Thursday, January23, 2020
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Marine Weather and Tides
Apollo 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 7:18AMSunset 6:04PM Thursday January 23, 2020 3:07 AM EST (08:07 UTC) Moonrise 6:25AMMoonset 5:03PM Illumination 4% Phase: Waning Crescent; Moon at 28 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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GMZ830 Tampa Bay Waters- 844 Pm Est Wed Jan 22 2020
Rest of tonight..Northeast winds around 15 knots diminishing to 5 to 10 knots after midnight. Bay and inland waters a moderate chop.
Thursday..Northeast winds around 10 knots. Bay and inland waters a light chop.
Thursday night..East winds around 5 knots. Bay and inland waters smooth.
Friday..South winds around 5 knots then becoming southwest in the afternoon. Bay and inland waters smooth. A slight chance of showers.
Friday night..West winds around 5 knots then becoming northwest around 10 knots after midnight. Bay and inland waters a light chop.
Saturday..North winds around 10 knots. Bay and inland waters a light chop.
Saturday night..North winds around 10 knots. Bay and inland waters a light chop.
Sunday..North winds around 5 knots. Bay and inland waters smooth.
Sunday night..North winds around 5 knots then becoming east around 10 knots after midnight. Bay and inland waters a light chop. A slight chance of showers in the evening, then a chance of showers after midnight.
Monday..Northeast winds around 10 knots then becoming north around 5 knots in the afternoon. Bay and inland waters a light chop. A chance of showers in the morning, then a slight chance of showers in the afternoon.
GMZ800 Synopsis For The Coastal Waters From Bonita Beach To Suwannee River- 844 Pm Est Wed Jan 22 2020
Synopsis.. High pressure ridges south-southwest along the eastern seaboard, over florida and into the gulf of mexico, continuing gusty northerly winds across the eastern gulf of mexico. Scec conditions likely to continue in gulf waters through tonight before decreasing on Thursday. The high pressure moves off the mid-atlantic coast by Thursday evening which will bring the winds around to the east and will remain below any sca or scec level to close out the week. Another cold front moves through the coastal waters on Friday producing a chance of showers. No other marine impacts expected.


7 Day Forecast for Marine Location Near Apollo Beach, FL
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location: 27.79, -82.52     debug


Area Discussion for - Tampa Bay, FL
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FXUS62 KTBW 230800 AFDTBW

Area Forecast Discussion National Weather Service Tampa Bay Ruskin FL 300 AM EST Thu Jan 23 2020

SHORT TERM (Today - Friday). Ample low level moisture moving in from the Atlantic within a low level northeast wind flow under a subsidence inversion is supporting considerable low clouds across the forecast area early this morning. These clouds should linger through mid morning before mixing out with skies becoming partly cloudy the remainder of the day. Temperatures will continue to moderate today with highs climbing into the lower to mid 70s during the afternoon.

Tonight into Friday high pressure along the eastern seaboard will shift east into the Atlantic as an upper level low and attendant surface low over the central U.S. moves east into the Ohio Valley. As the high moves eastward, northeast to east winds today will become southeast to south on Friday, then south to southwest Friday night ahead of the next cold front which will be approaching from the west. Increasing moisture ahead of the front will support increasing cloudiness tonight through Friday along with some isolated showers (Pops 20%) developing from the I-4 corridor north into the Nature Coast during Friday afternoon within the pre-frontal warm sector. Temperatures tonight into Friday will continue to moderate with lows tonight in the mid to upper 50s, with highs on Friday climbing into the mid an upper 70s.

LONG TERM (Friday night - Wednesday). Mid level ridging over the open Atlantic shifts east as a low above the Ohio Valley . with a surface reflection and a cold front arcing down into the eastern Gulf of Mexico . tracks northeastward The low reaches New England early Mon. having swept the cold front down the state to the Florida Keys by early Sat morning and trailing broad cyclonic flow aloft the eastern U.S.

During the first half of next week the cyclonic flow exits the nation while a ridge from northeast Mexico to the Canadian Prairies slides to the Atlantic coast. The front briefly lifts back into south FL Mon then shifts south Tue and Wed . in response to high pressure building into the Gulf of Mexico from the north that moves to the eastern seaboard.

The front will have limited moisture when it passes through Fri night with only a few showers possible. The weekend for the most part will be rain free with temperatures on the cool side of normal. Then Sun night into Mon a short wave trough sliding through the cyclonic flow to the north and the front lifting to south FL will provide enough moisture and lift for scattered showers. Dry and cooler air returns for Tue-Wed with coolish temperatures warming to around normal.

AVIATION. Ample low level moisture within a northeast to east wind flow will support prevailing MVFR/IFR cigs at the terminals through 15Z, with VFR returning thereafter. Northeast to east winds at 8 to 12 knots will prevail through the forecast period.

