Saturday, April21, 2018 L-36.com


Marine Weather and Tides
Feather Sound, 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 6:56AMSunset 7:59PM Saturday April 21, 2018 7:06 PM EDT (23:06 UTC) Moonrise 10:51AMMoonset 12:00AM Illumination 41% Phase: Waxing Crescent; Moon at 7 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- 301 Pm Edt Sat Apr 21 2018
Tonight..East winds around 10 knots. Bay and inland waters a light chop. A chance of showers and Thunderstorms in the evening.
Sunday..Southeast winds around 10 knots then becoming southwest late in the afternoon. Bay and inland waters a light chop. A slight chance of Thunderstorms in the afternoon.
Sunday night..Southwest winds around 5 knots then becoming southeast around 10 knots in the late evening and overnight. Bay and inland waters a light chop. A chance of showers and a slight chance of Thunderstorms in the evening.
Monday..South winds around 10 knots. Bay and inland waters a light chop. A chance of showers and a slight 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..South winds around 10 knots then becoming west in the afternoon. 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. A slight chance of showers in the evening.
Wednesday..West winds around 10 knots. Bay and inland waters a light chop.
Wednesday night..Northwest winds around 10 knots. Bay and inland waters a light chop.
Thursday..West winds around 10 knots. Bay and inland waters a light chop.
GMZ800 Synopsis For The Coastal Waters From Bonita Beach To Suwannee River- 301 Pm Edt Sat Apr 21 2018
Synopsis..East to southeasterly flow across the waters will turn onshore near the coast this afternoon and Sunday afternoon with the sea breeze and then turn back to east/southeast tonight. Some increase in wind speeds to exercise caution levels will be possible tonight, mainly for the northern waters. Winds will become more south to southwest Monday ahead of an approaching cold front, with increasing shower and Thunderstorm activity through early Tuesday. The front finally clears the region late Tuesday, with drier conditions and west to northwest winds behind it for mid week.

7 Day Forecast for Marine Location Near Feather Sound, FL
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location: 27.87, -82.55     debug


Area Discussion for - Tampa Bay, FL
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Fxus62 ktbw 211846
afdtbw
area forecast discussion
national weather service tampa bay ruskin fl
246 pm edt Sat apr 21 2018

Short term (tonight-Sunday)
A zonal to nearly ridged flow remains in place aloft this afternoon
with a decaying surface frontal boundary across the central florida
peninsula. High pressure continues to build over the eastern
seaboard, increasing the pressure gradient and boundary layer east
flow across the forecast area. This gradient is weakest across
southwest florida, where a weak sea breeze has been able to make it
over land. This is not the case farther north, where flow remains
out of the east. A few showers and thunderstorms have
popped up over the east coast and are making their way over
the interior and we can generally expect these to continue
shifting westward through the afternoon and evening. Some
coastal areas could get some showers, but again, this is
less likely over southwest florida where the sea breeze has
pushed away from the coast.

For tonight into Sunday, the large closed upper-level low will
continue shifting eastward toward the southeast with an associated
surface low and frontal boundary also approaching the area. This
boundary will remain well to our west through Sunday, but it will
allow our winds to become a bit more southerly. This will lead to a
further increase in moisture with a greater chance of showers and a
few thunderstorms through the day.

Mid long term (Sunday night - Saturday)
Deep layered trough and associated low pressure will move slowly
eastward northeastward toward the eastern seaboard through Tuesday.

Cyclonic flow aloft with multiple weak short-waves will help
energize a frontal boundary as it moves into the florida panhandle
Sunday night, then slowly southeast through the peninsula Monday and
Tuesday. We will see lots of clouds with periods of showers and
thunderstorms during this time. The highest rain chances on Monday
will be over the interior as winds turn southwesterly keeping any
sea breeze convergence over the eastern half of the state. Rain on
Tuesday will be triggered more by the deep layered trough moving
across the region. Highest rain chances on Tuesday will be from the
tampa bay area south, with a gradual drying trend from north to
south through the day.

A second cold front could bring some showers to the area beginning
on Thursday, but moisture return appears to be quite limited so
don't expect any significant rain from that system.

The forecast for Saturday, day seven, will depend on what happens to
energy dropping southward out of canada and into the great lakes on
Friday. The GFS keeps this system progressive moving it quickly
toward new england by Saturday. The ECMWF leaves behind a southern
stream short-wave that moves into the gulf of mexico by Saturday
morning, bringing showers back across the region. For now, will
introduce low rain chances, 20 to 30 percent, but may need to
increase these as time GOES on if the ECMWF solution gains support
from other global models.

