Saturday, August17, 2019 L-36.com


Marine Weather and Tides
Madeira Beach, FL

Version 3.4
NOTICE
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 7:01AMSunset 8:09PM Saturday August 17, 2019 6:32 PM EDT (22:32 UTC) Moonrise 8:43PMMoonset 7:44AM Illumination 95% Phase: Waning Gibbous; Moon at 17 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- 337 Pm Edt Sat Aug 17 2019
Tonight..South winds around 10 knots. Bay and inland waters a light chop. Scattered Thunderstorms until early morning, then isolated Thunderstorms toward morning.
Sunday..South winds around 10 knots then becoming southwest in the afternoon. Bay and inland waters a light chop. Scattered Thunderstorms early in the morning, then isolated Thunderstorms late in the morning. Scattered Thunderstorms in the afternoon.
Sunday night..West winds around 10 knots then becoming southeast around 5 knots in the late evening and overnight. Bay and inland waters a light chop. Isolated Thunderstorms late in the evening.
Monday..East winds around 5 knots then becoming southeast late in the morning, then then becoming west early in the afternoon then becoming northwest late in the afternoon. Bay and inland waters smooth. Isolated Thunderstorms in the morning, then scattered Thunderstorms in the afternoon.
Monday night..Northeast winds around 10 knots then becoming east in the late evening and overnight. Bay and inland waters a light chop. Scattered Thunderstorms in the evening.
Tuesday..East winds around 10 knots. Bay and inland waters a light chop. Numerous showers and scattered Thunderstorms in the afternoon.
Tuesday night..Southeast winds around 10 knots. Bay and inland waters a light chop. Scattered Thunderstorms in the evening, then isolated Thunderstorms after midnight.
Wednesday..Southeast winds around 10 knots. Bay and inland waters a light chop. Scattered Thunderstorms. Numerous showers in the afternoon.
Wednesday night..Southeast winds around 10 knots. Bay and inland waters a light chop. Scattered Thunderstorms in the evening, then isolated Thunderstorms after midnight.
Thursday..Southeast winds around 10 knots then becoming south in the afternoon. Bay and inland waters a light chop. Scattered Thunderstorms. Numerous showers in the afternoon.
GMZ800 Synopsis For The Coastal Waters From Bonita Beach To Suwannee River- 337 Pm Edt Sat Aug 17 2019
Synopsis.. High pressure will hold over the region tonight through the middle of next week with winds and seas gradually subsiding. Scattered showers and Thunderstorms each day will create locally gusty winds and rough seas.


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 171840
afdtbw
area forecast discussion
national weather service tampa bay ruskin fl
240 pm edt Sat aug 17 2019

Short term (today - Sunday)
Upper level ridging extends from bermuda southwestward over the
bahamas and southern florida. This pattern will persist for the next
36 hours before a transition begins to start out next week. A
southwest flow will continue allowing for the rainfall and
thunderstorms to continue moving in from the gulf coast waters
keeping the region very wet. This has warranted the extension of
the flood watch for pasco county northward through Sunday morning.

The 12z morning sounding showed a reflection of this with 2.18
inches pwat and southwest winds through 20k feet. Latest hrrr
guidance keeps rain chances high with 50-80% pops expected across
the region today with the highest chances north of tampa bay.

Moisture will remain high based on forecasted soundings coming in
around 2 inches pwat before a slight drying out beginning on
Monday dropping below 2 inches for the first time in a couple of
weeks. Latest hrrr guidance keeps rain chances high with a 50-80%
pops expected across the region today and tomorrow. With the
extensive cloudiness and high rain chances, daytime high temps
will run below average for the next couple of days.

Long term (Sunday night - Saturday)
Sunday night through Monday looks to be the transition period back
to a more normal pattern. Monday morning should see the final round
of morning showers along the NW coast as the very messy low pressure
system finally makes a grand exit from the region. Winds will then
gradually begin to change from the wsw to a more ese flow. This will
begin to concentrate rainfall more to the south and inland, away
from regions that have been very wet over the last few days.

However, with soils remaining saturated and water levels already
running high, locally heavy downpours may continue to inundate areas
and cause localized flooding.

Zonal flow will lead to very little synoptic influence in florida
weather for next week once the current low pressure system is no
longer a factor. Subsequently, high pressure will build back in
across the peninsula, and easterly flow will return with the
anticyclonic (clockwise) movement of air around the surface high
pressure system known as the subtropical or bermuda-azores high.

This will lead to scattered showers and thunderstorms across west
central and southwest florida during the afternoon and evening hours
each day. High temperatures will run around normal once more, in the
upper 80s at the coast and the lower 90s inland.

Models that were hinting at the possibility of the wet pattern
returning near the end of next week with the return of meridional
flow now appear to have backed off this trend. The trough axis that
was expected to dig now appears to be staying farther north, with
the center of the system being located in central canada. While a
rather weak axis may exist across ohio river valley, mid-atlantic,
and eventually new england, strong surface high pressure appears to
prevent the system from pushing any significant energy into our
area. Subsequently, the typical summertime pattern appears to hold
into next weekend.

Aviation
We continue to remain in a very moist and unstable southwest flow
through the day. Shra with embedded tsra can be expected through the
forecast period with southwest winds around 5-10 knots. The highest
rain storm chances will be from ksrq northward with brief periods of
MVFR ifr conditions possible through this afternoon, so will hold
vcts through 00z and will closely monitor radar for needed tempo
changes through the day.

