A weak surface boundary moving across South Florida brought ample instability, lift, and moisture advection to provide conditions prime for convection on August 15th. Heavy downpours and localized flooding occurred, with slow-moving storms, as the boundary continued to linger in far southern FL throughout the day on the 16th.
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 convection on August 15th. Heavy downpours and localized flooding occurred, with slow-moving storms, as the boundary continued to linger in far southern FL throughout the day on the 16th.
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 16, 1:54 PM EST, 2 hours 18 minutes earlier.
Area Forecast Discussion National Weather Service Miami FL 254 PM EDT Fri Aug 16 2024 ...New LONG TERM... .SHORT TERM... (Rest of today through Saturday) Issued at 1219 PM EDT Fri Aug 16 2024 A diffuse boundary remains just south of the area which will allow for a focus for tropical moisture this afternoon. Precipitable water values nearing 2.3 inches, a pattern conducive to coastal convergence, and recent saturating rainfall across portions of the east coast metro areas could lead to a quick trigger for urban flooding today. Activity has been sporadic over the waters and immediate coastal areas this morning and coverage is expected to increase over the next couple of hours as we approach peak daytime heating. Steering flow remains very light, and coupled with elevated PWATs, localized flooding will be the highest risk within any convective activity today. As a result, the area remains under a marginal risk for excessive rainfall from the Weather Prediction Center. Very low confidence in any one specific solution, but HREF LPMM is showing widespread 2-3" with localized 7"+ of rain in some portions of the eastern metro through the evening. While the probability of these higher (7"+) totals occurring are low, all of the signals for heavier rainfall are there today so this scenario cannot completely be ignored. The boundary will shift south tonight into Sunday, allowing for slightly drier air to move into South Florida. This will help provide some relief from the heat and humidity along with provide && .LONG TERM... (Saturday night through next Thursday) Issued at 253 PM EDT Fri Aug 16 2024 Extended range models continue to show a deep mid/upper-level trough across much of the eastern CONUS to kick off the work week; additionally, another frontal boundary stalls to our north and parks itself over N. Florida. This will allow the PWAT values to increase to around 2 to 2.1 inches over South Florida, leading to scattered to numerous coverage. Meanwhile, the Atlantic ridge will retreat from the central portions of the Florida peninsula and the SW Atlantic, further reinforcing a S/SW flow across SoFlo (Monday- Wednesday). With this synoptic scenario in place, expect afternoon convection to favor interior northern and east coast areas at times, mainly in the afternoon hours with diurnal heating. However, morning showers are also possible over most of the region due to the southerly component of the flow to support moisture advection from the Caribbean for much of the long term. Finally, some long-range models introduce the possibility of several short waves in the mid to upper levels of the atmosphere working around the trough of low pressure and advecting into the state. This could allow 500MB temperatures to cool some and increase an isolated severe storm threat towards mid to end of the week. Long-range model solutions suggest that the Atlantic ridge will expand back into the area at the end of the extended forecast, with a weak tropical wave approaching SoFl, advecting more moisture into the CWA. But we will wait for better intra/inter-model consistency and move closer in time before making any major adjustments to extended long-term PoPs/Wx grids. Expect temperatures to begin the work week to elevate after a brief respite from the weekend. Afternoon highs should hover in the mid- 90s except lower to mid 90s west coast areas outside of showers and thunderstorms. Heat index values should be able to get into the 100- 105 range, with some locations reaching up to 108 degrees F. Daytime convection and cloud cover due to elevated moisture content will limit