A weak surface boundary moving across South Florida brought ample instability, lift, and moisture advection to provide conditions prime for afternoon convection on August 15th. Numerous showers and thunderstorms brough the threat for hazards such as heavy downpours, gusty winds, and localized flooding with any slow moving storms.
Every event with a place to put it. Tap one for its entry below.
Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.
The episode as NWS MFL wrote it up.
A weak surface boundary moving across South Florida brought ample instability, lift, and moisture advection to provide conditions prime for afternoon convection on August 15th. Numerous showers and thunderstorms brough the threat for hazards such as heavy downpours, gusty winds, and localized flooding with any slow moving storms.
The local office's own words before the first event, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Miami, FL wrote its last area forecast discussion before the first event at Aug 15, 1:13 PM EST, 2 hours 37 minutes earlier.
Area Forecast Discussion
National Weather Service Miami FL
213 PM EDT Thu Aug 15 2024
...New LONG TERM...
.SHORT TERM...
(Rest of today through Friday)
Issued at 1215 PM EDT Thu Aug 15 2024
A weak surface boundary is moving across South Florida today as
an associated upper level trough slips off the East Coast.
Moisture advection will increase as a result as winds shift from
north- northeast, with PWATs rising into the 2.0-2.3 inch range.
This, combined with ample modeled instability and lift provided by
the front will lead to higher chances for showers and storms this
afternoon, as well as greater storm coverage as the front drops
south (70-80% chance). This boundary may linger over or just south
of the region on Friday, promoting continued moisture advection
and enhanced chances for afternoon showers and thunderstorms to
develop over the southernmost portions of the peninsula.
High temperatures will remain in the low-mid 90s each afternoon
ahead of the frontal passage, with peak heat indices in the 106 -
112F range thanks to the increasing moisture. Little relief will
be felt overnight as low temperatures remain in the upper 70s and
lower 80s. A Heat Advisory is in effect from 10 AM - 6PM today.
&&
.LONG TERM...
(Friday night through next Wednesday)
Issued at 213 PM EDT Thu Aug 15 2024
A weak surface boundary will propagate through the area this
weekend, which will be accompanied by a drier air mass and an
overall weak flow pattern. Thus, PoPs decrease into the 20-30% range
over most of the region for the weekend with convection expected to
be primarily isolated. For next week, synoptic scale troughing will
amplify across the Eastern Seaboard, providing extra forcing for
ascent which will occur simultaneously with some moisture
resurgence. As this occurs, chances for showers and thunderstorms
will gradually rise back up to 40-60% by the middle of next week.
Due to the drier air advecting into South Florida, dew points are
expected to fall from the upper 70s to the lower 70s for the
weekend, allowing for some relief from the oppressive heat. Heat
index values are expected to fall below 100 degrees for most of
South Florida this weekend before rising higher into triple digits
again as moisture increases early next week. High temperatures each
day are projected in the low 90s for the weekend, with a gradual
rise to the mid 90s by the middle of next week.
&&
.AVIATION...
(18Z TAFS)
Issued at 1215 PM EDT Thu Aug 15 2024
Scattered showers and thunderstorms likely this afternoon with
TEMPOs added for some east coast sites where rain chances are
maximized. A few showers may linger into overnight period so
keeping VCSH overnight with light/variable flow. Surface flow
veers more northeasterly tomorrow afternoon with additional
showers and thunderstorms. &&
.MARINE...
Issued at 1215 PM EDT Thu Aug 15 2024
Winds will shift out of the north-northeast across the local
Atlantic waters, and out of the north-northwest across the Gulf
waters as a weak surface boundary pushes south across the
peninsula today. Seas will remain below 2 ft on today, but could
build into the 3-5 ft range across the Atlantic waters on Friday
behind the frontal passage. Isolated-scattered storms will be
possible through the period. In and around showers and
&&
.MARINE...
Issued at 1215 PM EDT Thu Aug 15 2024
Winds will shift out of the north-northeast across the local
Atlantic waters, and out of the north-northwest across the Gulf
waters as a weak surface boundary pushes south across the
peninsula today. Seas will remain below 2 ft on today, but could
build into the 3-5 ft range across the Atlantic waters on Friday
behind the frontal passage. Isolated-scattered storms will be
possible through the period. In and around showers and
&&
.PRELIMINARY POINT TEMPS/POPS...
Miami 79 90 79 90 / 60 70 30 40
West Kendall 77 90 75 90 / 60 70 30 40
Opa-Locka 79 90 78 90 / 60 70 20 30
Homestead 77 89 78 89 / 60 70 40 50
Fort Lauderdale 79 88 79 89 / 70 60 20 30
N Ft Lauderdale 79 89 80 89 / 60 60 20 30
Pembroke Pines 80 92 79 92 / 60 60 20 30
West Palm Beach 79 89 78 90 / 50 40 10 20
Boca Raton 79 90 78 90 / 60 50 10 20
Naples 78 91 76 92 / 50 70 20 30
&&
.MFL WATCHES/WARNINGS/ADVISORIES...
