A thunderstorm become locally severe for a short time, resulting in quarter sized hail in St. Cloud.
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 MLB wrote it up.
A thunderstorm become locally severe for a short time, resulting in quarter sized hail in St. Cloud. Another thunderstorm produced nickel-sized hail in Altamonte Springs. Lightning struck a home in Orange County and injured a girl inside. The strike also started a small fire within the home.
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 Aug 20, 7:48 AM EST, 6 hours 12 minutes earlier.
EAST CENTRAL FLORIDA FORECAST DISCUSSION NATIONAL WEATHER SERVICE MELBOURNE FL 848 AM EDT THU AUG 20 2015 .DISCUSSION...LTST SOUNDING FROM XMR YIELDED A MOIST ATMOSPHERE WITH VERY LIGHT ENVIRONMENTAL WINDS OF 5KT OR LESS BLO H7 AND PWAT VALUE NR 2.2 INCHES. THE ONLY CONV INHIBITING FACTOR APPEARS TO BE ABNORMALLY HIGH MID LEVEL TEMP NR -5C WHICH IS ABOUT 2C ABOVE "NORMAL". A DEFINED EAST COAST BREEZE SHOULD DEVELOP LATE THIS MORNING ALONG THE CST WITH INITIAL SHOWER/STORM FORMATION AS WELL AS THE FEATURE BEGINS INLAND PROGRESSION OVER THE COASTAL COUNTIES AROUND MID DAY. GIVEN THE LIGHT FLOW...EXPECT ACTIVITY TO PUSH SLOWLY INLAND AS THE DAY PROGRESSES. OFFSHORE FLOW FM H7-H5...ESPECIALLY NORTH OF MELBOURNE...WILL SLOW THE INLAND MOVEMENT OF PCPN KEEPING COASTAL RAIN CHANCES A BIT HIGHER FROM NORTH BREVARD TO COASTAL VOLUSIA COUNTY. ERRATIC STORM MOTION WITH PROPAGATION ALONG BOUNDARIES WILL CONTRIBUTE TO A LOCALLY HEAVY RAIN THREAT WITH LOCAL AMOUNTS OF 2 TO 3" POSSIBLE IN A SHORT PERIOD OF TIME. BOUNDARY COLLISIONS WILL LEAD TO SOME STRONGER STORMS FROM MID AFTERNOON TOWARD SUNSET...WITH FREQUENT LIGHTNING AND HEAVY RAIN REMAINING THE PRIMARY THREATS...ESPECIALLY OVER THE INTERIOR. && .AVIATION...(PREV DISC) VFR THROUGH 14-15Z. SHORT DURATION MVFR CIGS POSSIBLE ALONG EAST COAST TERMINALS AS CLOUDS DEVELOP AND THICKEN ALONG THE INLAND MOVING SEA BREEZE. ISOLATED SHRA AND TSRA EARLY IN THE AFTERNOON WILL GRADUALLY INCREASE IN COVERAGE THROUGH THE AFTERNOON WITH BEST CHANCES OVER INTERIOR TERMINALS FROM LATE AFTERNOON TO SUNSET. LIGHT OFFSHORE FLOW WILL SLOW THE MOVEMENT OF THE SEA BREEZE FROM KMLB NORTH...ALLOW FOR SLIGHTLY BETTER SHRA/TSRA COVERAGE IN THIS AREA. && .MARINE... LIGHT SOUTHERLY FLOW CONTINUES TODAY WITH ENHANCED ONSHORE FLOW NEAR THE IMMEDIATE COAST AS SEA BREEZE CIRCULATION DEVELOPS FROM 11 AM THROUGH EARLY AFTERNOON. SLIGHTLY STRONGER OFFSHORE FLOW FROM THE CAPE NORTHWARD WILL KEEP SHOWER AND THUNDERSTORM DEVELOPMENT A LITTLE CLOSER TO THE COAST FROM PORT CANAVERAL NORTHWARD AS THE SEA BREEZE DEVELOPS AND PUSHES INLAND. SEAS 2 FEET NEARSHORE AND UP TO 3 FEET OFFSHORE. && .MLB WATCHES/WARNINGS/ADVISORIES... FL...NONE. AM...NONE. && JP/RW