the consistency of the oppressive heat. && .AVIATION... (18Z TAFS) Issued at 1219 PM EDT Fri Aug 16 2024 Scattered showers and storms continue this afternoon leading to the possibility of short-fuse amendments for IFR or even LIFR conditions across sites directly impacted. VCSH continues overnight for southern sites as a weak boundary remains just to the south of the area. Chance for thunderstorms continues tomorrow and tomorrow afternoon but POPs will be maximized across southern portions of the area, primarily Miami Dade and southern Broward sites. && .MARINE... Issued at 1219 PM EDT Fri Aug 16 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. Seas will build into the 3-5 ft range across the Atlantic waters today behind the frontal passage. Isolated-scattered storms will be possible through the period. In and around showers and thunderstorms, locally elevated seas and winds could be realized. && .BEACHES... Issued at 1219 PM EDT Fri Aug 16 2024 A persistent easterly wind flow to close out the week and kick off the weekend could allow for an elevated risk of rip currents to develop along the Atlantic beaches of South Florida, particularly in the Palm Beaches. && .PRELIMINARY POINT TEMPS/POPS... Miami 80 90 79 89 / 30 40 20 40 West Kendall 77 90 76 90 / 40 60 20 40 Opa-Locka 79 90 79 89 / 30 40 20 40 Homestead 78 88 78 88 / 50 60 20 50 Fort Lauderdale 80 88 79 88 / 20 30 10 30 N Ft Lauderdale 80 89 79 88 / 20 20 10 30 Pembroke Pines 80 92 79 89 / 20 30 10 30 West Palm Beach 79 90 77 89 / 10 10 0 20 Boca Raton 80 90 79 88 / 10 20 10 30 Naples 77 92 76 92 / 30 40 20 30 && .MFL WATCHES/WARNINGS/ADVISORIES... FL...None. AM...None. GM...None. && SHORT TERM...Rizzuto LONG TERM....Pine AVIATION...Rizzuto
Hazardous Weather Outlook National Weather Service Miami FL 407 PM EDT Fri Aug 16 2024 AMZ610-630-650-651-670-671-FLZ063-066>075-168-172>174-GMZ656-657-676- 172015- 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- 407 PM EDT Fri Aug 16 2024 This Hazardous Weather Outlook is for Atlantic coastal waters, southeast Florida, southern Florida, southwest Florida and Gulf of Mexico. .DAY ONE...Tonight. 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, particularly in urbanized and poorly-draining areas of South Florida. Rip Currents: A moderate risk of rip currents will develop along the Atlantic beaches of South Florida today. .DAYS TWO THROUGH SEVEN...Saturday through Thursday. Isolated thunderstorms will be possible this weekend with activity becoming more scattered 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 and Sunday. An elevated rip current risk could linger through the weekend along the Atlantic beaches of South Florida. .SPOTTER INFORMATION STATEMENT... Spotter activation may be needed.
Special Weather Statement
National Weather Service Miami FL
247 PM EDT Fri Aug 16 2024
FLZ069-070-161915-
Coastal Collier County FL-Inland Collier County FL-
247 PM EDT Fri Aug 16 2024
...A strong thunderstorm will impact portions of southwestern Collier
County through 315 PM EDT...
At 247 PM EDT, National Weather Service meteorologists were tracking
a strong thunderstorm capable of producing a funnel cloud over East
Naples, or near Naples, moving southwest 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...
Naples, Marco Island, Golden Gate Estates, Cape Romano, Belle Meade,
Marco Island Airport, Naples Manor, Golden Gate, East Naples, Lely
Resort, West Toll Gate On Alligator Alley, Vineyards, Royal Palm
Hammock, North Naples, Lely, Rookery Bay Aquatic Preserve, South
Blocks Golde, Picayune Strand State Forest, Port Of The Island, and
Key Marco.
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.
&&
LAT...LON 2627 8167 2598 8139 2584 8153 2590 8151
2590 8163 2594 8165 2584 8168 2585 8169
2590 8171 2590 8170 2593 8168 2590 8172
2596 8175 2597 8166 2597 8171 2601 8176
2597 8175 2609 8180 2621 8182
TIME...MOT...LOC 1847Z 053DEG 7KT 2612 8175
FUNNEL CLOUD...POSSIBLE
MAX HAIL SIZE...0.00 IN
MAX WIND GUST...50 MPH
CWCSpecial Weather Statement
National Weather Service Miami FL
316 PM EDT Fri Aug 16 2024
FLZ069-070-162000-
Coastal Collier County FL-Inland Collier County FL-
316 PM EDT Fri Aug 16 2024
...A strong thunderstorm will impact portions of southwestern Collier
County through 400 PM EDT...
