Tuesday, November21, 2017 L-36.com


Marine Weather and Tides
Big Coppitt 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 6:46AMSunset 5:39PM Tuesday November 21, 2017 5:18 AM EST (10:18 UTC) Moonrise 9:17AMMoonset 8:20PM Illumination 8% 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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GMZ044 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- 433 Am Est Tue Nov 21 2017
Today..East to southeast winds 10 to 15 knots, decreasing to near 10 knots. Seas 1 to 3 feet, subsiding to 1 to 2 feet. NEarshore waters a light to moderate chop, becoming a light chop. Isolated showers.
Tonight..Northeast to east winds 5 to 10 knots. Seas 1 to 2 feet. NEarshore waters smooth to a light chop. Isolated showers.
Wednesday..Northeast winds 5 to 10 knots. Seas 1 foot or less. NEarshore waters smooth to a light chop. Isolated showers.
Wednesday night..East winds 5 to 10 knots. Seas 1 foot or less. NEarshore waters smooth to a light chop. Scattered showers.
Thursday..Southeast to south winds near 10 knots. Seas 1 to 2 feet. NEarshore waters a light chop. Scattered showers and isolated Thunderstorms.
Thursday night..South winds near 10 knots. Seas 1 to 2 feet. NEarshore waters a light chop. Scattered showers and isolated Thunderstorms.
Friday..Southwest to west winds 10 to 15 knots. Seas 1 to 3 feet. NEarshore waters a light to moderate chop. Scattered showers and isolated Thunderstorms.
Friday night..West to northwest winds 10 to 15 knots. Seas 1 to 3 feet. NEarshore waters a light to moderate chop. Isolated showers.
Saturday and Saturday night..Northwest to north winds 10 to 15 knots. Seas 1 to 3 feet. NEarshore waters a light to moderate chop. Isolated showers.

7 Day Forecast for Marine Location Near Big Coppitt Key, FL
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location: 24.55, -81.53     debug


Area Discussion for - Key West, FL
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Fxus62 kkey 210949
afdkey
area forecast discussion
national weather service key west fl
449 am est Tue nov 21 2017

Discussion
The mean layer ridge formerly situated over the baja peninsula
has been nudged westward by a height carving complex of pacific
short waves. The base of the mid-upper level trough reaches into
the bay of campeche and has recently aided in the vigor of
convection across the gulf of mexico. The cold front which
stalled over the florida keys yesterday has fractured and
rebounded to the north. One piece pivoted around the western flank
of the ridge and now dangles over the eastern gulf of mexico. The
other piece remains aligned from east to west and was the
focusing mechanism for thunderstorms over southern florida a few
hours ago. Satellite derived moisture products and nighttime
microphysics imagery highlight a swath of drier air (pw ~0.90")
just to the south of the florida keys. East to southeast winds
average 12 to 14 knots at the available marine stations.

Temperatures are near 70 across the island chain with dewpoints
just a few ticks below. Skies are mostly clear and the kbyx radar
detects isolated showers moving northwest into the extreme
southeastern gulf of mexico.

Forecast
The meat of the mid-upper level trough will pivot to the
northeast today, crossing into the atlantic bight tonight. At the
same time, the low level gradient will erode over the gulf of
mexico and the florida peninsula. By Wednesday, weak and deep
cyclonic flow will develop over the gulf of mexico. Forecast
soundings indicate dry air will be the limiting factor Wednesday
and Wednesday night, with most of the convectively favored
ingredients remaining to our northwest. The limited ingredients
will change Thursday and Thursday night, as a fresh infusion of
pacific short wave (currently diving southeast through the
rockies) rounds the base of the long wave trough, drawing a rich
ribbon of theta-e out of the western caribbean. Through the
entire forecast period, the best surface based forcing will
coincide with the short wave's energetic boost. Shallow, fast
moving showers will persist Friday and Friday night, before drier,
cooler weather arrives Saturday through Monday. Summing up, the
best rain chances (50%) will be Thursday through Friday, and with
some fine tuning, chances may need to be tweaked upwards. Light to
gentle breezes today through Wednesday night, followed by
freshening southerly breezes Thursday, which will steadily box
around to the northwest by Saturday.

