Tuesday, March19, 2019 L-36.com


Marine Weather and Tides
Key West, 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 7:30AMSunset 7:38PM Tuesday March 19, 2019 7:44 PM EDT (23:44 UTC) Moonrise 5:25PMMoonset 5:40AM Illumination 99% Phase: Waxing Gibbous; Moon at 14 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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GMZ044 Expires:201903200230;;617865 Fzus52 Kkey 192023 Cwfkey Coastal Waters Forecast For The Florida Keys National Weather Service Key West Fl 423 Pm Edt Tue Mar 19 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>044-200230- 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- 423 Pm Edt Tue Mar 19 2019
.small craft advisory in effect...
Tonight..Northeast to east winds 20 to 25 knots, decreasing to 15 to 20 knots. Seas 2 to 4 feet. West of cosgrove shoal light, seas 5 to 6 feet, subsiding to 3 to 5 feet after midnight. NEarshore waters very rough, becoming choppy. Showers and isolated Thunderstorms.
Wednesday..North to northeast winds 15 to 20 knots, decreasing to 10 to 15 knots. Seas 1 to 3 feet. NEarshore waters choppy, becoming a light to moderate chop.
Wednesday night..North winds 10 to 15 knots. Seas 1 to 2 feet. NEarshore waters a light to moderate chop. Isolated showers.
Thursday..Northwest to north winds increasing to near 15 knots. Seas 1 to 3 feet. NEarshore waters becoming a moderate chop. Isolated showers.
Thursday night..North winds 15 to 20 knots. Seas 1 to 3 feet. NEarshore waters choppy.
Friday..North winds 15 to 20 knots, decreasing to near 10 knots. Seas 1 to 3 feet. NEarshore waters choppy, becoming a light to moderate chop.
Friday night..Northeast winds 10 to 15 knots. Seas 1 to 2 feet. NEarshore waters a light to moderate chop.
Saturday..Northeast to east winds 10 to 15 knots. Seas 1 to 2 feet. NEarshore waters a light to moderate chop. Isolated showers.
Saturday night..East winds 10 to 15 knots. Seas 1 to 3 feet. NEarshore waters a light to moderate chop. Isolated showers.
Sunday and Sunday night..East winds near 15 knots. Seas 2 to 3 feet. NEarshore waters a moderate chop. Scattered showers.


7 Day Forecast for Marine Location Near Key West, FL
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location: 24.55, -82.13     debug


Area Discussion for - Key West, FL
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Fxus62 kkey 191857
afdkey
area forecast discussion
national weather service key west fl
257 pm edt Tue mar 19 2019

Discussion
Currently - broad high pressure system over the eastern united
states along with lower pressure over cuba and the adjacent
florida straits is producing fresh to strong northeast breezes
across the florida keys. A slow moving surface frontal boundary
has pushed into the distant straits off of the upper keys and
associated convective activity has diminished, although there are
still showers and a few thunderstorms along the boundary. The
large area of rain has diminished in area and is now working its
way eastward out of the middle keys. Today's rain coverage was
aided by a mid to upper level trough swinging through south
florida and the keys. While that is now pushing out, deep layered
troughing persists and another impulse in the central gulf of
mexico can be seeing approaching our area.

Forecast - while for the time being, the rain is tapering off, a
wet pattern remains in place. This is due to the previously
mentioned deep layered troughing persisting over our area and the
incoming mid level impulse. Thunderstorm activity is expected to
be isolated at best, but expect shields of light to moderate rain
to fill in again later this evening. Fresh to strong northeast
breezes this evening will taper back tonight as the high to our
north slips out to the east and the areas of low pressure to our
south shift off southeast and eastward. This flow will keep cool
conditions across the keys, so expect overnight lows in the mid
60s.

The trough will shift eastward Tuesday into Thursday with sharp
ridging building over the plains. Expect drier air to move into
our area as a series of high cells push southeastward through
middle corridor of the country. Expect winds to slacken and back
northerly through this period. With that said, a wind surge off
the florida gulf coast is expected Thursday afternoon and evening,
and a nocturnal surge is possible beginning late Thursday night.

This will keep temperatures trending below normal with lows in the
mid 60s and highs in the mid 70s. Rain chances will taper off to
slim to none.

