Extreme Heat Warning
URGENT - WEATHER MESSAGE
National Weather Service Jacksonville FL
1233 PM EDT Mon Aug 17 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-GAZ162-
180900-
/O.NEW.KJAX.XH.W.0006.260818T1500Z-260819T0000Z/
/O.CON.KJAX.HT.Y.0022.000000T0000Z-260818T0000Z/
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-Echols-
Including the cities of Saint Augustine South, Fruit Cove, McAlpin,
Anastasia, Middleburg, Live Oak, Saint Augustine Shore, Suwannee
River Station, Oceanway, Starke, Oleno State Park, Macclenny, Kings
Ferry, Bellair, Newnans Lake, Gainesville, Archer, Lake Butler,
Houston, Columbia, San Marco, Arlington, Bostwick, Anthony, Olustee,
Burbank, High Springs, Tallyrand, Yulee, Suwannee Valley, Espanola,
Weirsdale, Fernandina Beach, Normandy, Needmore, Gainesville Airport,
Green Cove Springs, Picolata, Lakeside, Lynne, Blue Springs, Saint
Augustine, Bunnell, Moss Bluff, Statenville, Bryceville, Ponte Vedra
Beach, Ocala Airport, Winfield, Belmont, Butler Beach, Orange Park,
Dupont Center, Jacksonville, Bakersville, Jasper, Switzerland,
Hilliard, Ortega, Ratliff, Carraway, Saint Augustine Beach, Palm
Valley, Riverside, West Lake, Andalusia, Trenton, Doctors Inlet, New
River, Jennings, Lulu, Lake City, Newberry, Durbin, Watertown,
Suwannee Springs, White Springs, Amelia City, Palatka, Ocala,
Newburn, and Palm Coast
1233 PM EDT Mon Aug 17 2026
...EXTREME HEAT WARNING IN EFFECT FROM 11 AM TO 8 PM EDT TUESDAY...
...HEAT ADVISORY REMAINS IN EFFECT UNTIL 8 PM EDT THIS EVENING...
* WHAT...For the Heat Advisory, heat index values 108 to 112. For the
Extreme Heat Warning, dangerously hot conditions with heat index
values 110 to 115 expected.
* WHERE...Portions of northeast and northern Florida and southeast
Georgia.
* WHEN...For the Heat Advisory, until 8 PM EDT this evening. For the
Extreme Heat Warning, from 11 AM to 8 PM EDT Tuesday.
* IMPACTS...Heat related illnesses increase significantly during
extreme heat and high humidity events. 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.
&&
$$
Heat Advisory
URGENT - WEATHER MESSAGE
National Weather Service Jacksonville FL
1233 PM EDT Mon Aug 17 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-GAZ162-
180900-
/O.NEW.KJAX.XH.W.0006.260818T1500Z-260819T0000Z/
/O.CON.KJAX.HT.Y.0022.000000T0000Z-260818T0000Z/
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-Echols-
Including the cities of Saint Augustine South, Fruit Cove, McAlpin,
Anastasia, Middleburg, Live Oak, Saint Augustine Shore, Suwannee
River Station, Oceanway, Starke, Oleno State Park, Macclenny, Kings
Ferry, Bellair, Newnans Lake, Gainesville, Archer, Lake Butler,
Houston, Columbia, San Marco, Arlington, Bostwick, Anthony, Olustee,
Burbank, High Springs, Tallyrand, Yulee, Suwannee Valley, Espanola,
Weirsdale, Fernandina Beach, Normandy, Needmore, Gainesville Airport,
Green Cove Springs, Picolata, Lakeside, Lynne, Blue Springs, Saint
Augustine, Bunnell, Moss Bluff, Statenville, Bryceville, Ponte Vedra
Beach, Ocala Airport, Winfield, Belmont, Butler Beach, Orange Park,
Dupont Center, Jacksonville, Bakersville, Jasper, Switzerland,
Hilliard, Ortega, Ratliff, Carraway, Saint Augustine Beach, Palm
Valley, Riverside, West Lake, Andalusia, Trenton, Doctors Inlet, New
River, Jennings, Lulu, Lake City, Newberry, Durbin, Watertown,
Suwannee Springs, White Springs, Amelia City, Palatka, Ocala,
Newburn, and Palm Coast
1233 PM EDT Mon Aug 17 2026
...EXTREME HEAT WARNING IN EFFECT FROM 11 AM TO 8 PM EDT TUESDAY...
...HEAT ADVISORY REMAINS IN EFFECT UNTIL 8 PM EDT THIS EVENING...
