Wednesday, September20, 2017 L-36.com


Marine Weather and Tides
Key West, 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 7:14AMSunset 7:26PM Wednesday September 20, 2017 3:38 AM EDT (07:38 UTC) Moonrise 6:34AMMoonset 7:02PM Illumination 0% Phase: New Moon; Moon at 29 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- 948 Pm Edt Tue Sep 19 2017
Overnight..Northwest to north winds 5 to 10 knots becoming east late in the evening, then becoming south after midnight. Seas 1 to 2 feet.
Wednesday..Southwest to west winds near 5 knots early in the morning becoming variable less than 5 knots, then becoming northeast near 5 knots in the afternoon. Seas 1 to 3 feet.
Wednesday night..East winds 5 to 10 knots. Seas 1 to 3 feet. Isolated showers.
Thursday..Northeast winds 5 to 10 knots. Seas 1 to 3 feet. Isolated showers and Thunderstorms.
Thursday night..Northeast to east winds 10 to 15 knots. Seas 2 to 3 feet. Scattered showers and Thunderstorms.
Friday..Northeast winds 10 to 15 knots. Seas 2 to 3 feet. Scattered showers and Thunderstorms.
Friday night..Northeast to east winds 10 to 15 knots. Seas 2 to 4 feet. Scattered showers and Thunderstorms.
Saturday..Northeast winds 5 to 10 knots. Seas 2 to 3 feet. Scattered showers and Thunderstorms.
Saturday night..Northeast to east winds 10 to 15 knots. Seas 1 to 3 feet. Scattered showers and Thunderstorms.
Sunday..Northeast winds 5 to 10 knots. Seas 1 to 2 feet. Scattered showers and Thunderstorms.
Sunday night..East to southeast winds 5 to 10 knots. Seas 1 foot or less. Scattered showers and 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 191840
afdkey
area forecast discussion
national weather service key west fl
240 pm edt Tue sep 19 2017

Discussion Dry and warm weather will persist through Wednesday
night with slightly above normal temperatures. A return to more
seasonable weather will begin Thursday with shower and thunderstorm
chances increasing into the weekend. Winds will generally be
light from the north to northeast today, becoming light tonight.

Stronger northeast trade winds will return Wednesday night.

Currently Dry weather with scattered clouds and mostly light
winds will prevail through the day. Winds will increase later this
afternoon and most areas will see northwest to northeast winds.

Short term Today through Friday. A weak pressure pattern
combined with relatively dry air will make for continued quiet,
warm, and dry conditions across the keys. Currently precipitable
water over the area is 1.2 to 1.3 inches, which won't support much
in the way of convection, just shallow cumulus. Precipitable
water values will increase to around 1.5 inches Wednesday, but
this is still pretty dry. Increasing northeast trade winds will
return Wednesday night and continue into the weekend. However, it
takes a while for the moisture to re-enter the area, and
precipitable water values will remain around 1.5 inches Thursday
before increasing to around 2.0 inches Friday. Will keep it dry
through Wednesday, then slowly ramp up the pops to slight chance
from the south Wednesday night into Thursday, then bring it into
the chance range Thursday night.

With the dry conditions, temperatures will remain slightly above
seasonable values through Wednesday, 89-92, with lows 79-81,
before trending down to near normal values with a slightly lower
diurnal range Friday.

Long term Friday night through Monday. All eyes will be on
hurricane maria through the weekend, which at this time looks like
it will remain well east of the keys. Please refer to latest
national hurricane center products for more information. Increasing
easterlies will advect tropical moisture associated with the
hurricane into the area, and the chance for showers and
thunderstorms will increase Friday night into Saturday. Maria will
be closest to the area Sunday, but guidance shows negative omega
and a drying strengthening inversion, which suggests that the
keys will be within the subsidence region surrounding maria. Thus
the Sunday to Monday period looks to be drier again with slightly
warmer temperatures.

Marine A weak pressure gradient will keep winds light and
variable into Wednesday night. Increasing northeast trade winds
will return Wednesday night and continue into the weekend.

