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 and Friday, Extreme Heat Warning for Coastal Southeast GA. Daily Heat Advisories Likely Continue for Much of Our Area into Next Week

- A Few Strong Thunderstorms this Afternoon & Evening. Isolated Damaging Wind Gusts of 40-60 mph, Frequent Lightning Strikes & Heavy Downpours are Possible

- Daily Scattered Afternoon & Evening TStorms Friday through Tues

AVIATION /06Z FRIDAY THROUGH 06Z SATURDAY/

Prevailing VFR conditions forecast through this TAF cycle. The main aviation concern will be thunderstorms this afternoon. Refined the PROB30 groups for TSRA at all terminals based on the 12Z hi- resolution ensembles. Confidence may increase enough by the next issuance to consider VCTS and/or TEMPO groups. 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

Warm temperatures will continue through the end of the week, with highs in the mid 90s inland and lower to mid 90s along the coast today. Above-normal temperatures will persist through the weekend, with additional Heat Advisories likely, although isolated to scattered afternoon and evening thunderstorms may provide some relief and limit the duration of heat index values near or above advisory criteria. A cold front will move south into the area Saturday and stall near the Florida/Georgia line Sunday, focusing the highest storm chances along and south of the boundary, particularly toward the I-10 corridor Saturday.

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 76 96 76 96 / 20 40 10 50 SSI 80 93 79 95 / 10 40 10 30 JAX 76 95 75 95 / 20 70 20 40 SGJ 77 93 76 94 / 10 40 20 20 GNV 75 95 74 95 / 30 60 30 30 OCF 76 95 75 96 / 20 50 20 20

JAX WATCHES/WARNINGS/ADVISORIES

FL...Heat Advisory until 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. Heat Advisory from 11 AM to 8 PM EDT Friday 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 until 8 PM EDT this evening for GAZ132>136-149- 151-152-162-163-250-264-350-364. Heat Advisory from 11 AM to 8 PM EDT Friday for GAZ132>136-149- 151-152-162-163-250-264-350-364. Extreme Heat Warning until 8 PM EDT this evening for GAZ153- 154-165-166. Extreme Heat Warning from 11 AM to 8 PM EDT Friday for GAZ153- 154-165-166. MARINE...None.