Sunday, December15, 2019
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Marine Weather and Tides
Longboat Key, FL

Version 3.4
NOTICE
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.
6/2/2019. Many thanks to a user for reporting an error on one of the Edit pages. The switch to PHP 7.2 caused many pages that previously worked to quit working. I fixed many but I still depend on users to report ones I missed. Please report errors HERE or send an email to me at L-36.com. Allen

Sunrise 7:11AMSunset 5:39PM Sunday December 15, 2019 6:28 AM EST (11:28 UTC) Moonrise 9:16PMMoonset 10:18AM Illumination 86% Phase: Waning Gibbous; Moon at 18 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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GMZ853 Coastal Waters From Englewood To Tarpon Springs Fl Out 20 Nm- 336 Am Est Sun Dec 15 2019
Today..East winds around 10 knots. Seas 2 to 3 feet. Bay and inland waters a light chop.
Tonight..East winds 5 to 10 knots then becoming southeast around 15 knots in the late evening and overnight. Seas 2 to 3 feet. Bay and inland waters a moderate chop.
Monday..Southeast winds around 15 knots then becoming south 5 to 10 knots in the afternoon. Seas 2 feet. Bay and inland waters a moderate chop.
Monday night..Southeast winds around 10 knots. Seas 2 feet. Bay and inland waters a light chop. A chance of showers toward morning.
Tuesday..South winds around 10 knots then becoming west late in the afternoon. Seas 2 feet. Bay and inland waters a light chop. A chance of showers early in the morning, then showers likely in the late morning and afternoon.
Tuesday night..Northwest winds 5 to 10 knots then becoming north 10 to 15 knots late in the evening, then increasing to around 20 knots after midnight increasing to 20 to 25 knots toward morning. Seas 3 to 5 feet. Bay and inland waters rough. Showers likely in the evening, then a chance of showers after midnight.
Wednesday..North winds 20 to 25 knots. Seas 4 to 6 feet. Bay and inland waters rough. A slight chance of showers in the morning.
Wednesday night..Northeast winds 20 to 25 knots. Seas 4 to 6 feet. Bay and inland waters rough.
Thursday..Northeast winds around 20 knots. Seas 3 to 5 feet. Bay and inland waters choppy.
GMZ800 Synopsis For The Coastal Waters From Bonita Beach To Suwannee River- 336 Am Est Sun Dec 15 2019
Synopsis.. High pressure across north florida today moves out over the atlantic tonight and continues east while ridging back to the gulf of mexico until Tuesday. Then a cold front with some showers swings across the east gulf and over the state Wednesday...ushering in robust winds. High pressure builds in behind the front with slowly diminishing and veering winds.


7 Day Forecast for Marine Location Near Longboat Key, FL
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location: 27.38, -82.63     debug


Area Discussion for - Tampa Bay, FL
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FXUS62 KTBW 150800 AFDTBW

Area Forecast Discussion National Weather Service Tampa Bay Ruskin FL 300 AM EST Sun Dec 15 2019

DISCUSSION. Mid level ridging builds in across much of the Gulf region through tonight then eases east Mon as a trough slides into the Mississippi Valley from the west by Mon night. At the surface - a cold front south of the Florida Keys dissipates today as high pressure centered along the GA/FL moves east across the Atlantic tonight and Mon while stretching back to the central Gulf of Mexico.

A dry and stable airmass prevails for the next couple of days with sunny skies. However light winds and residual low level moisture are allowing some patchy fog to form this morning that will lift and mix out by 8 or 9 am. Cool Temperatures this morning gradually warm to above by Mon. While winds and waves on the Gulf are diminishing they will still support a high risk of rip currents through midday.

For Tue-Sat: The mid level trough noted above slides across the eastern U.S. and swings a cold front across FL Tue and early Wed with showers and cloudy skies. Deep layer ridging builds into the Gulf region late Wed-Thu and shifts east to FL Fri with a dry and stable air mass. A deep low with a cold front stretching south moves into the lower Mississippi Valley and central Gulf of Mexico Fri then tracks to the southeast U.S. coast and FL Sat. These features provide increasing moisture across the area with a chance of showers and thunderstorms for Sat. Temperatures initially run above normal then drop significantly after the front passes midweek. They slowly warm through Sat. Model discrepancy introduces some uncertainty in the end of the forecast . the GFS is a tad faster and more robust than the ECMWF.

AVIATION. 15/06Z SKC prevails but with some limited BR. especially LAL and PGD which will see some MVFR to IFR BR and ST TIL 13Z. FEW CU/SC drift in toward the end of the period. Light and VRBL winds become E and SE during the day AOB 9kt.

MARINE. Light to gentle easterly winds gradually veer as high pressure moves away and a front with some showers approaches Tue. Winds become northerly at 20 to 25 knots as the front crosses the waters and high pressure settles.

