Saturday, April21, 2018 L-36.com


Marine Weather and Tides
Seminole, FL

Version 3.4
What's New / NOTES
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 6:58AMSunset 8:01PM Saturday April 21, 2018 5:44 AM EDT (09:44 UTC) Moonrise 10:52AMMoonset 12:00AM Illumination 35% Phase: Waxing Crescent; Moon at 6 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- 347 Am Edt Sat Apr 21 2018
Today..East winds around 15 knots then becoming southeast 5 to 10 knots in the afternoon. Bay and inland waters a moderate chop.
Tonight..East winds around 10 knots. Bay and inland waters a light chop. A chance of showers.
Sunday..East winds around 10 knots then becoming south in the afternoon. Bay and inland waters a light chop. A slight chance of Thunderstorms.
Sunday night..Southeast winds around 10 knots. Bay and inland waters a light chop. A chance of showers and a slight chance of Thunderstorms.
Monday..Southeast winds around 10 knots then becoming southwest in the afternoon. Bay and inland waters a light chop. A chance of Thunderstorms.
Monday night..South winds around 10 knots. Bay and inland waters a light chop. A chance of showers and a slight chance of Thunderstorms.
Tuesday..Southwest winds around 10 knots. Bay and inland waters a light chop. A chance of showers and a slight chance of Thunderstorms.
Tuesday night..West winds around 10 knots. Bay and inland waters a light chop.
Wednesday..West winds around 10 knots. Bay and inland waters a light chop.
GMZ800 Synopsis For The Coastal Waters From Bonita Beach To Suwannee River- 347 Am Edt Sat Apr 21 2018
Synopsis..A stationary frontal boundary across the central waters will gradually dissipate today. High pressure will build over the mid atlantic coast tightening the pressure gradient across the coastal waters with increasing easterly winds today and tonight...with advisory levels winds possible at times...mainly over the northern and central waters. A cold front will approach the waters Sunday night and Monday with an increasing chance of showers and Thunderstorms.

7 Day Forecast for Marine Location Near Seminole, FL
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location: 27.86, -82.78     debug


Area Discussion for - Tampa Bay, FL
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Fxus62 ktbw 210747
afdtbw
area forecast discussion
national weather service tampa bay ruskin fl
347 am edt Sat apr 21 2018

Short term (today-Sunday) relatively strong u l
southern stream flow across the southern tier of the conus
will persist through the weekend. A strong cut-off u l low
will push across the central southern plains today and
tonight... And the lower mississippi valley on Sunday.

At the surface, a stationary boundary across the central
florida peninsula will dissipate today. High pressure will
build along the mid atlantic coast with a tightening
gradient across the northern and central florida peninsula
today and tonight. Increasing convergent easterly boundary
layer flow off the atlantic today will aid in enhancing low
level moisture and weak instability with a few showers
possibly developing this afternoon, mainly over the
interior, below a gradually eroding subsidence inversion
around 060- 080 feet.

On Sunday, a cold front will push across the lower
mississippi valley and north central gulf of mexico.

Boundary layer winds will veer to the southeast across west
central and southwest florida with deep layer moisture and
instability gradually increasing across the region through
the afternoon hours. Scattered showers and possibly a few
thunderstorms will develop Sunday afternoon across the
forecast area.

Long term (Sunday night through next week)
As we enter the long range period, we will be in the midst
of a pattern change. A powerful upper low will meander
eastward toward the region. Strong surface ridging will
begin to lift northeastward, allowing south to southeast
flow to develop across the region. Surface and upper level
low pressure will be the primary weather makers for the
medium range, with more settled weather toward the latter
half of the long term period.

Showers and perhaps a few thunderstorms will likely be
ongoing Sunday night ahead of an approaching upper trough.

While thunderstorm activity may wane overnight, spotty
shower activity is likely to persist withing a strong warm
air advection regime. Given persistent southerly flow a
rather mild night is expected with lows near 70 degrees most
areas.

The most active period will occur Monday and Monday night
as the stacked low pressure system drifts eastward across
alabama and georgia. This will bring a weak pre frontal
trough across the peninsula. With the help of daytime
heating, abundant moisture, and subtle seabreeze
circulations, rather widespread shower and thunderstorm
coverage is expected, especially across the interior
peninsula. Showers and a few storms will likely move in off
the gulf in the morning hours with activity becoming more
widespread east of i-75 during the afternoon. A few stronger
storms may develop capable of mainly strong wind gusts and
torrential rainfall. Most of this activity will shift into
eastern florida by late afternoon, though a few showers may
linger.

The main trough and surface low will migrate northeastward
Tuesday into Wednesday, allowing a cold front to eventually
move through the area. Frontally induced showers and storms
can be expected Tuesday with drier conditions expected
Wednesday in the wake of the front. While the air will
certainly be drier behind the front, the airmass does not
look particularly cool. Therefore highs will generally
remain in the low to possibly mid 80s from mid week on.

Long range models depict another upper disturbance may move
across the area sometime late next week into next weekend
with low chances for showers. For now, will maintain a
mentionable chance of rain, though confidence on timing is
very low at this time.

