Thursday, July29, 2021
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Marine Weather and Tides
Key Biscayne, FL

Version 3.4
NOTICE
3/30/2021 -- ANZ330 has been split into ANZ331 and ANZ332. Click EDIT in Marine Forecast and select your new zone.
1/26/2021 -- The West Coast Satellite images havd been updated. They now use GEOS-17.
1/1/2021 -- The 7 day forecast are now working well. Thank you NOAA for your support.

Sunrise 6:44AMSunset 8:09PM Thursday July 29, 2021 11:45 AM EDT (15:45 UTC) Moonrise 11:06PMMoonset 10:59AM Illumination 72% Phase: Waning Gibbous; Moon at 20 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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AMZ630 Biscayne Bay- 1005 Am Edt Thu Jul 29 2021
Rest of today..South southeast winds 5 to 10 knots. Bay waters a light chop. Chance of showers and Thunderstorms through the day.
Tonight..South southeast winds around 5 knots. Bay waters smooth. Slight chance of showers and Thunderstorms.
Friday..South southeast winds 5 to 10 knots. Bay waters a light chop. Chance of showers and Thunderstorms.
Friday night..South southeast winds 5 to 10 knots. Bay waters a light chop.
Saturday..South southeast winds 5 to 10 knots. Bay waters a light chop. Chance of showers and Thunderstorms.
Saturday night..South southeast winds 5 to 10 knots. Bay waters a light chop.
Sunday..Southeast winds 5 to 10 knots. Bay waters a light chop. Chance of showers and Thunderstorms.
Sunday night..South southeast winds 5 to 10 knots. Bay waters a light chop. Slight chance of showers and Thunderstorms late in the evening, then chance of showers and Thunderstorms after midnight.
Monday..South southeast winds 5 to 10 knots. Bay waters a light chop. Showers likely and chance of Thunderstorms.
AMZ600 Synopsis For Jupiter Inlet To Ocean Reef Fl Out To 60 Nm And For East Cape Sable To Bonita Beach Fl Out To 60 Nm- 1005 Am Edt Thu Jul 29 2021
Synopsis.. High pressure ridge over south florida will keep benign marine conditions through the rest of the week and the upcoming weekend, outside of showers and Thunderstorms. Scattered showers and Thunderstorms are possible across the atlantic and gulf waters each day. Expect periods of rough seas and gusty winds in and around any Thunderstorm.
Gulf stream hazards..Winds and waves could be locally higher in and around any shower or Thunderstorm. The approximate location of the west wall of the gulf stream as of jul 29, 2021 at 1200 utc... 11 nautical miles east of fowey rocks. 21 nautical miles east southeast of port everglades. 18 nautical miles east of lake worth. 13 nautical miles east of jupiter inlet. This data courtesy of the naval oceanographic office.


7 Day Forecast for Marine Location Near Key Biscayne, FL
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location: 25.7, -80.17     debug


Area Discussion for - Miami-South Florida, FL
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FXUS62 KMFL 291405 AFDMFL

Area Forecast Discussion National Weather Service Miami FL 1005 AM EDT Thu Jul 29 2021

. Thunderstorms with Locally Heavy Rainfall and Flooding Possible This Afternoon .

UPDATE. Surface and low level ridge has nudged northward over the past 24 hours, now located right over the southernmost part of the peninsula. The 12z Miami sounding reflects this with 0-3 km mean wind SSE at 4 knots compared with the west wind of the past two days. In the mid and upper levels, a weak trough extends northward across our area from the cyclonic circulation over western Cuba. Moisture levels remain virtually unchanged with precipitable water value from the Miami sounding of 1.84 inches, and near 2 inches across most of South Florida based on TPW data from GOES-16.

Weak forcing provided by the mid/upper trough along with good morning insolation/instability will aid in the development of showers and thunderstorms over the peninsula, starting later this morning over the east coast metro areas (earlier than past days), around midday along the Gulf coast seabreeze front, then eventually concentrate over the interior by mid-afternoon. Increased rain chances some for today over the interior and east coast metro areas in accordance with the short range guidance and pattern described above, with highest PoPs over the Everglades and Lake Okeechobee areas.

