851
WWUS72 KJAX 191820
NPWJAX
URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE JACKSONVILLE FL
220 PM EDT WED AUG 19 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-
154-162-163-165-166-264-350-364-201030-
/O.NEW.KJAX.HT.Y.0025.260820T1500Z-260820T2300Z/
/O.CON.KJAX.HT.Y.0024.000000T0000Z-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-CLINCH-INLAND
CAMDEN-COASTAL CAMDEN-NORTHEASTERN CHARLTON-SOUTHERN WARE-WESTERN
CHARLTON-
INCLUDING THE CITIES OF TARBORO, WATERTOWN, OLUSTEE, SAINT AUGUSTINE
SOUTH, JASPER, LAKE BUTLER, BUTLER BEACH, STARKE, WOODBINE, NEEDMORE,
COLESBURG, RATLIFF, SAINT AUGUSTINE BEACH, WEIRSDALE, ORTEGA, OLENO
STATE PARK, DOVER BLUFF, COLUMBIA, SUWANNEE SPRINGS, WEST LAKE, MOSS
BLUFF, STEPHEN FOSTER STATE PARK, DOCK JUNCTION, THALMANN, FERNANDINA
BEACH, LAKE CITY, HOMELAND, OCALA, JEKYLL ISLAND, SAINT AUGUSTINE
SHORE, OCALA AIRPORT, HIGH SPRINGS, BLUE SPRINGS, SAINT AUGUSTINE,
KINGS FERRY, MIDDLEBURG, NEW RIVER, MCALPIN, DURBIN, PONTE VEDRA
BEACH, JACKSONVILLE, DUPONT CENTER, NEWNANS LAKE, HILLIARD, WINOKUR,
ARCHER, DUNGENESS, PALATKA, TRENTON, LYNNE, NORMANDY, BUNNELL,
HOUSTON, AMELIA CITY, MACCLENNY, GAINESVILLE, SUWANNEE VALLEY,
JENNINGS, WINFIELD, FRUIT COVE, KINGSLAND, DOCTORS INLET,
STATENVILLE, ANASTASIA, ESPANOLA, OCEANWAY, GLYNN HAVEN, ST.
SIMONS, NEWBERRY, WAVERLY, BELMONT, PALM COAST, BELLAIR, ARLINGTON,
ANTHONY, SUWANNEE RIVER STATION, TALLYRAND, COUNTRY CLUB ESTATE, SEA
ISLAND, CARRAWAY, ORANGE PARK, FOLKSTON, BRYCEVILLE, NEWBURN, LULU,
BAKERSVILLE, HOMERVILLE, SWITZERLAND,
LAKESIDE, WHITE SPRINGS, ST. GEORGE, BOSTWICK, YULEE, GREEN COVE
SPRINGS, GAINESVILLE AIRPORT, RIVERSIDE, PICOLATA, LIVE OAK, PALM
VALLEY, ANDALUSIA, RACE POND, SAN MARCO, AND BURBANK
220 PM EDT WED AUG 19 2026
..HEAT ADVISORY IN EFFECT FROM 11 AM TO 7 PM EDT THURSDAY
..HEAT ADVISORY REMAINS IN EFFECT UNTIL 8 PM EDT THIS EVENING
* WHAT...FOR THE FIRST HEAT ADVISORY, HEAT INDEX VALUES UP TO 111.
FOR THE SECOND HEAT ADVISORY, HEAT INDEX VALUES UP TO 110 EXPECTED.
* WHERE...PORTIONS OF NORTHEAST AND NORTHERN FLORIDA AND SOUTHEAST
GEORGIA.
* WHEN...FOR THE FIRST HEAT ADVISORY, UNTIL 8 PM EDT THIS EVENING.
FOR THE SECOND HEAT ADVISORY, FROM 11 AM TO 7 PM EDT THURSDAY.
* IMPACTS...HOT TEMPERATURES AND HIGH HUMIDITY MAY CAUSE HEAT
ILLNESSES.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
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.
DRINK PLENTY OF FLUIDS, STAY IN AN AIR-CONDITIONED ROOM, STAY OUT OF
THE SUN, AND CHECK UP ON RELATIVES AND NEIGHBORS.
FOR MORE INFORMATION, VISIT US AT WWW.WEATHER.GOV/JAX
SHASHY
CLICK HERE TO GO TO PREVIOUS BULLETINS.
Main Text Page