Monday, January20, 2020
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Marine Weather and Tides
Big Pine Key, FL

Version 3.4
NOTICE
12/16/2019 NOAA is having trouble with requests that include wind gusts. I am posting graphs without wind gusts until it gets fixed.
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.

Sunrise 7:11AMSunset 6:04PM Monday January 20, 2020 5:56 PM EST (22:56 UTC) Moonrise 3:21AMMoonset 2:30PM Illumination 19% Phase: Waning Crescent; Moon at 25 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- 428 Pm Est Mon Jan 20 2020
.small craft advisory in effect...
Tonight..North winds 15 to 20 knots, increasing to near 20 knots. Seas building to 2 to 3 feet, except 4 to 5 feet west of the marquesas keys. NEarshore waters becoming rough.
Tuesday..Northwest to north winds 15 to 20 knots. Seas 1 to 3 feet, except around 4 feet west of the marquesas keys. NEarshore waters choppy.
Tuesday night..North winds increasing to 25 to 30 knots. Seas building to 3 to 6 feet, except building to 7 to 9 feet west of the marquesas keys. NEarshore waters becoming extremely rough.
Wednesday..North winds near 25 knots, decreasing to near 15 knots. Seas 3 to 6 feet, subsiding to 1 to 3 feet. West of the marquesas keys, seas 7 to 8 feet, subsiding to 3 to 4 feet. NEarshore waters extremely rough, becoming a moderate chop.
Wednesday night..Northeast winds 10 to 15 knots. Seas 1 to 3 feet. NEarshore waters a light to moderate chop.
Thursday..Northeast winds near 15 knots. Seas 2 to 3 feet. NEarshore waters a moderate chop. Isolated showers.
Thursday night..Northeast winds 10 to 15 knots. Seas 1 to 2 feet. NEarshore waters a light to moderate chop. Scattered showers.
Friday..Southeast winds near 10 knots. Seas around 1 foot. NEarshore waters a light chop. Scattered showers.
Friday night..South to southwest winds 5 to 10 knots. Seas 1 foot or less. NEarshore waters smooth to a light chop. Scattered showers.
Saturday..Winds becoming northwest to north and increasing to near 15 knots. Seas building to 1 to 3 feet. NEarshore waters becoming a moderate chop. Isolated showers.
Saturday night..Northwest to north winds near 15 knots. Seas 1 to 3 feet. NEarshore waters a moderate chop. Isolated 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 202039 AFDKEY

Area Forecast Discussion National Weather Service Key West FL 339 PM EST Mon Jan 20 2020

. BY FAR THE COOLEST WEATHER FOR THIS EARLY WINTER SEASON IS EXPECTED TUESDAY NIGHT .

DISCUSSION. CURRENTLY. Under partly cloudy skies and north winds of around 15 mph, temperatures are mainly in the lower Keys. Meanwhile, local radars are void of any precipitation echoes in our region. On our marine district, winds are north ranging from 13 knots to 21 knots at Pulaski Shoal Light.

SHORT TERM. (Today through Thursday) A cold front over South Florida will pass through our entire area later this evening, followed by cooler and drier air. For Tuesday through Wednesday, a secondary cold front combined with a large area of high pressure building southward down the spine of the Florida Peninsula, will result in well below normal temperatures Tuesday, but especially Tuesday night and Wednesday. Current thinking, low temperatures will vary from the mid to upper 40s in the Middle and Upper Keys to near 50 degrees in the Lower Keys on Wednesday morning. In addition, north winds will increase to 20 to 25 mph with higher gusts, making it feel even cooler. Otherwise, outside of a sprinkle, no measurable rainfall is expected. Thereafter, moderating temperatures with only a slight chance of showers is anticipated on Thursday.

LONG TERM. (Thursday night through Monday) In wake of high pressure departing into the western Atlantic Ocean Thursday night, a mid and upper level disturbance will track eastward and across the Gulf of Mexico and the Florida Peninsula early Saturday. Because of the progressive and approaching trough, a cold front may move through our region on Saturday, followed by cooler and drier air. Otherwise, upglide below 700 mb combined with weak mid and upper level ascent will prompt low chance pops for Thursday night through Friday night, before only isolated dime pops return.


MARINE. Although will experience subtle surges and lulls over the next 24 hours, strong north winds will overspread our entire marine district late Tuesday afternoon through Wednesday morning, with winds averaging near 25 knots with gusts of 30 to perhaps 35 knots. Regardless, a Small Craft Advisory will be hoisted for all of our coastal waters beginning tonight. Mariners should stay tuned to later marine forecasts for the expected very strong winds Tuesday night and Wednesday morning.

AVIATION. A cold front currently pushing through extreme southern Florida and the Florida Keys will clear south of the island chain this evening. MVFR CIGS based at 015-020 will persist into the evening, tending to erode as the drier air behind the front infiltrates the terminals. Cross wind gusts to 25 knots can be expected between 22Z and 09Z. A second round of stratocumulus based at 030 is expected Tuesday morning. Rain chances at either terminal are nil.

