... None.

Gm... None.

Public marine fire... 04
aviation nowcasts... .Mclovin
data collection... ... Chesser
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
VCAF1 - 8723970 - Vaca Key, FL 4 mi45 min NW 2.9 G 5.1 92°F 91°F1016.7 hPa
LONF1 - Long Key, FL 12 mi33 min NNW 1 G 1.9 89°F 92°F1017 hPa (-1.4)75°F
PKYF1 - Peterson Key, FL 20 mi93 min 92°F
LRKF1 - Little Rabbit Key, FL 20 mi153 min 93°F
JKYF1 - Johnson Key, FL 23 mi153 min 92°F
MUKF1 - Murray Key, FL 26 mi93 min 94°F
WRBF1 - Whipray Basin, FL 28 mi153 min SW 4.1 93°F
BOBF1 - Bob Allen, FL 28 mi93 min 93°F
BKYF1 29 mi93 min 96°F
GBTF1 - Garfield Bight, FL 33 mi93 min 95°F
TBYF1 34 mi93 min 94°F
WWEF1 35 mi153 min 88°F
LMDF1 - Little Madeira, FL 37 mi93 min 93°F
BNKF1 - Butternut Key, FL 37 mi93 min 92°F
TRRF1 - Taylor River, FL 39 mi93 min 92°F
LRIF1 39 mi93 min 90°F
CWAF1 39 mi153 min 89°F
MLRF1 - Molasses Reef, FL 40 mi33 min N 1.9 G 2.9 86°F 87°F1017.5 hPa (-1.2)
NRRF1 42 mi93 min 89°F
DKKF1 - Duck Key, FL 42 mi153 min 91°F
SREF1 43 mi93 min 89°F
TCVF1 - Trout Cove, FL 43 mi153 min 93°F
KYWF1 - 8724580 - Key West, FL 43 mi45 min WNW 2.9 G 5.1 91°F 90°F1016.9 hPa
BWSF1 - Blackwater Sound, FL 44 mi153 min 93°F
GBIF1 - Gunboat Island, FL 45 mi93 min 88°F
LBSF1 - Little Blackwater, FL 46 mi153 min 93°F
LSNF1 - Long Sound, FL 46 mi93 min 92°F
TPEF1 - Tarpon Bay East, FL 47 mi153 min 87°F
CANF1 - Cane Patch, FL 48 mi153 min 84°F
HREF1 48 mi93 min 86°F
HCEF1 - Highway Creek, FL 48 mi153 min 93°F
SANF1 - Sand Key, FL 49 mi43 min N 1.9 G 2.9 85°F 1017.8 hPa (-1.6)73°F

Wind History for Vaca Key, FL
(wind in knots)    EDIT      (on/off)   Help
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
The Florida Keys - Marathon International Airport, FL1 mi40 minN 310.00 miMostly Cloudy88°F77°F70%1017 hPa

Wind History from MTH (wind in knots)
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Last 24hrCalmN4E4NE10E5E5E4E5SE5SE6SE7S64S5Calm44SE4S5W5CalmCalmCalmN3
1 day agoCalmNE3CalmE5E3SE3E4CalmE5SE5E6SE5SE4SE5354SE654S343S3
2 days ago46S5SW5S5S43S4S3S4Calm--3CalmSE4S4S34S444SE333

Tide / Current Tables for Vaca Key-Fat Deer Key bridge, Florida
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Vaca Key-Fat Deer Key bridge
Click for Map
Thu -- 03:54 AM EDT     Moonrise
Thu -- 06:17 AM EDT     1.99 feet High Tide
Thu -- 06:46 AM EDT     Sunrise
Thu -- 01:47 PM EDT     -0.16 feet Low Tide
Thu -- 05:36 PM EDT     Moonset
Thu -- 08:03 PM EDT     1.09 feet High Tide
Thu -- 08:13 PM EDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.30.50.81.21.61.8221.81.410.50.1-0.1-0.2-00.20.50.811.110.80.6

Tide / Current Tables for Moser Channel (swingbridge), Florida Current
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Moser Channel (swingbridge)
Click for Map
Thu -- 01:10 AM EDT     -1.71 knots Max Ebb
Thu -- 03:55 AM EDT     Moonrise
Thu -- 04:17 AM EDT     0.00 knots Slack
Thu -- 06:47 AM EDT     Sunrise
Thu -- 06:51 AM EDT     1.20 knots Max Flood
Thu -- 09:40 AM EDT     -0.00 knots Slack
Thu -- 01:13 PM EDT     -2.46 knots Max Ebb
Thu -- 04:39 PM EDT     0.00 knots Slack
Thu -- 05:36 PM EDT     Moonset
Thu -- 07:53 PM EDT     2.05 knots Max Flood
Thu -- 08:14 PM EDT     Sunset
Thu -- 11:08 PM EDT     -0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
-1.4-1.7-1.6-1.1-0.30.61.11.210.5-0.3-1.3-2.1-2.4-2.3-1.8-0.80.41.41.921.81.20.1

Weather Map and Satellite Images
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Weather Map
wmap_A
IR Satellite Image from GEOS
east_satellite

GOES Local Image of Southeast    EDIT
Geos

Wind Forecast for Key West, FL (18,4,5,8)
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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.