351
WWUS72 KJAX 202305
NPWJAX
URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE JACKSONVILLE FL
705 PM EDT THU AUG 20 2026
FLZ038-125-132-137-138-232-233-237-325-333-433-533-633-211700-
/O.EXP.KJAX.HT.Y.0025.000000T0000Z-260820T2300Z/
/O.CON.KJAX.HT.Y.0026.260821T1500Z-260821T2300Z/
INLAND FLAGLER-COASTAL DUVAL-EASTERN CLAY-EASTERN PUTNAM-COASTAL
FLAGLER-WESTERN CLAY-NORTHEAST COASTAL ST. JOHNS-WESTERN PUTNAM-
SOUTH CENTRAL DUVAL-SOUTHEAST COASTAL ST. JOHNS-NORTHERN INLAND
ST. JOHNS-SOUTHERN INLAND ST. JOHNS-WESTERN ST. JOHNS-
INCLUDING THE CITIES OF ORTEGA, PONTE VEDRA BEACH, SAINT AUGUSTINE
SOUTH, ANASTASIA, GREEN COVE SPRINGS, SWITZERLAND, PICOLATA, SAINT
AUGUSTINE BEACH, BAKERSVILLE, FRUIT COVE, DOCTORS INLET,
JACKSONVILLE, ESPANOLA, ARLINGTON, MIDDLEBURG, LAKESIDE, CARRAWAY,
PALM COAST, SAINT AUGUSTINE SHORE, BOSTWICK, ANDALUSIA, TALLYRAND,
ORANGE PARK, OCEANWAY, PALM VALLEY, DUPONT CENTER, BELLAIR,
RIVERSIDE, SAN MARCO, PALATKA, BUTLER BEACH, SAINT AUGUSTINE,
BUNNELL, AND DURBIN
705 PM EDT THU AUG 20 2026
..HEAT ADVISORY FOR TODAY HAS EXPIRED
..HEAT ADVISORY REMAINS IN EFFECT FROM 11 AM TO 7 PM EDT FRIDAY
* WHAT...HEAT INDEX VALUES UP TO 109 EXPECTED.
* WHERE...A PORTION OF NORTHEAST FLORIDA.
* WHEN...FROM 11 AM TO 7 PM EDT FRIDAY.
* 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.
TAKE EXTRA PRECAUTIONS WHEN OUTSIDE. WEAR LIGHTWEIGHT AND LOOSE
FITTING CLOTHING. TRY TO LIMIT STRENUOUS ACTIVITIES TO EARLY MORNING
OR EVENING. TAKE ACTION WHEN YOU SEE SYMPTOMS OF HEAT EXHAUSTION AND
HEAT STROKE.
TO REDUCE RISK DURING OUTDOOR WORK, THE OCCUPATIONAL SAFETY AND
HEALTH ADMINISTRATION RECOMMENDS SCHEDULING FREQUENT REST BREAKS IN
SHADED OR AIR CONDITIONED ENVIRONMENTS. ANYONE OVERCOME BY HEAT
SHOULD BE MOVED TO A COOL AND SHADED LOCATION. HEAT STROKE IS AN
EMERGENCY! CALL 9 1 1.
FLZ021-023-024-030-031-035-120-124-136-140-220-225-236-240-322-340-
422-425-522-GAZ153-154-162-163-165-166-264-350-364-210015-
/O.EXP.KJAX.HT.Y.0025.000000T0000Z-260820T2300Z/
SUWANNEE-BAKER-INLAND NASSAU-UNION-BRADFORD-GILCHRIST-EASTERN
HAMILTON-COASTAL NASSAU-EASTERN ALACHUA-EASTERN MARION-WESTERN
HAMILTON-TROUT RIVER-WESTERN ALACHUA-CENTRAL MARION-NORTHERN
COLUMBIA-WESTERN MARION-SOUTHEASTERN COLUMBIA-WESTERN DUVAL-
SOUTHWESTERN COLUMBIA-INLAND GLYNN-COASTAL GLYNN-ECHOLS-CLINCH-
INLAND CAMDEN-COASTAL CAMDEN-NORTHEASTERN CHARLTON-SOUTHERN WARE-
WESTERN CHARLTON-
INCLUDING THE CITIES OF DUNGENESS, ST. SIMONS, OCALA, BLUE
SPRINGS, LULU, HIGH SPRINGS, TARBORO, KINGSLAND, NEWNANS LAKE, GLYNN
HAVEN, NEW RIVER, WHITE SPRINGS, GAINESVILLE AIRPORT, WATERTOWN,
STARKE, SUWANNEE VALLEY, SUWANNEE RIVER STATION, WEST LAKE, WINOKUR,
COLUMBIA, HOUSTON, YULEE, OCALA AIRPORT, AMELIA CITY, MCALPIN,
RATLIFF, THALMANN, RACE POND, TRENTON, BRYCEVILLE, NEWBURN, NEWBERRY,
NEEDMORE, BELMONT, MOSS BLUFF, OLUSTEE, STEPHEN FOSTER STATE PARK,
JENNINGS, HOMELAND, COLESBURG, MACCLENNY, ARCHER, KINGS FERRY, LAKE
CITY, SUWANNEE SPRINGS, LAKE
BUTLER, WEIRSDALE, ST. GEORGE, DOCK JUNCTION, WAVERLY, SEA
ISLAND, ANTHONY, JASPER, HILLIARD, OLENO STATE PARK, BURBANK, COUNTRY
CLUB ESTATE, WOODBINE, FERNANDINA BEACH, STATENVILLE, HOMERVILLE,
DOVER BLUFF, JEKYLL ISLAND, GAINESVILLE, LIVE OAK, WINFIELD,
NORMANDY, FOLKSTON, AND LYNNE
705 PM EDT THU AUG 20 2026
..HEAT ADVISORY FOR TODAY HAS EXPIRED
THE THREAT HAS ENDED.
FOR MORE INFORMATION, VISIT US AT WWW.WEATHER.GOV/JAX
AC
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