Marine
No current watches, warnings, or headlines. From synopsis, moderate
easterly breezes will steadily diminish across the coastal waters
of the florida keys today. A broad area of low pressure likely
will develop over the gulf of mexico Wednesday and Wednesday
night, then slowly move northeast across the florida peninsula
Thursday through Friday. The exact track of this non- tropical low
remains uncertain. As such, the direction and magnitude of the
winds will depend on the future evolution of this system.

Thereafter, high pressure will build into the mississippi river
valley Saturday and Saturday night, turning breezes to the
northwest to north across the coastal waters of the florida keys.

Aviation
Vfr conditions will prevail at both the key west and marathon
terminals through Tuesday afternoon. Surface winds will be mainly
from the east near 5 knots.

Preliminary point temps pops
Key west 81 73 80 72 20 20 20 30
marathon 82 73 81 73 20 20 20 30

Key watches warnings advisories
Fl... None.

Gm... None.

Public marine fire... Clr
aviation nowcasts... .Devanas
data collection... ... Chesser
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
KYWF1 - 8724580 - Key West, FL 15 mi49 min NE 4.1 G 6 73°F 77°F1013.1 hPa
SANF1 - Sand Key, FL 20 mi29 min 74°F 1014.1 hPa (-1.2)69°F
VCAF1 - 8723970 - Vaca Key, FL 25 mi49 min ESE 2.9 G 5.1 75°F 76°F1013.1 hPa
LRKF1 - Little Rabbit Key, FL 48 mi139 min 74°F
JKYF1 - Johnson Key, FL 48 mi139 min 74°F
PKYF1 - Peterson Key, FL 49 mi79 min 75°F

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, FL12 mi26 minENE 410.00 miFair0°F0°F%1014 hPa

Wind History from NQX (wind in knots)
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Last 24hrCalmCalmCalmNE3E4NE7NE5NE11
G19
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1 day agoN4N3N4N5N4N3N5N5N8N4NW5N5N5N7NW5NW4NW5NW6NW7NW7NW7N7N5N4
2 days ago----------NE5NE5NE9NE11NE12NE11NE11NE9E7E8E7E5E5CalmNE4NE4NE3N4N4

Tide / Current Tables for Key Lois, southeast end, Florida
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Key Lois
Click for Map
Tue -- 04:32 AM EST     0.07 feet Low Tide
Tue -- 06:46 AM EST     Sunrise
Tue -- 09:15 AM EST     Moonrise
Tue -- 10:37 AM EST     1.49 feet High Tide
Tue -- 03:50 PM EST     0.56 feet Low Tide
Tue -- 05:37 PM EST     Sunset
Tue -- 08:20 PM EST     Moonset
Tue -- 09:48 PM EST     2.14 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
1.61.10.70.30.10.10.30.611.31.51.51.31.10.80.60.60.711.41.82.12.12

Tide / Current Tables for Bahía Honda Harbor (Bridge) Florida Current
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Bahía Honda Harbor (Bridge) Florida Current
Click for Map
Tue -- 03:12 AM EST     -2.37 knots Max Ebb
Tue -- 06:44 AM EST     0.00 knots Slack
Tue -- 06:45 AM EST     Sunrise
Tue -- 09:15 AM EST     Moonrise
Tue -- 09:17 AM EST     1.72 knots Max Flood
Tue -- 12:44 PM EST     -0.00 knots Slack
Tue -- 03:52 PM EST     -1.87 knots Max Ebb
Tue -- 05:36 PM EST     Sunset
Tue -- 07:19 PM EST     0.00 knots Slack
Tue -- 08:19 PM EST     Moonset
Tue -- 09:22 PM EST     1.05 knots Max Flood
Tue -- 11:56 PM EST     -0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
-0.4-1.2-2-2.4-2.2-1.7-0.80.31.21.71.61.20.6-0.2-1.1-1.7-1.9-1.6-1.1-0.30.5110.5

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 (5,6,7,8)
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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.