Friday, December13, 2019
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Marine Weather and Tides
Indian Shores, FL

Version 3.4
NOTICE
10/9/2019 Updated the Marine Zones.
9/4/2019 Fixed the weather maps due to NOAA moving them.
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 7:11AMSunset 5:38PM Friday December 13, 2019 8:03 PM EST (01:03 UTC) Moonrise 7:12PMMoonset 8:30AM 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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GMZ853 Coastal Waters From Englewood To Tarpon Springs Fl Out 20 Nm- 201 Pm Est Fri Dec 13 2019
Tonight..Southwest winds around 15 knots. Seas 2 to 4 feet. Bay and inland waters a moderate chop. A chance of Thunderstorms. Showers likely toward morning. Patchy sea fog after midnight.
Saturday..West winds around 20 knots then becoming northwest 10 to 15 knots in the afternoon. Seas 2 to 4 feet. Bay and inland waters choppy. Patchy sea fog early in the morning. A chance of showers early in the morning, then a slight chance of showers late in the morning.
Saturday night..North winds around 10 knots. Seas 2 to 4 feet. Bay and inland waters a light chop.
Sunday..East winds around 10 knots. Seas 2 to 3 feet. Bay and inland waters a light chop.
Sunday night..East winds 5 to 10 knots then becoming southeast around 15 knots after midnight. Seas 2 to 3 feet. Bay and inland waters a moderate chop.
Monday..Southeast winds around 15 knots diminishing to 5 to 10 knots in the afternoon. Seas 2 to 3 feet. Bay and inland waters a moderate chop.
Monday night..Southeast winds around 10 knots. Seas 2 feet. Bay and inland waters a light chop.
Tuesday..South winds around 10 knots then becoming southwest in the afternoon. Seas 2 feet. Bay and inland waters a light chop. A chance of showers in the morning, then showers likely in the afternoon.
Tuesday night..Northwest winds 5 to 10 knots then becoming north around 20 knots after midnight. Seas 2 to 4 feet. Bay and inland waters choppy. Showers likely in the evening, then a chance of showers after midnight.
Wednesday..North winds around 20 knots. Seas 4 to 6 feet. Bay and inland waters choppy. A slight chance of showers in the morning.
GMZ800 Synopsis For The Coastal Waters From Bonita Beach To Suwannee River- 201 Pm Est Fri Dec 13 2019
Synopsis..Low pressure will develop over the northeastern gulf of mexico and move northeast today, bringing showers and a few Thunderstorms. A cold front will then move through the region tonight into Saturday, with winds becoming southwest and then northwest through the day and wind speeds increasing to exercise caution levels for a time overnight. Winds will diminish starting later Saturday as high pressure builds in behind the front. There remains some potential for sea fog to develop, mainly north of tampa bay, starting tonight into early Saturday.


7 Day Forecast for Marine Location Near Indian Shores, FL
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location: 27.79, -83.03     debug


Area Discussion for - Tampa Bay, FL
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FXUS62 KTBW 140055 AFDTBW

Area Forecast Discussion National Weather Service Tampa Bay Ruskin FL 755 PM EST Fri Dec 13 2019

UPDATE. Water vapor satellite imagery and 500mb analysis maps show a pretty strong jet streak situated over portions of Southern LA, AL and the Florida Panhandle. This is associated with a negatively tilted shortwave trough axis propagating to the ENE towards the FL peninsula. Across much of the state, conditions remain fairly warm and humid. Dewpoints are running in the upper 60s to low 70s in the wake of what has now become a stationary front. The 0Z sounding also shows a weak veering wind profile, indicative of WAA. Combining this WAA with synoptic-scale PVA, this is the perfect environment for large-scale ascent. Indeed this has already been proven to be true with the earlier line of showers that passed through.

However, conditions have stabilized somewhat for the moment, allowing the atmosphere to recover and regroup for round two. What can also be noted in the 0Z sounding is a pretty decent capping inversion around 820mb. This explains why much of the earlier shower activity likely fell apart (in combination with several other factors like SSTs along the shelf). Despite the inversion, the atmosphere has a fairly deep well-mixed layer just above and just below the inversion . suggesting significant positive buoyancy once once this begins to erode.

While some directional shear is noted in the sounding at the moment, and some weak directional shear will continue to exist, what there will be more of tonight is speed shear. RAP soundings from 6Z onward show little directional shear and only around 30kts of speed shear in the first 3km. This does not make for a particularly high threat for tornadoes, but rather for an environment that could support some damaging wind gusts across portions of West Central and SW Florida.

Suffice all that to say, a line of storms is likely to approach the peninsula in the early hours of Saturday morning, bringing the potential for some damaging wind gusts and an isolated tornado in the overnight hours to the peninsula. This risk diminishes further to the South as convection moves father away from the most favorable environment. Timing sets up for areas North of Tampa Bay to see the greatest threat between 1AM and 5AM and from Tampa Bay Southward from around 4AM to 11AM. The current forecast remains on track, and no major changes have been made.

AVIATION. Conditions remain VFR ahead of an approaching cold front. A line of storms will likely set up overnight and push towards terminals, leading to brief MVFR/IFR conditions, but timing is still not an absolute certainty. For now, will leave VCTS in and later TAFs will add TEMPO/Prevailing groups as necessary to provide a more accurate representation of timing. Conditions could become temporarily MVFR, but after the passage VFR will prevail. Winds out of the SW generally 10kts or less overnight will turn out of the NW by the afternoon.

