Wednesday, March29, 2017 L-36.com


Marine Weather and Tides
Rotonda, 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 7:19AMSunset 7:45PM Wednesday March 29, 2017 7:02 PM EDT (23:02 UTC) Moonrise 7:38AMMoonset 8:38PM Illumination 6% Phase: Waxing Crescent; Moon at 2 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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GMZ856 Coastal Waters From Bonita Beach To Englewood Fl Out 20 Nm- 246 Pm Edt Wed Mar 29 2017
Tonight..Northwest winds around 10 knots then becoming east around 5 knots after midnight. Seas 2 feet or less. Bay and inland waters a light chop.
Thursday..Southeast winds around 10 knots then becoming south in the afternoon. Seas 2 feet. Bay and inland waters a light chop.
Thursday night..South winds around 10 knots. Seas 2 feet. Bay and inland waters a light chop.
Friday..South winds around 10 knots. Seas 2 feet. Bay and inland waters a light chop. A slight chance of Thunderstorms.
Friday night..South winds around 10 knots then becoming southwest around 5 knots after midnight. Seas 2 feet. Bay and inland waters a light chop.
Saturday..Southeast winds around 5 knots then becoming southwest in the afternoon. Seas 2 feet or less. Bay and inland waters smooth.
Saturday night..Northwest winds around 5 knots then becoming north after midnight. Seas 2 feet or less. Bay and inland waters smooth.
Sunday..East winds around 5 knots then becoming south in the afternoon. Seas 2 feet. Bay and inland waters smooth.
Sunday night..Southeast winds around 10 knots. Seas 2 to 3 feet. Bay and inland waters a light chop.
Monday..South 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- 246 Pm Edt Wed Mar 29 2017
Synopsis.. High pressure will remain over the region through Thursday...with no marine hazards expected. Winds will become onshore with the sea breeze through this afternoon and into the evening. A more southerly flow will develop for Thursday ahead of an approaching cold front...which will bring shower and possibly some Thunderstorm activity for Friday. Winds Thursday night into Friday could increase close to cautionary criteria...otherwise no headlines are expected. Lighter winds and drier conditions return for the weekend as high pressure moves back over the area.

7 Day Forecast for Marine Location Near Rotonda, FL
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location: 26.74, -82.33     debug


Area Discussion for - Tampa Bay, FL
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Fxus62 ktbw 291843
afdtbw
area forecast discussion
national weather service tampa bay ruskin fl
243 pm edt Wed mar 29 2017

Short term (tonight-Thursday)
The overall set-up currently observed will remain in place through
tonight- ridging aloft with surface high pressure centered east of
the state. This will allow winds to become light and variable
overnight and we should again see some patchy ground fog toward
daybreak. Lows in the morning will be mild and above normal.

The first half of Thursday will start out similar to today. A closed
low will then move into the central part of the country by the end of
the day, suppressing the ridge a bit and generally lowering its
influence over florida. The surface ridge will also weaken a bit as
it pushes eastward ahead of an approaching cold front. Through the
end of the day, this will really only turn our winds more to the
south, although we should still have a sea breeze right near the
coast. Overall, there should be enough suppression from the ridge to
keep rainfall out of the forecast and temperatures will remain on the
warm side, just a bit cooler at the coast.

Long term (Thursday night-Wednesday)
Upper level ridging sits along the eastern seaboard as an upper low over
missouri and associated troughing moves eastward. A more zonal pattern
sets up by Friday afternoon and will persist through Sunday when ridging
sets up over the region. On the surface, high pressure off the mid-atlantic
coast ridges south, while an area of low pressure over missouri and associated
frontal boundary moves eastward. This front will bring a chance of showers
and slight chance of thunderstorms to the area on Friday. The front clears
the area by late Friday into Saturday as high pressure builds into the
area bringing clearing conditions through the weekend. Another frontal
system develops by Tuesday next week and will bring another chance of
rain showers to the area by Monday morning through Tuesday.

Aviation
Vfr conditions are expected through most of the forecast period. Some
patchy ground fog could affect terminals across southwest florida and
possible klal toward daybreak, withVFR then returning for the rest
of the day. Winds will become light and variable tonight and then
more southerly through Thursday.

