Wednesday, May22, 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 6:39AMSunset 8:08PM Wednesday May 22, 2019 9:19 PM EDT (01:19 UTC) Moonrise 10:44PMMoonset 8:48AM Illumination 84% Phase: Waning Gibbous; Moon at 19 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:201905230230;;291700 Fzus52 Kkey 222021 Cwfkey Coastal Waters Forecast For The Florida Keys National Weather Service Key West Fl 421 Pm Edt Wed May 22 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>044-230230- 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- 421 Pm Edt Wed May 22 2019
.small craft advisory in effect...
Tonight..East winds near 15 knots, increasing to near 20 knots. Seas 2 to 3 feet, building to 3 to 4 feet. NEarshore waters a moderate chop, becoming rough. Isolated showers.
Thursday..Northeast to east winds 15 to 20 knots. Seas 2 to 4 feet. NEarshore waters choppy. Isolated showers.
Thursday night..Northeast to east winds near 20 knots. Seas 3 to 4 feet. NEarshore waters rough. Isolated showers.
Friday..Northeast to east winds 15 to 20 knots. Seas 2 to 4 feet. NEarshore waters choppy.
Friday night..Northeast to east winds near 20 knots. Seas 3 to 4 feet. NEarshore waters rough.
Saturday..Northeast to east winds 15 to 20 knots. Seas 2 to 4 feet. NEarshore waters choppy.
Saturday night..East winds near 20 knots. Seas 3 to 4 feet. NEarshore waters rough. Isolated showers.
Sunday..East winds 15 to 20 knots. Seas 2 to 4 feet. NEarshore waters choppy.
Sunday night..East winds 15 to 20 knots. Seas 2 to 4 feet. NEarshore waters choppy. Isolated showers.
Monday..East winds near 15 knots. Seas 2 to 3 feet. NEarshore waters a moderate chop.
Monday night..East to southeast winds 10 to 15 knots. Seas 1 to 3 feet. NEarshore waters a light to moderate chop. 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 221916
afdkey
area forecast discussion
national weather service key west fl
316 pm edt Wed may 22 2019

Discussion
Mean layer analyses place an upper level ridge axis northeast
across the gulf of mexico, supporting a surface anticyclone
centered near the delmarva. Water vapor imagery highlights a broad
expanse of subsidence across the gulf of mexico and the yucatan.

Moderate easterly breezes prevail across the island chain and
marine observation points, a few knots higher than this morning.

Temperatures are in the upper 80s with dewpoints in the lower 70s.

Forecast
The story of the week will be the fresh easterly breezes, slight
rain chances, and seasonal temperatures, with highs reaching the
upper 80s, and near 80 overnight. The sensible weather elements
will be ruled by the developing ridge complex over the
southeastern united states. Record mid-level heights will support
a well formed low- level subtropical anticyclone over the western
north atlantic. Low level moisture will be squeezed into a thin
layer below 850 mb, beneath significant inhibition and a deep
layer of dry, subsiding air. Low level moisture will reach
equilibrium within the boisterous bl flow and the moisture flux
off the atlantic. Parcels just to the north of us will be modified
continental, with dewpoints in the upper 60s. Our dewpoints will
remain right near 70, so no real reprieve from the humidity. By
the end of the forecast, the blocking ridge will slide slightly
east and south, allowing breezes to diminish, low level moisture
to increase and the static stability to decrease. Nevertheless, we
have retained the slight rain chances through the forecast
period.

Marine
A large high pressure cell will move slowly southward over the
western north atlantic tonight and Friday, then settle across
north and central florida this weekend. Freshening easterly
breezes are expected across all coastal waters of the florida keys
tonight and Thursday, with fresh to strong breezes then
continuing through Sunday night. Small craft advisory conditions
are expected, however, the advisory is only in effect for hawk
channel and the straits of florida. Breezes will diminish early
next week.

Aviation
Vfr conditions are anticipated at the key west and marathon
terminals this afternoon. East to southeast winds near 10 knots with
occasional gusts of 15 to 20 knots will strengthen further this
evening to 10 to 15 knots with gusts near 20 knots.

Preliminary point temps pops
Key west 79 87 79 87 20 10 20 10
marathon 82 91 81 90 20 10 20 10

Key watches warnings advisories
Fl... None.

Gm... Small craft advisory for gmz042>044- 052>055-072>075.

Public marine fire... Clr
aviation nowcasts... .11
data collection... ... Bt
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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 mi32 min 82°F 87°F1017.6 hPa
SMKF1 - Sombrero Key, FL 8 mi30 min 81°F 1016.8 hPa (+1.1)69°F
KYWF1 - 8724580 - Key West, FL 43 mi32 min 82°F 87°F1017.4 hPa
SANF1 - Sand Key, FL 49 mi30 min 81°F 1016.9 hPa (+1.1)67°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 mi27 minENE 1310.00 miA Few Clouds84°F68°F59%1017.5 hPa

Wind History from MTH (wind in knots)
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2 days agoE7E5E6E5E5E3E4CalmCalmCalmNE4NE5N7N7NE7E76S8SE76E8SE4E5E3

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 -- 12:18 AM EDT     1.04 feet High Tide
Wed -- 05:20 AM EDT     0.36 feet Low Tide
Wed -- 06:37 AM EDT     Sunrise
Wed -- 09:48 AM EDT     Moonset
Wed -- 11:15 AM EDT     1.82 feet High Tide
Wed -- 07:00 PM EDT     -0.13 feet Low Tide
Wed -- 08:04 PM EDT     Sunset
Wed -- 11:44 PM EDT     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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110.90.70.50.40.40.611.41.71.81.81.61.30.90.50.2-0.1-0.1-00.20.50.7

Tide / Current Tables for Moser Channel (swingbridge), Florida Current
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Moser Channel (swingbridge)
Click for Map
Wed -- 03:16 AM EDT     -0.00 knots Slack
Wed -- 06:09 AM EDT     -1.56 knots Max Ebb
Wed -- 06:38 AM EDT     Sunrise
Wed -- 09:27 AM EDT     0.00 knots Slack
Wed -- 09:49 AM EDT     Moonset
Wed -- 11:41 AM EDT     0.98 knots Max Flood
Wed -- 02:34 PM EDT     -0.00 knots Slack
Wed -- 06:06 PM EDT     -1.94 knots Max Ebb
Wed -- 08:04 PM EDT     Sunset
Wed -- 09:38 PM EDT     0.00 knots Slack
Wed -- 11:44 PM EDT     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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1.71.510.2-0.6-1.3-1.6-1.4-1-0.30.40.910.70.3-0.3-1-1.7-1.9-1.8-1.3-0.60.31.1

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.
Link to Loop

Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for Key West, FL (21,6,7,8)
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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.