985 FXUS62 KJAX 101253 AFDJAXArea Forecast Discussion National Weather Service Jacksonville FL 853 AM EDT Wed Sep 10 2025
...New UPDATE...
.UPDATE... Issued at 850 AM EDT Wed Sep 10 2025
For the latest NE FL and SE GA Daily Key Messages please visit: https://www.weather.gov/media/jax/briefings/nws-jax-briefing.pdf
A mid level disturbance and associated deep moisture affecting the northeast FL area yesterday has moved to the northeast. Still quite a bit moisture in the low levels in the broad northeast flow. The high pressure system to the north will continue to build in and increased subsidence aloft due to the departing disturbance will keep most areas dry today and tonight. The exception will be over the south and southeast zones where current isolated shower activity is located. A chance of showers and possible storm there today.
The main updates today were to adjust POPs a bit lower and still keep in some cloudiness across the southeast due to broken sky cover of cumulus/stratocumulus at times. Otherwise, temps will be below due to the lowered thicknesses. Highs mostly in the 80s expected under breezy northeast winds. Breezy winds mainly affect the coastal areas.
On the marine forecast, just adjusted the small craft advisory a bit. The northeast winds and higher seas tend to linger longer and so extended areal and timing extent based on latest guidance.
For coastal flood advisory, we have coastal high tide coming up by late morning about 11 am. We may be able to cancel part of the advisory for southeast GA later today, but will monitor water level trends this morning and new guidance whether that is possible. Overall, latest water level data show values have dropped slightly due to the fact we are moving further away from the full moon from 9/7 and the weaker northeast flow, with most sites below 2 ft MHHW now, except for some tributaries still near or just above 2 ft.
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.NEAR TERM... Issued at 1258 AM EDT Wed Sep 10 2025
High pressure to the north will weaken Today, as the frontal zone to the south sinks a little further south.
Drier air will continue to filter south into the area Today, with the greatest chance for showers with embedded thunderstorms over NE FL. These chances will decrease through the day. A few NE FL coastal showers will be possible Tonight, otherwise a dry night is forecast.
Highs Today will trend a little below normal, with the coolest readings over eastern counties due to cloud cover and rain. For Tonight, the drier air across inland areas will allow for a wide range in temperatures. Lows in the lower 60s over inland SE GA, to the middle 70s coastal NE FL are expected.
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.SHORT TERM... (Thursday through Friday night) Issued at 1258 AM EDT Wed Sep 10 2025
High pressure will build to the north then northeast this period, with the frontal zone well to the south. Weak inverted troughing is expected to develop in the onshore flow pattern over the coastal waters. Convergence associated with this trough will provide for shower chances along the NE FL coast. With fairly dry air located further inland, these showers will dissipate as they move inland. A few thunderstorms may develop during the afternoons over the coastal waters, and affect coastal NE FL.
Temperatures will be a little below normal this period.
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.LONG TERM... (Saturday through Tuesday) Issued at 1258 AM EDT Wed Sep 10 2025
The high will remain centered to the northeast Saturday, as an area of low pressure develops to the southeast of the region. This area of low pressure will track to the east, then northeast of the region over the weekend into early next week. The gradient will tighten between these two features, leading to elevated winds along the coast over the weekend through Monday. Fairly dry air will remain in place inland this period, with the greatest chance for showers being near the NE FL coast. A few diurnal thunderstorms can not be ruled out.
Temperatures will be a little below normal over the weekend, then near normal early next week.
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.AVIATION... (12Z TAFS) Issued at 738 AM EDT Wed Sep 10 2025
Areas of MVFR cigs continue to affect portions of northeast FL today mainly around SGJ with VCSH there too, with other northeast FL sites having occasional MVFR cigs through about 17z today. Otherwise, VFR cigs. Northeasterly winds will prevail once again with gusts 15-20 kts later today and will diminish tonight.
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.MARINE... Issued at 1258 AM EDT Wed Sep 10 2025
High pressure will be north of the area Today, with a frontal boundary to the south. An area of low pressure near the north central FL coast will track away to the east this morning. As this low moves away winds will decrease, but winds will remain somewhat elevated due to pressure gradient between the high and front. High pressure will remain to the north Thursday and northeast Friday. The high will remain to the northeast over the weekend, as an area of low pressure develops to the southeast then east. Winds will pick back up again over the weekend due to gradient between the high and low.
Rip currents: High Risk Today, Moderate to High Thursday.
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.HYDROLOGY... Issued at 1258 AM EDT Wed Sep 10 2025
Will keep the coastal flood advisory in effect through the next few tide cycles, as elevated onshore flow continues.
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.PRELIMINARY POINT TEMPS/POPS... AMG 86 60 88 62 / 0 0 0 0 SSI 83 69 84 71 / 0 0 0 0 JAX 86 67 87 68 / 10 0 0 0 SGJ 84 71 86 73 / 30 10 20 10 GNV 88 68 90 67 / 10 10 10 0 OCF 87 70 87 69 / 30 10 10 0
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.JAX WATCHES/WARNINGS/ADVISORIES... FL...Coastal Flood Advisory until 2 AM EDT Thursday for FLZ124-125- 132-137-138-225-233-325-333-633.
High Rip Current Risk through late tonight for FLZ124-125-138- 233-333.
GA...Coastal Flood Advisory until 2 AM EDT Thursday for GAZ154-166.
High Rip Current Risk through late tonight for GAZ154-166.
AM...Small Craft Advisory until 5 PM EDT this afternoon for AMZ452- 454-470-472-474.
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NWS JAX Office Area Forecast Discussion