FL...Heat Advisory until 6 PM EDT this evening for FLZ063-066>075-168-
172>174.
AM...None.
GM...None.
&&
SHORT TERM...Rizzuto
LONG TERM....Redman
AVIATION...RizzutoHazardous Weather Outlook National Weather Service Miami FL 257 PM EDT Thu Aug 15 2024 AMZ610-630-650-651-670-671-FLZ063-066>075-168-172>174-GMZ656-657-676- 161900- Lake Okeechobee-Biscayne Bay- Coastal waters from Jupiter Inlet to Deerfield Beach FL out 20 NM- Coastal waters from Deerfield Beach to Ocean Reef FL out 20 NM- Waters from Jupiter Inlet to Deerfield Beach FL from 20 to 60 NM- Waters from Deerfield Beach to Ocean Reef FL from 20 to 60 NM excluding the territorial waters of Bahamas-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- Coastal waters from Chokoloskee to Bonita Beach FL out 20 NM- Coastal waters from East Cape Sable to Chokoloskee FL out 20 NM- Waters from Chokoloskee to Bonita Beach FL from 20 to 60 NM- 257 PM EDT Thu Aug 15 2024 ...Heat Advisory: All of South Florida Today... ...Scattered to Numerous Storms Today... This Hazardous Weather Outlook is for Atlantic coastal waters, southeast Florida, southern Florida, southwest Florida and Gulf of Mexico. .DAY ONE...This afternoon and tonight. Excessive Heat: A Heat Advisory is in effect for all of South Florida, with the worst impacts expected between 10 AM to 6 PM. Heat indices will range between 105 to 110 degrees. Some portions of Palm Beach County and Southwest Florida could see heat index values rise above 110. Thunderstorms: Scattered to numerous thunderstorms could bring gusty winds and heavy downpours this afternoon. Flooding: Excessive rainfall from slow-moving thunderstorms could lead to localized flooding. .DAYS TWO THROUGH SEVEN...Friday through Wednesday. Isolated to scattered thunderstorms will be possible each day into early next week. The strongest storms could contain heavy downpours and gusty winds. Heat indices will remain in the triple digits each afternoon except for Saturday. .SPOTTER INFORMATION STATEMENT... Spotter activation may be needed.
Special Weather Statement
National Weather Service Miami FL
253 PM EDT Thu Aug 15 2024
FLZ070-073-075-151930-
Inland Collier County FL-Mainland Monroe FL-Inland Miami-
Dade County FL-
253 PM EDT Thu Aug 15 2024
...A strong thunderstorm will impact portions of southeastern
Collier, northern Mainland Monroe and northern Miami-Dade Counties
through 330 PM EDT...
At 253 PM EDT, National Weather Service meteorologists were tracking
a strong thunderstorm near Fortymile Bend, or 25 miles northwest of
Homestead General Airport, moving east at 15 mph.
HAZARD...Wind gusts of 45 to 50 mph.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects.
Locations impacted include...
Shark Valley Obs Tower, Loop Road Ee Center, Fortymile Bend, and
Everglades National Park.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
These winds can down small tree limbs and branches, and blow around
unsecured small objects. Seek shelter in a safe building until the
storm passes.
&&
LAT...LON 2565 8103 2586 8091 2581 8064 2548 8077
TIME...MOT...LOC 1853Z 291DEG 13KT 2572 8088
MAX HAIL SIZE...0.00 IN
MAX WIND GUST...50 MPH
CWCSpecial Weather Statement
National Weather Service Miami FL
303 PM EDT Thu Aug 15 2024
FLZ067-068-071-072-172-151930-
Inland Broward County FL-Coastal Broward County FL-
Metro Broward County FL-Inland Palm Beach County FL-
Metro Palm Beach County FL-
303 PM EDT Thu Aug 15 2024
...A strong thunderstorm will impact portions of northern Broward and
southern Palm Beach Counties through 330 PM EDT...
At 303 PM EDT, National Weather Service meteorologists were tracking
a strong thunderstorm over North Lauderdale, or over Margate, moving
southeast at 10 mph.
HAZARD...Wind gusts of 45 to 50 mph.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects.
Locations impacted include...
Fort Lauderdale, Hollywood, Coral Springs, Pompano Beach, Plantation,
Sunrise, Deerfield Beach, Tamarac, Margate, Lighthouse Point,
Lauderdale-By-The-Sea, Lauderhill, Coconut Creek, Oakland Park, North
Lauderdale, Lauderdale Lakes, Dania Beach, Parkland, Wilton Manors,
and Hillsboro Beach.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
These winds can down small tree limbs and branches, and blow around
unsecured small objects. Seek shelter in a safe building until the
storm passes.
