Marine Weather and Tide Forecast for St. Marks, FL
May 18, 2024 5:15 AM EDT (09:15 UTC) Change Location
 | Sunrise 6:39 AM Sunset 8:27 PM Moonrise 3:10 PM Moonset 2:51 AM |
GMZ730 Apalachee Bay Or Coastal Waters From Keaton Beach To Ochlockonee River Fl Out To 20 Nm- Coastal Waters From Mexico Beach To Okaloosa Walton County Line Fl Out 20 Nm- Coastal Waters From Mexico Beach To Apalachicola Fl Out 20 Nm- Coastal Waters From Ochlockonee River To Apalachicola Fl Out To 20 Nm- Coastal Waters From Suwannee River To Keaton Beach Fl Out 20 Nm- Waters From Mexico Beach To Okaloosa Walton County Line Fl From 20 To 60 Nm- Waters From Apalachicola To Mexico Beach Fl From 20 To 60 Nm- Waters From Suwannee River To Apalachicola Fl From 20 To 60 Nm- 352 Am Edt Sat May 18 2024 /252 Am Cdt Sat May 18 2024/
Today - Southwest winds 10 to 15 knots. Seas 2 to 4 feet. Wave detail: south 3 feet at 7 seconds. Protected waters a moderate chop. A chance of Thunderstorms early this morning. A chance of showers this morning. Thunderstorms likely this afternoon. Showers likely early this afternoon, then a chance of showers late.
Tonight - Southwest winds around 10 knots. Seas 2 to 3 feet. Wave detail: south 3 feet at 7 seconds. Protected waters a light chop. Showers likely. Thunderstorms likely.
Sunday - West winds 5 to 10 knots. Seas 2 to 3 feet. Wave detail: south 3 feet at 7 seconds and west 1 foot at 4 seconds. Protected waters a light chop. A chance of showers with a slight chance of Thunderstorms.
Sunday night - West winds 5 to 10 knots. Seas 2 to 3 feet. Wave detail: south 3 feet at 7 seconds. Protected waters a light chop. A slight chance of showers and Thunderstorms.
Monday - Northeast winds 5 to 10 knots. Seas 2 to 3 feet. Wave detail: south 3 feet at 7 seconds. Protected waters a light chop.
Monday night - Northwest winds around 5 knots, becoming northeast after midnight. Seas around 2 feet. Wave detail: southwest 2 feet at 7 seconds and northeast 1 foot at 2 seconds. Protected waters a light chop.
Tuesday - East winds 5 to 10 knots. Seas around 2 feet. Protected waters a light chop.
Tuesday night - East winds 5 to 10 knots. Seas around 2 feet in the evening, then 1 foot or less. Protected waters a light chop.
Wednesday - Southeast winds 5 to 10 knots. Waves 1 foot or less. Protected waters a light chop.
Wednesday night - South winds 5 to 10 knots. Waves 1 foot or less. Protected waters a light chop.
winds and waves higher in and near Thunderstorms.
winds and waves higher in and near Thunderstorms.
GMZ700 Synopsis For The Suwannee River To Okaloosa-walton County Line Out To 60 Nm 352 Am Edt Sat May 18 2024
Synopsis - A line of Thunderstorms is likely to move across the waters this morning and evening, bringing strong to severe wind gusts. A weak front will move across the waters today and tonight, and stall on Sunday, bringing renewed chances of showers and Thunderstorms. High pressure will pass across the northeast gulf on Sunday night, and then elongate along the u.s. Eastern seaboard on Monday and Tuesday allowing for more favorable boating conditions.
Area Discussion for - Tallahassee, FL
HIDE HelpNOTE: mouseover dotted underlined text for definition
FXUS62 KTAE 180752 AFDTAE
Area Forecast Discussion National Weather Service Tallahassee FL 352 AM EDT Sat May 18 2024
New NEAR TERM, SHORT TERM, LONG TERM, MARINE, FIRE WEATHER, HYDROLOGY
NEAR TERM
(Today and tonight)
Issued at 349 AM EDT Sat May 18 2024
One more potential round of severe weather is on tap for this morning and afternoon as we watch the last of a series of disturbances over the last few days finally push through. As of 3am ET showers and thunderstorms were already beginning to develop well off to our west and northwest in southern Louisiana and Mississippi as the shortwave ejects east out of the mid-level trough currently over Arkansas. All these are expected to continue east through the morning and afternoon and bring widespread showers and storms to the forecast area across southeast Alabama, southwest Georgia, the Florida Panhandle and the Big Bend. Surface instability is somewhat lacking currently but plenty of elevated instability is currently in place as evidenced by convection quickly developing to our west as the forcing arrives.
