Marine Weather and Tides
3/3/2018 - There is a new GOES Satellite for the east coast that required rewriting that part of the code. Please report any issues.
6/25/2017 - NOAA is having a major issue that impact the 7 day forecast load times. Many users are reporting problems. The issue has been reported.
5/23/2017 - Worked with NOAA again to speed up the 7 day forecast load times. Thanks to them for being responsive.
|Sunrise 7:31AM||Sunset 7:39PM||Sunday March 18, 2018 3:36 PM EDT (19:36 UTC)||Moonrise 7:27AM||Moonset 7:54PM||Illumination 4%|
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|GMZ856 Coastal Waters From Bonita Beach To Englewood Fl Out 20 Nm- 930 Am Edt Sun Mar 18 2018 |
This afternoon..Southeast winds around 5 knots then becoming north early in the afternoon, then becoming west late in the afternoon. Seas 2 feet or less. Bay and inland waters smooth.
Tonight..Southwest winds around 5 knots. Seas 2 feet or less. Bay and inland waters smooth.
Monday..Southwest winds around 10 knots. Seas 2 feet or less. Bay and inland waters a light chop.
Monday night..South winds around 10 knots. Seas 2 feet. Bay and inland waters a light chop.
Tuesday..Southwest winds 10 to 15 knots increasing to around 20 knots late in the afternoon. Seas 3 to 5 feet. Bay and inland waters choppy. A chance of showers and a slight chance of Thunderstorms.
Tuesday night..West winds around 20 knots diminishing to 10 to 15 knots after midnight, then becoming northwest around 20 knots toward morning. Seas 4 to 6 feet. Bay and inland waters choppy. A slight chance of Thunderstorms.
Wednesday..Northwest winds around 20 knots. Seas 5 to 7 feet. Bay and inland waters choppy. A slight chance of Thunderstorms in the morning.
Wednesday night..Northwest winds around 20 knots then becoming north 10 to 15 knots after midnight. Seas 5 to 7 feet. Bay and inland waters choppy.
Thursday..North winds around 15 knots. Seas 3 to 5 feet. Bay and inland waters a moderate chop.
|GMZ800 Synopsis For The Coastal Waters From Bonita Beach To Suwannee River- 930 Am Edt Sun Mar 18 2018 |
Synopsis..High pressure is sitting east of florida with perfect boating conditions today. Rain free conditions can be expected with light winds less than 10 knots and seas 1 feet or less. A slight uptick in the winds and seas can be expected beginning Monday afternoon into Tuesday as the next frontal boundary approaches the area. Rain and Thunderstorm chances will also increase into Tuesday as the front approaches. Boating conditions will deteriorate further late Tuesday into Wednesday in the wake of this front with small craft advisory conditions expected.
7 Day Forecast for Marine Location Near Captiva, FLHourly EDIT Help
Area Discussion for - Tampa Bay, FL  (on/off)  Help NOTE: mouseover dotted underlined text for definition
|Fxus62 ktbw 181839|
area forecast discussion
national weather service tampa bay ruskin fl
239 pm edt Sun mar 18 2018
Strong to severe storms possible late Monday into Tuesday...
Short term (today - Monday)
A closed upper low continues to spin over northern quebec with
troughing extending south through the western atlantic. A
predominant west-northwest to east-southeast zonal flow is over
florida with ridging extending through the central u.S into the
dakotas. Another closed upper low over the northwest u.S. And deep
troughing will move east through the period which will lend support
to our next significant weather system late Monday into Tuesday.
On the surface, high pressure over the eastern gulf of mexico will
produce pleasant weather conditions for the rest of today into early
Monday. The high shifts east over the bahamas by Monday afternoon as
the next weather system approaches the area from the northwest. Most
of the associated weather with this system will stay north of tampa
bay on Monday, before the actual cold front moves through on
Tuesday. That is when the highest chances of severe weather with
damaging winds, possible tornadoes and large hail will be possible.
More on this in the long term discussion. Temperatures will be
around seasonal for the next couple of days until the front passes
on Tuesday. In the wake of the front, temps will cool down several
degrees below average.
Long term (Monday night - Sunday)
Models remain in decent agreement with synoptic scale features
during the long term period so a blend will be used. At the start of
the period a short wave trough will be moving east toward the tn
valley while an attendant deepening surface low moves east across
the the tn valley and toward the mid atlantic coast with a trailing
cold front moving into the florida panhandle. Increasing moisture
and instability within the warm sector ahead of the front will
support increasing chances for showers and storms across the nature
coast and the adjacent gulf waters during Monday night, with
increasing wind fields and shear increasing the potential for a few
strong to severe storms, especially from citrus sumter counties
north to levy county where currently a marginal risk of severe
storms has been posted by the storm prediction center.
On Tuesday a stronger shortwave trough will move east across the
southeastern states and northern gulf coast. As this feature moves
eastward a broad area of surface low pressure will move east
northeast across ga sc during the day with this low then moving
offshore the mid atlantic coast Tuesday night. As the low moves east
northeastward the aforementioned cold front will get pulled
southeast through the eastern gulf waters and west central and
southwest florida. Ample moisture, instability, and increasing
ascent will support increasing chances (pops 70 to 8 percent) for
showers and thunderstorms along and ahead of the front which will
spread south into west central and southwest florida during the day.
Similar to yesterday model sounding data continues to indicate
increasing winds (in the 45-50 knot range in the 925-850mb level)
and increasing wind shear, steep mid level lapse rates, mucape
values in the 1500-2000 j kg range, and rapid cooling aloft (-13c at
500mb) overspreading the region on Tuesday which will increase the
potential for severe storms with damaging winds, large hail, and
perhaps a tornado or two the main hazards. The storm prediction
center has placed the nature coast into an enhanced risk of severe
storms on Tuesday with a marginal to slight risk of severe storms
across the remainder of region. Given this all residents and
visitors should continue to monitor the latest forecast and be ready
to take immediate action if warnings are issued.
