Tuesday, November20, 2018 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 6:45AMSunset 5:40PM Tuesday November 20, 2018 8:12 AM EST (13:12 UTC) Moonrise 4:07PMMoonset 4:02AM Illumination 94% Phase: Waxing Gibbous; Moon at 12 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- 409 Am Est Tue Nov 20 2018
Today..Northeast to east winds 5 to 10 knots, becoming north to northeast. Seas 1 to 3 feet. Isolated showers.
Tonight..North to northeast winds near 10 knots. Seas 2 to 3 feet. Isolated showers.
Wednesday..Northeast winds 10 to 15 knots. Seas 2 to 4 feet. Isolated showers.
Wednesday night and Thursday..Northeast winds near 15 knots. Seas 3 to 5 feet. Scattered showers.
Thursday night..Northeast winds near 15 knots. Seas 3 to 5 feet. Scattered showers.
Friday..East winds 10 to 15 knots. Seas 2 to 4 feet. Isolated showers.
Friday night..East to southeast winds 10 to 15 knots becoming southeast to south. Seas 2 to 4 feet. Isolated showers.
Saturday and Saturday night..Southwest to west winds 10 to 15 knots. Seas 2 to 4 feet. 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 200834
afdkey
area forecast discussion
national weather service key west fl
334 am est Tue nov 20 2018

Discussion In the middle and upper levels( 700-200 mb), latest
available goes-r satellite imagery overlaid with model streamline
analysis as of 300 am, depicts a deep low amplitude middle and
upper trough situated across the central and eastern conus.

Upstream of that, the axis of a middle and upper ridge is
aligned along the spine of the rockies from british columbia
south to nevada. There is an approx nearly zonal 75 knots at 250
mb jet stream at the base of these features from northern old
mexico to across the gulf to across northern florida.

At the surface and in the lower to mid levels(surface to 700 mb),
latest available goes-r satellite imagery overlaid with marine
and land surface observations and surface analysis, as of 300 am,
detail 1040 mb arctic ridging from the dakotas to colorado.

Downstream of that, complex low pressure is in place over
michigan and the great lakes on either side. Southeast of that,
there is a dying frontal boundary situated across central florida
and a weak pressure pattern south of that. Consequently, last
evenings 00z sounding at key illustrated a gentle mostly east wind
from off the surface to about 800 mb, with a few decks of clouds
with bases found at around 950 and 800 mb respectively, with
columnar pwat at about 1.38 inches.

Currently As of 300 am, skies are mostly clear to partly
cloudy across the islands and surrounding waters. Radar and
satellite imagery do not detect any echoes attm. Temperatures
across the islands are in the middle to upper 70s, with dewpoints
in the lower to mid 70s. C-man stations along the reef and at
smith shoal light are northeast to east at 5 to 10 knots, and
island platforms are near 5 mph.

Short term Rest of today thru Friday, although a series of
deeper cold troughs will continue to move from east to west across
the midwestern, northeastern, middle atlantic, and southeastern
states, south florida and the keys will remain beneath generally
zonal flow with weak fast moving impulses in the flow zipping
across the area. At the surface and in the lower levels, a weak
pressure pattern today and tonight, will begin to be eroded
during Wednesday as a cold 1030 mb plus high over arkansas pulls
slowly eastward through Wednesday night. During thanksgiving day,
a near 1040 mb high over huron will build south southeastward
towards pennsylvania Thursday night, allowing for moderating
breezes across the keys by Wednesday night through Friday.

Slightly elevated low level convergence and isentropic lift will
be around the area during thanksgiving day and evening, so will
maintain a low chance for showers for those two periods, 30%.

Outside of that, just isolated chances for showers, 10% or 20%,
will continue given latest available, 00z forecast soundings
indications of between 1.25 and 1.50 inches pwat, with patchy
moisture confined to below 800 mb.

Long term Friday night thru Monday, the next cold front is
progged to move across the gulf Friday thru the weekend, with but
latest indications are for a series of surface low pressure system
to race from the plains to the northeast but fail to drag a front
thru the keys thru this time period. Local winds will gradually
veer thru the weekend and given continued lower level moisture,
will maintain isolated showers on account of pre-frontal confluent
flow, as significant front would approach the keys beyond Monday.

Marine The upcoming pattern will light to gentle breezes today
thru Wednesday, with moderating breezes for Wednesday night thru
Thursday night, before backing off a bit ahead of the next cold
front in the distant future. No scec or SCA headlines are
forecasted attm, however best chances for a headline would be for
the Wednesday night thru Thursday night timeframe if this should
come to fruition, as enough of an mslp gradient given the cold
highs passing well northwest to northeast of south florida and the
keys.

Through 21 06z,VFR conditions are expected to prevail at eyw and
mth. Light northeast or variable winds early this morning will
become east to southeast by mid-morning, then northerly just before
sunset. Visit aviationweather.Gov for additional flight weather
information.