The main challenge this morning and afternoon is the convection evolution. Currently, fairly stable surface conditions are in place thanks to a large outflow boundary from Friday evening storms, but this boundary has largely stopped it's southward progression and across the Panhandle is already starting to lift back north with a more unstable airmass moving in. This is evident by looking at surface obs further west where surface dewpoints are in the upper 70s compared to the low 70s near TLH. As the forcing moves east this morning, we should see a gradual uptick in the coverage of storms. The severe threat these pose will be questionable given the lack of surface based storms overland currently, but with heating of the day and increasing coverage, a gradual uptick in severe probabilities is expected as storms move into the eastern portions of the Panhandle and southwest Georgia around mid-morning. Storms generally get to Big Bend and south- Georgia late this morning and into the early afternoon hours and this is likely when severe probabilities will be their highest (pending a failure mode below not happening).
One potential failure mode for severe weather developing today would be to keep an eye on storms currently across southern Louisiana. With the better surface instability still across the Gulf waters, it's possible the storms ongoing there could throw off a lot of cloud cover and potentially limit low-level instability that can develop across our area later this morning and into the afternoon. Regardless, even if these lower the threat for severe weather, the strong shortwave rotating through and elevated instability should at least pose some threat for isolated damaging wind and/or hail today should the greater instability not develop.
Additionally, precipitable waters remaining high will bring a risk for localized flood due to high rainfall rates in any storms, especially if those storms traverse over areas that received high rainfall amounts on Friday.
SHORT TERM
(Sunday through Monday night)
Issued at 349 AM EDT Sat May 18 2024
An upper level trough will be exiting the region on Sunday with the last of the remaining showers and thunderstorms clearing out through the day. There is a 40%-70% chance for showers and thunderstorms on Sunday however; some storms may be strong to severe for the eastern Big Bend counties and along the I-75 corridor, as it will be warm with dew points in the 70s, and remaining instability. The SPC has highlighted the extreme SE Big Bend in a Marginal (level 1 of 5) Risk for severe storms. Cooler air aloft is expected to filter in by the afternoon from the northwest. Upper level ridging will begin building in the west Sunday afternoon into Monday. PoPs on Monday will be limited to the I-75 corridor at around 35% as a shortwave passes through.
Temperatures for the short term will have highs in the upper 80s to around 90 degrees. Because of the northerly flow, our GA counties may only reach the mid-80s for highs for Sunday and Monday. Overnight lows will be in the mid 60s.
LONG TERM
(Tuesday through Friday)
Issued at 349 AM EDT Sat May 18 2024
Upper level ridging builds through the week, allowing for warming temperatures and mostly dry weather. Highs will be in the low 90s with overnight lows in the mid to upper 60s.
AVIATION
(06Z TAFS)
Issued at 214 AM EDT Sat May 18 2024
MVFR/IFR conditions prevail through daybreak as low stratus from previous rains linger. Through today, expect conditions to improve to MVFR and possibly VFR at more eastern terminals near VLD, while our more western terminals at ECP/DHN likely remain MVFR/IFR through much of the morning and early afternoon. Attention turns to another round of strong to severe storms that approach from the west by 10z-12z at ECP/DHN. These spread east through the morning bringing localized IFR visibilities along with the potential for localized 30 to 40 knot wind gusts. Rain will linger after severe storms go through with IFR/MVFR conditions lingering into the evening and possibly overnight hours.
MARINE
Issued at 349 AM EDT Sat May 18 2024
A line of thunderstorms is likely to move across the waters this morning and evening, bringing strong to severe wind gusts. A weak front will move across the waters today and tonight, and stall on Sunday, bringing renewed chances of showers and thunderstorms.
High pressure will pass across the northeast Gulf on Sunday night, and then elongate along the U.S. Eastern Seaboard on Monday and Tuesday allowing for more favorable boating conditions.
FIRE WEATHER
Issued at 349 AM EDT Sat May 18 2024
Fire weather concerns will be low through the beginning of next week. This is mostly due to the wet pattern we're currently in.