FIRE WEATHER. Slightly drier air works in today but then gradually moistens through early in the week with minimum RH values staying above critical levels. The next cold front ushers in drier air but also some cooler temperatures . keeping the RH out of critical ranges.

Preliminary Point Temps/PoPs. TPA 76 63 81 66 / 0 0 0 10 FMY 80 64 85 68 / 0 0 0 0 GIF 76 60 83 66 / 0 0 0 0 SRQ 77 62 83 66 / 0 0 0 10 BKV 77 57 83 62 / 0 0 0 10 SPG 75 65 79 67 / 0 0 0 10

TBW WATCHES/WARNINGS/ADVISORIES. FL . High Rip Current Risk until noon EST today for Coastal Charlotte- Coastal Hillsborough-Coastal Lee-Coastal Manatee-Coastal Sarasota-Pinellas.

Gulf waters . None.

DISCUSSION/AVIATION/MARINE/FIRE WEATHER . 09/Rude DECISION SUPPORT . 42/Norman


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
PMAF1 18 mi59 min 55°F 69°F1018.2 hPa
MTBF1 20 mi59 min NE 8.9 G 9.9 64°F 1018.4 hPa55°F
42098 22 mi59 min 70°F3 ft
VENF1 - Venice, FL 23 mi29 min ESE 5.1 G 6 56°F 70°F1018.5 hPa (+1.5)56°F
CLBF1 25 mi95 min ENE 1 G 1.9 56°F 1017.1 hPa
SAPF1 - 8726520 - St. Petersburg, FL 26 mi59 min Calm G 1 60°F 70°F1018.3 hPa
GCTF1 28 mi59 min 62°F 1018.3 hPa56°F
OPTF1 - 8726607 - Old Port Tampa, FL 33 mi59 min ENE 4.1 G 5.1 60°F 69°F1018.5 hPa
MCYF1 38 mi59 min 70°F
TSHF1 - 8726667 - East Bay Causeway, FL 39 mi65 min NNE 1.9 G 2.9
TPAF1 - 8726694 - TPA Cruise Terminal 2, Tampa, FL 40 mi59 min N 4.1 G 6
CWBF1 - 8726724 - Clearwater Beach, FL 43 mi65 min NE 5.1 G 6 60°F 70°F1018.2 hPa

Wind History for C-Cut, FL
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Sarasota / Bradenton, Sarasota-Bradenton International Airport, FL4 mi36 minE 57.00 miFair53°F52°F96%1017.6 hPa
Venice Municipal Airport, FL24 mi34 minE 34.00 miFog/Mist54°F53°F100%1018.6 hPa

Link to 5 minute data for KSRQ

Wind History from SRQ (wind in knots)
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Last 24hrW9W9CalmNW7NW12W10W13NW15
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NW12NW8NW8N5N3N3N4N3NE3NE3CalmCalmCalmCalmE5
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Tide / Current Tables for Sarasota, Sarasota Bay, Florida (2)
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Sarasota
Click for Map
Sun -- 12:48 AM EST     2.20 feet High Tide
Sun -- 07:12 AM EST     Sunrise
Sun -- 09:44 AM EST     -0.53 feet Low Tide
Sun -- 10:17 AM EST     Moonset
Sun -- 04:33 PM EST     1.23 feet High Tide
Sun -- 05:38 PM EST     Sunset
Sun -- 08:18 PM EST     1.10 feet Low Tide
Sun -- 09:15 PM EST     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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2.12.22.11.81.510.60.1-0.2-0.5-0.5-0.300.40.81.11.21.21.21.11.11.11.31.6

Tide / Current Tables for Tampa Bay Entrance (Egmont Channel), Florida Current
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Tampa Bay Entrance (Egmont Channel)
Click for Map
Sun -- 12:12 AM EST     1.10 knots Max Flood
Sun -- 02:56 AM EST     -0.00 knots Slack
Sun -- 06:52 AM EST     -2.29 knots Max Ebb
Sun -- 07:13 AM EST     Sunrise
Sun -- 10:19 AM EST     Moonset
Sun -- 11:09 AM EST     0.00 knots Slack
Sun -- 02:40 PM EST     1.68 knots Max Flood
Sun -- 05:38 PM EST     Sunset
Sun -- 07:21 PM EST     -0.00 knots Slack
Sun -- 08:04 PM EST     -0.06 knots Max Ebb
Sun -- 08:49 PM EST     0.00 knots Slack
Sun -- 09:15 PM EST     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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1.110.6-0-0.9-1.6-2.1-2.3-2.1-1.6-0.9-0.10.61.21.61.71.40.90.40.1-0.100.30.6

Weather Map
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wmap_A
GEOS Local Image of    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 (6,6,7,8)
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Ground Weather Radar Station Tampa Bay Area, FL
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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 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.