MARINE. Wind and seas will continue to slowly diminish and subside today as the gradient weakens across the area as low pressure over the western Atlantic moves further to the east with northeast to east winds in the 10 to 15 knot range and seas of 2 to 3 feet expected. High pressure will move into the Atlantic tonight as the next storm system moves from the central U.S. into the Ohio Valley. As the high shifts eastward northeast to east winds today will veer to the southeast and south on Friday, then become south to southwest Friday night ahead of the next cold front approaching from the west. Winds will shift to the northwest and north early on Saturday as the cold front moves south through the waters. High pressure building in over the northern Gulf in the wake of the front and a weak trough of low pressure sliding east across the southern Gulf will support north to northeast winds over the Gulf waters on Sunday and Monday. Wind and seas should remain below 15 knots and 5 feet through the period with no headlines expected.

FIRE WEATHER. Humidity values are forecast to remain above critical levels through the end of the week with no Red Flag conditions expected. A cold front will move through the area Friday night into early Saturday with some isolated showers along and ahead of it. In the wake of the front cooler and drier air will again move into the region Saturday night into Sunday. This drier air will support a few hours of humidity values below 35 percent across south-central interior zones Sunday afternoon. Despite the low humidity low ERC values combined with light winds will preclude Red Flag conditions.

Preliminary Point Temps/PoPs. TPA 74 60 75 55 / 0 10 20 10 FMY 76 59 77 59 / 0 10 10 10 GIF 75 58 78 54 / 10 10 20 10 SRQ 75 59 77 58 / 0 10 10 10 BKV 74 55 77 48 / 0 10 20 10 SPG 74 61 75 57 / 0 10 20 10

TBW WATCHES/WARNINGS/ADVISORIES. FL . None. Gulf waters . None.

SHORT TERM/AVIATION/MARINE/FIRE WEATHER . 57/McMichael LONG TERM/DECISION SUPPORT . 09/Rude


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
GCTF1 1 mi49 min 53°F 1019.4 hPa51°F
OPTF1 - 8726607 - Old Port Tampa, FL 5 mi61 min NNE 9.9 G 14 52°F 61°F1019.5 hPa
SAPF1 - 8726520 - St. Petersburg, FL 6 mi61 min NE 9.9 G 15 53°F 60°F1019.1 hPa
CLBF1 10 mi73 min NE 2.9 G 7 50°F 1018.6 hPa
MCYF1 10 mi49 min 65°F
MTBF1 10 mi49 min NE 17 G 20 54°F 1019.5 hPa50°F
PMAF1 11 mi49 min 51°F 56°F1019 hPa
TSHF1 - 8726667 - East Bay Causeway, FL 11 mi55 min NNE 9.9 G 14
CWBF1 - 8726724 - Clearwater Beach, FL 21 mi61 min NNE 9.9 G 13 52°F 61°F1019.7 hPa
42098 26 mi37 min 64°F3 ft
FHPF1 - Fred Howard Park, FL 29 mi73 min NE 11 G 15 52°F 1020.6 hPa

Wind History for Old Port Tampa, FL
(wind in knots)    EDIT      (on/off)   Help
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Macdill Air Force Base, Fl., FL5 mi2.2 hrsNE 610.00 miMostly Cloudy51°F46°F86%1019.9 hPa
Albert Whitted Airport, FL6 mi74 minNNE 1310.00 miMostly Cloudy54°F50°F87%1019.1 hPa
Tampa, Peter O Knight Airport, FL9 mi72 minNE 910.00 miOvercast54°F53°F100%1020 hPa
St. Petersburg/Clearwater Airport, FL12 mi74 minNNE 810.00 miOvercast54°F50°F87%1019.9 hPa
Tampa, Tampa International Airport, FL12 mi74 minNE 1610.00 miOvercast52°F46°F83%1020 hPa
Tampa, Vandenberg Airport, FL18 mi72 minN 010.00 miOvercast52°F50°F94%1020 hPa
Plant City, Plant City Municipal Airport, FL24 mi72 minNNE 610.00 miOvercast52°F51°F100%1020 hPa

Link to 5 minute data for KMCF

Wind History from MCF (wind in knots)
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1 day ago------NE5N6NE9N11
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2 days ago------------NE6--NE7NW6N7N6------------------------

Tide / Current Tables for Port Tampa, Old Tampa Bay, Florida
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Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.


Tide / Current Tables for Old Tampa Bay Entrance (Port Tampa), Florida Current
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Old Tampa Bay Entrance (Port Tampa)
Click for Map
Thu -- 12:50 AM EST     -0.00 knots Slack
Thu -- 06:23 AM EST     -1.51 knots Max Ebb
Thu -- 06:25 AM EST     Moonrise
Thu -- 07:20 AM EST     Sunrise
Thu -- 09:38 AM EST     0.00 knots Slack
Thu -- 12:39 PM EST     1.27 knots Max Flood
Thu -- 04:33 PM EST     -0.00 knots Slack
Thu -- 05:03 PM EST     Moonset
Thu -- 06:03 PM EST     Sunset
Thu -- 06:24 PM EST     -0.31 knots Max Ebb
Thu -- 08:04 PM EST     0.00 knots Slack
Thu -- 10:50 PM EST     0.79 knots Max Flood
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.3-0.1-0.5-0.8-1.1-1.3-1.5-1.5-1.1-0.50.30.91.21.310.60.2-0.1-0.3-0.3-00.40.70.8

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 Tampa Bay, FL (3,6,7,8)
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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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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.