While rain chances lessen Sunday and into early next week, the widespread rainfall totals from the weekend will likely have been around 1 to 3 inches which is well above normal for this time of year and no significantly dry air mass is expected into much of next week.
HYDROLOGY
Issued at 349 AM EDT Sat May 18 2024
A Flash Flood Watch remains in effect for the entire region except the SE Big Bend in FL, Lowndes and Lanier Counties in GA, through 4 PM EDT / 3 PM CDT Saturday. Another 1-2 inches is expected with localized higher amounts possible. Due to already saturated soils, flash flooding will be a concern with training thunderstorms. The region along and west of the Apalachicola River Basin is highlighted in a Slight (level 2 of 4) risk for excessive rainfall today, while areas to the east are covered in a Marginal (level 1 of 4) risk for excessive rainfall.
The Withlacoochee River at Valdosta (Skipper Bridge Road) and Quitman as well, as the Ochlockonee River at Concord, continue in minor flood stage.
SPOTTER INFORMATION STATEMENT
Spotter activation is requested. Spotters should safely report significant weather conditions and/or damage by calling the office or tweeting us @NWSTallahassee.
PRELIMINARY POINT TEMPS/POPS
Tallahassee 80 68 87 67 / 80 40 40 10 Panama City 78 70 85 69 / 90 40 10 0 Dothan 78 66 85 66 / 100 30 20 0 Albany 78 66 83 65 / 90 30 40 10 Valdosta 83 68 86 67 / 80 60 60 20 Cross City 87 69 86 67 / 50 70 60 20 Apalachicola 80 71 84 71 / 80 60 20 10
TAE WATCHES/WARNINGS/ADVISORIES
FL...Flood Watch through this evening for FLZ007>018-026-027-108-112- 114-115-118-127.
High Rip Current Risk through late Sunday night for FLZ108-112- 114-115.
GA...Flood Watch through this evening for GAZ120>131-142>148-155>159.
AL...Flood Watch through this evening for ALZ065>069.
GM...None.
Area Forecast Discussion National Weather Service Tallahassee FL 352 AM EDT Sat May 18 2024
New NEAR TERM, SHORT TERM, LONG TERM, MARINE, FIRE WEATHER, HYDROLOGY
NEAR TERM
(Today and tonight)
Issued at 349 AM EDT Sat May 18 2024
One more potential round of severe weather is on tap for this morning and afternoon as we watch the last of a series of disturbances over the last few days finally push through. As of 3am ET showers and thunderstorms were already beginning to develop well off to our west and northwest in southern Louisiana and Mississippi as the shortwave ejects east out of the mid-level trough currently over Arkansas. All these are expected to continue east through the morning and afternoon and bring widespread showers and storms to the forecast area across southeast Alabama, southwest Georgia, the Florida Panhandle and the Big Bend. Surface instability is somewhat lacking currently but plenty of elevated instability is currently in place as evidenced by convection quickly developing to our west as the forcing arrives.
The main challenge this morning and afternoon is the convection evolution. Currently, fairly stable surface conditions are in place thanks to a large outflow boundary from Friday evening storms, but this boundary has largely stopped it's southward progression and across the Panhandle is already starting to lift back north with a more unstable airmass moving in. This is evident by looking at surface obs further west where surface dewpoints are in the upper 70s compared to the low 70s near TLH. As the forcing moves east this morning, we should see a gradual uptick in the coverage of storms. The severe threat these pose will be questionable given the lack of surface based storms overland currently, but with heating of the day and increasing coverage, a gradual uptick in severe probabilities is expected as storms move into the eastern portions of the Panhandle and southwest Georgia around mid-morning. Storms generally get to Big Bend and south- Georgia late this morning and into the early afternoon hours and this is likely when severe probabilities will be their highest (pending a failure mode below not happening).
One potential failure mode for severe weather developing today would be to keep an eye on storms currently across southern Louisiana. With the better surface instability still across the Gulf waters, it's possible the storms ongoing there could throw off a lot of cloud cover and potentially limit low-level instability that can develop across our area later this morning and into the afternoon. Regardless, even if these lower the threat for severe weather, the strong shortwave rotating through and elevated instability should at least pose some threat for isolated damaging wind and/or hail today should the greater instability not develop.
Additionally, precipitable waters remaining high will bring a risk for localized flood due to high rainfall rates in any storms, especially if those storms traverse over areas that received high rainfall amounts on Friday.
