Marine Weather and Tides
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 7:18AM||Sunset 7:34PM||Thursday March 23, 2017 12:13 PM EDT (16:13 UTC)||Moonrise 3:10AM||Moonset 2:25PM||Illumination 16%|
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|AMZ651 Coastal Waters From Deerfield Beach To Ocean Reef Fl Out 20 Nm- Waters From Deerfield Beach To Ocean Reef Fl From 20 To 60 Nm Excluding The Territorial Waters Of Bahamas- 945 Am Edt Thu Mar 23 2017 |
.small craft advisory in effect through Saturday morning...
Rest of today..Along the coast, east northeast winds 20 to 25 knots. In the gulf stream, northeast winds 20 to 25 knots becoming east northeast. Seas 2 to 3 feet building to 4 to 6 feet with occasional seas to 8 feet. Dominant period 4 seconds. Intracoastal waters rough in exposed areas. A chance of showers in the morning. A slight chance of Thunderstorms through the day. Showers likely.
Tonight..East northeast winds 20 to 25 knots with gusts to around 35 knots. Seas 6 to 8 feet with occasional seas to 10 feet along the coast and 9 to 11 feet with occasional seas to 14 feet in the gulf stream. Dominant period 8 seconds. North swell 3 feet after midnight. Intracoastal waters rough in exposed areas. A chance of Thunderstorms late in the evening. A chance of showers through the night. A slight chance of Thunderstorms after midnight.
Friday..East winds 20 to 25 knots. Seas 5 to 7 feet with occasional seas to 9 feet along the coast and 7 to 9 feet with occasional seas to 11 feet in the gulf stream. Dominant period 7 seconds. North swell 3 feet in the morning. Intracoastal waters rough in exposed areas. A chance of showers.
Friday night..East winds 20 to 25 knots. Seas 6 to 8 feet with occasional seas to 10 feet. Dominant period 6 seconds. Intracoastal waters rough in exposed areas. A slight chance of showers.
Saturday and Saturday night..East winds 15 to 20 knots. Seas 4 to 6 feet with occasional seas to 8 feet. Intracoastal waters choppy in exposed areas. A slight chance of showers.
Sunday and Sunday night..East northeast winds 10 to 15 knots. Seas 2 to 4 feet with occasional seas to 5 feet. Intracoastal waters a moderate chop.
Monday..East northeast winds 10 to 15 knots. Seas around 2 feet. Intracoastal waters a moderate chop.
|AMZ600 Synopsis For Jupiter Inlet To Ocean Reef Fl Out To 60 Nm And For East Cape Sable To Bonita Beach Fl Out To 60 Nm- 945 Am Edt Thu Mar 23 2017 |
Synopsis..Marine conditions will continue to deteoriate late this morning as a weak frontal boundary moves across the region. There will be a threat for showers and a few storms, along with gusty increasing east-northeast winds through this evening behind the boundary. Hazardous marine conditions, especially for the atlantic waters, are expected to continue through Saturday.
Gulf stream hazards..Winds becoming east-northeast and increasing to 20-25 knots this afternoon. Seas building to 9-11 feet late tonight. The approximate location of the west wall of the gulf stream as of mar 21, 2017 at 1200 utc... 12 nautical miles east southeast of fowey rocks. 18 nautical miles east of port everglades. 15 nautical miles east of lake worth. 18 nautical miles east southeast of jupiter inlet. This data courtesy of the naval oceanographic office.
7 Day Forecast for Marine Location Near Aventura, FLHourly EDIT Help
Area Discussion for - Miami-South Florida, FL  (on/off)  Help NOTE: mouseover dotted underlined text for definition
|Fxus62 kmfl 231423|
area forecast discussion
national weather service miami fl
1023 am edt Thu mar 23 2017
Update Surface analysis this morning showed a large high
pressure cell dominating most of the eastern CONUS with a cold
front draped east to west over central florida. Closer to our
region, south of this feature, conditions have been rather stable.
However, as the morning progresses, instability associated with
the aforementioned front will play a greater role, along with
pulses of positive vorticity advection. The modified 12z mfl
sounding showed CAPE around 1200 j/kg, a 500 mb temp of -14c, and
a freezing level slightly below 12,000 ft msl. Diurnal afternoon
heating, combined with cold air aloft, will steepen the lapse
rate. Strong updrafts may support isolated severe storms with hail
up to the size of quarters and gusty/erratic winds. This lines up
well with spcs marginal risk over our entire cwa. As the front
passes south into the florida straights this evening, convection
should begin to dwindle. A tight surface pressure gradient will
generate breezy east northeast winds tonight, mainly affecting the
east coast metro and adjacent atlantic coast beaches.
