013
WWUS72 KJAX 182317
NPWJAX

URGENT - WEATHER MESSAGE
National Weather Service Jacksonville FL
717 PM EDT Tue Aug 18 2026

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-GAZ153-
154-162-165-166-190900-
/O.CAN.KJAX.XH.W.0006.000000T0000Z-260819T0000Z/
/O.CON.KJAX.HT.Y.0024.260819T1500Z-260820T0000Z/
Suwannee-Baker-Inland Nassau-Union-Bradford-Gilchrist-Inland
Flagler-Eastern Hamilton-Coastal Nassau-Coastal Duval-Eastern
Clay-Eastern Alachua-Eastern Putnam-Coastal Flagler-Eastern
Marion-Western Hamilton-Trout River-Western Clay-Northeast
Coastal St. Johns-Western Alachua-Western Putnam-Central Marion-
Northern Columbia-South Central Duval-Southeast Coastal St. Johns-
Western Marion-Southeastern Columbia-Western Duval-Northern
Inland St. Johns-Southwestern Columbia-Southern Inland St. Johns-
Western St. Johns-Inland Glynn-Coastal Glynn-Echols-Inland Camden-
Coastal Camden-
Including the cities of Ratliff, Bryceville, Glynn Haven, Jekyll
Island, Newburn, Butler Beach, Middleburg, Ponte Vedra Beach,
Olustee, Arlington, Saint Augustine South, Bellair, Thalmann,
Weirsdale, Andalusia, White Springs, New River, Moss Bluff,
Ortega, St. Simons, Lake Butler, Starke, Live Oak, Carraway,
Yulee, Winfield, Lake City, Ocala, Doctors Inlet, Trenton, Ocala
Airport, Normandy, Country Club Estate, Saint Augustine Shore,
Burbank, Palatka, Durbin, Saint Augustine Beach, Dover Bluff, Palm
Coast, Kingsland, Blue Springs, Newberry, Statenville, Dungeness, San
Marco, Picolata, Hilliard, Anthony, Riverside, Colesburg, Fernandina
Beach, Palm Valley, Lulu, McAlpin, Macclenny, Anastasia, Gainesville
Airport, Watertown, Orange Park, Kings Ferry, Bostwick, Oleno State
Park, Suwannee Valley, Woodbine, Columbia, Bakersville, Bunnell, West
Lake, Amelia City, Jacksonville, Gainesville, Switzerland, Lakeside,
Waverly, Sea Island, Dock Junction, High Springs, Espanola, Dupont
Center, Green Cove Springs, Archer, Belmont, Jennings, Suwannee River
Station, Newnans Lake, Fruit Cove, Tarboro, Needmore, Tallyrand,
Oceanway, Suwannee Springs, Lynne, Houston, Saint Augustine, and
Jasper
717 PM EDT Tue Aug 18 2026

...EXTREME HEAT WARNING IS CANCELLED...
...HEAT ADVISORY REMAINS IN EFFECT FROM 11 AM TO 8 PM EDT
WEDNESDAY...

* WHAT...Heat index values up to 111 expected.

* WHERE...Portions of northeast and northern Florida and southeast
  Georgia.

* WHEN...From 11 AM to 8 PM EDT Wednesday.

* IMPACTS...Hot temperatures and high humidity may cause heat
  illnesses.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Drink plenty of fluids, stay in an air-conditioned room, stay out of
the sun, and check up on relatives and neighbors.

&&

$$

GAZ163-264-350-364-190900-
/O.CAN.KJAX.HT.Y.0023.000000T0000Z-260819T0000Z/
/O.CON.KJAX.HT.Y.0024.260819T1500Z-260820T0000Z/
Clinch-Northeastern Charlton-Southern Ware-Western Charlton-
Including the cities of Winokur, Homerville, Stephen Foster State
Park, Homeland, St. George, Race Pond, and Folkston
717 PM EDT Tue Aug 18 2026

...HEAT ADVISORY IS CANCELLED...
...HEAT ADVISORY REMAINS IN EFFECT FROM 11 AM TO 8 PM EDT
WEDNESDAY...

* WHAT...Heat index values up to 110 expected.

* WHERE...Clinch, Northeastern Charlton, Southern Ware, and Western
  Charlton Counties.

* WHEN...From 11 AM to 8 PM EDT Wednesday.

* IMPACTS...Hot temperatures and high humidity may cause heat
  illnesses.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Drink plenty of fluids, stay in an air-conditioned room, stay out of
the sun, and check up on relatives and neighbors.

&&

$$

GAZ132>136-149-151-152-250-190030-
/O.CAN.KJAX.HT.Y.0023.000000T0000Z-260819T0000Z/
Coffee-Jeff Davis-Bacon-Appling-Wayne-Atkinson-Pierce-Brantley-
Northern Ware-
Including the cities of Nahunta, Willacoochee, Pearson, Hazlehurst,
Jesup, Hoboken, Atkinson, Axson, Baxley, Plant Hatch, Waynesville,
Pine Grove, Alma, Douglas, Raybon, Needham, Hickox, Hortense, New
Lacy, Waycross, Blackshear, Doctortown, and Gardi
717 PM EDT Tue Aug 18 2026

...HEAT ADVISORY IS CANCELLED...

The threat has ended.

$$

For more information, visit us at www.weather.gov/jax

CORLESS