SHORT TERM
(Sunday through Monday night)
Issued at 349 AM EDT Sat May 18 2024
An upper level trough will be exiting the region on Sunday with the last of the remaining showers and thunderstorms clearing out through the day. There is a 40%-70% chance for showers and thunderstorms on Sunday however; some storms may be strong to severe for the eastern Big Bend counties and along the I-75 corridor, as it will be warm with dew points in the 70s, and remaining instability. The SPC has highlighted the extreme SE Big Bend in a Marginal (level 1 of 5) Risk for severe storms. Cooler air aloft is expected to filter in by the afternoon from the northwest. Upper level ridging will begin building in the west Sunday afternoon into Monday. PoPs on Monday will be limited to the I-75 corridor at around 35% as a shortwave passes through.
Temperatures for the short term will have highs in the upper 80s to around 90 degrees. Because of the northerly flow, our GA counties may only reach the mid-80s for highs for Sunday and Monday. Overnight lows will be in the mid 60s.
LONG TERM
(Tuesday through Friday)
Issued at 349 AM EDT Sat May 18 2024
Upper level ridging builds through the week, allowing for warming temperatures and mostly dry weather. Highs will be in the low 90s with overnight lows in the mid to upper 60s.
AVIATION
(06Z TAFS)
Issued at 214 AM EDT Sat May 18 2024
MVFR/IFR conditions prevail through daybreak as low stratus from previous rains linger. Through today, expect conditions to improve to MVFR and possibly VFR at more eastern terminals near VLD, while our more western terminals at ECP/DHN likely remain MVFR/IFR through much of the morning and early afternoon. Attention turns to another round of strong to severe storms that approach from the west by 10z-12z at ECP/DHN. These spread east through the morning bringing localized IFR visibilities along with the potential for localized 30 to 40 knot wind gusts. Rain will linger after severe storms go through with IFR/MVFR conditions lingering into the evening and possibly overnight hours.
MARINE
Issued at 349 AM EDT Sat May 18 2024
A line of thunderstorms is likely to move across the waters this morning and evening, bringing strong to severe wind gusts. A weak front will move across the waters today and tonight, and stall on Sunday, bringing renewed chances of showers and thunderstorms.
High pressure will pass across the northeast Gulf on Sunday night, and then elongate along the U.S. Eastern Seaboard on Monday and Tuesday allowing for more favorable boating conditions.
FIRE WEATHER
Issued at 349 AM EDT Sat May 18 2024
Fire weather concerns will be low through the beginning of next week. This is mostly due to the wet pattern we're currently in.
While rain chances lessen Sunday and into early next week, the widespread rainfall totals from the weekend will likely have been around 1 to 3 inches which is well above normal for this time of year and no significantly dry air mass is expected into much of next week.
HYDROLOGY
Issued at 349 AM EDT Sat May 18 2024
A Flash Flood Watch remains in effect for the entire region except the SE Big Bend in FL, Lowndes and Lanier Counties in GA, through 4 PM EDT / 3 PM CDT Saturday. Another 1-2 inches is expected with localized higher amounts possible. Due to already saturated soils, flash flooding will be a concern with training thunderstorms. The region along and west of the Apalachicola River Basin is highlighted in a Slight (level 2 of 4) risk for excessive rainfall today, while areas to the east are covered in a Marginal (level 1 of 4) risk for excessive rainfall.
The Withlacoochee River at Valdosta (Skipper Bridge Road) and Quitman as well, as the Ochlockonee River at Concord, continue in minor flood stage.
SPOTTER INFORMATION STATEMENT
Spotter activation is requested. Spotters should safely report significant weather conditions and/or damage by calling the office or tweeting us @NWSTallahassee.
PRELIMINARY POINT TEMPS/POPS
Tallahassee 80 68 87 67 / 80 40 40 10 Panama City 78 70 85 69 / 90 40 10 0 Dothan 78 66 85 66 / 100 30 20 0 Albany 78 66 83 65 / 90 30 40 10 Valdosta 83 68 86 67 / 80 60 60 20 Cross City 87 69 86 67 / 50 70 60 20 Apalachicola 80 71 84 71 / 80 60 20 10
TAE WATCHES/WARNINGS/ADVISORIES
FL...Flood Watch through this evening for FLZ007>018-026-027-108-112- 114-115-118-127.
High Rip Current Risk through late Sunday night for FLZ108-112- 114-115.
