Tuesday, November21, 2017 L-36.com


Marine Weather and Tides
Madeira Beach, FL

Version 3.4
What's New / NOTES
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.
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.

Sunrise 6:56AMSunset 5:37PM Tuesday November 21, 2017 4:29 PM EST (21:29 UTC) Moonrise 9:28AMMoonset 8:19PM Illumination 10% Phase: Waxing Crescent; Moon at 3 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- 320 Pm Est Tue Nov 21 2017
Tonight..Variable winds around 5 knots. Bay and inland waters smooth. A slight chance of showers in the evening.
Wednesday..East winds around 5 knots becoming northwest 5 to 10 knots late in the afternoon. Bay and inland waters smooth. A chance of showers and a slight chance of Thunderstorms in the afternoon.
Wednesday night..North winds around 5 knots becoming east around 10 knots in the late evening and overnight. Bay and inland waters a light chop. A slight chance of Thunderstorms. A chance of showers after midnight.
Thursday..Southeast winds around 10 knots becoming south 5 to 10 knots in the afternoon. Bay and inland waters a light chop. Showers likely and a slight chance of Thunderstorms.
Thursday night..Southeast winds around 5 knots then becoming northeast in the late evening and overnight. Bay and inland waters smooth. Showers likely and a slight chance of Thunderstorms.
Friday..Northeast winds around 10 knots. Bay and inland waters a light chop. A chance of showers and a slight chance of Thunderstorms.
Friday night..North winds 5 to 10 knots. Bay and inland waters smooth. A slight chance of Thunderstorms.
Saturday..Northwest winds 5 to 10 knots. Bay and inland waters smooth.
Saturday night..Northwest winds around 10 knots. Bay and inland waters a light chop.
Sunday..North winds around 10 knots. Bay and inland waters a light chop.
GMZ800 Synopsis For The Coastal Waters From Bonita Beach To Suwannee River- 320 Pm Est Tue Nov 21 2017
Synopsis..High pressure will continue to move east well out into the atlantic ocean tonight with a warm front continuing to move north across the region. On Wednesday an area of low pressure will develop over the central gulf. This low will move east northeast across the northern florida peninsula during Thursday and Thursday night and into the atlantic ocean on Friday. Sufficient moisture combined with this storm system will continue to support scattered to numerous showers and isolated Thunderstorms over the waters through Friday. Pleasant dry weather will return to the waters on Saturday as high pressure builds in over the region.

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 212021
afdtbw
area forecast discussion
national weather service tampa bay ruskin fl
321 pm est Tue nov 21 2017

Short term (tonight through Wednesday)
Mid upper level trough will continue to amplify over the western
gulf of mexico with a lead shortwave moving out of the region this
evening. This combined with the warm front lifting north will
continue to pop a few showers and possibly a thunderstorm this
evening. Overnight plenty of low level moisture along with clouds
thinning out will allow areas of fog to develop and some of it
could become locally dense toward morning. This fog should lift
and dissipate during mid- morning Wednesday with partly sunny and
muggy conditions for the remainder of the day. Daytime heating
combined with the stalled boundary across the northern areas will
allow a few showers and possibly a thunderstorm to develop during
the afternoon with best chances across the nature coast. Lows
tonight will range from the upper 50s north to the mid 60s near
the coast from around tampa bay southward with highs on Wednesday
climbing into the mid 70s to lower 80s.

Mid term long term (Wednesday night through Tuesday)
Aloft - a ridge centered over northern baja california slowly slides
into northwest mexico as a strong shortwave trough shifts across the
gulf of mexico and over fl to the atlantic by sat. During Sun the
ridge continues on a southeastward track as a second and less robust
short wave trough sweeps southeastward across the eastern gulf and
fl. The ridge center reaches the western gulf by Tue and sprawls
east to fl. Surface - a frontal boundary initially from near the
yucatan to northern fl eases eastward to the atlantic coastal waters
by sat... As the upper trough spins up a series of waves lows that
track along the boundary. A dry secondary cold front tracks down the
state Sun and Sun night... Ushered in by the second short wave
trough... As canadian high pressure settles into the nation S mid-
section. This high pressure treks to the eastern seaboard by the end
of the period.

The upper trough along with boundary and it S waves or lows will
result in southerly becoming southwesterly aloft that streams in
some deeper moisture with chance to likely showers and slight chance
thunderstorms. The operative phrase is deeper moisture which in this
case is expected to be in the range of 1.5 to 1.7 inches of pwat.

These amounts will limit rainfall rates with only occasionally
heavier rain. The showers and storms will be trending down and
exiting the area sat. Then the secondary front with the canadian air
behind it takes over with generally mostly clear to clear and dry
conditions. Temperatures initially above normal cool to below for
sun-mon but then climb back to near normal for the end of the
period.

Aviation
MainlyVFR ceilings are expected into early tonight, then late
tonight into Wednesday morning conditions will deteriorate with
MVFR and eventually ifr local lifr conditions in low clouds and
fog anticipated. Conditions will improve during the mid to late
morning hours Wednesday.