Aviation
Areas of MVFR CIGS vcnty tpa pie lal srq early this
morning, otherwiseVFR conditions will prevail through the
day. LCL vfr CIGS vcnty all terminals this afternoon along
with the risk of a shower, with the best chance vcnty lal.

Marine
Elevated east winds will persist over the northern waters
through tonight with borderline SCA conditions likely.

Gradient will weaken on Sunday, but tighten a bit ahead of
cold front Sunday night and Monday with winds veering to the
south. A cold front will push across the waters Monday
night and Tuesday with winds veering to the northwest.

Fire weather
No fire weather hazards are expected today or Sunday as
relative humidity values are expected to remain above
critical levels.

Preliminary point temps pops
Tpa 83 71 82 70 30 30 40 30
fmy 88 70 87 70 10 10 30 30
gif 85 70 83 68 30 30 50 40
srq 85 70 81 69 10 0 20 30
bkv 83 65 83 66 30 20 40 40
spg 85 72 85 71 30 20 30 30

Tbw watches warnings advisories
Fl... None.

Gulf waters... None.

Short term aviation marine fire weather... 13 oglesby
mid term long term decision support... 84 austin


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
CWBF1 - 8726724 - Clearwater Beach, FL 9 mi44 min ENE 8.9 G 11 67°F 75°F1019.3 hPa (-1.4)
CLBF1 10 mi110 min ENE 4.1 G 8 71°F 1018.6 hPa
SAPF1 - 8726520 - St. Petersburg, FL 11 mi50 min NE 13 G 16 69°F 75°F1018.5 hPa
OPTF1 - 8726607 - Old Port Tampa, FL 12 mi44 min ENE 6 G 9.9 67°F 75°F1019.1 hPa (-1.3)
MTBF1 17 mi44 min ENE 14 G 17 68°F 1019 hPa (-1.1)64°F
TPAF1 - 8726694 - TPA Cruise Terminal 2, Tampa, FL 19 mi56 min NNE 6 G 8.9
PMAF1 19 mi44 min 67°F 77°F1018.8 hPa (-1.1)
MCYF1 19 mi44 min 77°F
FHPF1 - Fred Howard Park, FL 20 mi110 min ENE 12 G 16 66°F 1020.2 hPa
42098 20 mi44 min 74°F3 ft

Wind History for Clearwater Beach, FL
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
St. Petersburg/Clearwater Airport, FL6 mi51 minENE 106.00 miFog/Mist68°F64°F90%1019.1 hPa
Albert Whitted Airport, FL10 mi51 minENE 158.00 miOvercast70°F66°F90%1018.7 hPa
Macdill Air Force Base, Fl., FL14 mi1.8 hrsNE 1110.00 miFair67°F62°F87%1019.6 hPa
Tampa, Tampa International Airport, FL15 mi51 minNE 78.00 miOvercast67°F62°F84%1019.3 hPa
Tampa, Peter O Knight Airport, FL18 mi49 minENE 10 G 177.00 miPartly Cloudy66°F66°F100%1019.3 hPa

Wind History from PIE (wind in knots)
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Last 24hrNW3CalmCalmCalmNE4NE6NE6NE54CalmNW85W6W9NW8NW7N7NE13
G21
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G18
NE12NE10NE9E10
1 day agoS3CalmS5S6W6W9SW10W12NW9W12NW11NW11NW11NW9NW5W4W3W3CalmW3W3CalmW4Calm
2 days ago--CalmSE4E43NE6CalmW3NE7NE6N5W10NW9NW9NW7NW5N4N3CalmCalmS4CalmS4Calm

Tide / Current Tables for Indian Rocks Beach (inside), Florida
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Indian Rocks Beach (inside)
Click for Map
Sat -- 12:55 AM EDT     Moonset
Sat -- 06:18 AM EDT     1.77 feet High Tide
Sat -- 07:00 AM EDT     Sunrise
Sat -- 11:25 AM EDT     1.03 feet Low Tide
Sat -- 11:52 AM EDT     Moonrise
Sat -- 05:02 PM EDT     2.40 feet High Tide
Sat -- 07:59 PM EDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
-0.200.40.91.31.61.81.71.61.41.211.11.31.622.32.42.321.61.10.70.3

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
Sat -- 12:54 AM EDT     Moonset
Sat -- 03:17 AM EDT     0.00 knots Slack
Sat -- 06:27 AM EDT     1.00 knots Max Flood
Sat -- 06:59 AM EDT     Sunrise
Sat -- 10:30 AM EDT     -0.00 knots Slack
Sat -- 11:51 AM EDT     Moonrise
Sat -- 11:53 AM EDT     -0.18 knots Max Ebb
Sat -- 01:23 PM EDT     0.00 knots Slack
Sat -- 04:40 PM EDT     0.78 knots Max Flood
Sat -- 07:10 PM EDT     -0.00 knots Slack
Sat -- 07:58 PM EDT     Sunset
Sat -- 11:31 PM EDT     -1.22 knots Max Ebb
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
-1.2-1-0.6-0.20.40.8110.80.50.1-0.1-0.2-0.10.20.50.70.80.50.1-0.4-0.8-1.1-1.2

Weather Map and Satellite Images
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wmap_A
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.
target = "new">Link to Loop

Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for Tampa Bay, FL (5,6,7,8)
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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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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.