Sunday, April23, 2017 L-36.com


Marine Weather and Tides
Madeira Beach, 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 6:56AMSunset 8:02PM Sunday April 23, 2017 3:52 PM EDT (19:52 UTC) Moonrise 4:06AMMoonset 4:12PM Illumination 6% Phase: Waning Crescent; Moon at 27 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- 256 Pm Edt Sun Apr 23 2017
Tonight..West winds around 10 knots. Bay and inland waters a light chop.
Monday..West winds 5 to 10 knots increasing to around 15 knots in the late morning and afternoon. Bay and inland waters a moderate chop. A slight chance of showers in the morning.
Monday night..West winds around 15 knots diminishing to 5 to 10 knots after midnight. Bay and inland waters a moderate chop.
Tuesday..West winds around 10 knots. Bay and inland waters a light chop.
Tuesday night..West winds around 10 knots then becoming southwest around 5 knots toward morning. Bay and inland waters a light chop.
Wednesday..Southwest winds around 10 knots. Bay and inland waters a light chop.
Wednesday night..South winds around 10 knots. Bay and inland waters a light chop.
Thursday..South winds around 10 knots. Bay and inland waters a light chop.
Thursday night..Southwest winds around 10 knots then becoming southeast around 5 knots after midnight. Bay and inland waters a light chop.
Friday..South winds around 10 knots. Bay and inland waters a light chop.
GMZ800 Synopsis For The Coastal Waters From Bonita Beach To Suwannee River- 256 Pm Edt Sun Apr 23 2017
Synopsis..A trough of low pressure exits southern florida waters for the atlantic tonight as a cold front moves into the eastern gulf of mexico. The front crosses florida during Monday and exits to the atlantic Monday night. A chance of showers with a few Thunderstorms will be possible through Monday. Winds may briefly increase late Monday to near cautionary levels. High pressure builds in Tuesday and continues through the week...with an axis that meanders across central and northern florida.

7 Day Forecast for Marine Location Near Madeira Beach, FL
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location: 27.79, -82.78     debug


Area Discussion for - Tampa Bay, FL
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Fxus62 ktbw 231858
afdtbw
area forecast discussion
national weather service tampa bay ruskin fl
258 pm edt Sun apr 23 2017

Short term (rest of today-Monday)
An upper low near the south-central mississippi valley this
afternoon tracks southeast to the ga/sc border. A short
wave trough over southern fl lifts northeastward and is
absorbed into troughing from the upper low. At the surface a
low in northern ga trails a cold front south across the fl
panhandle then southwestward over the gulf of mexico. The
surface low move to the carolina coastal waters by late mon
afternoon with the front sweeping into the east gulf tonight
then across the state mon. In response to the front and the
upper level short wave trough... A surface trough over the
straits from western cuba to the northern bahamas lifts
northeast and merges in the carolina surface low.

The deepest moisture... Model pwat values at 2 inches or more...

which resulted in some record rainfall in the south has shifted
away. However enough residual moisture... Pwat in the 1.5 to 2 inch
range... And instability remain which along with sea breeze
convergence and limited day time heating to support a chance of
showers and a slight chance of thunderstorms through the rest of the
afternoon. There should be a break in rainfall from late afternoon
or early evening through the later night hours. But expect some
cloudiness along with patchy late night fog... Especially in areas
that received rain. Slightly deeper moisture returns with the front
but limited with pwat in the 1 to 1.5 inch range... Enough for
scattered showers or a few thunderstorms. The front and associated
weather begin to impact... The nature coast in the pre-dawn
hours... The tampa bay area around sunrise... Southwest florida around
mid-afternoon... Then exits by late afternoon. Winds will pick
noticeable with the front but will mainly be of concern for
aviation/marine interests.

Mid term/long term (Monday night-Sunday)
Monday night into Wednesday the mid/upper level shortwave trough
will continue to move up along the eastern seaboard away from the
region followed by ridging gradually build over florida as a
deepening trough sets up over the western half of the CONUS late in
the week through the weekend. At the surface weak high pressure will
be over the area for Monday night through Thursday, then late in the
week into the weekend a stronger high pressure will build in from
well out in the atlantic ocean. For Monday night into Tuesday night
a low level west to northwest flow will be in place bringing some
cooler and drier air into the region under fair skies. During
Wednesday and Thursday the flow will shift to south to southwest
with limited moisture continuing across the region so expecting
mostly clear to partly cloudy skies with rain chances less than 10
percent. For Friday through Sunday the low level flow will shift to
southeasterly with moisture gradually increasing leading to some
additional clouds. There will be a slim chance, less than 20 percent,
for a light shower/sprinkle Friday, then over the weekend some more
moisture could move into the region leading to a few showers, but
will keep rain chances at around 20 percent at this time as moisture
does not look that deep. Temperatures will be close to normal for
Monday night and Tuesday then as the ridging builds aloft we'll see
a gradually warm up a couple of degrees each day reaching the mid
80s coast to the lower 90s inland for Friday through Sunday.

Aviation
23/18z-24/18z. Bkn mid deck spreads north this afternoon as all
terminals swing to westerly winds. Isold tsra expected around 20z-
24z. GenerallyVFR over night with sct-bkn clouds... Possible MVFR
cigs tpa and pie... And lal and pgd could see some limited late night
br. Front arrives at the northern terminals around sunrise with
vcsh... Aft 18z at southern terminals. Westerly winds begin to pick
up toward the end of the period.

Marine
A trough of low pressure moves beyond the waters tonight as a cold
front slides into the east gulf... Then across the state mon. High
pressure builds back in Tue and continues for most of the week...

with an axis meandering around central/north fl.

