Jupiter Inlet to Deerfield Beach, FL out 20 - 60 NM Marine Forecast
| Today...S Winds Around 5 Kt, Increasing To 5 To 10 Kt This Afternoon. Seas Less Than 2 Ft Or Less. Wave Detail: Sw 1 Foot At 5 Seconds. Intracoastal Waters Light Chop. A Slight Chance Of Showers And Tstms Late. |
| Tonight...S Winds 5 To 10 Kt. Seas Less Than 2 Ft Or Less. Wave Detail: S 1 Foot At 4 Seconds. Intracoastal Waters Light Chop. |
| Fri...S Winds 5 To 10 Kt. Seas Less Than 2 Ft Or Less. Wave Detail: S 1 Foot At 3 Seconds. Intracoastal Waters Light Chop. A Chance Of Showers And Tstms Late. |
| Fri Night...S Winds 5 To 10 Kt. Seas Less Than 2 Ft Or Less. Wave Detail: S 1 Foot At 3 Seconds. Intracoastal Waters Light Chop. |
| Sat...S Winds 5 To 10 Kt. Seas Less Than 2 Ft Or Less. Wave Detail: S 1 Foot At 3 Seconds. Intracoastal Waters Light Chop. |
| Sat Night...S Winds 10 To 15 Kt. Seas Less Than 2 Ft Or Less. Wave Detail: Se 1 Foot At 3 Seconds. Intracoastal Waters Light Chop. |
| Sun...S Winds 5 To 10 Kt. Seas Less Than 2 Ft Or Less. Intracoastal Waters Light Chop. |
| Sun Night...S Winds 5 To 10 Kt. Seas Less Than 2 Ft Or Less. Intracoastal Waters Light Chop. |
| Mon...Se Winds 5 To 10 Kt. Seas Less Than 2 Ft Or Less. Intracoastal Waters Light Chop. |
| Mon Night...Se Winds 5 To 10 Kt. Seas Less Than 2 Ft Or Less. Intracoastal Waters Light Chop. Winds And Seas Higher In And Near Tstms. |
| Area Forecast Discussion National Weather Service Miami FL 750am EDT Thu August 20 2026 .SHORT TERM... (Today through Friday) Issued at 109am EDT Thu August 20 2026 As the Saharan dust continues to filter out of the area for the end of this week, deeper moisture will simultaneously begin to work back into South Florida for the end of the week as a couple of upper level disturbances in the Caribbean help infiltrate extra tropical moisture. These upper level lows are not expected to reach South Florida, but will still provide this deeper moisture advection. Similarly, an upper-level trough will enhance underneath strong jet dynamics as a result of a stout ridge across the Southwestern US. As the trough deepens and digs southwards, prevailing wind flow will shift to more of a southerly direction across the forecast area. This will result in a pooling of the deep moisture for the end of this week and likely beyond. As a result of the pattern above and the dissipation of the dust plume, temperatures should fall closer to normal in the low to mid 90s for today and tomorrow while convection also initiates a couple hours earlier and starts to become more widespread in the afternoon and evening hours. Given the prevailing southwesterly flow today and eventually southerly flow on Friday and into the weekend, the Atlantic sea breeze will not advance as far inland as it typically does, which is expected to result in the more widespread coverage of showers and thunderstorms to occur across Southeast Florida. Some storms will be capable of producing strong wind gusts as high as 40- 50 mph but severe parameters are rather limited for this end of of week time period. Main concerns will be for heavy rainfall lowering visibilities on roadways, strong wind gusts and localized flooding as a result of training storms or convection re-developing over the same locations. In terms of heat, it should not be quite as hot as the last couple of days given the dust plume dissipating. However, with deeper moisture arriving there will still be dew points in the upper 70s for most of the region and high temps achieving the low to mid 90s prior to rain occurring across the region in the afternoon. Therefore, opting to go with a Heat Advisory again for today from 11AM - 6PM for all of South Florida. If rainfall becomes widespread earlier than 6PM and causes sudden decreases in heat levels, then this advisory could be canceled prior to 6PM. Long Term (Friday night through Wednesday) Issued at 109am EDT Thu August 20 2026 The extended period will see a much needed return to a more typical summertime pattern. An upper level ridge will remain anchored over the western US while the eastern US will remain under the influence of a mid-level trough set up across most of the Eastern Seaboard through at least early next week. Expect mainly diurnally driven sea- breeze convection each day with seasonable Probability of Precipitation (40-60%) favoring the afternoon and early evening hours, and then widely scattered coastal showers during the overnight period. Highest rain chances and most widespread coverage is expected across interior South Florida where the sea breezes and outflow boundaries collide. Temperatures will remain above normal through the weekend and into early next week. Max heat indices will remain around advisory criteria each day, so additional heat headlines will remain possible. Marine Issued at 109am EDT Thu August 20 2026 Gentle west-northwest winds expected across the Gulf waters today with southerly winds across the Atlantic. These winds are expected to shift a little more southwesterly for the Gulf and southeasterly for the Atlantic on Friday. Seas will remain at 1-2 feet or less. Scattered showers and thunderstorms are possible late each day and in the late night hours which may result in locally hazardous winds and seas. NOAA Miami FL Office: Watches - Warnings - Advisories FL... Heat Advisory from 11am this morning to 6pm EDT this evening for FLZ063-066>075-168-172>174. AM...None. GM...None. |
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