While storm coverage was limited, dry air from the Saharan Air Layer helped enhance the strength of afternoon showers and storms. Activity that developed along the east coast seabreeze in Miami-Dade County early in the afternoon produced numerous reports of hail over the western suburbs of Miami metro area from Doral to West Kendall.
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.
While storm coverage was limited, dry air from the Saharan Air Layer helped enhance the strength of afternoon showers and storms. Activity that developed along the east coast seabreeze in Miami-Dade County early in the afternoon produced numerous reports of hail over the western suburbs of Miami metro area from Doral to West Kendall. Winds were recorded in the 40-50 mph range. Additional storms across Palm Beach County later in the afternoon and evening produced wind damage around Lake Okeechobee.
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 9, 3:02 PM EST, 1 hour 2 minutes earlier.
Area Forecast Discussion National Weather Service Miami FL 402 PM EDT Thu Aug 9 2018 .DISCUSSION... Surface high pressure continues to dominate the synoptic pattern affecting sensible weather in South Florida providing warm, relatively drier conditions. Saharan dust the last few days over the region has also contributed to diminished convective coverage. As the dust moves on from the region over the next day or so, the atmospheric moisture at those higher levels should be able to recover closer to what is more typical for summertime in South Florida. Friday will be another warm day with heat index values easily reaching into the 100s during the peak parts of the day. As the weekend approaches, moisture will recover and convective coverage will increase closer to what is more typical for South Florida in August. Temperatures will continue to be warm and heat index values will still rise into the 100s. The light wind flow expected will allow any sea breezes that develop to push inland which should allow convection to focus over the interior portions of the area where those boundaries collide. As we enter the early part of next week, a system pushing through the Great Lakes will push the Atlantic high pressure southward. A tropical upper tropospheric trough will push through the Greater Antilles and near the southern Florida region on late Monday into Tuesday. High pressure will build back by midweek with the summer pattern continuing. && .MARINE... Light flow will persist through the weekend with showers and storms possible each day and over the waters in the overnights and early morning hours. Lake Okeechobee could see afternoon showers and storms in the vicinity. The main concerns will be lightning and locally strong wind gusts and higher seas with thunderstorms. && .BEACH FORECAST... There is a Beach Hazard Statement in effect for Collier County beaches through at least this evening. Significant red tide conditions may lead to respiratory irritation, especially across central and northern parts of the coastline. && .PREV DISCUSSION... /issued 149 PM EDT Thu Aug 9 2018/ AVIATION... East coast sea breeze has pushed just west of MIA and well west of FLL as of 1745Z. Scattered showers and isolated thunderstorms will begin developing along the sea breeze before 19Z. Most of the activity will occur just west of the east coast terminals. However, given a westerly storm motion this afternoon, it's a good idea to have at least VCSH for east coast terminals from 19-23Z. Left VCSH out of FLL since FLL will be farther from the sea breeze and activity than the other terminals. Will need to monitor as VCTS could become necessary. A few storms could become strong this afternoon. Even if they occur west of terminals, they could produce outflow boundaries that make winds temporarily gusty and erratic. && .PRELIMINARY POINT TEMPS/POPS... West Palm Beach 76 91 75 91 / 20 30 30 50 Fort Lauderdale 78 91 78 90 / 10 30 30 40 Miami 76 91 76 90 / 10 40 30 50 Naples 76 91 77 90 / 10 20 20 20 && .MFL WATCHES/WARNINGS/ADVISORIES... FL...Beach Hazards Statement through Sunday evening for FLZ069. AM...None. GM...None. && DISCUSSION...02/RAG MARINE...02/RAG AVIATION...98/ABH BEACH FORECAST...02/RAG
