A strong, slow-moving thunderstorm produced sub-severe wind gusts and isolated damage to a shed in Ocoee.
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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 MLB wrote it up.
A strong, slow-moving thunderstorm produced sub-severe wind gusts and isolated damage to a shed in Ocoee.
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 Melbourne, FL wrote its last area forecast discussion before the first event at Sep 4, 2:34 PM EST, 16 minutes earlier.
Area Forecast Discussion National Weather Service Melbourne FL 334 PM EDT Fri Sep 4 2020 .DISCUSSION... Current-Tonight... A mid to upper level high pressure system is to the north of ECFL today. Sultry conditions continues at the surface this afternoon with warm temperatures aloft. Deep layer riding remains over the region with the surface ridge axis sliding just south of central FL today. Subsidence will continue across the area. Highest PWAT values of above 2 inches occurring across the I-4 corridor with lower values of around 1.80-1.90 inches occurring south of KMLB. Instability remains limited, therefore, we continued to carry lower than normal isolated to (low-end) scattered lightning storm chances in the forecast. Showers and storms have pushed inland with the sea breeze from the I-4 corridor northward. Additional convection should develop from future boundary collisions. Highest storm chances continue along/north of I-4 this afternoon and early evening. Primary threat with the strongest of these storms will be locally heavy rainfall, gusty winds, and cloud-to-ground lightning strikes. Storm steering flow is weak, which may cause some of the storm cells to have erratic movement. Convection is expected to diminish by around sunset or shortly thereafter. Any cloud debris will decrease through late evening and overnight. Mostly dry and muggy overnight as temperatures settle in to the mid to upper 70s. Previous Extended Forecast Discussion... Saturday-Sunday...A strong mid level ridge extending from the western Atlantic to the Florida panhandle will gradually erode as a mid latitude trough amplifies slightly along the eastern seaboard. A surface ridge to the north of central Florida collapses by Sunday as an inverted trough over the NW Caribbean, associated with a mid/upper cyclone approaches Cuba and the FL Straits. Increasing deep-layer moisture (Precipitable Water values 2+ inches) advects into region on back side of Caribbean TUTT cell. POPs remaining below climo Saturday, then quickly trending to above normal Sunday. Monday-Friday...Deep/moisture easterly flow regime likely to remain dominant much of the upcoming week. Early cool-season cold front reaches the interior deep south toward the end of the week, acting to continue pool of deep moisture across FL. GFS/ECM consistent with high shower/storm coverage each day, lingering into the evenings across the interior CWA and redeveloping over the Atlantic late each night and spreading onshore the coast during the late night, early morning periods. Max temps remaining several degrees above normal Saturday, then trending closer to climo thereafter given moist onshore flow. Have capped POPs at 70 percent diurnally through the week, with 20-30 percent chance during overnight periods. && .AVIATION... Inland moving sea breeze today, quicker southward across the Treasure Coast. The more active convection will again be across the I-4 corridor where moisture remains deepest. The local HRRR is advertising an earlier start with more coverage than we have seen recently. Any activity south of I-4 will be more isolated. Primary threats remain cloud to ground lightning, torrential downpours, and brief gusty winds. Storm steering remains weak but more uniformly out of the east or northeast. Continue with some "Vicinity" wording in mainly interior TAF sites and will add tempo groups as necessary. Tempo MVFR in/around storms. Activity should diminish thru mid evening. VFR continues otherwise. && .MARINE... Current-tonight...Low-level ridge axis will slide a bit south to across the south-central FL peninsula. Very weak pressure gradient continues with winds gradually becoming onshore, remaining light, with sea breeze formation and inland movement. S/SE early evening flow will become S/SSW overnight. Seas generally 1-2 ft near shore and 2-3 ft offshore. Shower and lightning storm chances remain rather isolated. Saturday-Tuesday...With ridge axis to the north, then redeveloping well north of the waters Sunday into mid week, light E/SE winds 5-10 knots will persist, driving 2-3 foot seas. Isolated/scattered thunderstorms Saturday will increase in coverage beginning Sunday and continuing til mid week, generally favoring late night and morning hours. && .PRELIMINARY POINT TEMPS/POPS... DAB 75 91 74 89 / 10 10 10 60 MCO 76 94 75 92 / 10 40 10 60 MLB 76 90 76 89 / 10 20 10 60 VRB 74 90 73 88 / 10 30 20 60 LEE 77 95 77 93 / 20 40 10 70 SFB 76 94 76 92 / 10 30 10 60 ORL 78 94 77 92 / 10 30 10 60 FPR 74 90 74 87 / 10 30 20 60 && .MLB WATCHES/WARNINGS/ADVISORIES... FL...None. AM...None. && Watson/Sedlock/Pendergrast