* WHAT...For the Heat Advisory, heat index values 108 to 112. For the
Extreme Heat Warning, dangerously hot conditions with heat index
values 110 to 115 expected.
* WHERE...Portions of northeast and northern Florida and southeast
Georgia.
* WHEN...For the Heat Advisory, until 8 PM EDT this evening. For the
Extreme Heat Warning, from 11 AM to 8 PM EDT Tuesday.
* IMPACTS...Heat related illnesses increase significantly during
extreme heat and high humidity events. 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.
&&
$$
URGENT - WEATHER MESSAGE
National Weather Service Miami FL
112 AM EDT Mon Aug 17 2026
FLZ063-066>075-168-172>174-172300-
/O.CON.KMFL.HT.Y.0033.260817T1500Z-260817T2300Z/
Glades-Hendry-Inland Palm Beach County-Metro Palm Beach County-
Coastal Collier County-Inland Collier County-Inland Broward
County-Metro Broward County-Inland Miami-Dade County-Metropolitan
Miami Dade-Mainland Monroe-Coastal Palm Beach County-Coastal
Broward County-Coastal Miami Dade County-Far South Miami-Dade
County-
Including the cities of Hendry Correctional, Davie, Felda, Royal
Palm Hammock, Hialeah, Royal Palm Beach, Wellington, Caloosa,
Shark Valley Obs Tower, Belle Glade, Marco Island, Redland, Boca
Raton, Miami, Lion Country Safari Park, Miccosukee Indian
Reservation, Florida Gardens, Mahogany Hammock, Buckhead Ridge,
Brighton Seminole, North Blocks Golde, Carol City, Sunniland,
East Naples, Northwest Cape Sable, Riviera Beach, West Palm
Beach, Bunker Hill, Clewiston, Muse, Lake Worth, Ortona, Moore
Haven, Miramar, Palmdale, Hollywood, Pompano Beach, Pa-Hay Okee
Overlook, Kendall, Kendale Lakes, Marco Island Airport, Lakeport,
The Acreage, Coral Springs, Florida City, Fortymile Bend, Delray
Beach, North Naples, Sunrise, Deerfield Beach, Sandalfoot Cove,
Miles City, Bonita Shores, Jupiter, Golden Gate, Pembroke Pines,
Royal Palm Ranger, Palm Beach Gardens, Boynton Beach, Fort
Lauderdale, Orange Tree, Immokalee, Naples, Sawgrass Mills Mal,
and Greenacres City
112 AM EDT Mon Aug 17 2026
...HEAT ADVISORY REMAINS IN EFFECT FROM 11 AM THIS MORNING TO 7 PM
EDT THIS EVENING...
* WHAT...Heat index values of 105 to 112 expected.
* WHERE...All of South Florida.
* WHEN...From 11 AM this morning to 7 PM EDT this evening.
* 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.
&&
$$
CF
URGENT - WEATHER MESSAGE
National Weather Service Tampa Bay Ruskin FL
1240 AM EDT Mon Aug 17 2026
FLZ043-050-052-056-057-061-139-142-148-149-151-155-160-162-165-239-
242-248-249-251-255-260-262-265-172300-
/O.NEW.KTBW.HT.Y.0017.260817T1500Z-260817T2300Z/
Sumter-Pinellas-Polk-Hardee-Highlands-DeSoto-Coastal Levy-Coastal
Citrus-Coastal Hernando-Coastal Pasco-Coastal Hillsborough-
Coastal Manatee-Coastal Sarasota-Coastal Charlotte-Coastal Lee-
Inland Levy-Inland Citrus-Inland Hernando-Inland Pasco-Inland
Hillsborough-Inland Manatee-Inland Sarasota-Inland Charlotte-
Inland Lee-
Including the cities of Parrish, Lakeland, Hudson, Lakewood Ranch,
Port Charlotte, Sanibel, Anna Maria Island, Cape Coral, Dade City,
Sarasota, Inverness, Punta Gorda, North Port, Cedar Key, Apollo
Beach, Venice, Zephyrhills, Chiefland, Babcock Ranch, Spring Hill,
Clearwater, Placid Lakes, Brandon, Sun City Center, Lake Panasoffkee,
Homosassa, Myakka City, Bayport, Crystal River, Bowling Green, Lehigh
Acres, Avon Park, Hernando Beach, Tampa, Bradenton, Captiva, Fort
Myers, Zolfo Springs, The Villages, Port Richey, Williston,
Yankeetown, Bushnell, Wauchula, Westchase,
Winter Haven, Englewood, Brooksville, St. Petersburg, Sebring,
Plant City, Largo, Bronson, Wildwood, and Arcadia
1240 AM EDT Mon Aug 17 2026
...HEAT ADVISORY IN EFFECT FROM 11 AM THIS MORNING TO 7 PM EDT THIS
EVENING...