Winds will increase to 10-15 kts Friday, and possibly as high as
20 kts Saturday, highest in the far eastern straits of florida.

Hurricane maria is currently progged to pass east of the bahamas
over the weekend, and as she lifts NE away from the area winds
will turn to the NW and ease into early next week.

Wave heights of generally 1-2 ft are expected through Friday, except
across the straits of florida where a continued long-period swell
sneaking through the florida channel will drive 2-4 ft seas, highest
east. As winds increase into the weekend significant seas will
likely rise an additional 1 ft all waters except within florida bay
and waters north of the keys due to wave shadowing on the NE winds
off southern florida.

Aviation Vfr conditions will prevail at both keyw & kmth into
Wednesday. Surface winds will average from 290-310 degrees at
7-10 knots. There will be a few clouds with bases AOA fl025-030.

Key watches warnings advisories
Fl... None.

Gm... None.

Public marine fire... 99
aviation nowcasts... .99
data collection... ... 99
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Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
SANF1 - Sand Key, FL 15 mi48 min 82°F 1014.4 hPa (-0.8)73°F
KYWF1 - 8724580 - Key West, FL 17 mi50 min NNE 1 G 1 87°F1013.4 hPa
PLSF1 - Pulaski Shoal Light, FL 35 mi38 min Calm G 1 82°F 1014.1 hPa (-0.6)

Wind History for Key West, FL
(wind in knots)    EDIT      (on/off)   Help
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Key West International Airport, FL20 mi45 minN 010.00 miFair82°F77°F85%1013.7 hPa
Key West Naval Air Station, FL23 mi45 minN 010.00 miFair82°F78°F88%1013.5 hPa

Wind History from EYW (wind in knots)
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Last 24hrCalmCalmCalmCalmCalm3NW5NW7--NW3N5N7N8N5N7NE5N4N3CalmCalmCalmCalmCalmCalm
1 day agoE4E4NE4NE6NE7NE7NE6NE8N7N11N11
G15
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G17
N13NW11N9N10N11N7N8N6N8N6
2 days agoE5E5E3NE5NE4NE7NE4N9NE9N8N6N6N7N8N8NW8N8N10N8N6N9N7N5--

Tide / Current Tables for Sand Key Lighthouse, Sand Key Channel, Florida
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Sand Key Lighthouse
Click for Map
Wed -- 01:30 AM EDT     New Moon
Wed -- 03:21 AM EDT     0.27 feet Low Tide
Wed -- 07:15 AM EDT     Sunrise
Wed -- 07:33 AM EDT     Moonrise
Wed -- 09:55 AM EDT     2.01 feet High Tide
Wed -- 03:54 PM EDT     0.31 feet Low Tide
Wed -- 07:25 PM EDT     Sunset
Wed -- 08:01 PM EDT     Moonset
Wed -- 10:10 PM EDT     1.83 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
1.30.90.50.30.30.60.91.31.71.921.91.61.20.70.40.30.40.71.11.51.71.81.8

Tide / Current Tables for Boca Grande Channel, Florida Current
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Boca Grande Channel
Click for Map
Wed -- 01:30 AM EDT     New Moon
Wed -- 01:45 AM EDT     -1.59 knots Max Ebb
Wed -- 04:38 AM EDT     0.00 knots Slack
Wed -- 07:16 AM EDT     Sunrise
Wed -- 07:33 AM EDT     Moonrise
Wed -- 07:34 AM EDT     1.43 knots Max Flood
Wed -- 10:53 AM EDT     -0.00 knots Slack
Wed -- 02:06 PM EDT     -1.65 knots Max Ebb
Wed -- 05:04 PM EDT     0.00 knots Slack
Wed -- 07:26 PM EDT     Sunset
Wed -- 07:51 PM EDT     1.33 knots Max Flood
Wed -- 08:01 PM EDT     Moonset
Wed -- 11:09 PM EDT     -0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
-1-1.5-1.6-1.3-0.60.311.41.41.20.7-0.1-0.9-1.4-1.6-1.5-0.9-0.10.71.21.31.20.80.1

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 (3,6,7,8)
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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.