Monday, December9, 2019
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Marine Weather and Tides
Big Pine Key, 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 6:58AMSunset 5:40PM Monday December 9, 2019 7:19 AM EST (12:19 UTC) Moonrise 4:00PMMoonset 4:24AM Illumination 94% Phase: Waxing Gibbous; Moon at 12 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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GMZ032 Bayside And Gulf Side From Craig Key To West End Of Seven Mile Bridge- Gulf Of Mexico From West End Of Seven Mile Bridge To Halfmoon Shoal Out To 5 Fathoms- 447 Am Est Mon Dec 9 2019
Today..East winds 10 to 15 knots. Seas 1 to 2 feet. NEarshore waters a light to moderate chop. Isolated showers.
Tonight through Tuesday night..East to southeast winds 10 to 15 knots. Seas 1 to 2 feet. NEarshore waters a light to moderate chop. Isolated showers.
Wednesday..East to southeast winds 5 to 10 knots. Seas 1 foot or less. NEarshore waters smooth to a light chop. Isolated showers.
Wednesday night..Northeast to east winds near 10 knots. Seas around 1 foot. NEarshore waters a light chop. Isolated showers.
Thursday..Northeast to east winds 10 to 15 knots. Seas 1 to 2 feet. NEarshore waters a light to moderate chop. Isolated showers.
Thursday night..East winds near 15 knots. Seas 1 to 3 feet. NEarshore waters a moderate chop. Isolated showers.
Friday..East to southeast winds 10 to 15 knots. Seas 1 to 2 feet. NEarshore waters a light to moderate chop. Isolated showers.
Friday night..Southeast to south winds near 10 knots. Seas around 1 foot. NEarshore waters a light chop. Scattered showers.


7 Day Forecast for Marine Location Near Big Pine Key, FL
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location: 24.73, -81.41     debug


Area Discussion for - Key West, FL
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FXUS62 KKEY 091051 AFDKEY

Area Forecast Discussion National Weather Service Key West FL 551 AM EST Mon Dec 9 2019

DISCUSSION. Temperatures are mainly in the lower 70s across the Florida Keys early this morning. Dew points have now risen into the upper 60s, with easterly surface flow finally taking hold over the coastal waters. Skies are partly cloudy across the region, due mainly to cumulus generated from a combination of weak speed convergence and isentropic upglide. Key West radar is detecting isolated light showers in association with the weak low level lift.

This forecast comes in three distinct parts, beginning with the near term (today through tomorrow night). Generally warm and dry sensible weather can be expected, as mid to upper level ridging becomes more prominent amid decent southeasterly low level flow. As a result dew points will continue to rise into the mid 70s, quite muggy for December. This will keep temperatures from falling into the 60s for the foreseeable future, with high temperatures reaching the lower to mid 80s.

The situation becomes complicated starting on Wednesday, as a shortwave trough currently digging southward through the state of California eventually emerges into the western Gulf of Mexico. While this shortwave once had aspirations of driving a cold front through the area, it is now quite apparent that it will lack the strength to truly challenge the ridging aloft. Nevertheless, the ridge will be flattened and this will set the stage for the next shortwave trough that is forecast to enter the Gulf near the same latitude on Friday. In the meantime, sensible weather conditions in the Keys will remain warm and mostly dry.

Finally, the most interesting and uncertain portion of the forecast (Friday through Sunday night) features the prospect of a developing low pressure system in the Gulf. This potential system will be completely dependent on the second aforementioned shortwave trough, which has not even been generated yet, from a parent longwave trough currently located in the central Pacific. The eventual strength, positioning, and trajectory of this shortwave will determine the sensible conditions we ultimately experience in the Keys. Deterministic global model runs remain highly erratic, and until there is more consistency from run-to- run this portion of the forecast will remain highly uncertain (particularly winds and PoPs). Regardless, it is becoming more clear that the next substantial cold front to cross the Keys will have to wait at least another week. Above average temps continue.

MARINE. No watches, warnings, or advisories are currently in effect for the coastal waters of the Florida Keys. However, Small Craft should Exercise Caution for increasing winds in the Straits of Florida. Generally speaking, moderate to occasionally fresh east to southeast breezes will prevail through Tuesday night. From the synopsis: A ridge of high pressure extends from the western North Atlantic southwestward into the Florida Keys, maintaining moderate to occasionally fresh east to southeast breezes through Tuesday evening. A dying cold front over the Gulf of Mexico will erode the western flank of the ridge axis late Tuesday night through Wednesday night, allowing breezes to diminish. Another weak area of low pressure will fester over the Gulf of Mexico Thursday and Thursday night.

