Saturday, December16, 2017 L-36.com


Marine Weather and Tides
Duck Key, 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 7:03AMSunset 5:43PM Saturday December 16, 2017 1:51 PM EST (18:51 UTC) Moonrise 5:29AMMoonset 4:44PM Illumination 3% Phase: Waning Crescent; Moon at 28 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 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- 1012 Am Est Sat Dec 16 2017
.small craft should exercise caution for increasing winds...
.a small craft advisory will likely be required tonight...
This afternoon..Northeast to east winds 15 knots, increasing to 15 to 20 knots. Seas 1 to 3 feet, building to 2 to 4 feet. NEarshore waters a moderate chop, becoming choppy.
Tonight..Northeast to east winds 15 to 20 knots, increasing to near 20 knots. Seas 2 to 4 feet, building to 3 to 4 feet. NEarshore waters choppy, becoming rough.
Sunday..East winds 15 to 20 knots. Seas 2 to 4 feet. NEarshore waters choppy.
Sunday night..Northeast to east winds near 15 knots. Seas 2 to 3 feet. NEarshore waters a moderate chop.
Monday..East winds 10 to 15 knots. Seas 2 to 3 feet. NEarshore waters a light to moderate chop. Isolated showers.
Monday night..Northeast to east winds 10 to 15 knots. Seas 2 to 3 feet. NEarshore waters a light to moderate chop. Isolated showers.
Tuesday..East winds 10 to 15 knots. Seas 1 to 3 feet. NEarshore waters a light to moderate chop. Isolated showers.
Tuesday night..East winds near 10 knots. Seas 1 to 2 feet. NEarshore waters a light chop. Isolated showers.
Wednesday..East to southeast winds near 10 knots. Seas 1 to 3 feet. NEarshore waters a light chop. Isolated showers.
Wednesday night..East to southeast winds near 10 knots. Seas 1 to 2 feet. NEarshore waters a light chop. Isolated showers.

7 Day Forecast for Marine Location Near Duck Key, FL
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location: 24.79, -80.88     debug


Area Discussion for - Key West, FL
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Fxus62 kkey 161344
afdkey
area forecast discussion
national weather service key west fl
844 am est Sat dec 16 2017

Discussion In the middle and upper levels(700-200 mb), latest
satellite imagery overlaid with model streamline analysis as of
800 am depict a deepening middle and upper longwave trough now
over the western CONUS with an embedded sharpening positively
tilted trough axis oriented from southern alberta to just offshore
of southern california and a developing upper cyclone over
northern mexico and west texas. Downstream of that, middle and
upper height rises are evident over the SE united states as a deep
and warm anticyclone centered just SE of jamaica builds
northwards.

At the surface and in the lower to middle levels,(surface-700 mb),
latest satellite imagery overlaid with surface land and marine
observations and analysis as of 800 am detail a 992 mb surface low
in the NW atlantic near 42n 60w trailing a cold front southwest to
across central florida and into the gulf where it slows down. Back
behind that feature, a 1025 mb plus surface ridge located over
central al ms la is building southeastwards. As such, the 12z
sounding at key west illustrated a gentle to moderate northeast to
east flow off the surface to about 900 mb, only slowly moistening
lower to mid troposphere, with westerlies above that and total
columnar pwat still at .94 inches.

Currently As of 800 am, skies are partly sunny across the
islands and surrounding waters, with temperatures slowly rising
into the upper 60s, with dewpoints now mostly above 60 degrees.

Radar detects some non-meteorological echoes attm. C-man stations
along the florida reef are recording northeast winds between 10
and 15 knots with some locations near 15 knots, with island
platforms generally northeast between 10 and 15 mph.

Short term This afternoon and tonight, expect the surface
boundary now hung up over central florida to gradually wash out as
stronger ridging to the northwest intensifies a bit and builds
eastwards to between the carolina piedmont and central al. The
result is development of moderate northeast to east breezes by
this afternoon continuing thru to sunset. Then the ridging
intensifies a few millibars tonight near the carolina coast,
resulting in a continued freshening of northeast to east or east
breezes, with near breezy to breezy conditions over the islands
returning and breezy to windy conditions on all waters. Low
temperatures tonight will only fall to near 70 as dewpoints also
approach that value, bringing back the tropical feel.

Marine Breezes will increase through the afternoon, and will
likely put up a cautionary headline late this morning for the
florida straits for increasing breezes reaching to between 15 and
20 knots during the afternoon. Then, small craft advisory
conditions look likely across the florida straits tonight, with
scec conditions likely and SCA conditions very possible across
hawk channel, the offshore gulf waters 20 to 60 nm west of
mainland monroe county, and the waters in the extreme SE gulf
around the rebecca shoal and dry tortugas channels.

Aviation Rest of today and this evening,VFR conditions will
prevail at eyw and mth through at least the next 24 hours.