CLIMATE. January 20, on this date in 1997, the record low temperature of 46F was recorded. Temperatures Tuesday night across the island chain will fall to 45 to 50 degrees, coldest across the Upper Keys. This will not be record cold, but the coldest temperatures so far this winter. Temperature records in Key West date back to 1872.

PRELIMINARY POINT TEMPS/POPS. Key West 61 67 51 62 / - - - - Marathon 60 67 48 61 / - - - -

KEY WATCHES/WARNINGS/ADVISORIES. FL . None. GM . Small Craft Advisory for GMZ031>035- 042>044-052>055-072>075.



Public/Marine/Fire . APA Aviation/Nowcasts . CLR Data Collection . KBL

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
VCAF1 - 8723970 - Vaca Key, FL 16 mi57 min 71°F 75°F1017.9 hPa (-0.3)
SMKF1 - Sombrero Key, FL 17 mi37 min NNW 15 G 17 71°F 64°F
KYWF1 - 8724580 - Key West, FL 24 mi57 min 68°F 78°F1018.7 hPa (-0.0)
SANF1 - Sand Key, FL 31 mi37 min N 18 G 21 67°F 62°F
JKYF1 - Johnson Key, FL 35 mi117 min 75°F
LRKF1 - Little Rabbit Key, FL 36 mi177 min 75°F
MUKF1 - Murray Key, FL 36 mi117 min 77°F
PKYF1 - Peterson Key, FL 37 mi117 min 75°F
42095 37 mi57 min 78°F3 ft
BKYF1 41 mi117 min 79°F
WRBF1 - Whipray Basin, FL 43 mi117 min NNW 9.9 76°F
WWEF1 43 mi177 min 75°F
GBTF1 - Garfield Bight, FL 44 mi117 min 78°F
CWAF1 44 mi177 min 75°F
BOBF1 - Bob Allen, FL 44 mi117 min 77°F
SREF1 46 mi117 min 74°F
LRIF1 47 mi117 min 75°F
TBYF1 47 mi117 min 77°F
GBIF1 - Gunboat Island, FL 49 mi117 min 74°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 mi64 minN 1710.00 miMostly Cloudy71°F62°F73%1018.3 hPa
The Florida Keys - Marathon International Airport, FL19 mi64 minNW 810.00 miA Few Clouds72°F63°F73%1017.7 hPa
Key West International Airport, FL22 mi64 minNNW 12 G 2110.00 miMostly Cloudy70°F63°F79%1018.5 hPa

Link to 5 minute data for KNQX

Wind History from NQX (wind in knots)
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Last 24hrSE9SE8N4N3------CalmCalmNW4N8N7N10N11N13N15N11N9N9N8N14N13N16N17
1 day agoE11E13--E12E11SE11E10E12SE10E10E8SE7SE7SE9E7SE6SE10S13S11S14S13S8S4S9
2 days agoNE8NE8E13E18
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Tide / Current Tables for Howe Key, south end, Harbor Channel, Florida
   EDIT   Weekend mode (on/off)   (on/off)   Help   One Week of Data
Howe Key
Click for Map
Mon -- 03:20 AM EST     Moonrise
Mon -- 05:06 AM EST     -0.15 feet Low Tide
Mon -- 07:11 AM EST     Sunrise
Mon -- 11:59 AM EST     0.62 feet High Tide
Mon -- 02:29 PM EST     Moonset
Mon -- 04:08 PM EST     0.25 feet Low Tide
Mon -- 06:01 PM EST     Sunset
Mon -- 10:58 PM EST     1.25 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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10.70.40.1-0.1-0.2-0.100.20.30.50.60.60.60.50.30.30.30.40.70.91.11.21.2

Tide / Current Tables for No Name Key (northeast of), Florida Current
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No Name Key (northeast of)
Click for Map
Mon -- 02:10 AM EST     0.00 knots Slack
Mon -- 03:20 AM EST     Moonrise
Mon -- 05:38 AM EST     0.86 knots Max Flood
Mon -- 07:10 AM EST     Sunrise
Mon -- 08:22 AM EST     -0.00 knots Slack
Mon -- 11:20 AM EST     -0.63 knots Max Ebb
Mon -- 02:29 PM EST     Moonset
Mon -- 02:59 PM EST     0.00 knots Slack
Mon -- 05:49 PM EST     0.48 knots Max Flood
Mon -- 06:01 PM EST     Sunset
Mon -- 07:49 PM EST     -0.00 knots Slack
Mon -- 11:07 PM EST     -0.99 knots Max Ebb
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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-0.7-0.4-0.10.30.60.80.80.60.2-0.3-0.5-0.6-0.6-0.5-0.300.20.40.50.3-0.1-0.6-0.9-1

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 (17,4,5,8)
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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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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 numerous 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.