MARINE. An approaching cold front will bring the potential for showers and thunderstorms overnight into coastal waters with the potential for gusty winds, heavy rain, and possible waterspouts. A potential for sea fog still exists for the Nature Coast, but this will likely be short-lived and patchy in nature. Cautionary statements are in effect for outer waters tonight, but conditions will begin to settle down after the front passes tomorrow.

Preliminary Point Temps/PoPs. TPA 78 67 75 55 / 50 70 30 0 FMY 81 68 79 56 / 20 40 60 0 GIF 78 66 76 52 / 30 50 50 0 SRQ 79 67 78 55 / 30 60 50 0 BKV 78 63 74 48 / 60 70 20 0 SPG 77 68 75 57 / 50 70 40 0

TBW WATCHES/WARNINGS/ADVISORIES. FL . High Rip Current Risk from 7 AM EST Saturday through Saturday evening for Coastal Charlotte-Coastal Hillsborough-Coastal Lee-Coastal Manatee-Coastal Sarasota-Pinellas.

Gulf waters . None.

UPDATE/AVIATION/MARINE/FIRE WEATHER . 97/Flannery UPPER AIR . 74/Wynn DECISION SUPPORT . 27/Shiveley


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
42098 15 mi34 min 70°F2 ft
CWBF1 - 8726724 - Clearwater Beach, FL 17 mi52 min SSE 6 G 7 71°F 71°F1010.2 hPa
CLBF1 19 mi70 min SSW 4.1 G 5.1 71°F 1010.2 hPa
SAPF1 - 8726520 - St. Petersburg, FL 21 mi46 min S 15 G 18 71°F 69°F1009.7 hPa
MTBF1 25 mi52 min SW 6 G 8 70°F 1011.2 hPa67°F
OPTF1 - 8726607 - Old Port Tampa, FL 26 mi52 min S 9.9 G 13 70°F 70°F1010.2 hPa
GCTF1 27 mi52 min 70°F 1010.6 hPa69°F
PMAF1 27 mi46 min 71°F 71°F1010.9 hPa
FHPF1 - Fred Howard Park, FL 28 mi70 min S 11 G 13 71°F 1010.2 hPa
MCYF1 33 mi46 min 70°F
TPAF1 - 8726694 - TPA Cruise Terminal 2, Tampa, FL 33 mi46 min S 11 G 13
TSHF1 - 8726667 - East Bay Causeway, FL 33 mi52 min ESE 11 G 12
42022 43 mi94 min SSW 18 G 21 75°F 77°F1009.9 hPa
ARPF1 - APK - Aripeka, FL 48 mi190 min SE 1 G 2.9 74°F 1010.2 hPa

Wind History for Clearwater Beach, FL
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
St. Petersburg/Clearwater Airport, FL20 mi71 minSSE 910.00 miFair71°F66°F87%1009.6 hPa
Albert Whitted Airport, FL21 mi71 minSSW 510.00 miPartly Cloudy70°F68°F93%1009.9 hPa

Link to 5 minute data for KPIE

Wind History from PIE (wind in knots)
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Last 24hrE8E8E11E9E7SE6E4SE5SE6E5SE5CalmCalmCalmCalmE3CalmW4SW6S11S12S8S9S9
1 day agoNE9NE13
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2 days agoS7S4S3SW6S3S4S4CalmCalmE43CalmCalmNE4E3NE4NE4N4N3NW9N7NE8NE13
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Tide / Current Tables for Indian Rocks Beach (inside), Florida
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Indian Rocks Beach (inside)
Click for Map
Fri -- 12:06 AM EST     2.65 feet High Tide
Fri -- 07:13 AM EST     Sunrise
Fri -- 07:23 AM EST     -0.66 feet Low Tide
Fri -- 08:29 AM EST     Moonset
Fri -- 01:59 PM EST     2.39 feet High Tide
Fri -- 05:37 PM EST     Sunset
Fri -- 07:10 PM EST     0.88 feet Low Tide
Fri -- 07:11 PM EST     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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2.62.52.11.50.80.2-0.4-0.6-0.6-0.20.41.11.82.22.42.21.91.41.10.911.31.82.3

Tide / Current Tables for Tampa Bay Entrance, Florida Current
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Tampa Bay Entrance
Click for Map
Fri -- 01:31 AM EST     -0.00 knots Slack
Fri -- 05:49 AM EST     -3.45 knots Max Ebb
Fri -- 07:12 AM EST     Sunrise
Fri -- 08:28 AM EST     Moonset
Fri -- 10:09 AM EST     0.00 knots Slack
Fri -- 01:20 PM EST     1.92 knots Max Flood
Fri -- 05:37 PM EST     Sunset
Fri -- 05:58 PM EST     -0.00 knots Slack
Fri -- 06:26 PM EST     -0.03 knots Max Ebb
Fri -- 06:55 PM EST     0.00 knots Slack
Fri -- 07:11 PM EST     Moonrise
Fri -- 11:19 PM EST     1.28 knots Max Flood
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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1.10.5-0.5-1.6-2.6-3.3-3.4-3.1-2.3-1.3-0.20.81.51.91.81.40.80.3-000.30.71.11.3

Weather Map
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wmap_A
GEOS 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 (20,4,5,8)
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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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