Prev discussion /issued 821 am edt Thu mar 23 2017/
a cold front dropping southward across the region through this
afternoon will bring increasing clouds with a chance of showers
and thunderstorms. Between 23/1500z-1800z, vcts conds may develop
with sct025 and bkn050, then expect decreasing convective
activity by late evening. Small hail and gusty/erratic winds will
be possible the storms as they move southward along the peninsula.
Behind the front, east northeast winds will increase to around
15-17 kt with occasional higher gusts. At kapf, ene winds will
be weaker, only around 12 kt. Breezy conditions should continue
through the night along the east coast TAF sites with vcsh.
Prev discussion... /issued 411 am edt Thu mar 23 2017/
today-tonight: weakening frontal boundary making it's way south and
west across central florida early this morning, generating a few
showers and storms, mainly across the waters. Analysis shows that
the deeper moisture associated with the boundary is lagging
behind slightly, and while the boundary and wind shift are likely
to arrive into south florida early morning, the deeper moisture
may lag more towards this afternoon.
Despite this, enough low-level moisture, along with weak
overrunning/isentropic lift will allow scattered showers to spread
from northeast to southwest across the region through the morning
hours. The best rain chances will be late morning into this
afternoon, when the deeper moisture and best lift combine.
Upper level vort maxes crossing the peninsula this morning have
brought in much colder temperatures aloft, with RUC analysis showing
500mb temps around -14 to -16c. With another vort MAX expected to
cool temps a degree or two, and daytime temperatures still expected
to climb into the upper 70s and low 80s, mid level lapse rates will
be quite steep today. This instability means that a few storms can't
be ruled out, especially along the east coast and lake okeechobee
region. It also sets up a favorable environment for a few strong
storms with hail, and SPC has placed most of south florida under a
marginal risk for today. Overall rainfall amounts are expected to
generally be light, but a few areas could see a nice soaking
rainfall of around a half an inch, helping the ongoing drought
Conditions to become breezy to windy late in the day as east-
northeast wind surge arrives behind the boundary, with the
strongest winds along the east coast. Overnight lows will be in
the around 60 over the interior and gulf coast and mid-upper 60s
for the east coast.
Friday: boundary moves south of the region and washes out as strong
high pressure builds to the north. The tight pressure gradient will
lead to an breezy to windy day, with wind gusts of 20-30 mph common|
at times. Lingering showers along the east coast will also
Highs on Friday behind the front will be slightly cooler, ranging
from the mid 70s to around 80. Low temperatures will generally be in
the 60s, with a few upper 50s readings in the interior.
Saturday-Wednesday: models have shifted westwards with the cut-off
low that had been forecast to meander well east of the bahamas. This
results in a weaker and shorter lived upper level ridge moving
across the fl peninsula on Saturday. The weaker ridge in turn allows
the next system moving across the tn/ms valley to dig a little
further south before the ridge rebuilds Monday and Tuesday.
Generally easterly flow will prevail through the period, remaining
breezy on Saturday before the surface gradient weakens Sunday and
Monday. Periodic showers are expected through the period off the
atlantic as easterly flow continues to bring in low level
moisture. Some enhancement in coverage is possible during the
weekend as vort maxes rotate through the region, and again on
Tuesday as another weak front approaches.
Temperatures will be near to slightly above normal for the long term
Marine... Boating conditions will begin deteriorating late this
morning over the atlantic waters, and into this evening over the
gulf as a weak frontal boundary moves across the region. The
boundary will also bring scattered to numerous showers, with the
potential for a few storms, especially over the local atlantic
Expect east-northeast winds 20-25kts over much of the local waters,
including biscayne bay, through the overnight hours with seas
building to 9-11ft in the gulf stream. Winds diminish into Friday,
but hazardous marine conditions for the atlantic waters are
expected to continue through Saturday. A small craft advisory is
currently in effect for the atlantic waters from midday, and the
gulf waters starting this evening.
Beach forecast... East-northeasterly wind surge arrives early this
afternoon with frontal boundary, leading to a rapid increase in the
rip current threat along all the atlantic beaches. There is a high
risk of rip currents for all the east coast beaches today and into
Fire weather... Light to moderate showers are expected to overspread
much of the region through the day with a frontal boundary, along
with a threat for isolated thunderstorms. A few showers may also
linger along the east coast into Friday, with relative humidity
values expected to remain above critical levels through Saturday.
Gusty east-northeast winds will also arrive with the boundary late
today, leading to very good to excellent dispersions across much of
the region into Saturday.