Sustained north to northeast winds near 10 knots from just off the
surface to about 3,000 feet will veer to more of an easterly
direction and increase to 15 to 20 knots this afternoon.

Key watches warnings advisories
Fl... None.

Gm... None.

Public marine... Futterman
aviation nowcasts... .Futterman
upper air data collection... ... Rizzo
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
PKYF1 - Peterson Key, FL 11 mi111 min 66°F
VCAF1 - 8723970 - Vaca Key, FL 13 mi51 min ENE 6 G 8.9 70°F 68°F1020.6 hPa (-2.0)
LRKF1 - Little Rabbit Key, FL 14 mi171 min 66°F
JKYF1 - Johnson Key, FL 18 mi171 min 66°F
BOBF1 - Bob Allen, FL 19 mi111 min 67°F
WRBF1 - Whipray Basin, FL 21 mi171 min N 1 66°F
BKYF1 23 mi111 min 69°F
GBTF1 - Garfield Bight, FL 26 mi111 min 70°F
TBYF1 27 mi111 min 69°F
BNKF1 - Butternut Key, FL 28 mi111 min 65°F
LMDF1 - Little Madeira, FL 30 mi111 min 68°F
WWEF1 31 mi171 min 65°F
MLRF1 - Molasses Reef, FL 31 mi51 min NE 13 G 14 73°F 77°F1021.2 hPa (-1.9)
TRRF1 - Taylor River, FL 32 mi111 min 67°F
LRIF1 34 mi111 min 66°F
DKKF1 - Duck Key, FL 34 mi171 min 65°F
TCVF1 - Trout Cove, FL 35 mi171 min 66°F
BWSF1 - Blackwater Sound, FL 36 mi171 min 67°F
CWAF1 36 mi171 min 65°F
NRRF1 38 mi111 min 64°F
LBSF1 - Little Blackwater, FL 38 mi171 min 67°F
LSNF1 - Long Sound, FL 38 mi111 min 69°F
HCEF1 - Highway Creek, FL 40 mi171 min 66°F
GBIF1 - Gunboat Island, FL 41 mi111 min 63°F
SREF1 41 mi111 min 66°F
TPEF1 - Tarpon Bay East, FL 43 mi171 min 61°F
CANF1 - Cane Patch, FL 44 mi171 min 64°F
HREF1 45 mi111 min 64°F
BDVF1 - Broad River, FL 48 mi111 min 62°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, FL10 mi58 minNE 910.00 miFair76°F62°F62%1020.9 hPa

Wind History from MTH (wind in knots)
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Last 24hrN3N4N4NW4N4N3N3N4N4N5NE6N5N6N7NE5NE7NE5NE6NE7NE9NE10NE11NE11NE9
1 day agoN54CalmSE4CalmCalmCalmCalmN3NW3CalmN3CalmCalmCalmN3N4CalmCalmNE4N3NE3NE4N3
2 days agoN10N9N7NW7NW5NW5NW4N4N4N5CalmCalmCalmCalmCalmCalmNE3NE3CalmE5NE7NE9NE8NE7

Tide / Current Tables for Conch Key, eastern end, Florida
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Conch Key
Click for Map
Sat -- 01:46 AM EST     -0.03 feet Low Tide
Sat -- 05:28 AM EST     Moonrise
Sat -- 07:01 AM EST     Sunrise
Sat -- 08:05 AM EST     1.09 feet High Tide
Sat -- 01:09 PM EST     0.29 feet Low Tide
Sat -- 04:44 PM EST     Moonset
Sat -- 05:37 PM EST     Sunset
Sat -- 07:18 PM EST     1.64 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.20-00.10.30.60.811.110.90.60.40.30.40.60.91.21.51.61.61.41.20.8

Tide / Current Tables for Long Key Viaduct, Florida Current
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Long Key Viaduct
Click for Map
Sat -- 01:33 AM EST     -1.40 knots Max Ebb
Sat -- 04:45 AM EST     0.00 knots Slack
Sat -- 05:28 AM EST     Moonrise
Sat -- 07:01 AM EST     Sunrise
Sat -- 08:00 AM EST     1.08 knots Max Flood
Sat -- 11:04 AM EST     -0.00 knots Slack
Sat -- 02:13 PM EST     -1.16 knots Max Ebb
Sat -- 04:44 PM EST     Moonset
Sat -- 05:15 PM EST     0.00 knots Slack
Sat -- 05:37 PM EST     Sunset
Sat -- 07:46 PM EST     0.68 knots Max Flood
Sat -- 10:31 PM EST     -0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
-1.1-1.4-1.4-1.1-0.50.20.711.110.60-0.5-1-1.2-1.1-0.7-0.10.40.60.70.60.3-0.3

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 (13,3,4,5)
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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.