Friday, July3, 2020
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Marine Weather and Tides
Key Colony Beach, 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 6:41AMSunset 8:21PM Friday July 3, 2020 11:43 PM EDT (03:43 UTC) Moonrise 6:06PMMoonset 4:04AM Illumination 98% 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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GMZ053 Expires:202007040830;;279705 Fzus52 Kkey 040222 Cwfkey Coastal Waters Forecast For The Florida Keys National Weather Service Key West Fl 1022 Pm Edt Fri Jul 3 2020 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. Gmz052>055-072>075-040830- Straits Of Florida From Ocean Reef To Craig Key Out 20 Nm- Straits Of Florida From Craig Key To West End Of Seven Mile Bridge Out 20 Nm- Straits Of Florida From West End Of Seven Mile Bridge To South Of Halfmoon Shoal Out 20 Nm- Straits Of Florida From Halfmoon Shoal To 20 Nm West Of Dry Tortugas Out 20 Nm- Straits Of Florida From Ocean Reef To Craig Key 20 To 60 Nm Out- Straits Of Florida From Craig Key To West End Of Seven Mile Bridge 20 To 60 Nm Out- Straits Of Florida From West End Of Seven Mile Bridge To South Of Halfmoon Shoal 20 To 60 Nm Out- Straits Of Florida From Halfmoon Shoal To 20 Nm West Of Dry Tortugas 20 To 60 Nm Out- 1022 Pm Edt Fri Jul 3 2020
Overnight..Variable winds 5 to 10 knots. Seas around 1 foot. Isolated showers and Thunderstorms.
Saturday..South to southwest winds near 5 knots. Seas around 1 foot. Isolated showers and Thunderstorms.
Saturday night..Southwest winds near 5 knots. Seas around 1 foot. Isolated showers and Thunderstorms.
Sunday..South to southwest winds near 5 knots. Seas around 1 foot. Scattered showers and Thunderstorms.
Sunday night..East to southeast winds near 5 knots. Seas 1 to 2 feet. Isolated showers and Thunderstorms.
Monday..East winds 5 to 10 knots. Seas 1 to 2 feet. Isolated showers and Thunderstorms.
Monday night..East winds 5 to 10 knots. Seas 1 to 2 feet. Isolated showers and Thunderstorms.
Tuesday..East winds near 10 knots. Seas around 2 feet. Isolated showers and Thunderstorms.
Tuesday night..East winds 10 to 15 knots. Seas 2 to 3 feet. Isolated showers and Thunderstorms.
Wednesday and Wednesday night..East winds near 10 knots. Seas 2 to 3 feet. Isolated showers and Thunderstorms.


7 Day Forecast for Marine Location Near Key Colony Beach, FL
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location: 24.7, -81.1     debug


Area Discussion for - Key West, FL
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FXUS62 KKEY 040222 AFDKEY

Area Forecast Discussion National Weather Service Key West FL 1022 PM EDT Fri Jul 3 2020

DISCUSSION. A few rounds of scattered showers developed along a cloud line just north of the Lower Keys during the afternoon hours, but most of these were rather short-lived. Currently, radars show no precipitation across the area. Temperatures along the island chain are slowly dropping through the 80s, and winds on land are light and variable.

Surface analysis depicts a very weak high pressure ridge axis extending from the western Atlantic through the central Bahamas and the Straits of Florida into the central Gulf of Mexico. Aloft, lower to mid level ridging has shifted slightly southward during the past 24 hours, with the ridge axis now located near Cuba. The 00Z Key West sounding reflects the weakened influence of the ridging aloft, with only a weak inversion near 3000 feet and PW up to 1.90 inches or slightly above normal for this date. However, there is still a fairly dry airmass in the mid levels, with dewpoint depressions in the 700-500 mb layer averaging around 10C. This dry layer likely prevented the afternoon cloud line activity from being more vigorous or longer-lived.

Overnight, there is some chance that the old cloud line just north of the Lower Keys may reactivate during the late night, and isolated showers could develop elsewhere as well, with the airmass not as dry and stable as it has been in recent days. Will not make any change to the existing 20 percent PoPs for the overnight period. Lows by morning should reach the lower 80s for most locations, with winds remaining light and variable to calm.

MARINE. Evening observations show benign conditions across the Keys coastal waters, with mostly SW to W breezes of 5 knots or less prevailing along the reef and in the Gulf waters. Similar conditions will continue overnight, and no significant changes are planned for the late evening forecast issuance.

