Monday, December9, 2019
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Marine Weather and Tides
Layton, FL

Version 3.4
NOTICE
10/9/2019 Updated the Marine Zones.
9/4/2019 Fixed the weather maps due to NOAA moving them.
7/25/2019 New feature in the Airports section gives a link to 5 minute updates for data reports.
6/2/2019. Many thanks to a user for reporting an error on one of the Edit pages. The switch to PHP 7.2 caused many pages that previously worked to quit working. I fixed many but I still depend on users to report ones I missed. Please report errors HERE or send an email to me at L-36.com. Allen

Sunrise 6:55AMSunset 5:33PM Monday December 9, 2019 12:42 PM EST (17:42 UTC) Moonrise 3:56PMMoonset 4:21AM Illumination 95% Phase: Waxing Gibbous; Moon at 13 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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GMZ043 Expires:201912092130;;095078 Fzus52 Kkey 091523 Cwfkey Coastal Waters Forecast For The Florida Keys National Weather Service Key West Fl 1023 Am Est Mon Dec 9 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>044-092130- 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- 1023 Am Est Mon Dec 9 2019
This afternoon..East winds near 15 knots. Seas 2 to 3 feet. NEarshore waters a moderate chop. Isolated showers.
Tonight through Tuesday night..East to southeast winds near 15 knots. Seas 2 to 4 feet. NEarshore waters a moderate chop. Isolated showers.
Wednesday..Southeast winds 10 to 15 knots early, becoming east at 5 to 10 knots. Seas 2 to 3 feet, subsiding to 1 to 2 feet. NEarshore waters a light to moderate chop, becoming smooth to a light chop. Isolated showers.
Wednesday night..Northeast to east winds near 10 knots. Seas 1 to 2 feet. NEarshore waters a light chop. Scattered showers.
Thursday..Northeast to east winds 10 to 15 knots. Seas 1 to 3 feet. NEarshore waters a light to moderate chop. Isolated showers.
Thursday night..East winds near 15 knots. Seas 2 to 4 feet. NEarshore waters a moderate chop. Isolated showers.
Friday..East to southeast winds 10 to 15 knots. Seas 2 to 3 feet. NEarshore waters a light to moderate chop. Isolated showers.
Friday night..Southeast to south winds near 10 knots. Seas 1 to 2 feet. NEarshore waters a light chop. Scattered showers.


7 Day Forecast for Marine Location Near Layton, FL
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location: 24.8, -80.65     debug


Area Discussion for - Key West, FL
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FXUS62 KKEY 091554 AFDKEY

Area Forecast Discussion National Weather Service Key West FL 1054 AM EST Mon Dec 9 2019

DISCUSSION. Water vapor imagery shows a relatively benign and flat upper level pattern across the eastern two-thirds of the US. Downstream there still remains a weak upper level trough that is positioned between Bermuda and the Bahamas. This feature is continuing on an eastward trek. Looking upstream, a deep positive tilted trough is moving out of California and into the Four Corners region. This trough extends from a parent upper level low centered just northeast of Hudson Bay. Meanwhile, ridge that was previously located in western Mexico continues to push east and is now centered near Honduras/Nicaragua.

At the surface, high pressure over the western North Atlantic continues its eastward exodus in response to a strengthening low that is moving northeast through the Great Lakes region. A trailing cold front associate with the low stretches from the upper Great Lakes to the Texas Panhandle. Behind this front is another high pressure cell digging southeast from the northern High Plains and ultimately driving the front southeast.

Closer to home, visible satellite shows quite a bit of cu developing in the southeast flow just above the surface, and moving over the Keys. Key West radar continues to show some light showers associated with a speed and directional convergence over the western Florida Straits. These showers are moving to the northwest at generally 15 knots. A few stray showers did manage to move through the Lower Keys just after midnight and the airport in Key West reported 0.08 inches of rainfall. Temperatures have warmed up a little faster than expected with the Lower and Middle Keys already at or around 80 degrees. Winds are generally E/SE at around 10 knots or less, strongest in the Lower Keys.

Short term update - No big changes made, however given the fact that we have warmed to near 80 in the Lower and Middle Keys, have upped the temperatures a couple degrees. Still expecting temperatures to hold out in the lower 80s given that clouds will be moving across the Keys for the remainder of the daytime heating period. Easterly winds will keep overnight temperatures mild, only expecting temperatures to fall into the mid 70s tonight. Otherwise, no changes planned or needed for the short term.

MARINE. Gentle to moderate E/SE breezes are occurring for most waters with the exception of the Florida Straits where moderate to fresh breezes are ongoing. As such, a Small Craft Should Exercise Caution (SCEC) headline is in effect for these waters. Winds will maintain this strength through at least Tuesday due to the ridge in the North Atlantic extending south and southwestward. At this time it appears that only the Florida Straits will need SCEC headlines through Tuesday.

AVIATION. VFR conditions are expected at both island terminals for the rest of this morning and afternoon. Only SCT cloud coverage is anticipated through 00z, with bases generally around 2500 feet. East to southeast winds should increase to around 10 knots this afternoon, with occasional gusts between 15 to 18 knots.

KEY WATCHES/WARNINGS/ADVISORIES. FL . None. GM . None.