Hazardous Weather Outlook...Updated National Weather Service Melbourne FL 956 AM EDT Fri Sep 4 2020 AMZ550-552-555-570-572-575-FLZ041-044>047-053-054-058-059-064-141- 144-147-050000- Flagler Beach to Volusia-Brevard County Line 0-20 nm-Volusia- Brevard County Line to Sebastian Inlet 0-20 nm- Sebastian Inlet to Jupiter Inlet 0-20 nm-Flagler Beach to Volusia- Brevard County Line 20-60 nm-Volusia- Brevard County Line to Sebastian Inlet 20-60 nm- Sebastian Inlet to Jupiter Inlet 20-60 nm-Inland Volusia- Northern Lake-Orange-Seminole-Southern Brevard-Osceola- Indian River-Okeechobee-St. Lucie-Martin-Coastal Volusia- Southern Lake-Northern Brevard- 956 AM EDT Fri Sep 4 2020 THIS HAZARDOUS WEATHER OUTLOOK IS FOR EAST CENTRAL FLORIDA. .DAY ONE...THIS AFTERNOON AND TONIGHT. .THUNDERSTORM IMPACT... Isolated to scattered lightning storms will develop this afternoon, mainly west of Interstate 95 and north of central Osceola, with slow and erratic movement. These storms will be capable of producing occasional lightning strikes and heavy downpours. Remember that lightning can strike more than 10 miles away from a storm. Head indoors at the first sign of threatening skies. .EXCESSIVE HEAT IMPACT... A period of hot conditions will develop again this afternoon as temperatures reach the lower 90s along the coast and mid 90s inland. Peak heat index values will reach between 103 to 107 almost everywhere across east central Florida. If you are outdoors today for an extended period of time, be sure to stay hydrated, take plenty of breaks in an air conditioned location, and wear light colored clothing and sunscreen. Never leave children or pets unattended in a car, even for a short period of time or even if the car is left on. Temperatures can quickly reach deadly levels! .RIP CURRENT IMPACT... There will be a Moderate risk for life-threatening rip currents at area beaches today. While rips will be present all day, the threat will be highest after 1 pm due to tidal effects. To reduce your chance of being caught in the seaward pull of a rip current, swim only within sight of a lifeguard, and never swim alone, while following social distancing guidelines. .DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY. Scattered lightning storms are forecast each afternoon and early evening through this weekend, then an increase in rain chances at the start of next week. The main hazards remain occasional to frequent lightning strikes, gusty winds, and heavy downpours. A moderate risk of dangerous rip currents is likely to continue at all east central Florida beaches through the weekend. .SPOTTER INFORMATION STATEMENT... Spotter activation will not be needed this afternoon and tonight. Sedlock/Negron
Special Weather Statement
National Weather Service Melbourne FL
322 PM EDT Fri Sep 4 2020
FLZ044-042000-
Northern Lake County FL-
322 PM EDT Fri Sep 4 2020
...SIGNIFICANT WEATHER ADVISORY FOR NORTHEASTERN LAKE COUNTY UNTIL
400 PM EDT...
At 322 PM EDT, Doppler radar was tracking a strong thunderstorm over
Pittman, or near Paisley, moving west to northwest at 5 mph.
Winds in excess of 40 mph will be possible with this storm.
Locations impacted include...
Eustis, Paisley, Pittman, Umatilla and Sellers Lake.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Torrential rainfall is also occurring with this storm, and may lead
to localized flooding. Do not drive your vehicle through flooded
roadways.
&&
LAT...LON 2896 8166 2905 8166 2905 8164 2925 8164
2897 8145 2884 8172 2896 8180
TIME...MOT...LOC 1922Z 149DEG 6KT 2902 8162
WeitlichSpecial Weather Statement
National Weather Service Melbourne FL
348 PM EDT Fri Sep 4 2020
FLZ045-042030-
Orange FL-
348 PM EDT Fri Sep 4 2020
...SIGNIFICANT WEATHER ADVISORY FOR SOUTHWESTERN ORANGE COUNTY UNTIL
430 PM EDT...
At 347 PM EDT, Doppler radar was tracking a strong thunderstorm over
Ocoee. This storm was nearly stationary.
Winds in excess of 40 mph will be possible with this storm.
Locations impacted include...
Orlando, Apopka, Ocoee, Winter Garden and Windermere.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Torrential rainfall is also occurring with this storm, and may lead
to localized flooding. Do not drive your vehicle through flooded
roadways.
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 2869 8166 2868 8146 2864 8146 2864 8145
2857 8142 2842 8147 2846 8165 2859 8165
2859 8166
TIME...MOT...LOC 1947Z 047DEG 3KT 2861 8152
WeitlichThe Melbourne radar (KMLB), 100 km away, was scanning. The volume nearest the first event began at 19:50 UTC.
1 thunderstorm wind. Local standard time, as filed.
Pieces of a metal shed were torn off and blown off during a strong thunderstorm and carried a short distance down-wind. Power lines were also downed nearby. A weather spotter in the vicinity estimated peak winds of 50 to 55 mph.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Florida in 2020Every state in 2020This day in weather historyWarnings in Florida, September 2020
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: 914979.