Thursday, July18, 2019 L-36.com


Marine Weather and Tides
Marathon, FL

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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 6:47AMSunset 8:19PM Thursday July 18, 2019 11:30 PM EDT (03:30 UTC) Moonrise 8:46PMMoonset 7:10AM Illumination 96% Phase: Waning Gibbous; Moon at 17 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:201907190830;;280568 Fzus52 Kkey 190226 Cwfkey Coastal Waters Forecast For The Florida Keys National Weather Service Key West Fl 1026 Pm Edt Thu Jul 18 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>075-190830- 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- 1026 Pm Edt Thu Jul 18 2019
Overnight..East to southeast winds 10 to 15 knots. Seas 2 to 4 feet. Isolated showers and Thunderstorms.
Friday..East winds 10 to 15 knots. Seas 2 to 3 feet. Isolated showers and Thunderstorms.
Friday night..East to southeast winds 10 to 15 knots. Seas 2 to 4 feet. Isolated showers and Thunderstorms.
Saturday..East winds 10 to 15 knots. Seas 2 to 3 feet. Isolated showers and Thunderstorms.
Saturday night..East to southeast winds 10 to 15 knots. Seas 2 to 4 feet. Scattered showers and isolated Thunderstorms.
Sunday..East winds 10 to 15 knots. Seas 2 to 3 feet. Scattered showers and isolated Thunderstorms.
Sunday night..East to southeast winds 10 to 15 knots. Seas 2 to 3 feet. Isolated showers and Thunderstorms.
Monday..East winds near 10 knots. Seas 1 to 3 feet. Isolated showers and Thunderstorms.
Monday night..East winds near 10 knots. Seas 1 to 3 feet. Isolated showers and Thunderstorms.
Tuesday..East winds 5 to 10 knots. Seas 1 to 2 feet. Isolated showers and Thunderstorms.
Tuesday night..Southeast winds 5 to 10 knots. Seas 1 to 2 feet. Isolated 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 190222
afdkey
area forecast discussion
national weather service key west fl
1022 pm edt Thu jul 18 2019

Discussion
Water vapor imagery reveals a chaotic maelstrom across the
western north atlantic and the southeastern united states. Nldn
lightning data highlights the release of daytime heating
throughout the same region, with thunderstorms flourishing along
diurnal boundaries. The one exception is across the western north
atlantic where a tutt-like cell and its steepened mid-upper level
lapse rates have tapped into the lower level maritime cumulus.

Mean low-level ridging continues to stretch west across northern
florida, and yet it has weakened in the last 12 hours, with
falling heights (see regional 00z raobs) between 925-700 mb. The
200 mb raobs (mfl, key, and mynn) did not register the western
periphery of the previously analyzed tutt-like feature. This may
be due to contamination from convective anvils, because satellite
derived vorticity products from cimms seem to think its there.

Nevertheless, this feature may come into play Friday through
Sunday as it lumbers westward.

Forecast
We tweaked the wind forecast to account for a subtle nocturnal
east-southeasterly surge which is now impinging along the reef
tract, with winds on the low end of 10 to 15 knots. We have held
at slight rain chances overnight due to inhibition and dry air
sampled at 880 mb by the kkey raob. The forecast is on track and
needs no further adjustments.

Marine
High pressure will extend from the atlantic westward across the
florida peninsula tonight through Sunday. This will result in
gentle to moderate, east to southeast breezes. Breezes will
diminish Monday through Tuesday night as high pressure settles
southward towards the florida keys. We have winds trending to 5 to
10 knots Tuesday and Tuesday night across the straits of florida,
where in fact the eastern straits southeast of the upper keys will
be closer to near 10 knots, and the western straits closer to near
5 knots.

Aviation
Vfr conditions will prevail for the overnight period. Showers thus
far has stayed over the gulfside waters and are moving west.

Remnant boundaries from earlier convection off of southern mainland
florida reside over the extreme southeast gulf waters while
boundaries from andros island are moving westward in the flow.

Together these boundaries could initiate further convection and
could possible move over the terminals. Exact timing and placement
is too low at this time to include in the forecast.

Preliminary point temps pops
Key west 83 91 83 91 20 20 30 30
marathon 83 93 83 93 20 20 20 30

Key watches warnings advisories
Fl... None.

Gm... None.