Marine
Gradient has relaxed as high pressure off the southeast u.S. Coast
continues to move further out into the atlantic ocean. Winds will
remain rather light tonight through Wednesday then begin to
increase some as low pressure develops over the central gulf and
moves east late in the week. At this time wind speeds are expected
to remain around 15 knots or less through Saturday, then could
reach exercise caution criteria Sunday behind the next cold front.

Fire weather
Relative humidity values will remain above critical levels with
no fire weather issues expected through the week as plentiful
moisture remains across the region. This increase in moisture will
lead to some fog during the late night and early morning hours
tonight through Friday.

Preliminary point temps pops
Tpa 67 80 67 76 20 30 40 70
fmy 66 83 66 80 10 20 20 60
gif 63 81 64 77 20 30 20 70
srq 65 80 65 76 10 30 30 60
bkv 59 79 62 75 20 40 40 70
spg 67 78 67 76 20 30 30 70

Tbw watches warnings advisories
Fl... None.

Gulf waters... None.

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


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
CLBF1 6 mi95 min ENE 2.9 G 6 74°F 1012.2 hPa
SAPF1 - 8726520 - St. Petersburg, FL 8 mi47 min NE 5.1 G 6 74°F 70°F1013 hPa
OPTF1 - 8726607 - Old Port Tampa, FL 13 mi41 min E 5.1 G 8.9 74°F 70°F1013 hPa
MTBF1 13 mi41 min ESE 7 G 8 72°F 1012.9 hPa
CWBF1 - 8726724 - Clearwater Beach, FL 13 mi41 min E 7 G 8.9 73°F 69°F1013.1 hPa
42098 16 mi29 min 71°F1 ft
PMAF1 16 mi41 min 76°F 71°F1012.2 hPa
TPAF1 - 8726694 - TPA Cruise Terminal 2, Tampa, FL 21 mi59 min E 6 G 8.9
TSHF1 - 8726667 - East Bay Causeway, FL 21 mi53 min E 5.1 G 7
MCYF1 21 mi41 min 72°F
FHPF1 - Fred Howard Park, FL 25 mi95 min ESE 11 G 13 1012.7 hPa
42013 - C10 - Navy-2 43 mi59 min ESE 9.7 G 12 74°F
ARPF1 - APK - Aripeka, FL 45 mi95 min ESE 5.1 G 8 76°F 1012.8 hPa

Wind History for St. Petersburg, FL
(wind in knots)    EDIT      (on/off)   Help
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Albert Whitted Airport, FL8 mi36 minENE 610.00 miA Few Clouds72°F68°F87%1012.4 hPa
St. Petersburg/Clearwater Airport, FL10 mi36 minE 810.00 miA Few Clouds74°F68°F82%1012.9 hPa
Macdill Air Force Base, Fl., FL15 mi33 minENE 810.00 miLight Drizzle76°F69°F80%1013.2 hPa
Tampa, Tampa International Airport, FL18 mi36 minE 410.00 miMostly Cloudy76°F64°F67%1013.3 hPa
Tampa, Peter O Knight Airport, FL20 mi34 minE 510.00 mi73°F66°F78%1013.2 hPa

Wind History from SPG (wind in knots)
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Last 24hrE6E10E14E12E13E13E12E11E13E11E12E11E12E13E9E7E6E5SE4SE8SE5E4E5E6
1 day agoN10N9N8N7N9N13N14NE15NE18
G23
NE16NE15NE14NE16NE15NE13NE13NE11NE10E11E8E9E10E8E7
2 days agoW8W4W5W3W4W5W4W4W4W3W3W3CalmW3W5CalmSW6W9W9W10
G19
W10W8W6N10

Tide / Current Tables for Johns Pass, Boca Ciega Bay, Florida
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Johns Pass
Click for Map
Tue -- 06:57 AM EST     Sunrise
Tue -- 07:42 AM EST     -0.20 feet Low Tide
Tue -- 09:27 AM EST     Moonrise
Tue -- 02:40 PM EST     1.44 feet High Tide
Tue -- 05:36 PM EST     Sunset
Tue -- 06:16 PM EST     1.32 feet Low Tide
Tue -- 08:19 PM EST     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
2.32.21.91.40.90.50.1-0.2-0.2-00.30.711.31.41.41.41.41.31.31.51.722.2

Tide / Current Tables for Tampa Bay Entrance (Egmont Channel), Florida Current
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Tampa Bay Entrance (Egmont Channel)
Click for Map
Tue -- 02:25 AM EST     -0.00 knots Slack
Tue -- 06:09 AM EST     -1.95 knots Max Ebb
Tue -- 06:56 AM EST     Sunrise
Tue -- 09:26 AM EST     Moonrise
Tue -- 10:16 AM EST     0.00 knots Slack
Tue -- 01:44 PM EST     1.45 knots Max Flood
Tue -- 05:36 PM EST     Sunset
Tue -- 05:59 PM EST     -0.00 knots Slack
Tue -- 07:24 PM EST     -0.22 knots Max Ebb
Tue -- 08:19 PM EST     Moonset
Tue -- 08:51 PM EST     0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
1.10.90.3-0.4-1.2-1.7-1.9-1.8-1.4-0.9-0.20.511.41.41.20.80.4-0-0.2-0.200.40.8

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 (16,3,4,5)
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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.