Tuesday, April25, 2017 L-36.com


Marine Weather and Tides
Big Pine Key, FL

Version 3.4
What's New / NOTES
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.
3/12/2015 - Added section for Gulf current for users in the GMZ marine zones.
This was requested by a user. If you have requests, please let me know.

Sunrise 6:54AMSunset 7:55PM Tuesday April 25, 2017 8:28 AM EDT (12:28 UTC) Moonrise 5:25AMMoonset 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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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- 434 Am Edt Tue Apr 25 2017
Today..West to northwest winds 10 to 15 knots. Seas 1 to 2 feet. NEarshore waters a light to moderate chop.
Tonight..Northwest to north winds 5 to 10 knots becoming east early in the morning. Seas 1 foot or less. NEarshore waters smooth to a light chop.
Wednesday..East to southeast winds near 10 knots. Seas around 1 foot. NEarshore waters a light chop.
Wednesday night..East to southeast winds 10 to 15 knots. Seas 1 to 2 feet. NEarshore waters a light to moderate chop.
Thursday..Southeast winds near 10 knots. Seas around 1 foot. NEarshore waters a light chop.
Thursday night..East to southeast winds 10 to 15 knots. Seas 1 to 2 feet. NEarshore waters a light to moderate chop.
Friday..East to southeast winds near 15 knots. Seas 1 to 3 feet. NEarshore waters a moderate chop. Isolated showers.
Friday night..East to southeast winds 15 to 20 knots. Seas 2 to 3 feet. NEarshore waters choppy. Isolated showers.
Saturday..East to southeast winds 15 to 20 knots. Seas 2 to 3 feet. NEarshore waters choppy. Isolated showers.
Saturday night..East to southeast winds near 20 knots. Seas 2 to 4 feet. NEarshore waters rough. 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 250903
afdkey
area forecast discussion
national weather service key west fl
503 am edt Tue apr 25 2017

Discussion
A weak cold front passed through the florida keys yesterday late
afternoon and evening, followed by a short-lived period of fresh
west to northwest breezes. However, within the last few hours,
wind speeds have dropped, and currently, are averaging 10-15 knots
over water, and 10-15 mph over land. Latest doppler radar scans
are void of precipitation echoes over the florida keys or
adjoining coastal waters, while geostationary satellite images
from the short-wave infrared channel show few to scattered shallow
stratocumulus clouds moving from west to east along and north of
the keys, within the far southern cyclonic envelope of a
northeastward-moving, deep, midlatitude cyclone. Incoming air
trajectories are rooted in highly modified continental polar air,
having traveled several hundred miles of the gulf of mexico.

Therefore, the air mass change since yesterday is only modest to
say the least. Current air temperatures in most keys island
communities are in the lower 70s, with dewpoint temperatures in
the mid 60s.

For today, any discernible low-level cold thermal advection will
cease by afternoon, and air temperatures will easily reach near
80f in most communities, under generally sunny skies. Gentle to
moderate west breezes will prevail, with an afternoon surge
developing mainly from key largo to ocean reef.

Tonight, a developing low-level ridge will move northward across
the service area, with initially gentle moderate west breezes
turning north or light and variable by midnight. The light winds
and mostly clear skies will result in radiative cooling, and we
should see air temperatures dropping to the upper 60s in many
areas. The next 24 hours will, by far, be the most "comfortable"
for humans.

Wednesday, weak low-level warm thermal advection will commence as
a ridge moves farther northward and low-level winds attain a
southerly component. By Wednesday night, true maritime tropical
air will be arriving at the surface. However, a deep layer of dry,
stably stratified air will limit any shower production.

Thursday-Monday, a robust surface anticyclone will expand and
intensify over the western north atlantic, beneath amplifying
ridging aloft. This will lead to freshening east-southeast breezes
and developing isolated shower coverage across the service area.

In addition, immersion in maritime tropical air will result in
high temperatures in the mid 80s, with low temperatures only
dropping to the upper 70s.

Marine
Gentle to moderate west breezes will prevail today most areas at
most times. However, winds are likely to surge in a small area
between the everglades and the straits of florida off the upper
keys late this afternoon, as mainland heating and associated
lowering of pressure induces a localized steeper pressure gradient
between about flamingo and bimini. Effects will be most
noticeable over eastern florida bay and from molasses reef
northward. Breezes should drop off rapidly after sunset.

Nevertheless, small craft should exercise caution in these areas
late this afternoon. Thereafter, an area of high pressure will
build gradually over the florida peninsula from tonight through
Saturday. East-southeast breezes will freshen on Friday, with
small craft advisories possibly required in some zones between
Friday night and Sunday night. At this point, we expect only
isolated showers Thursday and beyond with nil chance of
lightning.

Aviation
Vfr conditions will prevail most of today with the exception of
brief MVFR ceilings at both eyw and mth. Winds from the northwest at
5-10 knots will continue today with occasional gusts to near 15
knots.