AVIATION. VFR conditions will prevail overnight into early Friday morning at the EYW and MTH terminals, with only few to scattered cumulus around 2500 feet and little to no shower activity. Conditions should be favorable for a reverse cloud line to develop along the Keys by later Sunday morning and into the afternoon, with the potential for a few rounds of showers and storms at least in the vicinity of either terminal. These could produce short periods of MVFR conditions. For now, have included VCSH and increased cloud cover at both terminals beginning at 15Z.

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

Public/Marine/Fire . Jacobson Aviation/Nowcasts . Jacobson Data Acquisition . DR

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 1 mi56 min 85°F 93°F1014.9 hPa
SMKF1 - Sombrero Key, FL 5 mi44 min S 1.9 G 2.9
LONF1 - Long Key, FL 16 mi44 min S 1.9 G 2.9 86°F 1015.1 hPa74°F
LRKF1 - Little Rabbit Key, FL 24 mi164 min 93°F
PKYF1 - Peterson Key, FL 24 mi104 min 92°F
JKYF1 - Johnson Key, FL 27 mi104 min 93°F
MUKF1 - Murray Key, FL 29 mi104 min 91°F
BKYF1 32 mi104 min 96°F
BOBF1 - Bob Allen, FL 32 mi104 min 94°F
WRBF1 - Whipray Basin, FL 32 mi104 min SW 5.1 96°F
GBTF1 - Garfield Bight, FL 36 mi104 min 95°F
TBYF1 37 mi104 min 96°F
KYWF1 - 8724580 - Key West, FL 39 mi56 min 86°F 91°F1015.1 hPa
LMDF1 - Little Madeira, FL 41 mi104 min 94°F
BNKF1 - Butternut Key, FL 41 mi104 min 94°F
LRIF1 42 mi104 min 94°F
TRRF1 - Taylor River, FL 43 mi104 min 98°F
SANF1 - Sand Key, FL 44 mi44 min NNW 4.1 G 5.1
NRRF1 45 mi104 min 92°F
SREF1 45 mi104 min 92°F
DKKF1 - Duck Key, FL 46 mi164 min 94°F
TCVF1 - Trout Cove, FL 46 mi164 min 95°F
GBIF1 - Gunboat Island, FL 47 mi104 min 91°F
BWSF1 - Blackwater Sound, FL 48 mi164 min 94°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, FL4 mi51 minS 310.00 miFair85°F75°F72%1014.5 hPa

Link to 5 minute data for KMTH

Wind History from MTH (wind in knots)
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Last 24hrSE6SE5SE54CalmSE3S33Calm33S5SE4SE6S6S6S5S5SW53SW4CalmCalmS3
1 day agoE4E33SE5SE33E3E4SE5SE44SE4SE7SE55SE6SE4S6S5CalmCalmSE3SE3SE4
2 days agoCalmSE3SE3E4E3E3SE4SE5SE4SE443SE5SE6S5444S54CalmCalmE4E4

Tide / Current Tables for Boot Key Harbor, Vaca Key, Florida
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Boot Key Harbor
Click for Map
Fri -- 01:12 AM EDT     0.55 feet Low Tide
Fri -- 05:04 AM EDT     Moonset
Fri -- 06:39 AM EDT     Sunrise
Fri -- 07:42 AM EDT     2.41 feet High Tide
Fri -- 02:57 PM EDT     -0.48 feet Low Tide
Fri -- 07:06 PM EDT     Moonrise
Fri -- 08:17 PM EDT     Sunset
Fri -- 09:45 PM EDT     1.18 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.70.60.60.91.31.82.12.42.42.21.91.30.70.1-0.3-0.5-0.3-00.30.711.11.21.1

Tide / Current Tables for Moser Channel (swingbridge), Florida Current
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Moser Channel (swingbridge)
Click for Map
Fri -- 02:33 AM EDT     -1.78 knots Max Ebb
Fri -- 05:04 AM EDT     Moonset
Fri -- 05:37 AM EDT     0.00 knots Slack
Fri -- 06:40 AM EDT     Sunrise
Fri -- 08:16 AM EDT     1.17 knots Max Flood
Fri -- 10:51 AM EDT     -0.00 knots Slack
Fri -- 02:26 PM EDT     -2.49 knots Max Ebb
Fri -- 05:50 PM EDT     0.00 knots Slack
Fri -- 07:06 PM EDT     Moonrise
Fri -- 08:17 PM EDT     Sunset
Fri -- 09:10 PM EDT     2.10 knots Max Flood
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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-0.5-1.3-1.7-1.7-1.3-0.50.30.91.21.10.7-0.1-1.1-2-2.4-2.4-1.9-10.21.21.82.121.4

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 (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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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.