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

- Oppressive Heat & Humidity Continues Area -Wide. For Today, Extreme Heat Warning for Coastal Southeast GA and Heat Advisory elsewhere. Daily Heat Advisories Likely Continue for Much of Our Area into Next Week.

- A Few Strong Thunderstorms this Afternoon/Evening & Saturday. Scattered Thunderstorms Today and Saturday. Isolated strong Damaging Wind Gusts of 40-55 mph, Frequent Lightning Strikes & Heavy Downpours are Possible.

- Daily Scattered Afternoon & Evening thunderstorms Sunday into mid next week.

AVIATION /12Z FRIDAY THROUGH 12Z SATURDAY/

Prevailing VFR conditions forecast through this TAF cycle. The main aviation concern will be thunderstorms this afternoon. Changed the PROB30 groups for TSRA at all terminals based to TEMPO based on higher confidence compared to the 6Z issuance. Future amendments may be necessary depending on convective evolution. Light west winds are on tap (higher and erratic in and around thunderstorms) with a southerly wind at the coastal terminals.

MARINE

A trough of low pressure will develop over the southeast states through the weekend while a high pressure ridge remains positioned over the eastern Gulf and central Florida. This will result in westerly winds during the next several days, with the sea breeze shifting winds to southeast or south over the near shore waters each afternoon, followed by south evening wind surges that may briefly increase speeds to near caution levels before subsiding after midnight. Stronger offshore flow may develop Monday and Tuesday next week. Isolated to scattered mainly afternoon and evening thunderstorms will remain possible each day through the upcoming weekend, and some of the storms will be capable of producing strong gusty winds and locally high seas.

Rip Currents: Prevailing offshore winds and little if any east- southeast swell energy will keep surf heights near or below 2 feet at area beaches. Thus, generally low risk of rip currents through Friday. Only heightened risk of rip currents will be around piers and jetties and also around the times of low tide, which for today and Friday will be around 3 PM to 5 PM. Going into the weekend, there is not much change with low surf heights so the low risk of rips may continue.

FIRE WEATHER

- Heat Headlines in Effect

Hazardous heat and daily afternoon thunderstorms are main fire weather concerns through the weekend. Prevailing west to southwest winds are expected outside of the east-coast seabreeze and erratic directional thunderstorm outflow boundaries. Very warm overnight lows will not provide much relief. However, isolated to scattered afternoon and evening thunderstorms may provide some relief and/or limit the duration of heat index values of advisory level heat indices.

Fog Potential: Significant fog development is not expected. Any late- night or early-morning fog should be shallow and patchy, mainly in areas that receive locally heavy rainfall.

PRELIMINARY POINT TEMPS/POPS

AMG 97 75 96 76 / 50 20 50 10 SSI 95 79 95 80 / 50 10 50 10 JAX 95 76 96 77 / 50 20 60 10 SGJ 94 77 95 77 / 40 10 30 10 GNV 95 74 95 75 / 60 30 30 10 OCF 96 75 96 75 / 50 30 20 10

JAX WATCHES/WARNINGS/ADVISORIES

FL...Heat Advisory from 11 AM this morning to 8 PM EDT this evening for FLZ021-023-024-030-031-035-038-120-124-125-132- 136>138-140-220-225-232-233-236-237-240-322-325-333-340- 422-425-433-522-533-633. GA...Heat Advisory from 11 AM this morning to 8 PM EDT this evening for GAZ132>136-149-151-152-162-163-250-264-350-364. Extreme Heat Warning from 11 AM this morning to 8 PM EDT this evening for GAZ153-154-165-166. MARINE...None.