Climate
On this day in 1959, the daily record rainfall of 7.71 inches was
recorded in key west.

Preliminary point temps pops
Key west 84 75 82 74 10 10 10 20
marathon 85 74 84 73 10 10 10 20

Key watches warnings advisories
Fl... None.

Gm... None.

Public marine fire... Futterman
aviation nowcasts... .Jr
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 mi42 min SSE 5.1 G 6 77°F 78°F1017.7 hPa
SMKF1 - Sombrero Key, FL 8 mi22 min NE 6 G 7 80°F 1017.2 hPa (+1.4)72°F
LONF1 - Long Key, FL 12 mi72 min N 4.1 G 5.1 76°F 77°F1017.3 hPa (+0.7)74°F
PKYF1 - Peterson Key, FL 20 mi72 min 77°F
LRKF1 - Little Rabbit Key, FL 20 mi132 min 76°F
MUKF1 - Murray Key, FL 26 mi72 min 76°F
WRBF1 - Whipray Basin, FL 28 mi72 min N 5.1 76°F
BOBF1 - Bob Allen, FL 28 mi72 min 77°F
BKYF1 29 mi72 min 77°F
GBTF1 - Garfield Bight, FL 33 mi72 min 77°F
TBYF1 34 mi72 min 77°F
WWEF1 35 mi132 min 77°F
LMDF1 - Little Madeira, FL 37 mi72 min 78°F
BNKF1 - Butternut Key, FL 37 mi72 min 76°F
LRIF1 39 mi72 min 77°F
TRRF1 - Taylor River, FL 39 mi72 min 78°F
CWAF1 39 mi132 min 77°F
MLRF1 - Molasses Reef, FL 40 mi72 min NE 1.9 G 1.9 79°F 81°F1017.8 hPa
NRRF1 42 mi72 min 77°F
DKKF1 - Duck Key, FL 42 mi132 min 76°F
TCVF1 - Trout Cove, FL 43 mi132 min 78°F
SREF1 43 mi72 min 77°F
KYWF1 - 8724580 - Key West, FL 43 mi42 min NE 4.1 G 6
BWSF1 - Blackwater Sound, FL 44 mi132 min 78°F
GBIF1 - Gunboat Island, FL 45 mi72 min 76°F
LBSF1 - Little Blackwater, FL 46 mi132 min 76°F
LSNF1 - Long Sound, FL 46 mi72 min 79°F
TPEF1 - Tarpon Bay East, FL 47 mi132 min 76°F
HCEF1 - Highway Creek, FL 48 mi132 min 80°F
CANF1 - Cane Patch, FL 48 mi72 min 75°F
THRF1 48 mi132 min 76°F
HREF1 48 mi72 min 76°F
SANF1 - Sand Key, FL 49 mi22 min 77°F 1017.8 hPa (+1.5)73°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 mi19 minNE 410.00 miFair76°F75°F97%1017.8 hPa

Wind History from MTH (wind in knots)
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Last 24hrE4E6SE6SE6SE7E6E5SE9E6SE5E4CalmCalmCalmCalmCalmNE3NE3CalmCalmCalmNE4NE3NE3
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2 days agoNE10NE12NE11NE10NE12NE11NE12NE13NE13
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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
Tue -- 12:44 AM EST     0.27 feet Low Tide
Tue -- 04:01 AM EST     Moonset
Tue -- 06:41 AM EST     1.58 feet High Tide
Tue -- 06:43 AM EST     Sunrise
Tue -- 12:35 PM EST     0.44 feet Low Tide
Tue -- 04:07 PM EST     Moonrise
Tue -- 05:35 PM EST     Sunset
Tue -- 06:30 PM EST     1.90 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.30.30.40.711.31.51.61.51.20.90.60.50.50.611.31.71.91.91.71.410.6

Tide / Current Tables for Moser Channel (swingbridge), Florida Current
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Moser Channel (swingbridge)
Click for Map
Tue -- 12:26 AM EST     -2.03 knots Max Ebb
Tue -- 03:43 AM EST     0.00 knots Slack
Tue -- 04:02 AM EST     Moonset
Tue -- 06:41 AM EST     1.67 knots Max Flood
Tue -- 06:44 AM EST     Sunrise
Tue -- 09:53 AM EST     -0.00 knots Slack
Tue -- 12:59 PM EST     -1.95 knots Max Ebb
Tue -- 04:07 PM EST     Moonrise
Tue -- 04:14 PM EST     0.00 knots Slack
Tue -- 05:36 PM EST     Sunset
Tue -- 06:48 PM EST     1.36 knots Max Flood
Tue -- 09:44 PM EST     -0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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-2-2-1.5-0.70.31.11.61.71.40.8-0.1-1.1-1.7-1.9-1.7-1.1-0.20.71.21.41.10.6-0.2-1.2

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 (8,2,3,4)
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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.