Public marine fire... Clr
aviation nowcasts... .Liw
data collection... ... Sd
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 mi48 min 85°F 89°F1018.1 hPa
SMKF1 - Sombrero Key, FL 8 mi20 min E 12 G 14 84°F 1018.5 hPa78°F
LONF1 - Long Key, FL 12 mi20 min 85°F 1017.6 hPa77°F
PKYF1 - Peterson Key, FL 20 mi90 min 88°F
LRKF1 - Little Rabbit Key, FL 20 mi150 min 88°F
JKYF1 - Johnson Key, FL 23 mi90 min 88°F
MUKF1 - Murray Key, FL 26 mi90 min 86°F
BOBF1 - Bob Allen, FL 28 mi90 min 89°F
WRBF1 - Whipray Basin, FL 28 mi90 min NE 7 89°F
BKYF1 29 mi90 min 90°F
GBTF1 - Garfield Bight, FL 33 mi90 min 90°F
TBYF1 34 mi90 min 91°F
WWEF1 35 mi150 min 89°F
LMDF1 - Little Madeira, FL 37 mi90 min 91°F
BNKF1 - Butternut Key, FL 37 mi90 min 89°F
LRIF1 39 mi90 min 89°F
TRRF1 - Taylor River, FL 39 mi90 min 91°F
CWAF1 39 mi150 min 88°F
DKKF1 - Duck Key, FL 42 mi150 min 89°F
NRRF1 42 mi90 min 89°F
TCVF1 - Trout Cove, FL 43 mi150 min 96°F
SREF1 43 mi90 min 87°F
KYWF1 - 8724580 - Key West, FL 43 mi48 min 85°F 89°F1017.9 hPa
JBYF1 43 mi90 min 91°F
BWSF1 - Blackwater Sound, FL 44 mi150 min 90°F
GBIF1 - Gunboat Island, FL 45 mi90 min 85°F
LBSF1 - Little Blackwater, FL 46 mi150 min 89°F
LSNF1 - Long Sound, FL 46 mi90 min 92°F
TPEF1 - Tarpon Bay East, FL 47 mi150 min 87°F
HCEF1 - Highway Creek, FL 48 mi90 min 91°F
HREF1 48 mi90 min 85°F
THRF1 48 mi150 min 90°F
CANF1 - Cane Patch, FL 48 mi90 min 86°F
SANF1 - Sand Key, FL 49 mi20 min E 12 G 16 85°F 1016.9 hPa78°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 mi37 minE 510.00 miFair85°F73°F70%1018 hPa

Wind History from MTH (wind in knots)
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Last 24hrE6E7E6E6E4E66SE9
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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
Thu -- 04:00 AM EDT     0.33 feet Low Tide
Thu -- 06:45 AM EDT     Sunrise
Thu -- 08:09 AM EDT     Moonset
Thu -- 10:04 AM EDT     1.91 feet High Tide
Thu -- 05:29 PM EDT     -0.07 feet Low Tide
Thu -- 08:14 PM EDT     Sunset
Thu -- 09:46 PM EDT     Moonrise
Thu -- 11:22 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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10.80.60.40.30.40.71.11.51.81.91.81.61.30.80.40.1-0-00.10.40.711.1

Tide / Current Tables for Moser Channel (swingbridge), Florida Current
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Moser Channel (swingbridge)
Click for Map
Thu -- 01:50 AM EDT     -0.00 knots Slack
Thu -- 04:47 AM EDT     -1.68 knots Max Ebb
Thu -- 06:46 AM EDT     Sunrise
Thu -- 07:57 AM EDT     0.00 knots Slack
Thu -- 08:10 AM EDT     Moonset
Thu -- 10:24 AM EDT     1.15 knots Max Flood
Thu -- 01:19 PM EDT     -0.00 knots Slack
Thu -- 04:43 PM EDT     -2.13 knots Max Ebb
Thu -- 08:10 PM EDT     0.00 knots Slack
Thu -- 08:15 PM EDT     Sunset
Thu -- 09:46 PM EDT     Moonrise
Thu -- 11:00 PM EDT     1.63 knots Max Flood
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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1.40.8-0.2-1-1.6-1.7-1.4-0.800.81.11.10.80.2-0.6-1.4-2-2.1-1.8-1.1-0.20.81.41.6

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 (23,6,7,8)
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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.