Public/Marine/Fire . LIW Aviation/Nowcasts . BT Data Collection . NB

Visit us on the web at weather.gov/key

Follow us on Facebook and Twitter at: www.facebook.com/nwskeywest www.twitter.com/nwskeywest


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
PKYF1 - Peterson Key, FL 10 mi102 min 73°F
LONF1 - Long Key, FL 12 mi32 min 77°F 1017.6 hPa72°F
BOBF1 - Bob Allen, FL 16 mi102 min 73°F
LRKF1 - Little Rabbit Key, FL 16 mi162 min 74°F
WRBF1 - Whipray Basin, FL 19 mi102 min ENE 5.1 73°F
BNKF1 - Butternut Key, FL 21 mi102 min 72°F
JKYF1 - Johnson Key, FL 22 mi102 min 72°F
BKYF1 24 mi102 min 73°F
VCAF1 - 8723970 - Vaca Key, FL 25 mi60 min ESE 8.9 G 12 80°F 74°F1019 hPa
TBYF1 25 mi102 min 72°F
LMDF1 - Little Madeira, FL 26 mi102 min 74°F
MUKF1 - Murray Key, FL 26 mi102 min 73°F
GBTF1 - Garfield Bight, FL 27 mi102 min 73°F
SMKF1 - Sombrero Key, FL 27 mi32 min E 14 G 17 78°F 71°F
DKKF1 - Duck Key, FL 28 mi162 min 72°F
BWSF1 - Blackwater Sound, FL 28 mi162 min 72°F
TRRF1 - Taylor River, FL 29 mi102 min 72°F
TCVF1 - Trout Cove, FL 29 mi162 min 73°F
JBYF1 30 mi102 min 72°F
LBSF1 - Little Blackwater, FL 31 mi162 min 71°F
THRF1 32 mi162 min 71°F
LSNF1 - Long Sound, FL 32 mi102 min 73°F
HCEF1 - Highway Creek, FL 33 mi102 min 74°F
WWEF1 34 mi162 min 71°F
LRIF1 36 mi102 min 72°F
MDKF1 36 mi102 min 72°F
CWAF1 39 mi162 min 71°F
NRRF1 40 mi102 min 69°F
SREF1 45 mi102 min 71°F
TPEF1 - Tarpon Bay East, FL 45 mi162 min 69°F
GBIF1 - Gunboat Island, FL 45 mi102 min 71°F
CANF1 - Cane Patch, FL 46 mi102 min 68°F
HREF1 48 mi102 min 70°F

Wind History for Vaca Key, FL
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
The Florida Keys - Marathon International Airport, FL22 mi49 minE 710.00 miA Few Clouds83°F71°F67%1018.6 hPa

Link to 5 minute data for KMTH

Wind History from MTH (wind in knots)
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Last 24hrNE8E10E6E8E8E7E7E7E8E7E6E9E5E6E6E4E5E6E4E5E9E8E7E7
1 day agoN9N7NE7NE6NE5N4N4NE5NE5N4N4NE5N7N6N5NE5NE6NE6NE6NE6NE7NE9NE9NE9
2 days agoNE9NE9NE8NE7NE6NE6NE5NE7NE6NE5NE4N6N7N8N8NE7NE6NE5NE6N5N8N10NE10NE11

Tide / Current Tables for Alligator Reef Light, Florida (2)
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Alligator Reef Light
Click for Map
Mon -- 12:07 AM EST     0.21 feet Low Tide
Mon -- 04:21 AM EST     Moonset
Mon -- 06:34 AM EST     2.18 feet High Tide
Mon -- 06:55 AM EST     Sunrise
Mon -- 12:36 PM EST     0.46 feet Low Tide
Mon -- 03:55 PM EST     Moonrise
Mon -- 05:33 PM EST     Sunset
Mon -- 06:34 PM EST     2.08 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.20.30.611.51.92.12.221.61.10.70.50.50.711.41.822.11.81.40.90.5

Tide / Current Tables for Long Key, east of drawbridge, Florida Current
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Long Key
Click for Map
Mon -- 12:19 AM EST     -1.33 knots Max Ebb
Mon -- 03:37 AM EST     0.00 knots Slack
Mon -- 04:22 AM EST     Moonset
Mon -- 06:56 AM EST     Sunrise
Mon -- 06:56 AM EST     1.28 knots Max Flood
Mon -- 10:09 AM EST     -0.00 knots Slack
Mon -- 12:59 PM EST     -1.16 knots Max Ebb
Mon -- 03:56 PM EST     Moonrise
Mon -- 04:10 PM EST     0.00 knots Slack
Mon -- 05:34 PM EST     Sunset
Mon -- 06:54 PM EST     0.90 knots Max Flood
Mon -- 09:47 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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-1.3-1.3-1-0.40.30.81.21.31.20.80.1-0.6-1-1.2-1-0.7-0.10.50.80.90.80.4-0.1-0.8

Weather Map
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wmap_A
GEOS 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.
Link to Loop

Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for Key West, FL (12,3,4,5)
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Ground Weather Radar Station Miami, FL
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weather_mapweather_map weather_map

Gulf Stream Current


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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.