At 316 PM EDT, National Weather Service meteorologists were tracking
a strong thunderstorm capable of producing a funnel cloud near Royal
Palm Hammock, or 7 miles east of Marco Island, moving west 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...
Naples, Marco Island, Golden Gate Estates, Belle Meade, Marco Island
Airport, Naples Manor, Golden Gate, East Naples, Lely Resort, West
Toll Gate On Alligator Alley, Royal Palm Hammock, Cape Romano,
Vineyards, North Naples, Lely, Rookery Bay Aquatic Preserve, South
Blocks Golde, Port Of The Island, Fiddlers Creek, and Cape Romano
Aquatic Preserve.
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 2624 8166 2589 8136 2589 8151 2584 8153
2585 8153 2590 8156 2594 8165 2584 8168
2593 8168 2593 8173 2597 8166 2598 8167
2601 8175 2597 8175 2599 8176 2621 8182
TIME...MOT...LOC 1916Z 073DEG 7KT 2594 8158
FUNNEL CLOUD...POSSIBLE
MAX HAIL SIZE...0.00 IN
MAX WIND GUST...50 MPH
CWCSpecial Weather Statement
National Weather Service Miami FL
402 PM EDT Fri Aug 16 2024
FLZ069-070-075-162045-
Coastal Collier County FL-Inland Collier County FL-
Mainland Monroe FL-
402 PM EDT Fri Aug 16 2024
...A strong thunderstorm will impact portions of southwestern Collier
and north central Mainland Monroe Counties through 445 PM EDT...
At 402 PM EDT, National Weather Service meteorologists were tracking
a strong thunderstorm capable of producing a funnel cloud near Royal
Palm Hammock, or 10 miles northwest of Everglades City. This storm
was nearly stationary.
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...
Marco Island, Chokoloskee, Everglades City, Golden Gate Estates,
Plantation Island, Carnestown, Marco Island Airport, Copeland, Royal
Palm Hammock, Big Cypress National Preserve, South Blocks Golde,
Fakahatchee Strand State Preserve, Picayune Strand State Forest, Port
Of The Island, Intersection I-75 And Everglades Blvd, Goodland,
Fiddlers Creek, Jerome, and Deep Lake.
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 2598 8175 2596 8170 2597 8166 2598 8167
2598 8169 2599 8174 2620 8158 2602 8115
2578 8112 2582 8136 2581 8136 2589 8148
2585 8153 2590 8151 2592 8156 2590 8163
2594 8163 2591 8165
TIME...MOT...LOC 2002Z 216DEG 3KT 2598 8148
FUNNEL CLOUD...POSSIBLE
MAX HAIL SIZE...0.00 IN
MAX WIND GUST...50 MPH
CWCThe national radar mosaic for the moment the first event began.
3 flood. Local standard time, as filed.
Naples Police report Gordon Drive, south of Galleon Drive, is impassable due to water on roadway. Rainfall estimates were in the 3-4 inch range, most of this falling in about 2 hours.
Naples Police report Rum Row, between Bay Road and Ocean Drive, is impassable due to water on roadway. Rainfall estimates were in the 3-4 inch range, most of this falling in about 2 hours.
An off duty NWS employee reported flooding south of US 41 along Collier Blvd and Henderson Creek Dr. Street flooding reached six inches in spots with water encroaching some garages in the neighborhood. Observed rainfall in the area was in the 4 to 6 inch range, most of it falling in about 3 hours. Time is estimated.
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: 1211379, 1211376, 1211367.