Apalachee Bay and Coastal Waters From Keaton Beach to Ochlockonee River FL out 20 NM Marine Forecast
| Rest Of Today...West Winds 10 To 15 Knots. Seas Around 2 Feet. Wave Detail: West 2 Feet At 4 Seconds. Protected Waters A Moderate Chop. A Chance Of Showers And A Slight Chance Of Thunderstorms. |
| Tonight...West Winds 10 To 15 Knots. Seas Around 2 Feet. Wave Detail: West 2 Feet At 4 Seconds. Protected Waters A Moderate Chop. A Slight Chance Of Showers After Midnight. |
| Thursday...West Winds 10 To 15 Knots. Seas Around 2 Feet. Wave Detail: West 2 Feet At 4 Seconds. Protected Waters A Moderate Chop. A Chance Of Showers With A Slight Chance Of Thunderstorms. |
| Thursday Night...West Winds 10 To 15 Knots With Gusts Up To 20 Knots, Diminishing To 5 To 10 Knots After Midnight. Seas Around 2 Feet. Wave Detail: West 2 Feet At 4 Seconds. Protected Waters A Moderate Chop. A Chance Of Showers With A Slight Chance Of Thunderstorms After Midnight. |
| Friday...West Winds 5 To 10 Knots. Seas Around 2 Feet. Wave Detail: West 2 Feet At 4 Seconds. Protected Waters A Light Chop. A Chance Of Showers With A Slight Chance Of Thunderstorms. |
| Friday Night...West Winds 10 To 15 Knots With Gusts Up To 20 Knots, Diminishing To 5 To 10 Knots After Midnight. Seas Around 2 Feet. Wave Detail: West 2 Feet At 4 Seconds. Protected Waters A Moderate Chop. A Slight Chance Of Showers And Thunderstorms In The Evening, Then A Chance Of Showers And Thunderstorms After Midnight. |
| Saturday...West Winds 5 To 10 Knots. Waves 1 Foot Or Less, Then Around 2 Feet In The Afternoon. Protected Waters A Light Chop. A Chance Of Showers And Thunderstorms. |
| Saturday Night...West Winds 5 To 10 Knots. Seas Around 2 Feet. Protected Waters A Light Chop. A Slight Chance Of Showers And Thunderstorms In The Evening, Then A Chance Of Showers And Thunderstorms After Midnight. |
| Sunday...West Winds 5 To 10 Knots. Seas Around 2 Feet. Protected Waters A Light Chop. A Chance Of Showers And Thunderstorms. |
| Sunday Night...Southwest Winds 5 To 10 Knots. Seas Around 2 Feet. Protected Waters A Light Chop. A Slight Chance Of Showers And Thunderstorms. Winds And Waves Higher In And Near Thunderstorms. |
| Area Forecast Discussion National Weather Service Tallahassee FL 1028am EDT Wednesday August 19 2026 ...New UPDAT Marine .KEY MESSAGES... Issued at 1027am EDT Wednesday August 19 2026 - Long-duration hazardous heat wave continues for much of this week. Heat products will keep being issued accordingly. Very warm nighttime temperatures offer little relief. Please exercise heat safety: www.weather.gov/safety/heat. - Daily chances for thunderstorms remain in the forecast. Strong- gusty winds, frequent lightning and locally heavy rain are the main threats. Highest rain chances are Friday-Saturday. - The heat wave is poised to break late this week or early weekend, which likely opens the door for convectively active weather. A more typical summertime pattern returns early next week. Issued at 1027am EDT Wednesday August 19 2026 The forecast is on track, and no updates are needed this morning. .SHORT TERM... (Today and Tonight) Issued at 253am EDT Wednesday August 19 2026 The main change from yesterday afternoon's forecast package was to extend the Heat Advisory to Geneva & Houston County, AL for heat indices between 108 and 112 degrees. Relatively drier air to the north behind a frontal boundary fosters lower heat indices for most of SW GA and the remainder of our SE AL counties. High temperatures in the mid to upper 90s are forecast with isolated 100 degrees possible (e.g., Tallahassee). Overnight lows drop to the mid/upper 70s. Another round of thunderstorms are on tap this afternoon and focus along/south of the FL state line from the seabreeze and subsequent boundary collisions, followed by gradual diminishing after sunset. Convection also attempts to spread from the Suwannee Valley into the Eastern FL Big Bend this evening. High instability, Precipitable Water of 2+ inches, and some dry air aloft supports strong-gusty winds, frequent lightning, and locally heavy rain. Isolated severe gusts/downbursts are possible as well. Long Term (Thursday through Tuesday) Issued at 253am EDT Wednesday August 19 2026 An upper level vorticity lobe pinches off over the NE Gulf and serves as a forcing mechanisms for morning maritime convection on Thursday that then spreads into the Eastern FL Big Bend during the afternoon. Thunderstorms will continue to pose the usual threats we've been advertising the past several days. A frontal boundary attendant to a northern stream trough creates a north- south moisture gradient, such that hazardous heat focuses most along/south of the FL state line. Friday and Saturday sees the highest convective coverage of the period as the Eastern US upper trough sharpens further and strong ridge shifts westward. The combination of the associated front sagging deeper into the region, height falls, and high instability supports elevated rain chances while effectively breaking this long- duration heat wave. The trough lifts to our NE on Sunday, so rain chances decrease in response. Starting next week, we return to a more typical summertime weather pattern. Highs in the 90s and lows in the 70s will be common. Widespread triple digit heat indices stick around, but less oppressive. Marine Issued at 1027am EDT Wednesday August 19 2026 High pressure centered over the Southeast Gulf will maintain gentle to moderate westerly breezes through this weekend. Scattered thunderstorms will be prone to strong, erratic wind gusts and lightning. Fire Weather Issued at 253am EDT Wednesday August 19 2026 The main fire concerns continue to be hazardous heat conditions persisting into late week and daily chances for afternoon thunderstorms. The heat wave begins to abate heading into the weekend. High temperatures well into the 90s will be common with heat indices of 105 to 112+ degrees. Thunderstorms will be capable of frequent lightning, gusty/erratic winds, and locally wetting rains are additional threats. Prevailing west to NW winds are forecast outside of daily afternoon seabreezes across our Florida counties. The heat and thunderstorm activity should be greatest across the FL zones. Highest rain chances are Friday and Saturday when a frontal boundary sags into the region. Hydrology Issued at 253am EDT Wednesday August 19 2026 Thunderstorms will be capable of producing localized nuisance flooding in urban, poor-drainage, and low-lying areas. Otherwise, there are no significant hydrological concerns the next several days. All area rivers are currently running well below action stage. NOAA Tallahassee FL Office: Watches - Warnings - Advisories FL... Heat Advisory until 8pm EDT /7pm CDT/ this evening for FLZ007>019-027>029-034-108-112-114-115-118-127-128-134-326- 426. High Rip Current Risk through late tonight for FLZ114. GA... Heat Advisory until 8pm EDT this evening for GAZ155>161. AL... Heat Advisory until 7pm CDT this evening for ALZ068-069. GM...None. |
Tallahassee FL Radar
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