The severe threat along with rain chances will end from north to
south Tuesday night as the short wave trough exits to the east into
the atlantic and the cold front moves to the south of the forecast
area. An increasing northwest to northerly wind flow in the wake of
the front will usher in much cooler and drier air Wednesday through
Friday as surface high pressure builds in from the west. The
increasing winds in the wake of the front will help to quickly
builds seas over the adjacent gulf waters with a period of very
hazardous marine and beach conditions developing Tuesday night
through early Thursday with frequent wind gusts to near gale force
possible along with high surf and a high risk of rip currents
developing along area beaches.
High pressure over the peninsula on Saturday will move slowly
southeast into the atlantic during the day as an area of low
pressure move offshore the mid atlantic coast. Pleasant dry weather
with lighter winds and warmer temperatures are expected. On Sunday a
back-door type cold front will approach from the northeast during
the day. Limited moisture will preclude rain chances with the front
with pleasant weather continuing with just some clouds and a wind
shift into the northeast expected during the afternoon.
Above normal temperatures on Tuesday will fall to below normal
Wednesday through Friday in the wake of the front under cold air
advection with overnight lows falling back into the 40s and 50s,
with daytime highs in the upper 60s to lower 70s. Temperatures will
moderate back to above normal during next weekend as winds become
The fog and low ceilings from this morning have cleared up giving
way toVFR conditions for the rest of the day with light onshore
winds. Similiar conditions can be expected again on Monday morning
with more vsby cig restrictions possible between 09-15z.
High pressure is sitting east of florida with perfect boating
conditions today. Rain free conditions can be expected with light
winds less than 10 knots and seas 2 feet or less. A slight uptick in
the winds and seas can be expected beginning Monday afternoon into
Tuesday as the next frontal boundary approaches the area. Rain
chances will also increase into Tuesday as the front approaches.
Boating conditions will deteriorate further late Tuesday into
Wednesday in the wake of this front with small craft advisory
Low level moisture continues to be on the rise and will remain above
critical levels today and Monday. Good rain chances Tuesday ahead of
a cold front. Very dry and cool high pressure to build into the
region Wednesday through the end of next week.
Preliminary point temps pops
Tpa 65 79 69 77 10 20 20 70
fmy 65 82 69 81 10 10 10 60
gif 62 85 68 82 10 30 10 70
srq 64 76 69 77 0 10 10 70
bkv 62 81 67 78 10 40 30 70
spg 65 79 69 77 10 20 20 70
Tbw watches warnings advisories
Gulf waters... None.
Short term aviation marine fire weather... 74 wynn
long term decision support... 57 mcmichael
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|
|FMRF1 - 8725520 - Fort Myers, FL||20 mi||49 min||W 5.1 G 8||78°F||74°F||1014 hPa|
|NPSF1 - 8725110 - Naples, FL||33 mi||49 min||72°F||1014.4 hPa|
|VENF1 - Venice, FL||41 mi||37 min||W 7 G 8||72°F||67°F||1014.8 hPa (-2.4)||64°F|
|RKXF1 - Rookery Bay Reserve, FL||41 mi||112 min||82°F||68°F|
Wind History for Naples, FL(wind in knots) EDIT (on/off)  Help
Airport ReportsEDIT (on/off)  Help Click EDIT to display multiple airports
|Fort Myers, Page Field, FL||18 mi||44 min||WNW 8||10.00 mi||Fair||85°F||57°F||40%||1014.3 hPa|
|Fort Myers, Southwest Florida International Airport, FL||23 mi||44 min||NNW 8||10.00 mi||Fair||83°F||60°F||46%||1014 hPa|
Wind History from FMY (wind in knots)
|1 day ago||W||SW||W||W||NW||NW||NW||NW||Calm||SE||Calm||Calm||SE||Calm||Calm||Calm||Calm||Calm||Calm||SW||SW||SW|
|2 days ago||W||W||W||NW||NW||N||N||N||N||N||NE||SE||E||Calm||E||Calm||E||S|
EDIT RT Ports Option Weekend mode (on/off) (on/off)  Help One Week of Data
|Captiva Island |
Click for Map
Sun -- 02:25 AM EDT 1.71 feet High Tide
Sun -- 07:34 AM EDT Sunrise
Sun -- 08:27 AM EDT Moonrise
Sun -- 09:11 AM EDT 0.12 feet Low Tide
Sun -- 02:44 PM EDT 1.62 feet High Tide
Sun -- 07:39 PM EDT Sunset
Sun -- 08:54 PM EDT Moonset
Sun -- 09:25 PM EDT 0.13 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
EDIT (on/off)  Help One Week of Data
|Point Ybel (0.4 Mi. NW of) |
Click for Map
Sun -- 03:00 AM EDT -0.00 knots Slack
Sun -- 06:50 AM EDT -1.05 knots Max Ebb
Sun -- 07:34 AM EDT Sunrise
Sun -- 08:26 AM EDT Moonrise
Sun -- 09:34 AM EDT 0.00 knots Slack
Sun -- 12:17 PM EDT 1.33 knots Max Flood
Sun -- 03:25 PM EDT -0.00 knots Slack
Sun -- 07:09 PM EDT -0.98 knots Max Ebb
Sun -- 07:38 PM EDT Sunset
Sun -- 08:53 PM EDT Moonset
Sun -- 09:53 PM EDT 0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Weather Map and Satellite Images(on/off)  HelpWeather Map
GOES 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.
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Other links: Northern Pacific Contential US Full GOES-East
Wind Forecast for Tampa Bay, FL (15,3,4,5)(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.