Marine
High pressure over the eastern united states and a complicated
stretch of lower pressure near cuba will result in fresh to north
northeast breezes this evening. These systems will gradually shift
eastward over the next couple of days. As a result, winds will
relax significantly from late tonight through the next couple of
days. High pressure building down the plains into the gulf of
mexico beginning mid week, backing winds north. Light north
breezes will freshen Thursday afternoon and a nocturnal surge is
expected late Thursday night.

Aviation
This evening and overnight, prevailing MVFR CIGS and vis will
continue overnight thru at least 12z with broken nimbostratus
stratus CIGS with bases AOA fl010-015 accompanied by areas of light
to occasionally moderate rain. Surface visibility should average 7
miles or greater but may come down to MVFR or 3 miles in moderate
rain. Surface cross winds averaging 15 to 18 knots with gusts
between 23 and 28 knots will continue this evening, diminishing to
12 with gusts near 20 knots after 24z, then to around 10 knots or
less after 9 or 10z.

Preliminary point temps pops
Key west 69 77 69 79 90 20 10 -
marathon 69 79 69 80 90 20 10 -

Key watches warnings advisories
Fl... None.

Gm... Small craft advisory gmz031>035-042>044-052>055-072>075.

Public marine fire... 11
aviation nowcasts... .Futterman
data collection... ...

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Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
42095 13 mi134 min 78°F3 ft
SANF1 - Sand Key, FL 15 mi54 min 72°F 1014.7 hPa (-0.0)63°F
KYWF1 - 8724580 - Key West, FL 17 mi50 min NE 7 G 11 72°F 79°F1014.9 hPa
PLSF1 - Pulaski Shoal Light, FL 35 mi44 min ENE 20 G 22 72°F 1015.5 hPa (+0.4)
GKYF1 40 mi104 min 73°F

Wind History for Key West, FL
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Key West International Airport, FL20 mi51 minENE 11 G 1810.00 miOvercast72°F66°F82%1014.9 hPa
Key West Naval Air Station, FL23 mi51 minENE 910.00 miOvercast73°F64°F74%1014.7 hPa

Wind History from EYW (wind in knots)
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1 day agoN6CalmNW3N5N8N9N9N6N7N5NE4NE6NE4E6E5N5NE7NE7NE8NE9N13N8N9NE10
2 days agoSE3SE3E3E3CalmE3E3E3CalmN3N3N3CalmE5E44SE55NE5N8N75N6N6

Tide / Current Tables for Sand Key Lighthouse, Sand Key Channel, Florida (2)
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Sand Key Lighthouse
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Tue -- 02:36 AM EDT     -0.29 feet Low Tide
Tue -- 06:37 AM EDT     Moonset
Tue -- 07:32 AM EDT     Sunrise
Tue -- 08:52 AM EDT     1.17 feet High Tide
Tue -- 02:23 PM EDT     -0.05 feet Low Tide
Tue -- 06:24 PM EDT     Moonrise
Tue -- 07:38 PM EDT     Sunset
Tue -- 08:48 PM EDT     1.73 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.4-0-0.3-0.3-0.10.20.50.91.11.21.10.80.40.1-0-00.30.611.41.71.71.61.3

Tide / Current Tables for Boca Grande Channel, Florida Current
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Boca Grande Channel
Click for Map
Tue -- 12:34 AM EDT     -1.80 knots Max Ebb
Tue -- 03:36 AM EDT     0.00 knots Slack
Tue -- 06:38 AM EDT     1.58 knots Max Flood
Tue -- 06:38 AM EDT     Moonset
Tue -- 07:33 AM EDT     Sunrise
Tue -- 09:58 AM EDT     -0.00 knots Slack
Tue -- 01:04 PM EDT     -1.65 knots Max Ebb
Tue -- 03:56 PM EDT     0.00 knots Slack
Tue -- 06:24 PM EDT     Moonrise
Tue -- 06:50 PM EDT     1.51 knots Max Flood
Tue -- 07:38 PM EDT     Sunset
Tue -- 10:04 PM EDT     -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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-1.7-1.8-1.4-0.60.41.11.51.61.30.8-0-0.8-1.4-1.6-1.5-0.80.10.91.41.51.30.80.1-0.8

Weather Map and Satellite Images
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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.
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Wind Forecast for Key West, FL (19,4,5,8)
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Ground Weather Radar Station Key West, FL
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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.