AVIATION. Until 00z/9th, outside of an episode or two of MVFR conditions, mainly this morning, VFR conditions are expected at the Key West and Marathon terminals. Cloud bases will generally be near 025. Otherwise, mainly east to southeast winds of around 10 knots will become gusty between 16 and 18 knots at the terminals late this morning through this evening.

CLIMATE. In 1928, the daily record low temperature of 53 degrees was recorded in Key West. Temperature records date back in 1872.

PRELIMINARY POINT TEMPS/POPS. Key West 81 75 83 76 / 10 20 10 20 Marathon 81 76 85 77 / 10 20 10 20

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



Public/Marine/Fire . WLC Aviation/Nowcasts . APA 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
VCAF1 - 8723970 - Vaca Key, FL 16 mi50 min E 4.1 G 6 75°F 73°F1018.6 hPa
SMKF1 - Sombrero Key, FL 17 mi30 min E 12 G 13 77°F 69°F
KYWF1 - 8724580 - Key West, FL 24 mi50 min 71°F 79°F1018.5 hPa
LONF1 - Long Key, FL 30 mi30 min 75°F 1017.7 hPa71°F
SANF1 - Sand Key, FL 31 mi30 min ESE 14 G 16 78°F 1016.9 hPa68°F
JKYF1 - Johnson Key, FL 35 mi80 min 71°F
LRKF1 - Little Rabbit Key, FL 36 mi140 min 72°F
MUKF1 - Murray Key, FL 36 mi80 min 71°F
PKYF1 - Peterson Key, FL 37 mi80 min 73°F
BKYF1 41 mi80 min 72°F
WWEF1 43 mi140 min 71°F
WRBF1 - Whipray Basin, FL 43 mi80 min N 6 73°F
BOBF1 - Bob Allen, FL 44 mi80 min 73°F
GBTF1 - Garfield Bight, FL 44 mi80 min 73°F
CWAF1 44 mi140 min 71°F
SREF1 46 mi80 min 71°F
LRIF1 47 mi80 min 72°F
TBYF1 47 mi80 min 71°F
GBIF1 - Gunboat Island, FL 49 mi80 min 70°F

Wind History for Vaca Key, FL
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Key West Naval Air Station, FL18 mi27 minENE 510.00 miA Few Clouds73°F68°F84%1018.5 hPa
The Florida Keys - Marathon International Airport, FL19 mi27 minE 410.00 miA Few Clouds75°F68°F79%1018.5 hPa
Key West International Airport, FL22 mi27 minENE 410.00 miA Few Clouds72°F68°F87%1018.6 hPa

Link to 5 minute data for KNQX

Wind History from NQX (wind in knots)
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Last 24hrNE5NE6E10E11NE11E10E11E12E10E9E11E10E11E11E6NE5NE5NE6NE6E6NE5NE5NE5E5
1 day agoN6N8NE9NE10NE11N11N9NE10N9N6N6N7N6N4N4NE4NE4NE4NE5NE5NE4NE4NE5NE6
2 days agoE5E7E7N9NE5N7N4CalmN6N4N5N7N5N5N3N4N6NE6NE8NE7NE4NE4NE4NE5

Tide / Current Tables for Howe Key, south end, Harbor Channel, Florida
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Howe Key
Click for Map
Mon -- 04:25 AM EST     Moonset
Mon -- 06:31 AM EST     0.09 feet Low Tide
Mon -- 06:58 AM EST     Sunrise
Mon -- 12:59 PM EST     0.99 feet High Tide
Mon -- 03:59 PM EST     Moonrise
Mon -- 05:37 PM EST     Sunset
Mon -- 06:01 PM EST     0.37 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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1.31.210.80.50.20.10.10.20.40.60.80.910.90.80.60.40.40.40.60.81.11.3

Tide / Current Tables for No Name Key (northeast of), Florida Current
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No Name Key (northeast of)
Click for Map
Mon -- 03:27 AM EST     0.00 knots Slack
Mon -- 04:24 AM EST     Moonset
Mon -- 06:54 AM EST     0.85 knots Max Flood
Mon -- 06:58 AM EST     Sunrise
Mon -- 09:37 AM EST     -0.00 knots Slack
Mon -- 12:17 PM EST     -0.86 knots Max Ebb
Mon -- 03:58 PM EST     Moonrise
Mon -- 04:03 PM EST     0.00 knots Slack
Mon -- 05:36 PM EST     Sunset
Mon -- 06:59 PM EST     0.57 knots Max Flood
Mon -- 09:19 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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-1-0.8-0.6-0.20.20.60.80.90.70.3-0.2-0.7-0.8-0.8-0.6-0.4-00.30.50.60.50.2-0.4-0.8

Weather Map
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wmap_A
GEOS 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.
Link to Loop

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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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.