Marine Weather and Tide Forecast for Callahan, FL

NEAR TERM
(Today and Tonight)...

A fast-moving backdoor cool front has pushed south of the forecast area this morning with breezy northeasterly winds ushered in behind it. These winds will not be as strong as last week's Nor'easter event but gusts up to 25 mph at the immediate beaches will be possible this afternoon. Increasing winds may slightly increase the low-end Minor tidal flooding within the St Johns River through today (more on this in the HYDRO section below). Patchy morning fog could develop where winds have already decoupled but widespread dense fog is unlikely.

Outside of the breeziness, a tranquil day is expect for the middle of meteorological Autumn. Highs will push into the 80s inland while the cooler onshore flow keeps coastal areas in the upper 70s. Not much change tonight. Mostly clear skies will allow for excellent cooling and let lows fall toward the mid/upper 50s for interior SE GA and the Suwannee River valley while other areas fall to the low 60s. The coast will be the warm region with lows in the upper 60s to near 70.

SHORT TERM
(Thursday through Friday night)

Ridging will extend across the region, from a high centered over the Great Lakes region through Friday. Coastal troughing will be in place in the northeast flow pattern around the high, leading to elevated and gusty coastal winds. The high center will gradually move more toward the northeast into Friday night. The coastal trough is expected to dissipated Friday night, with onshore flow becoming more from the east and decreasing.

This will be a dry period with temperatures trending near to a little below seasonal averages.



LONG TERM
(Saturday through Tuesday)

The high pressure ridge will move off the east coast Saturday. It will be another dry day, with the flow gradually coming more from the southeast through the day. Highs Saturday will be near normal.

A cold front will approach far inland areas Saturday night, then across region Sunday through Sunday night. A round of showers with a few embedded thunderstorms are expected to accompany this passage.
At this point stronger storms are not expected, as the best upper support will be north of the area. Southerly flow ahead of the boundary, will yield above normal temperatures for Sunday.

High pressure will build across the southeastern US early next week, with dry weather, and temperatures near seasonal levels.

AVIATION
(06Z TAFS)

Cool front will bring a breezy northeasterly wind to all terminals today with VFR skies. There could be a few bouts of MVFR based stratocumulus for coastal terminals but prevailing conditions are not likely.

MARINE

Northeasterly winds developing across the waters this morning will persist through the end of the week. Small Craft Exercise Caution will continue across the waters today and likely on Thursday. Rising seas has prompted a Small Craft Advisory across the offshore waters beginning this afternoon. Elevated seas will persist through at least Friday morning before winds veer southerly ahead on an incoming cold front. This cold front is expected to move over the waters Monday with high pressure building in behind it from the west.

HYDROLOGY

Breezy onshore flow will flatten out and at least slightly reverse the downward trend in high tide levels within the middle St Johns River (south of Jacksonville) today. Minor flooding will be possible with both high tides today and possibly through the end of the week as mild onshore flow persists. Southerly flow this weekend will lead to lower tidal levels.

PRELIMINARY POINT TEMPS/POPS
AMG 82 56 82 53 / 0 0 0 0 SSI 77 64 76 63 / 0 0 0 0 JAX 80 61 81 60 / 0 0 0 0 SGJ 79 67 79 67 / 10 0 0 0 GNV 83 59 84 59 / 0 0 0 0 OCF 83 61 84 61 / 0 0 0 0

JAX WATCHES/WARNINGS/ADVISORIES
FL...Coastal Flood Advisory until 6 AM EDT Thursday for FLZ038-132- 137-138-333-633.

High Rip Current Risk through late Thursday night for FLZ124-125- 138-233-333.

GA...High Rip Current Risk through late Thursday night for GAZ154-166.

AM...Small Craft Advisory from 1 PM this afternoon to 8 AM EDT Friday for AMZ470-472-474.