textproduct: Jacksonville

KEY MESSAGES

For the latest NE FL and SE GA Daily Key Messages please visit: https:/www.weather.gov/media/jax/briefings/nws-jax-briefing.pdf

- Small Craft Advisory Conditions Friday Night

- Patchy Frost Expected Across Inland SE GA and Suwannee Valley on Sunday Morning

- Increasing Marine and Coastal Hazards Next Week. Gale Force Winds, Gusty Northeast Winds, and High Rip Current

NEAR TERM /THROUGH TONIGHT/

Main Highlights Today and Tonight:

- Cooler and Drier Friday Following Frontal Passage

Another cold front will push across the area on Friday, clearing south of the area by Friday Night, with high pressure building towards the southeastern US on Saturday. Temperatures Friday will be cooler, highs only reaching the 60s for most of the area, near 70 for the north central Florida area. Breezier northwesterly winds continue, with clearing skies throughout the day. A steep drop in low temperatures is forecast, with lows falling into the upper 30s for inland southeast Georgia and the Suwannee valley, lower to mid 40s elsewhere, not quite cold enough for frost yet.

SHORT TERM /SATURDAY THROUGH SUNDAY NIGHT/

Main Highlights This Period: sat-sun

- Colder and Drier Conditions this the Weekend - Wind Chills Drop into the 30s Saturday and Sunday Mornings. - Inland Frost Potential for Southeast GA and the Suwannee Valley Early on Sunday Morning.

Surface high pressure over the northern MS river valley strengthens as it builds southeastward this weekend. Breezy NNW flow will continue to funnel cold, dry air across the region. Despite plenty of sunshine, highs will only rise into the upper 50s to low 60s on Saturday. Winds decrease Saturday night allowing for winds to decouple and radiational cooling to take hold. Lows Saturday night into Sunday morning will likely fall to the mid and upper 30s across inland SE GA and Suwannee Valley, with the potential for near freezing temperatures for areas north of Alma. This set-up will likely create the first frost of the season with patchy to areas of frost across inland SE GA and Suwannee Valley. Lows elsewhere will fall to the 40s. On Sunday, strong high pressure begins to wedge down the southeastward seaboard developing NE flow. With the flow shifting to onshore, temperatures will begin to gradually bounce back. Highs on Sunday will remain in the 60s, except lower 70s for portions of north central FL. Sunday night lows will range from the upper 30s and 40s inland to the 50s closer to the coast.

LONG TERM /MONDAY THROUGH THURSDAY/

Main Highlights This Period: mon-thu

- Seasonably Cool and Dry Weather into Early Next Week. - Increasing Coastal and Marine Hazards Forecast Next Week.

Breezy NE flow develops next week as strong high pressure builds into the mid-Atlantic region and wedges down the southeastern seaboard. In the upper levels, a shortwave trough passes across the SE US early next week and could potentially develop a weak surface low in the Gulf and track across south FL but there still remains a bit of uncertainty. The development of this low could tighten the local gradient leading to potential windy conditions mid-week next week. Showers return to mainly coastal locations on Tuesday and Wednesday with an influx in low-level moisture from the onshore flow and assistance from the passing upper shortwaves. The prolonged onshore flow will cause temperatures to warm to seasonable by the latter half of the week.

AVIATION /12Z FRIDAY THROUGH 12Z SATURDAY/

VFR conditions prevail through the period. Breezy northwesterly winds develop behind the frontal passage on Friday with gusts nearing 20 knots after 16z.

MARINE

A brief lull in the offshore flow is expected on Friday, before another strong surge of Northwest to North winds develops Friday Night with advisory conditions lasting through at least Saturday morning over the local waters. Winds and seas will briefly subside on Saturday as surface high pressure builds into the region, before breezy northeast winds develop Sunday and increase to Small Craft Advisory levels early next week as high pressure builds to the north and low pressure tracks well south of the local waters.

Rip Currents: Strong offshore winds developing Today and remaining in place through Saturday should yield a low risk of rip currents. Northeasterly winds developing by Sunday and into early next week will lead to a return to an elevated risk of rip currents.

FIRE WEATHER

- High Daytime Dispersions For Se Ga And Inland Ne Fl Today ELEVATED NIGHTTIME DISPERSION VALUES AT COASTAL LOCATIONS - Tonight

A much cooler and drier air mass will overspread our area today and into the weekend. Breezy northwesterly surface and transport winds today will yield high daytime dispersions for southeast Georgia and much of inland northeast Florida. Min RHs will be in the 30s today and Saturday. Breezy transport speeds persist tonight at coastal locations, where elevated nighttime dispersion values are forecast. Surface and transport winds will then shift to northerly on Saturday bringing very good dispersions. Winds decrease and shift to northeasterly by Sunday gradually increasing moisture to the area. Fair to good daytime dispersions are expected region-wide on Sunday.

FOG POTENTIAL AND OTHER WEATHER REMARKS: Significant fog is not expected through the weekend. Patchy to areas of frost formation are possible late Saturday night and early Sunday morning across inland portions of southeast GA, the Suwannee Valley, and portions of inland northeast Florida.

PRELIMINARY POINT TEMPS/POPS

AMG 63 37 59 34 / 0 0 0 0 SSI 67 44 62 44 / 0 0 0 0 JAX 69 41 62 41 / 0 0 0 0 SGJ 70 45 62 48 / 0 0 0 0 GNV 69 41 61 39 / 0 0 0 0 OCF 71 41 62 40 / 0 0 0 0

JAX WATCHES/WARNINGS/ADVISORIES

FL...None. GA...None. MARINE...Small Craft Advisory from 6 PM this evening to 8 AM EST Saturday for AMZ450-452-454-470-472-474.