Marine
Interaction between high pressure ridging south of florida and
troughing over the eastern u.S. Will continue to generate breezy
southwesterly winds across the waters today and tonight, producing
exercise caution conditions over the northern outer waters. The
ridge will lift north into the waters by Monday and into next week,
with winds gradually turning to southerly and then easterly. After
tonight, winds are generally expected to remain below headline
criteria outside of daily thunderstorms.

Fire weather
Scattered to numerous showers and storms each day combined with high
humidities will preclude any fire weather concerns through the
period.

Preliminary point temps pops
Tpa 76 90 76 91 50 40 20 50
fmy 76 92 75 91 30 40 20 70
gif 74 92 74 92 20 40 20 60
srq 76 90 75 91 50 50 10 50
bkv 73 90 73 91 50 70 30 50
spg 76 90 76 91 50 40 20 40

Tbw watches warnings advisories
Fl... Flood watch through Sunday morning for coastal citrus-coastal
hernando-coastal levy-coastal pasco-inland citrus-inland
hernando-inland levy-inland pasco-sumter.

Coastal flood advisory until 8 pm edt this evening for coastal
citrus-coastal levy.

High rip current risk until 8 pm edt this evening for coastal
charlotte-coastal hillsborough-coastal lee-coastal manatee-
coastal sarasota-pinellas.

Gulf waters... None.

Short term aviation marine fire weather... 74 wynn
upper air... 97 flannery
decision support... 57 mcmichael


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
CLBF1 6 mi98 min SSW 5.1 G 8 81°F 1016.7 hPa
SAPF1 - 8726520 - St. Petersburg, FL 8 mi44 min SW 5.1 G 6 81°F 84°F1018.3 hPa
CWBF1 - 8726724 - Clearwater Beach, FL 13 mi50 min WSW 17 G 20 81°F 85°F1018 hPa
MTBF1 13 mi44 min SSW 7 G 8.9 80°F 1018.3 hPa72°F
OPTF1 - 8726607 - Old Port Tampa, FL 13 mi44 min S 8.9 G 11 81°F 83°F1018 hPa
GCTF1 14 mi44 min 81°F 1018.3 hPa72°F
42098 16 mi32 min 86°F3 ft
PMAF1 16 mi44 min 80°F 85°F1018 hPa
MCYF1 21 mi44 min 83°F
TSHF1 - 8726667 - East Bay Causeway, FL 21 mi50 min SSE 7 G 9.9
FHPF1 - Fred Howard Park, FL 25 mi98 min S 12 G 13 81°F 1017.8 hPa
42013 - C10 - Navy-2 43 mi62 min S 3.9 G 3.9 81°F 85°F1018.2 hPa
ARPF1 - APK - Aripeka, FL 45 mi98 min S 1.9 G 4.1 88°F 1017.2 hPa

Wind History for St. Petersburg, FL
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Albert Whitted Airport, FL8 mi1.7 hrsS 610.00 miMostly Cloudy80°F73°F79%1017 hPa
St. Petersburg/Clearwater Airport, FL10 mi1.7 hrsSSW 810.00 miPartly Cloudy82°F72°F72%1017.4 hPa
Macdill Air Force Base, Fl., FL15 mi96 minSSW 810.00 miLight Rain80°F72°F78%1017.9 hPa
Tampa, Tampa International Airport, FL18 mi1.7 hrsSSW 810.00 miLight Rain80°F72°F76%1017.7 hPa
Tampa, Peter O Knight Airport, FL20 mi57 minSSW 810.00 miOvercast81°F75°F84%1017.9 hPa

Link to 5 minute data for KSPG

Wind History from SPG (wind in knots)
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Last 24hr--SW9W12
G27
--SW5SW4--SW4--S6S6--CalmW13
G25
N3--S10SW11--S5SW10SW6SW9S6
1 day ago------S13S14S12--S7S16--------SW5--------SW6S125S3--S9
2 days agoS8SW8SW9SW6S16
G26
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G26
SW4S4S4

Tide / Current Tables for Johns Pass, Boca Ciega 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 Tampa Bay Entrance (Egmont Channel), Florida Current
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Tampa Bay Entrance (Egmont Channel)
Click for Map
Sat -- 01:47 AM EDT     1.40 knots Max Flood
Sat -- 05:15 AM EDT     -0.00 knots Slack
Sat -- 07:02 AM EDT     Sunrise
Sat -- 07:22 AM EDT     -0.56 knots Max Ebb
Sat -- 08:44 AM EDT     Moonset
Sat -- 09:30 AM EDT     0.00 knots Slack
Sat -- 01:02 PM EDT     1.40 knots Max Flood
Sat -- 03:57 PM EDT     -0.00 knots Slack
Sat -- 07:29 PM EDT     -1.81 knots Max Ebb
Sat -- 08:07 PM EDT     Sunset
Sat -- 09:42 PM EDT     Moonrise
Sat -- 11:11 PM EDT     0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.81.31.41.20.70.1-0.3-0.5-0.5-0.20.20.81.21.41.20.7-0-0.8-1.4-1.8-1.8-1.4-0.9-0.1

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.
Link to Loop

Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for Tampa Bay, FL (18,4,5,8)
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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.