Marine
High pressure will remain over the region through Thursday, with no
marine hazards expected. Winds will become onshore with the sea
breeze through this afternoon and into the evening. A more southerly
flow will develop for Thursday ahead of an approaching cold front,
which will bring shower and possibly some thunderstorm activity for
Friday. Winds Thursday night into Friday could increase close to
cautionary criteria, otherwise no headlines are expected. Lighter
winds and drier conditions return for the weekend as high pressure
moves back over the area.

Fire weather
Relative humidity values will fall near critical levels east of
around the i-75 corridor for Thursday afternoon, and may briefly
drop just below 35%, but long durations are not expected and light
winds will preclude red flag conditions. Low-level moisture will
increase for Friday, and relative humidity values are expected to
remain above 35%. Some patchy fog is possible toward daybreak
Thursday morning, but widespread dense fog is not expected.

Preliminary point temps/pops
Tpa 66 82 68 81 / 0 0 10 40
fmy 65 84 66 85 / 0 0 0 20
gif 64 88 65 85 / 0 0 10 30
srq 65 76 67 78 / 0 0 10 30
bkv 61 86 62 83 / 0 0 10 40
spg 67 80 68 80 / 0 0 10 40

Tbw watches/warnings/advisories
Fl... None.

Gulf waters... None.

Short term/aviation/marine/fire weather... 05/carlisle
mid term/long term/decision support... 74/wynn


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
VENF1 - Venice, FL 24 mi63 min W 7 G 8 74°F 75°F1015.4 hPa (-0.5)69°F
FMRF1 - 8725520 - Fort Myers, FL 25 mi45 min W 8 G 9.9 80°F 82°F1014.8 hPa
42013 - C10 - Navy-2 43 mi93 min W 7.8 G 9.7 69°F 72°F

Wind History for Naples, FL
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Punta Gorda, Charlotte County Airport, FL22 mi70 minWSW 1110.00 miFair80°F64°F58%1015.7 hPa
Venice Municipal Airport, FL24 mi68 minWSW 710.00 miFair75°F69°F83%1015.9 hPa

Wind History from PGD (wind in knots)
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Last 24hrNW8W4N5E3CalmN3NE4NE5NE5NE3CalmCalmCalmE3S5SW4--SW8SW12W13SW13W12W11W12
1 day agoW5SW3S5SE4CalmSE3SE3E4E4CalmCalmCalmCalmSE4SE4S5W75N9NW6--W13W9W13
2 days agoNW10N54E8SE8SE6SE4E3E3E3E4NE3NE4NE5NE7E8E7E8N7NE10NE12
G17
NE7NE7NE6

Tide / Current Tables for Port Boca Grande, Charlotte Harbor, Florida
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Port Boca Grande
Click for Map
Wed -- 02:32 AM EDT     1.32 feet High Tide
Wed -- 07:22 AM EDT     Sunrise
Wed -- 07:42 AM EDT     0.30 feet Low Tide
Wed -- 08:37 AM EDT     Moonrise
Wed -- 02:19 PM EDT     1.51 feet High Tide
Wed -- 07:44 PM EDT     Sunset
Wed -- 08:29 PM EDT     -0.14 feet Low Tide
Wed -- 09:37 PM EDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.91.21.31.31.10.90.60.40.30.40.60.91.21.41.51.51.20.90.50.1-0.1-0.100.3

Tide / Current Tables for Boca Grande Pass, Charlotte Harbor, Florida Current
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Boca Grande Pass
Click for Map
Wed -- 12:43 AM EDT     2.88 knots Max Flood
Wed -- 04:08 AM EDT     -0.00 knots Slack
Wed -- 06:56 AM EDT     -1.67 knots Max Ebb
Wed -- 07:22 AM EDT     Sunrise
Wed -- 08:37 AM EDT     Moonrise
Wed -- 09:32 AM EDT     0.00 knots Slack
Wed -- 12:41 PM EDT     2.75 knots Max Flood
Wed -- 03:40 PM EDT     -0.00 knots Slack
Wed -- 07:07 PM EDT     -2.76 knots Max Ebb
Wed -- 07:44 PM EDT     Sunset
Wed -- 09:37 PM EDT     Moonset
Wed -- 10:29 PM EDT     0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
2.72.82.31.30.1-0.8-1.5-1.7-1.4-0.60.51.72.62.72.10.9-0.4-1.6-2.4-2.8-2.6-1.8-0.70.7

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 Tampa Bay, FL (19,4,5,8)
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Ground Weather Radar Station Tampa Bay Area, 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.