* WHAT...Heat index values up to 110 expected.
* WHERE...All of southwest and west central Florida.
* WHEN...From 11 AM this morning to 7 PM EDT this evening.
* IMPACTS...Hot temperatures and high humidity may cause heat
illnesses.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Drink plenty of fluids, stay in an air-conditioned room, stay out of
the sun, and check up on relatives and neighbors.
&&
$$
URGENT - WEATHER MESSAGE
National Weather Service Melbourne FL
1210 AM EDT Mon Aug 17 2026
FLZ041-044>046-053-058-141-144-154-159-164-247-254-259-264-347-447-
547-647-747-180000-
/O.NEW.KMLB.HT.Y.0019.260817T1400Z-260818T0000Z/
Inland Volusia-Northern Lake-Orange-Seminole-Osceola-Okeechobee-
Coastal Volusia-Southern Lake-Coastal Indian River-Coastal Saint
Lucie-Coastal Martin-Inland Northern Brevard-Inland Indian River-
Inland Saint Lucie-Inland Martin-Mainland Northern Brevard-
Northern Brevard Barrier Islands-Inland Southern Brevard-Mainland
Southern Brevard-Southern Brevard Barrier Islands-
Including the cities of Mascotte, Altamonte Springs, Leesburg,
Kissimmee, Winter Park, Sanford, Saint Lucie West, Cocoa, Satellite
Beach, Stuart, Deland, Apopka, Oviedo, Mims, Fort Drum, Viera West,
Fellsmere, Canaveral Groves, Playalinda Beach, Basinger, Titusville,
Cocoa Beach, Mount Dora, Eustis, Port Saint
Lucie, Palm Bay west of I 95, Orlando, Maitland, Daytona Beach,
Groveland, Casselberry, Port Saint John, New Smyrna Beach,
Celebration, Saint Cloud, Merritt Island Wildlife Refuge, Jensen
Beach, Melbourne Beach, Fort Pierce, Indiantown, Rockledge, Deltona,
Ormond Beach, Melbourne, Vero Beach, Clermont, Sebastian, Winter
Springs, Okeechobee, Debary, Hobe Sound, Tradition, Tavares, and
Union Park
1210 AM EDT Mon Aug 17 2026
...HEAT ADVISORY IN EFFECT FROM 10 AM THIS MORNING TO 8 PM EDT THIS
EVENING...
* WHAT...Heat index values of 108 to 112 expected.
* WHERE...A portion of east central Florida.
* WHEN...From 10 AM this morning to 8 PM EDT this evening.
* 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. Young children and
pets should never be left unattended in vehicles under any
circumstances. Take extra precautions if you work or spend time
outside. When possible reschedule strenuous activities to early
morning or evening. Know the signs and symptoms of heat exhaustion
and heat stroke. Wear lightweight and loose fitting clothing when
possible. 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.
&&
$$
Tollefsen
Special Weather Statement
Special Weather Statement
National Weather Service Jacksonville FL
315 PM EDT Mon Aug 17 2026
FLZ038-137-138-237-333-533-633-171945-
Coastal Flagler FL-Western St. Johns FL-
Southeast Coastal St. Johns FL-Inland Flagler FL-Eastern Putnam FL-
Western Putnam FL-Southern Inland St. Johns FL-
315 PM EDT Mon Aug 17 2026
...STRONG THUNDERSTORMS WILL IMPACT NORTHWESTERN FLAGLER...
SOUTHEASTERN ST. JOHNS AND SOUTHEASTERN PUTNAM COUNTIES THROUGH 345
PM EDT...
At 314 PM EDT, Doppler radar was tracking strong thunderstorms near
Hastings, moving east at 20 mph.
HAZARD...Wind gusts around 40 mph.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects.
Locations impacted include...
Palatka, Crescent City, Pomona Park, Hastings, East Palatka,
Andalusia, Marineland, Orange Mills, Satsuma, and San Mateo.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.
&&
LAT...LON 2944 8134 2941 8158 2950 8181 2965 8176
2975 8148 2972 8118 2967 8116 2966 8116
TIME...MOT...LOC 1914Z 286DEG 17KT 2965 8143
MAX HAIL SIZE...0.00 IN
MAX WIND GUST...40 MPH
$$
CORLESS