Hazardous Weather Outlook for South Florida National Weather Service Miami FL 939 AM EDT Thu Aug 9 2018 AMZ610-630-650-651-670-671-FLZ063-066>075-168-172>174-GMZ656-657-676- 100145- 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-Metro Palm Beach-Coastal Collier-Inland Collier- Inland Broward-Metro Broward-Inland Miami-Dade-Metro Miami-Dade- Mainland Monroe-Coastal Palm Beach-Coastal Broward-Coastal Miami- Dade-Far South Miami-Dade- 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- 939 AM EDT Thu Aug 9 2018 ...SCATTERED AFTERNOON THUNDERSTORMS INTERIOR... ...HEAT INDEX VALUES 105 TO 107 DEGREES... This hazardous weather outlook is for South Florida. .DAY ONE...TODAY AND TONIGHT Thunderstorms: There is a chance of thunderstorms mainly this afternoon as sea breezes push inland over interior South Florida. Cloud-to-ground lightning and gusty winds are the primary threats. Wind: Wind gusts in the strongest storms this afternoon in the interior and western portions of the east coast metro could exceed 40 mph. Temperatures: Heat indices will reach 105 to 107 degrees across much of South Florida today. .DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY There is a chance of mainly afternoon thunderstorms through the period, especially over interior South Florida. The best chances for thunderstorms will be Saturday through Monday. Lightning is the primary threat. .SPOTTER INFORMATION STATEMENT... Spotter activation will not be needed. For more information...visit the National Weather Service in Miami website at www.weather.gov/miami. Hagen
Special Weather Statement National Weather Service Miami FL 409 PM EDT THU AUG 9 2018 FLZ072>074-173-092115- Metropolitan Miami Dade FL-Metro Broward County FL-Inland Miami- Dade County FL-Coastal Miami Dade County FL- 409 PM EDT THU AUG 9 2018 ...SIGNIFICANT WEATHER ADVISORY FOR NORTHERN MIAMI-DADE AND SOUTHERN BROWARD COUNTIES UNTIL 515 PM EDT... * At 408 PM EDT, National Weather Service meteorologists were tracking a strong thunderstorm over Royal Palm Ranches, or near Pembroke Pines. This storm was nearly stationary. * Small hail and wind gusts up to 50 mph possible with this storm. * Locations impacted include... Miami, Hialeah, Fort Lauderdale, Pembroke Pines, Hollywood, Miramar, Davie, Plantation, Sunrise, Miami Gardens, Weston, North Miami, North Miami Beach, Dania Beach, Miami Lakes, Cooper City, Hialeah Gardens, Opa-Locka, West Park and Miami Springs. 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. Torrential rainfall is also occurring with this storm, and may lead to localized flooding. Do not drive your vehicle through flooded roadways. To report severe weather, contact your nearest law enforcement agency. You can also share your report with NWS Miami on Facebook and Twitter. && LAT...LON 2585 8039 2613 8036 2610 8018 2582 8021 TIME...MOT...LOC 2008Z 265DEG 1KT 2603 8029 ALM
The Miami radar (KAMX), 20 km away, was scanning. The volume nearest the first event began at 21:04 UTC.
5 hail, 1 thunderstorm wind. Local standard time, as filed.
Trained spotter reported dime sized hail along the Florida Turnpike near NW 41st Street. An additional report of pea sized hail was received nearby at the intersection of NW 107th Avenue and SR 836/Dolphin Expressway.
Trained spotter reported one-half inch to three-quarter inch hail from 520 to 535 PM EDT.
A trained spotter reported dime sized hail near the intersection of Miller Drive and SW 137th Avenue.
Public picture and video received of pea sized hail falling with embedded larger pieces estimated up to half dollar size.
Public report of hail ranging in size from one-quarter inch up to three-fifths of an inch in The Hammocks near SW 142 Avenue and SW 112 Street. Additional pea -sized reports were received in the nearby Kendale Lakes area.
Member of public, an employee of local business, reports numerous large tree branches down, 6-inches in diameter and greater. Also, the top of a palm tree was snapped off. Time estimated based on Doppler radar.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Florida in 2018Every state in 2018This day in weather historyWarnings in Florida, August 2018
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: 783507, 783508, 783509, 783510, 783511, 781414.