Monday, December10, 2018 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 6:59AMSunset 5:40PM Monday December 10, 2018 7:40 AM EST (12:40 UTC) Moonrise 9:42AMMoonset 8:43PM Illumination 9% Phase: Waxing Crescent; Moon at 3 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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GMZ075 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 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- 430 Am Est Mon Dec 10 2018
.small craft should exercise caution...
Today..Northwest to north winds 15 to 20 knots. Seas 4 to 6 feet. Isolated showers.
Tonight..Northwest to north winds 15 to 20 knots. Seas 4 to 6 feet.
Tuesday..North winds 15 to 20 knots. Seas 4 to 7 feet.
Tuesday night..Northeast winds 15 to 20 knots. Seas 4 to 6 feet.
Wednesday..Northeast to east winds near 15 knots. Seas 3 to 5 feet. Isolated showers.
Wednesday night..East to southeast winds near 15 knots. Seas 3 to 5 feet. Isolated showers.
Thursday..Southeast winds 10 to 15 knots. Seas 3 to 5 feet. Isolated showers.
Thursday night..Southeast winds near 15 knots. Seas 3 to 5 feet. Scattered showers.
Friday..South to southwest winds near 15 knots. Seas 3 to 5 feet. Scattered showers and isolated Thunderstorms.
Friday night..West to northwest winds 15 to 20 knots. Seas 2 to 4 feet, building to 4 to 7 feet. Scattered showers and isolated Thunderstorms.


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 100935
afdkey
area forecast discussion
national weather service key west fl
435 am est Mon dec 10 2018

Discussion
Currently - a fairly complicated long wave trough is aligned over
the united states, with a lob amplified over the eastern united
states. As a result a low pressure system is moving slowly
northeastward along the mid atlantic coast. An associated cold
front extends southwestward across the central gulf of mexico. The
prefrontal trough is working its way across the florida keys, and
winds are increasing moderately, ranging out of the west to
northwest. All shower activity is now located across the florida
straits, with a few strands of sprinkles found elsewhere.

Forecast - high pressure will consolidate over texas today, then
shift eastwards along the gulf coast states over the next couple
of days. The best cold air advection will hold off until tonight.

As a result, temperatures today will linger in the mid 70s only
slowly falling late in the afternoon. Expect temperatures to
then fall to a few degrees below normal tonight. Winds will
gradually clock northeast then east northeast by Wednesday.

Expect temperatures to begin gradually warming and moistening.

Rain chances will be near zero through this period.

The previously mentioned high pressure system will arc northeast
then east into the atlantic through the second half of the week.

Meanwhile, another surface low will develop over the central
united states. Local winds will continue to veer around to
southeast then south by this Friday, raising temps and moisture
above normal. Expect rain chances to edge upwards as a prefrontal
trough moves into the area. The next cold front appears to make it
through the keys around the Friday night time frame, however
uncertain remains high.

Marine
The leading edge of a broad cold front is moving through the
florida keys this morning. Winds are picking up moderately across
keys waters. Cautions are in effect for most keys waters. High
pressure will gradually shift eastward over the gulf coast states.

As a result, winds will remain roughly in this range and
gradually clock north then northeast over the next couple of days.

Expect peaks and lulls due to both diurnal heating effects over
south florida, and undulations in the pressure pattern waving
through. The high will then swing northeast then east into the
atlantic through the second half of the weak, gentle to moderate
east breezes will shift southeast then south. Another cold front
is expected to reach keys waters in the Friday night time frame.

However, uncertainty is high.

Aviation
Vfr conditions will generally prevail today at the eyw and mth
terminals, but tempo MVFR ceilings around 2000 feet will be possible
during the predawn and early morning hours, in the wake of a cold
front currently moving through the keys. Expect stratocu ceilings
around 5000 feet to prevail throughout much of the day. NW winds of
10 to 14 knots may gust around 20 knots at times from mid morning
through the afternoon and into the evening hours.

Key watches warnings advisories
Fl... None.

Gm... None.

Public marine fire... 11
aviation nowcasts... .Jacobson
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
SANF1 - Sand Key, FL 15 mi50 min 74°F 1016.8 hPa (+1.0)66°F
KYWF1 - 8724580 - Key West, FL 17 mi40 min NW 13 G 16 74°F 76°F1017 hPa
PLSF1 - Pulaski Shoal Light, FL 35 mi40 min NNW 20 G 22 73°F 1017.2 hPa (+1.6)
GKYF1 40 mi100 min 74°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 mi47 minNNW 910.00 miOvercast75°F68°F79%1016.9 hPa
Key West Naval Air Station, FL23 mi47 minNW 1410.00 miOvercast74°F66°F79%1016.6 hPa

Wind History from EYW (wind in knots)
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G18
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1 day agoNE6NE5NE6E9NE5NE6E8E9E11E10E10E9E10E10E8E5E7SE9SE7SE8SE11SE9SE8S11
2 days agoNE6NE10
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NE6NE6NE7NE7NE7NE6NE5E5NE6NE6NE6NE6

Tide / Current Tables for Sand Key Lighthouse, Sand Key Channel, Florida
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Sand Key Lighthouse
Click for Map
Mon -- 04:55 AM EST     -0.08 feet Low Tide
Mon -- 07:00 AM EST     Sunrise
Mon -- 09:40 AM EST     Moonrise
Mon -- 11:10 AM EST     1.13 feet High Tide
Mon -- 04:07 PM EST     0.56 feet Low Tide
Mon -- 05:40 PM EST     Sunset
Mon -- 08:42 PM EST     Moonset
Mon -- 10:26 PM EST     1.81 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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1.51.10.60.3-0-0.100.30.60.811.11.110.80.60.60.60.81.11.41.61.81.8

Tide / Current Tables for Boca Grande Channel, Florida Current
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Boca Grande Channel
Click for Map
Mon -- 02:16 AM EST     -1.35 knots Max Ebb
Mon -- 05:29 AM EST     0.00 knots Slack
Mon -- 07:01 AM EST     Sunrise
Mon -- 08:12 AM EST     1.29 knots Max Flood
Mon -- 09:41 AM EST     Moonrise
Mon -- 12:04 PM EST     -0.00 knots Slack
Mon -- 03:01 PM EST     -1.01 knots Max Ebb
Mon -- 05:40 PM EST     Sunset
Mon -- 05:59 PM EST     0.00 knots Slack
Mon -- 08:17 PM EST     0.86 knots Max Flood
Mon -- 08:43 PM EST     Moonset
Mon -- 11:20 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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-0.7-1.1-1.3-1.3-0.9-0.40.411.31.20.90.50-0.5-0.9-1-0.9-0.500.60.80.80.50.1

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.
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Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for Key West, FL (7,2,3,4)
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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.