Thursday, October19, 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 7:26AMSunset 6:57PM Thursday October 19, 2017 11:28 PM EDT (03:28 UTC) Moonrise 6:12AMMoonset 6:12PM 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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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- 1031 Pm Edt Thu Oct 19 2017
.small craft should exercise caution for increasing winds...
Overnight..Northeast to east winds near 15 knots, increasing to 15 to 20 knots late. Seas 1 to 3 feet building to 2 to 3 feet. NEarshore waters a moderate chop becoming choppy. Scattered showers and isolated Thunderstorms.
Friday and Friday night..Northeast to east winds near 20 knots. Seas 2 to 4 feet. NEarshore waters rough. Scattered showers.
Saturday..East winds near 20 knots. Seas 2 to 4 feet. NEarshore waters rough. Scattered showers and isolated Thunderstorms.
Saturday night..East to southeast winds near 20 knots. Seas 3 to 5 feet. NEarshore waters rough. Scattered showers and isolated Thunderstorms.
Sunday..East to southeast winds 15 to 20 knots. Seas 2 to 5 feet. NEarshore waters choppy. Scattered showers and isolated Thunderstorms.
Sunday night..East to southeast winds 15 to 20 knots. Seas 2 to 4 feet. NEarshore waters choppy. Scattered showers and isolated Thunderstorms.
Monday..East to southeast winds near 15 knots. Seas 2 to 4 feet. NEarshore waters a moderate chop. Scattered showers and isolated Thunderstorms.
Monday night..Southeast to south winds 10 to 15 knots. Seas 1 to 3 feet. NEarshore waters a light to moderate chop. Scattered showers and isolated Thunderstorms.
Tuesday..Southwest winds 10 to 15 knots. Seas 1 to 3 feet. NEarshore waters a light to moderate chop. Scattered showers and isolated Thunderstorms.
Tuesday night..West to northwest winds near 10 knots. Seas 1 to 3 feet. NEarshore waters smooth to a light chop. Scattered showers and isolated Thunderstorms.

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 200233
afdkey
area forecast discussion
national weather service key west fl
1033 pm edt Thu oct 19 2017

Discussion
Thunderstorms bubbling off the tip of south florida were able to
pour over into our coastal waters earlier this afternoon and
evening, creating higher shower coverage than previously expected
for the gulfside waters and florida keys. A waterspout was
reported off of summerland key in hawk channel in association one
of the stronger isolated cells. Goes-16 (experimental and non-
operational) IR bands show a wedge of cloud cover covering south
florida, from naples to key west.

Cimms analysis still shows a 850-500mb ribbon of vorticity (left
by a remnant frontal boundary) lingering along the florida keys.

The 00z key sounding reveals a significant wedge of dry air from
700mb-200mb, with a pwat of 1.58 - down a quarter inch from this
morning.

Temperatures across the island chain range from 80 to 83 degrees.

Dew points are in the low to mid 70s. ASOS and wxflow sites report
winds ranging from 5 to 12 mph. Across our marine district, cman
stations report 10 to 20 kt winds (some contaminated by showers)
generally out of the northeast.

Short term
With showers present, and with the possibility activity becoming
a bit more robust with the increasing wind surge overnight,
decided to nudge rain chances up to scattered categories
overnight. Thereafter, another lull in coverage will likely occur.

The boundary layer will be able to retain its moisture through the
short term, so despite continental air filtering into the upper-
levels (a the spinning anticyclone continues to build in the
carolinas), the potential will exist for showers - all that is
needed is a trigger. Otherwise, aside from minor tweaks, the
forecast package remains on track.

Marine
Winds have increased as expected this evening, and will freshen
overnight and into Friday as an anticyclone builds across the
southeastern us, tightening the pressure gradient across our
coastal waters. Small craft should exercise caution across all
coastal waters except for the florida bay tonight. A small craft
advisory will likely be required Friday through Saturday night for
a significant portion of our coastal waters. A small craft
advisory may be required Sunday and Sunday night for a portion of
our coastal waters.

Aviation
Occasional sub-vfr conditions may be possible with any shower
impact overnight at eyw or mth. Otherwise, expectVFR conditions
to continue. Northeasterly winds of 5 to 10 knots will become
east-northeasterly and increase to 10 to 13 knots after 20 15z,
with gusts eclipsing 20 knots.

Key watches warnings advisories
Fl... None.

Gm... None.

Public marine fire aviation nowcasts... .Mclovin
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
KYWF1 - 8724580 - Key West, FL 15 mi41 min ENE 5.1 G 11 81°F 84°F1016.4 hPa
SANF1 - Sand Key, FL 20 mi39 min 81°F 1017.2 hPa (+1.5)73°F
VCAF1 - 8723970 - Vaca Key, FL 25 mi41 min E 8.9 G 12 80°F 84°F1016.3 hPa
PKYF1 - Peterson Key, FL 49 mi149 min 84°F

Wind History for Key West, FL
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Key West Naval Air Station, FL9 mi96 minENE 1110.00 miMostly Cloudy81°F77°F88%1016.2 hPa
Key West International Airport, FL12 mi36 minENE 710.00 miMostly Cloudy81°F73°F79%1016.7 hPa

Wind History from NQX (wind in knots)
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Last 24hrNE3NE4NE4NE5NE8NE8NE8NE7NE7NE9NE10NE8N9--NE7NE7NE7NE8N9N8NE7NE10NE11NE11
1 day ago--------E13
G19
N9NE5NE13NE9E6E10E8E7SE11E9E7E9E7E5NE3NE7E6NE3NE3
2 days agoNE4CalmCalmNE3NE3N3NE3E4----NE7E10E10E9E7E10NE10E8E10E10E9E11E10N9

Tide / Current Tables for Key Lois, southeast end, Florida
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Key Lois
Click for Map
Thu -- 03:09 AM EDT     0.26 feet Low Tide
Thu -- 07:11 AM EDT     Moonrise
Thu -- 07:25 AM EDT     Sunrise
Thu -- 09:21 AM EDT     2.11 feet High Tide
Thu -- 03:12 PM EDT     New Moon
Thu -- 03:12 PM EDT     0.48 feet Low Tide
Thu -- 06:55 PM EDT     Sunset
Thu -- 07:11 PM EDT     Moonset
Thu -- 09:11 PM EDT     2.33 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
1.30.80.40.30.40.71.11.51.92.12.11.81.410.70.50.60.91.41.82.22.32.32

Tide / Current Tables for Bahía Honda Harbor (Bridge) Florida Current
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Bahía Honda Harbor (Bridge) Florida Current
Click for Map
Thu -- 02:30 AM EDT     -2.66 knots Max Ebb
Thu -- 05:44 AM EDT     0.00 knots Slack
Thu -- 07:10 AM EDT     Moonrise
Thu -- 07:25 AM EDT     Sunrise
Thu -- 08:41 AM EDT     1.95 knots Max Flood
Thu -- 11:41 AM EDT     -0.00 knots Slack
Thu -- 02:58 PM EDT     -2.53 knots Max Ebb
Thu -- 03:12 PM EDT     New Moon
Thu -- 06:12 PM EDT     0.00 knots Slack
Thu -- 06:54 PM EDT     Sunset
Thu -- 07:11 PM EDT     Moonset
Thu -- 08:46 PM EDT     1.51 knots Max Flood
Thu -- 11:35 PM EDT     -0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
-1.1-2.1-2.6-2.6-2-0.90.31.31.91.91.60.8-0.4-1.5-2.3-2.5-2.2-1.4-0.20.81.41.51.20.6

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 (23,6,7,8)
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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.