GA...Flood Watch through this evening for GAZ120>131-142>148-155>159.
AL...Flood Watch through this evening for ALZ065>069.
GM...None.
toggle option: (graph/table)
| Airport | Dist | Age | Wind kt | Vis | Sky | Weather | Temp | DewPt | RH | inHg |
| KFPY PERRYFOLEY,FL | 22 sm | 20 min | S 06 | 7 sm | Overcast | 79°F | 77°F | 94% | 29.91 |
Aucilla River entrance
Click for Map
Sat -- 03:51 AM EDT Moonset
Sat -- 05:42 AM EDT 1.13 feet Low Tide
Sat -- 06:40 AM EDT Sunrise
Sat -- 12:08 PM EDT 2.89 feet High Tide
Sat -- 04:10 PM EDT Moonrise
Sat -- 06:33 PM EDT 0.87 feet Low Tide
Sat -- 08:24 PM EDT Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Click for Map
Sat -- 03:51 AM EDT Moonset
Sat -- 05:42 AM EDT 1.13 feet Low Tide
Sat -- 06:40 AM EDT Sunrise
Sat -- 12:08 PM EDT 2.89 feet High Tide
Sat -- 04:10 PM EDT Moonrise
Sat -- 06:33 PM EDT 0.87 feet Low Tide
Sat -- 08:24 PM EDT Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Aucilla River entrance, Florida, Tide feet
| 12 am |
| 2.4 |
| 1 am |
| 2.3 |
| 2 am |
| 2 |
| 3 am |
| 1.7 |
| 4 am |
| 1.4 |
| 5 am |
| 1.2 |
| 6 am |
| 1.1 |
| 7 am |
| 1.3 |
| 8 am |
| 1.6 |
| 9 am |
| 2 |
| 10 am |
| 2.4 |
| 11 am |
| 2.7 |
| 12 pm |
| 2.9 |
| 1 pm |
| 2.8 |
| 2 pm |
| 2.5 |
| 3 pm |
| 2 |
| 4 pm |
| 1.5 |
| 5 pm |
| 1.1 |
| 6 pm |
| 0.9 |
| 7 pm |
| 0.9 |
| 8 pm |
| 1.1 |
| 9 pm |
| 1.5 |
| 10 pm |
| 1.9 |
| 11 pm |
| 2.3 |
St. Marks River Entrance
Click for Map
Sat -- 03:52 AM EDT Moonset
Sat -- 05:37 AM EDT 1.23 feet Low Tide
Sat -- 06:41 AM EDT Sunrise
Sat -- 12:05 PM EDT 3.11 feet High Tide
Sat -- 04:10 PM EDT Moonrise
Sat -- 06:28 PM EDT 0.94 feet Low Tide
Sat -- 08:25 PM EDT Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Click for Map
Sat -- 03:52 AM EDT Moonset
Sat -- 05:37 AM EDT 1.23 feet Low Tide
Sat -- 06:41 AM EDT Sunrise
Sat -- 12:05 PM EDT 3.11 feet High Tide
Sat -- 04:10 PM EDT Moonrise
Sat -- 06:28 PM EDT 0.94 feet Low Tide
Sat -- 08:25 PM EDT Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
St. Marks River Entrance, Florida, Tide feet
| 12 am |
| 2.6 |
| 1 am |
| 2.4 |
| 2 am |
| 2.2 |
| 3 am |
| 1.8 |
| 4 am |
| 1.5 |
| 5 am |
| 1.3 |
| 6 am |
| 1.2 |
| 7 am |
| 1.4 |
| 8 am |
| 1.8 |
| 9 am |
| 2.2 |
| 10 am |
| 2.6 |
| 11 am |
| 3 |
| 12 pm |
| 3.1 |
| 1 pm |
| 3 |
| 2 pm |
| 2.7 |
| 3 pm |
| 2.2 |
| 4 pm |
| 1.6 |
| 5 pm |
| 1.2 |
| 6 pm |
| 1 |
| 7 pm |
| 1 |
| 8 pm |
| 1.2 |
| 9 pm |
| 1.6 |
| 10 pm |
| 2.1 |
| 11 pm |
| 2.5 |
Tallahassee, FL,
NOTICE: Some pages have affiliate links to Amazon. As an Amazon Associate, I earn from qualifying purchases. Please read website Cookie, Privacy, and Disclamers by clicking HERE. To contact me click HERE. For my YouTube page click HERE