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE MELBOURNE FL 1129 AM EDT THU AUG 20 2015 AMZ550-552-555-570-572-575-FLZ041-044>047-053-054-058-059-064-141- 144-147-202200- 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 COUNTY- NORTHERN LAKE COUNTY-ORANGE-SEMINOLE-SOUTHERN BREVARD COUNTY- OSCEOLA-INDIAN RIVER-OKEECHOBEE-ST. LUCIE-MARTIN- COASTAL VOLUSIA COUNTY-SOUTHERN LAKE COUNTY- NORTHERN BREVARD COUNTY- 1129 AM EDT THU AUG 20 2015 THIS HAZARDOUS WEATHER OUTLOOK IS FOR EAST CENTRAL FLORIDA. .DAY ONE...THIS AFTERNOON AND TONIGHT. .THUNDERSTORM IMPACT... ISOLATED LIGHTNING STORMS WILL DEVELOP ALONG THE EAST COAST SEA BREEZE AS IT BEGINS PUSHING INLAND EARLY THIS AFTERNOON. COVERAGE OF SHOWERS AND THUNDERSTORMS WILL GRADUALLY INCREASE FURTHER INLAND THROUGH LATE AFTERNOON. COVERAGE IS EXPECTED TO HIGHEST FROM ORLANDO WEST LATE AFTERNOON. THE MAIN STORM THREATS WILL BE TORRENTIAL RAIN AND FREQUENT CLOUD TO GROUND LIGHTNING. ISOLATED WIND GUSTS OF UP TO 40 MPH WILL BE POSSIBLE IN THE STRONGEST STORMS...MOST LIKELY ACROSS THE INTERIOR WHERE MORE BOUNDARY COLLISIONS WILL TAKE PLACE. WHILE THE FOCUS FOR STORMS WILL GENERALLY SHIFT WEST WITH THE INLAND MOVING SEA BREEZE...INDIVIDUAL STORM MOTION WILL BE SLOW AND ERRATIC. .FLOOD IMPACT... SLOW STORM MOVEMENT WILL LEAD TO LOCALLY HEAVY RAINFALL WITH TODAYS STORMS. AMOUNTS BETWEEN ONE AND THREE INCHES IN A 60 TO 90 MINUTE PERIOD WILL BE POSSIBLE...RESULTING IN TEMPORARY INUNDATION OF LOW LYING AND URBAN AREAS...SUCH AS ROADS...PARKING LOTS...AND CULVERTS. .RIP CURRENT IMPACT... A LINGERING SWELL WILL PRODUCE A MODERATE THREAT FOR RIP CURRENTS AT AREA BEACHES. THE RISK WILL BE HIGHEST BETWEEN 2 PM AND SUNSET DUE TO TIDAL EFFECTS. CHECK WITH YOUR LOCAL BEACH PATROL FOR MORE INFORMATION ABOUT OCEAN HAZARDS AND DO NOT ENTER THE SURF ALONE. .MARINE THUNDERSTORM GUST IMPACT... ISOLATED BRIEF WIND GUSTS TO AROUND 35 KNOTS WILL BE POSSIBLE OVER THE INTRACOASTAL WATERWAY EARLY THIS AFTERNOON THEN TOWARD LARGER INLAND LAKES FROM LATE AFTERNOON THROUGH SUNSET. .DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY. SCATTERED AFTERNOON SHOWERS AND STORMS WILL CONTINUE TO FOCUS ACROSS THE INTERIOR THROUGH SATURDAY. LIGHTNING AND HEAVY RAINFALL WILL BE THE MAIN STORM THREATS. DRIER AIR WILL MOVE INTO THE REGION ON SUNDAY AND REDUCE RAIN CHANCES INTO EARLY NEXT WEEK. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL NOT BE NEEDED TODAY. SPOTTERS ARE ASKED TO RELAY ANY RAINFALL REPORTS OF TWO INCHES OR MORE TO THE NATIONAL WEATHER SERVICE IN MELBOURNE. WIMMER .
The Melbourne radar (KMLB), 74 km away, was scanning. The volume nearest the first event began at 19:02 UTC.
2 hail, 1 lightning. Local standard time, as filed.
Lightning struck a home within eastern Orange County and started a small fire. A teenager inside the home, using a computer was injured from the lightning strike. The girl was transported to a local hospital, where she was treated and released.
A citizen observed quarter sized hail falling near the intersection of U.S. Highway 192 and Narcoossee Road in St. Cloud.
A citizen observed nickel-sized hail falling in Altamonte Springs.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Florida in 2015Every state in 2015This day in weather historyWarnings in Florida, August 2015
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: 595967, 595962, 595963.