Localized rain amounts in excess of 2" have been observed each of the past few days, and today should be no different due to the slow storm motion. In fact, there may be a slightly higher chance of localized flooding than previous days due to the S-SW storm motion paralleling the sea breeze boundaries and helping to propagate and back-build storms along the boundaries. The marginal excessive rain risk by the Weather Prediction Center for today is certainly in play, and the metro areas along both coasts continue with the higher threat (more so Atlantic coast vs. Gulf).

PREV DISCUSSION. (Issued 803 AM EDT Thu Jul 29 2021)

AVIATION(12Z TAFS) . Showers and thunderstorms are expected to form near the SE Florida terminals around 14z and continue through about 20z-22z. Coverage should be scattered enough for VCTS with TEMPO MVFR ceilings to cover this scenario, with possible amendments for any cells that develop or move over a terminal. At KAPF, VCTS after 16z is in effect to cover storms forming along the Gulf seabreeze. Light/variable winds, with sea breezes 8-10 knots predominating after 15z.

PREV DISCUSSION . (Issued 357 AM EDT Thu Jul 29 2021)

Another warm, wet day in store for South Florida.

SHORT TERM (Today through Friday) . The warm, wet pattern continues across South Florida as a tropical upper tropospheric trough (TUTT) departs the region today. The TUTT is centered between Key West and Cuba this morning as it continues westward towards the Gulf of Mexico. Some convection is firing along the eastern fringes of the TUTT which could make their way westward through the morning across the Atlantic waters towards South Florida. At the surface, the ridge axis remains over the southern peninsula of Florida which is creating a very light wind flow pattern that will largely be dominated by any sea and lake breezes that develop.

The environment will still be ripe for showers and thunderstorms today, particularly inland where boundary collisions later today will be more numerous. Sufficient moisture and available instability thanks to diurnal heating should permit decent coverage of convection again today. Behind the TUTT, some relatively drier air and subsidence could help create a lull in convection tonight. To the north, a weakening trough will slide southward into south central Florida becoming more diffuse through the day on Friday. This will help keep showers and storms in the forecast on Friday with a focus for convection over northern portions of the area around Lake Okeechobee.

Temperatures both days will reach the lower to mid 90s for highs with heat index values in the triple digits. Strong thunderstorms capable of producing frequent to excessive lightning, heavy rainfall which could lead to localized flooding, and strong wind gusts are possible both days. Cannot rule out waterspout activity over the local waters and funnel clouds with any boundary interactions on either day as well.

LONG TERM (Friday Night through Wednesday) . A ridge of high pressure extending over South Florida from the Atlantic will be pinched by a weak trough sitting just north of the area. Aloft, the supporting trough axis shifts north and east away from the region which will allow for the surface ridge to gain some mid-level component and slide slightly northward. With this northward axis movement, a more southerly flow will become established heading into next week though the light flow will permit an onshore component along each coast with sea breeze development most days. Temperatures will remain warm with lower to mid 90s for highs and heat index values in the upper 90s to triple digits. Shower and thunderstorm chances will remain at least close to climatological averages though shifts in available moisture could impact PoPs from day to day, particularly in the extended period of the forecast.

MARINE . Light wind and the lack of any major surface low pressure in the region should keep seas 2 feet or less outside of locally higher waves due to showers and thunderstorms through most of the week. Waterspouts are also possible across all the South Florida waters today.

PRELIMINARY POINT TEMPS/POPS. Miami 79 92 80 93 / 20 40 10 40 West Kendall 77 93 77 93 / 20 40 10 40 Opa-Locka 78 93 78 93 / 20 40 10 40 Homestead 78 91 77 91 / 20 30 10 30 Fort Lauderdale 79 91 80 91 / 20 40 10 40 N Ft Lauderdale 79 91 80 92 / 20 40 10 40 Pembroke Pines 78 92 78 92 / 20 40 10 40 West Palm Beach 77 92 77 92 / 20 50 20 40 Boca Raton 78 93 79 93 / 20 40 20 40 Naples 78 91 78 92 / 20 40 20 40

MFL WATCHES/WARNINGS/ADVISORIES. FL . None. AM . None. GM . None.