Preliminary point temps/pops
West palm beach 78 69 78 68 / 60 40 20 10
fort lauderdale 79 69 78 70 / 60 50 30 20
miami 81 68 79 69 / 50 40 40 20
naples 80 62 82 62 / 40 20 10 0
Fl... High rip current risk through Friday evening for flz168-172-173.
Am... Small craft advisory until 8 am edt Saturday for amz630-650-651-
Gm... Small craft advisory from 8 pm this evening to 11 am edt Friday
beach forecast... 88/alm
fire weather... 88/alm
Weather Reporting StationsEDIT (on/off)  Help NOTE: Click on distance to see the station location on a map
|Stations||Dist||Age||Wind||Air Temp||Water Temp||Waves||Pressure||DewPt|
|PVGF1 - Port Everglades Channel, FL||10 mi||31 min||NNE 5.1 G 11||76°F||1022.8 hPa||65°F|
|VAKF1 - 8723214 - Virginia Key, FL||15 mi||43 min||ENE 8 G 11||75°F||1023.2 hPa|
|FWYF1 - Fowey Rocks, FL||25 mi||73 min||N 2.9 G 4.1||72°F||75°F||1022.9 hPa (+1.9)|
|LKWF1 - 8722670 - Lake Worth, FL||46 mi||43 min||NNE 11 G 13|
Wind History for Virginia Key, FL(wind in knots) EDIT (on/off)  Help
Airport ReportsEDIT (on/off)  Help Click EDIT to display multiple airports
|Hollywood, North Perry Airport, FL||6 mi||20 min||E 8||10.00 mi||Partly Cloudy||82°F||64°F||55%||1023.1 hPa|
|Miami, Opa Locka Airport, FL||8 mi||20 min||E 9 G 16||10.00 mi||Partly Cloudy||82°F||63°F||53%||1022.8 hPa|
|Fort Lauderdale, Fort Lauderdale / Hollywood International Airport, FL||8 mi||20 min||ENE 12||10.00 mi||Partly Cloudy||81°F||64°F||58%||1022.4 hPa|
|Miami, Miami International Airport, FL||12 mi||20 min||E 13||10.00 mi||Partly Cloudy||85°F||63°F||48%||1022.7 hPa|
|Fort Lauderdale, Fort Lauderdale Executive Airport, FL||17 mi||20 min||ENE 11||10.00 mi||A Few Clouds||81°F||62°F||53%||1022.9 hPa|
|Pompano Beach, Pompano Beach Airpark, FL||21 mi||20 min||NNE 15 G 19||10.00 mi||Thunderstorm in Vicinity||81°F||64°F||58%||1023 hPa|
Wind History from HWO (wind in knots)
|1 day ago||E|
|2 days ago||NE|
EDIT RT Ports Option Weekend mode (on/off) (on/off)  Help One Week of Data
|Dumfoundling Bay |
Click for Map
Thu -- 01:07 AM EDT 0.21 feet Low Tide
Thu -- 04:09 AM EDT Moonrise
Thu -- 07:03 AM EDT 1.84 feet High Tide
Thu -- 07:20 AM EDT Sunrise
Thu -- 01:43 PM EDT 0.37 feet Low Tide
Thu -- 03:25 PM EDT Moonset
Thu -- 07:16 PM EDT 1.80 feet High Tide
Thu -- 07:33 PM EDT Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
EDIT (on/off)  Help One Week of Data
|Miami Harbor Entrance |
Click for Map
Thu -- 12:30 AM EDT 0.00 knots Slack
Thu -- 02:59 AM EDT 1.45 knots Max Flood
Thu -- 03:49 AM EDT 1.44 knots Min Flood
Thu -- 04:06 AM EDT 1.44 knots Max Flood
Thu -- 04:09 AM EDT Moonrise
Thu -- 06:55 AM EDT -0.00 knots Slack
Thu -- 07:21 AM EDT Sunrise
Thu -- 10:58 AM EDT -0.92 knots Max Ebb
Thu -- 01:03 PM EDT 0.00 knots Slack
Thu -- 03:25 PM EDT 1.34 knots Max Flood
Thu -- 03:25 PM EDT Moonset
Thu -- 07:09 PM EDT -0.00 knots Slack
Thu -- 07:33 PM EDT Sunset
Thu -- 11:05 PM EDT -1.05 knots Max Ebb
Tide / Current data from XTide NOT FOR NAVIGATION
Weather Map and Satellite Images(on/off)  Help
|Weather Map ||IR Satellite Image from GEOS|
GOES Local Image of Southeast EDIT
Wind Forecast for Miami-South Florida, FL (12,3,4,5)(on/off)  Help
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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.