The main concerns may be a few thunderstorms this afternoon but
expect these to mainly be onshore. The front tonight-mon will come
through with showers although can not rule out a thunderstorm or
two. Winds increase in the wake of the front... Up into the exercise
caution range Mon afternoon-night.

Fire weather
Recent heavy rainfall... Especially in the south... Along with more
limited rain as a cold front moves through late tonight and during
mon will provide enough moisture to preclude any low rh concerns for
the next few days.

Preliminary point temps/pops
Tpa 70 77 65 80 / 20 10 0 0
fmy 69 80 65 82 / 10 20 0 0
gif 67 79 60 83 / 30 10 0 0
srq 70 76 64 80 / 30 20 0 0
bkv 66 76 56 81 / 30 20 0 0
spg 70 76 65 79 / 20 10 0 0

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

Gulf waters... None.

Short term/aviation/marine/fire weather... 09/rude
mid term/long term/decision support... 69/close


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
CLBF1 6 mi119 min WSW 8 G 8.9 79°F 1009.1 hPa
SAPF1 - 8726520 - St. Petersburg, FL 8 mi53 min ESE 1.9 G 2.9 85°F 79°F1008.9 hPa (-1.9)
OPTF1 - 8726607 - Old Port Tampa, FL 13 mi53 min W 5.1 G 6 80°F 78°F1009.2 hPa (-2.1)
MTBF1 13 mi53 min WNW 8 G 8.9 78°F 1009.5 hPa (-2.0)69°F
CWBF1 - 8726724 - Clearwater Beach, FL 13 mi53 min WNW 9.9 G 13 76°F 79°F1009.8 hPa (-1.9)
42098 16 mi53 min 78°F1 ft
PMAF1 16 mi53 min 78°F 80°F1008.4 hPa (-2.0)
TPAF1 - 8726694 - TPA Cruise Terminal 2, Tampa, FL 21 mi65 min ESE 2.9 G 5.1
TSHF1 - 8726667 - East Bay Causeway, FL 21 mi59 min SSE 1.9 G 4.1
MCYF1 21 mi53 min 79°F
FHPF1 - Fred Howard Park, FL 25 mi119 min NW 9.9 G 12 80°F 1011.3 hPa
42013 - C10 - Navy-2 43 mi83 min NE 1.9 G 3.9 71°F 76°F
ARPF1 - APK - Aripeka, FL 45 mi119 min NW 11 G 13 78°F 1010.3 hPa

Wind History for St. Petersburg, FL
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
St. Petersburg Whitted Airport, FL8 mi60 minN 010.00 miFair85°F64°F51%1008.7 hPa
St. Petersburg/Clearwater Airport, FL10 mi60 minNE 610.00 miOvercast84°F64°F51%1009.3 hPa
Macdill Air Force Base, Fl., FL15 mi55 minE 410.00 miA Few Clouds89°F65°F47%1009.1 hPa
Tampa, Tampa International Airport, FL18 mi60 minWSW 910.00 miMostly Cloudy87°F66°F50%1009.2 hPa
Tampa, Peter O Knight Airport, FL20 mi58 minSSW 610.00 miFair90°F66°F46%1009.1 hPa

Wind History from SPG (wind in knots)
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Last 24hrS8SW5S7S5S4CalmCalmW3SW3CalmCalmCalmN3NE3N4N6E10NE7NE4E4E4CalmCalmCalm
1 day agoW9W9NW10NW9
G16
NW8NW5NW4N4N3N3E3SE8S9SE11SE12SE11SE11SE7SE10SE3E4E4S8S14
2 days agoE7E7E9E5N7N9SE10SE16SE13SE18SE17SE13E10E12SE12SE12SE12SE11SE12SE10SE9E6NE6E6

Tide / Current Tables for Johns Pass, Boca Ciega Bay, Florida
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Johns Pass
Click for Map
Sun -- 04:37 AM EDT     0.21 feet Low Tide
Sun -- 05:05 AM EDT     Moonrise
Sun -- 06:58 AM EDT     Sunrise
Sun -- 10:51 AM EDT     1.81 feet High Tide
Sun -- 05:02 PM EDT     0.54 feet Low Tide
Sun -- 05:12 PM EDT     Moonset
Sun -- 08:00 PM EDT     Sunset
Sun -- 10:54 PM EDT     1.83 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
1.51.20.80.40.20.20.40.71.11.51.71.81.71.51.20.90.60.50.60.91.21.51.81.8

Tide / Current Tables for Tampa Bay Entrance (Egmont Channel), Florida Current
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Tampa Bay Entrance (Egmont Channel)
Click for Map
Sun -- 12:38 AM EDT     -0.00 knots Slack
Sun -- 03:41 AM EDT     -1.36 knots Max Ebb
Sun -- 05:05 AM EDT     Moonrise
Sun -- 06:58 AM EDT     Sunrise
Sun -- 07:09 AM EDT     0.00 knots Slack
Sun -- 10:32 AM EDT     1.57 knots Max Flood
Sun -- 01:32 PM EDT     -0.00 knots Slack
Sun -- 04:21 PM EDT     -1.26 knots Max Ebb
Sun -- 05:12 PM EDT     Moonset
Sun -- 07:39 PM EDT     0.00 knots Slack
Sun -- 08:00 PM EDT     Sunset
Sun -- 10:50 PM EDT     1.43 knots Max Flood
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.4-0.3-0.9-1.3-1.3-1.1-0.7-0.10.51.11.51.51.10.4-0.3-1-1.2-1.2-0.9-0.40.20.81.31.4

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 (15,3,4,5)
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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.