Aviation
MainlyVFR conditions are expected through the rest of the day. Some
shower activity could briefly cause MVFR conditions through the rest
of the afternoon and evening, but there will be a greater chance for
tomorrow afternoon. There will also be a chance for MVFR CIGS for
the overnight period, similar to this morning and last night. Winds
will be out of the east to southeast through the first part of
tomorrow before turning onshore near the coast in the
afternoon.

Marine
East to southeasterly flow across the waters will turn onshore near
the coast this afternoon and Sunday afternoon with the sea breeze
and then turn back to east southeast tonight. Some increase in wind
speeds to exercise caution levels will be possible tonight, mainly
for the northern waters. Winds will become more south to southwest
Monday ahead of an approaching cold front, with increasing shower
and thunderstorm activity through early Tuesday. The front finally
clears the region late Tuesday, with drier conditions and west to
northwest winds behind it for mid week.

Fire weather
No fire weather hazards are expected through the next several days
as relative humidity values will remain above critical levels. Some
patchy ground fog is possible tonight, but no widespread fog is
anticipated.

Preliminary point temps pops
Tpa 70 81 71 82 40 40 20 50
fmy 70 86 71 86 20 40 20 50
gif 69 81 69 85 50 60 50 70
srq 70 78 70 83 20 30 10 40
bkv 67 82 68 82 50 50 30 50
spg 71 84 71 82 40 30 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... 63 jillson


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
OPTF1 - 8726607 - Old Port Tampa, FL 1 mi49 min W 1 G 4.1 83°F 76°F1017.8 hPa
MCYF1 7 mi49 min 77°F
TPAF1 - 8726694 - TPA Cruise Terminal 2, Tampa, FL 8 mi61 min NE 13 G 20
SAPF1 - 8726520 - St. Petersburg, FL 9 mi55 min W 6 G 8.9 83°F 78°F1017.2 hPa
CLBF1 12 mi73 min W 6 G 7 81°F 1016.9 hPa
MTBF1 15 mi49 min W 7 G 8 77°F 1017.7 hPa71°F
PMAF1 16 mi49 min 78°F 76°F1017.5 hPa
CWBF1 - 8726724 - Clearwater Beach, FL 17 mi55 min NW 8 G 9.9 76°F 75°F1018.3 hPa
FHPF1 - Fred Howard Park, FL 24 mi73 min NW 7 G 8 80°F 1018.6 hPa
42098 28 mi37 min 75°F1 ft

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., FL2 mi71 minSSE 610.00 miMostly Cloudy85°F65°F53%1017.9 hPa
Tampa, Peter O Knight Airport, FL6 mi72 minE 1110.00 miOvercast84°F64°F51%1017.9 hPa
Tampa, Tampa International Airport, FL7 mi74 minE 910.00 miPartly Cloudy87°F55°F35%1017.6 hPa
Albert Whitted Airport, FL8 mi74 minW 810.00 miFair83°F64°F55%1016.9 hPa
St. Petersburg/Clearwater Airport, FL8 mi74 minWNW 710.00 miPartly Cloudy86°F64°F49%1017.5 hPa
Tampa, Vandenberg Airport, FL14 mi72 minE 11 G 1510.00 miFair84°F66°F55%1018.3 hPa
Plant City, Plant City Municipal Airport, FL22 mi72 minENE 15 G 2010.00 miPartly Cloudy84°F66°F55%1019 hPa

Wind History from MCF (wind in knots)
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Last 24hrNW8NW6NW4NE10
G14
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G18
NE13NE11NE11NE9E11E10E9E11E9SE12
G16
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G17
SE7
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S8E10SE10S6
1 day agoNW4NW4CalmCalmCalmCalmCalmCalmCalmW3CalmNW3CalmCalmN6W5CalmSE3E4SW5S3W4W5W7
2 days agoN8N4N4N3CalmCalmCalmCalmCalmW3CalmCalmNW3SW3SW6SW5SW6
G15
SW10SW9
G16
SW11W6NW9W12NW6

Tide / Current Tables for Port Tampa, Old Tampa Bay, Florida
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Port Tampa
Click for Map
Sat -- 12:54 AM EDT     Moonset
Sat -- 01:51 AM EDT     -0.16 feet Low Tide
Sat -- 06:59 AM EDT     Sunrise
Sat -- 09:49 AM EDT     1.59 feet High Tide
Sat -- 11:51 AM EDT     Moonrise
Sat -- 11:56 AM EDT     1.54 feet Low Tide
Sat -- 06:26 PM EDT     2.73 feet High Tide
Sat -- 07:58 PM EDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.2-0.1-0.2-00.20.50.91.21.41.61.61.61.51.61.722.32.62.72.72.52.11.71.1

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 (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.