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 2610 8010 2610 8011 2612 8011 2611 8012
2608 8011 2606 8011 2617 8034 2635 8023
2630 8008
TIME...MOT...LOC 1903Z 301DEG 7KT 2623 8021
MAX HAIL SIZE...0.00 IN
MAX WIND GUST...50 MPH
CWCSpecial Weather Statement
National Weather Service Miami FL
339 PM EDT Thu Aug 15 2024
FLZ074-173-152015-
Metropolitan Miami Dade FL-Coastal Miami Dade County FL-
339 PM EDT Thu Aug 15 2024
...A strong thunderstorm will impact portions of northern Miami-Dade
County through 415 PM EDT...
At 339 PM EDT, National Weather Service meteorologists were tracking
a strong thunderstorm capable of producing a funnel cloud over
Pinewood, or near Hialeah, moving south at 10 mph.
HAZARD...Funnel clouds and wind gusts of 45 to 50 mph.
SOURCE...Radar indicated.
IMPACT...Funnel clouds occasionally touch down and produce tornadoes
or waterspouts. Gusty winds could knock down tree limbs and
blow around unsecured objects.
Locations impacted include...
Miami, Hialeah, Miami Beach, Coral Gables, South Miami, Surfside,
Virginia Key, Miami Gardens, North Miami, North Miami Beach,
Aventura, Miami Lakes, Hialeah Gardens, Sunny Isles Beach, Pinecrest,
Opa-Locka, Miami Springs, Miami Shores, North Bay Village, and West
Miami.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
These winds can down small tree limbs and branches, and blow around
unsecured small objects. Seek shelter in a safe building until the
storm passes.
Funnel clouds occasionally touch down and produce tornadoes or
waterspouts. Move indoors and stay away from windows.
Torrential rainfall is also occurring with this storm and may lead to
localized flooding. Do not drive your vehicle through flooded
roadways.
&&
LAT...LON 2577 8013 2581 8014 2582 8018 2577 8018
2576 8013 2576 8014 2575 8014 2571 8015
2570 8017 2572 8016 2576 8020 2565 8029
2592 8034 2596 8013 2589 8013 2591 8011
2590 8011
TIME...MOT...LOC 1939Z 339DEG 7KT 2586 8021
FUNNEL CLOUD...POSSIBLE
MAX HAIL SIZE...0.00 IN
MAX WIND GUST...50 MPH
CWCSpecial Weather Statement
National Weather Service Miami FL
415 PM EDT Thu Aug 15 2024
FLZ074-173-152045-
Metropolitan Miami Dade FL-Coastal Miami Dade County FL-
415 PM EDT Thu Aug 15 2024
...A strong thunderstorm will impact portions of northern Miami-Dade
County through 445 PM EDT...
At 415 PM EDT, National Weather Service meteorologists were tracking
a strong thunderstorm capable of producing a funnel cloud over
Marlins Park, or over Miami, moving southeast at 10 mph.
HAZARD...Funnel clouds and wind gusts of 45 to 50 mph.
SOURCE...Radar indicated.
IMPACT...Funnel clouds occasionally touch down and produce tornadoes
or waterspouts. Gusty winds could knock down tree limbs and
blow around unsecured objects.
Locations impacted include...
Miami, Hialeah, Miami Beach, Coral Gables, Key Biscayne, South Miami,
Black Point, Kendall, Pinecrest, Miami Springs, North Bay Village,
West Miami, Medley, Gladeview, Glenvar Heights, Palmetto Bay,
University Of Miami, Downtown Miami, Coconut Grove, and Coral
Terrace.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
These winds can down small tree limbs and branches, and blow around
unsecured small objects. Seek shelter in a safe building until the
storm passes.
Excessive 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 2574 8021 2567 8015 2567 8016 2574 8022
2570 8026 2569 8026 2569 8025 2557 8030
2552 8017 2555 8032 2552 8018 2541 8021
2542 8021 2550 8019 2554 8033 2586 8031
2584 8012
TIME...MOT...LOC 2015Z 322DEG 7KT 2576 8024
FUNNEL CLOUD...POSSIBLE
LIGHTNING...EXCESSIVE
MAX HAIL SIZE...0.00 IN
MAX WIND GUST...50 MPH
CWCThe national radar mosaic for the moment the first event began.
1 flood. Local standard time, as filed.
Social media video showing several inches of water covering the entire street with water |past the curb and sidewalks. It was still passable for vehicles in the center of the street. Rainfall estimates in the area were in the 2-3 inch range.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Florida in 2024Every state in 2024This day in weather historyWarnings in Florida, August 2024
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24. Each event’s entry at NCEI: 1211363.