Climate
The average high and low temperatures for april 25 at key west,
based on the 30-year (1981-2010) historical mean are 82f and 73f.

The record high temperature is 90f, set in 1991, and the record
low temperature is 64f, set in 2012. The record daily rainfall
total is 2.21 inches, recorded in 1948.

Preliminary point temps/pops
Key west 81 69 83 76 / - - - -
marathon 81 69 85 76 / - - - -

Key watches/warnings/advisories
Fl... None.

Gm... None.

Public/marine/fire... Kasper
aviation/nowcasts... .Kn
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 mi70 min W 8.9 G 11 74°F 78°F1009.9 hPa
KYWF1 - 8724580 - Key West, FL 24 mi70 min WNW 8.9 G 12
LONF1 - Long Key, FL 30 mi88 min W 13 G 14 74°F 77°F1010.6 hPa (+0.9)61°F
SANF1 - Sand Key, FL 31 mi98 min NW 9.9 G 12 74°F 1011.1 hPa (+0.9)61°F
JKYF1 - Johnson Key, FL 35 mi148 min 78°F
MUKF1 - Murray Key, FL 36 mi88 min 76°F
PKYF1 - Peterson Key, FL 37 mi88 min 78°F
BKYF1 41 mi88 min 75°F
WWEF1 43 mi148 min 78°F
WRBF1 - Whipray Basin, FL 43 mi148 min W 11 76°F
GBTF1 - Garfield Bight, FL 44 mi88 min 78°F
BOBF1 - Bob Allen, FL 44 mi88 min 76°F
CWAF1 44 mi148 min 76°F
SREF1 46 mi88 min 77°F
LRIF1 47 mi88 min 78°F
TBYF1 47 mi88 min 79°F
GBIF1 - Gunboat Island, FL 49 mi88 min 77°F

Wind History for Vaca Key, FL
(wind in knots)    EDIT      (on/off)   Help
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Last
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NW7
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W10
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G13
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G11
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G12
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G11
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G13
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G17
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G20
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SE4
G8
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G11
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G7
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G10
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G11
W8
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G13
N5
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N1
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NW1
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NW6
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G12
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E9
G13
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G17
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G14
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G13
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G12
SE7
G11
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G16
SE12
G21
E3
G8
SE6
G12
SE6
G11
SE5
G10
SE5
G9
SE4
G7

Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Key West Naval Air Station, FL18 mi95 minWNW 710.00 miPartly Cloudy72°F62°F71%1010.4 hPa
Marathon, Marathon Airport, FL19 mi95 minW 710.00 miA Few Clouds74°F63°F69%1010.3 hPa
Key West International Airport, FL22 mi95 minWNW 610.00 miA Few Clouds73°F64°F74%1010.6 hPa

Wind History from NQX (wind in knots)
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Last 24hrNW7W8NW10W11W13NW11W9SW14--SW13NW15
G24
NW14NW11W10NW12W10NW10W11W10NW7NW8NW6NW7NW7
1 day ago--E3NE4E7E6NW8N10N10NW9NW11NW11N10N8N5N4N5NW6NW6NW8NW9NW7NW7NW7NW7
2 days agoE14
G21
E15E13E13E14E12E12E7E12E9E16
G20
E13E14E9SE9E9SE14SE16SE17
G21
E10E16SE10SE12SE8

Tide / Current Tables for Howe Key, south end, Harbor Channel, Florida
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Howe Key
Click for Map
Tue -- 02:29 AM EDT     1.13 feet High Tide
Tue -- 06:24 AM EDT     Moonrise
Tue -- 06:54 AM EDT     Sunrise
Tue -- 07:59 AM EDT     0.07 feet Low Tide
Tue -- 02:24 PM EDT     1.29 feet High Tide
Tue -- 07:12 PM EDT     Moonset
Tue -- 07:52 PM EDT     Sunset
Tue -- 08:38 PM EDT     -0.22 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.811.11.110.70.40.20.10.20.40.70.91.11.31.31.10.80.40-0.2-0.2-0.10.2

Tide / Current Tables for No Name Key (northeast of), Florida Current
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No Name Key (northeast of)
Click for Map
Tue -- 02:06 AM EDT     -1.23 knots Max Ebb
Tue -- 05:41 AM EDT     0.00 knots Slack
Tue -- 06:24 AM EDT     Moonrise
Tue -- 06:54 AM EDT     Sunrise
Tue -- 08:42 AM EDT     0.90 knots Max Flood
Tue -- 11:22 AM EDT     -0.00 knots Slack
Tue -- 02:19 PM EDT     -1.37 knots Max Ebb
Tue -- 05:50 PM EDT     0.00 knots Slack
Tue -- 07:11 PM EDT     Moonset
Tue -- 07:52 PM EDT     Sunset
Tue -- 09:08 PM EDT     1.17 knots Max Flood
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
-0.5-1-1.2-1.1-0.8-0.40.20.60.80.90.70.2-0.4-1-1.4-1.3-1-0.50.10.611.21.10.7

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 (8,2,3,4)
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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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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.