Update . Molleda

Visit us at weather.gov/miami

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Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
VAKF1 - 8723214 - Virginia Key, FL 2 mi57 min NNE 4.1 G 5.1 86°F 91°F1018.9 hPa
FWYF1 - Fowey Rocks, FL 8 mi45 min E 6 G 7 85°F 86°F1018.4 hPa (+1.3)
PEGF1 27 mi57 min SSW 6 G 8.9 84°F 1018.6 hPa
MDKF1 31 mi105 min 90°F
HCEF1 - Highway Creek, FL 34 mi105 min 92°F
MNBF1 35 mi105 min 90°F
THRF1 36 mi165 min 89°F
LSNF1 - Long Sound, FL 36 mi105 min 89°F
LBSF1 - Little Blackwater, FL 36 mi165 min 89°F
JBYF1 38 mi105 min 89°F
TCVF1 - Trout Cove, FL 39 mi105 min 88°F
BWSF1 - Blackwater Sound, FL 39 mi165 min 89°F
DKKF1 - Duck Key, FL 40 mi165 min 89°F
TRRF1 - Taylor River, FL 42 mi105 min 91°F
LMDF1 - Little Madeira, FL 44 mi105 min 88°F
CANF1 - Cane Patch, FL 45 mi105 min 84°F
BNKF1 - Butternut Key, FL 46 mi105 min 90°F
BDVF1 - Broad River, FL 46 mi105 min 86°F
NRRF1 47 mi105 min 85°F
TPEF1 - Tarpon Bay East, FL 47 mi105 min 87°F
LRIF1 48 mi105 min 87°F
TBYF1 48 mi105 min 87°F

Wind History for Virginia Key, FL
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Miami, Miami International Airport, FL10 mi52 minVar 410.00 miMostly Cloudy89°F75°F63%1018.2 hPa
Miami, Kendall-Tamiami Executive Airport, FL14 mi52 minWSW 310.00 miPartly Cloudy89°F73°F59%1018.1 hPa
Miami, Opa Locka Airport, FL16 mi52 minS 310.00 miPartly Cloudy86°F74°F67%1018.5 hPa
Homestead Air Reserve Base, FL19 mi49 minN 010.00 miPartly Cloudy87°F75°F67%1018.3 hPa
Hollywood, North Perry Airport, FL21 mi52 minWSW 910.00 miPartly Cloudy83°F72°F70%1018.7 hPa

Link to 5 minute data for KMIA

Wind History from MIA (wind in knots)
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Last 24hrCalmSE8S9SE9S9NE4CalmW4NW4NW5CalmCalmCalmCalmCalmCalmCalmCalmN4CalmCalmCalmCalm4
1 day ago5SE9SE15
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W5W54E5S4SW4CalmCalm3CalmCalmCalmCalmCalmCalmE34
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Tide / Current Tables for Key Biscayne Yacht Club, Biscayne Bay, Florida
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Key Biscayne Yacht Club
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Thu -- 01:48 AM EDT     2.06 feet High Tide
Thu -- 06:45 AM EDT     Sunrise
Thu -- 08:33 AM EDT     0.07 feet Low Tide
Thu -- 11:58 AM EDT     Moonset
Thu -- 02:18 PM EDT     1.94 feet High Tide
Thu -- 08:08 PM EDT     Sunset
Thu -- 08:52 PM EDT     0.24 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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1.622.11.91.61.10.70.30.10.10.40.81.31.71.91.91.71.30.90.60.30.20.40.8

Tide / Current Tables for Miami Harbor Entrance, Florida Current
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Miami Harbor Entrance
Click for Map
Thu -- 02:06 AM EDT     -0.00 knots Slack
Thu -- 05:41 AM EDT     -1.42 knots Max Ebb
Thu -- 06:45 AM EDT     Sunrise
Thu -- 08:22 AM EDT     0.00 knots Slack
Thu -- 11:46 AM EDT     1.83 knots Max Flood
Thu -- 11:58 AM EDT     Moonset
Thu -- 02:36 PM EDT     -0.00 knots Slack
Thu -- 06:05 PM EDT     -1.20 knots Max Ebb
Thu -- 08:08 PM EDT     Sunset
Thu -- 08:43 PM EDT     0.00 knots Slack
Thu -- 11:43 PM EDT     1.69 knots Max Flood
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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1.81.20.1-0.8-1.2-1.4-1.4-1.2-0.40.71.51.81.81.50.6-0.4-0.9-1.1-1.2-1.1-0.70.31.21.6

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