Sea breeze collisions over the central Florida peninsula produced several severe thunderstorms in Orange and Lake counties during the late afternoon. Several reports of quarter sized hail and wind damage were received from the north Orlando suburbs.
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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.
Sea breeze collisions over the central Florida peninsula produced several severe thunderstorms in Orange and Lake counties during the late afternoon. Several reports of quarter sized hail and wind damage were received from the north Orlando suburbs. A nickel sized hail report was also received from Lake County.
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 Jul 4, 2:05 PM EST, 2 hours earlier.
Area Forecast Discussion National Weather Service Melbourne FL 305 PM EDT Tue Jul 4 2017 .DISCUSSION... Through tonight...a few cells forming as of mid afternoon. East coast sea breeze pushing inland and latest meso models continue to indicate some increase in coverage late afternoon through around sunset as the boundary reaches well inland and meets up with cells and outflows associated with west coast sea breeze as it pushes inland. Have PoPs in through sunset all areas and keep a mention in through early evening over the interior sections before activity diminishes or pushes west of east central FL. Also kept in a low PoP for the late night hours over the southern coastal sections where onshore flow and low level moisture may be sufficient to bring a few showers onshore. Wednesday...Low level ridge axis across the northern sections with E-SE flow. May be a few cells persisting in the morning over the southern sections. Position of ridge axis will allow earlier inland push of east coast sea breeze in the south, with highest coverage over the inland sections late afternoon. Have distributed highest PoPs there (40%), then gradually taper down to lowest values northern coastal sections (15-20%). High temps upper 80s-low 90s coast and low-mid 90s inland. Thu-Fri...High pressure in the mid-Atlantic will continue the ESE flow through the end of the week. Slightly lower PWAT values (1- 1.5") decreases available moisture, which lowers rain chances in the period. Best PoPs coverage Thursday is in the southern zones, along the Treasure Coast and Okeechobee County (30-40%). Friday, precip shifts inland, mainly north and west of I-4 (30-40%). Some remnant showers and storms may shift back to the coast through the afternoon. Highs in the low to mid 90s across the area with lows in the low to mid 70s. && .AVIATION...A lower coverage of SHRA/TSRA expected from mid to late afternoon, with scattered activity remaining confined to inland aerodromes (SFB- LEE-ISM-MCO). Confidence in SHRA/TSRA impacting these sites still too low to include TEMPOs at the 18Z package. Coastal sites (DAB to SUA) remain rain-free as sea breeze has already passed to their west and will continue to shift convection inland. && .MARINE...Tonight-Wednesday...Ridge axis near or just north of waters. Winds generally 10kt or less from E-SE and seas 1-2 ft near shore and up to 3 feet well offshore. Shower and storm chances over Atlantic mainly late night through morning hours. Thu-Fri...Chance of marine showers and thunderstorms mainly offshore of the Treasure Coast. Flow remains ESE at 10-15 kts and seas 2-3 feet. && .PRELIMINARY POINT TEMPS/POPS... DAB 76 89 75 90 / 10 20 10 20 MCO 75 92 75 93 / 20 30 10 20 MLB 76 88 77 89 / 10 20 10 20 VRB 76 89 75 89 / 10 30 10 30 LEE 76 93 76 94 / 20 30 20 20 SFB 75 92 75 93 / 10 30 10 20 ORL 75 92 75 93 / 20 30 10 20 FPR 76 88 75 89 / 20 30 10 30 && .MLB WATCHES/WARNINGS/ADVISORIES... FL...None. AM...None. && Glitto/Smith/Ulrich
Hazardous Weather Outlook National Weather Service Melbourne FL 547 AM EDT Tue Jul 4 2017 AMZ550-552-555-570-572-575-FLZ041-044>047-053-054-058-059-064-141- 144-147-042200- 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- 547 AM EDT Tue Jul 4 2017 THIS HAZARDOUS WEATHER OUTLOOK IS FOR EAST CENTRAL FLORIDA. .DAY ONE...TODAY AND TONIGHT. .THUNDERSTORM IMPACT... Scattered showers and lightning storms are expected to develop once again along sea and lake breezes, and thunderstorm outflow boundaries this afternoon and early this evening. Activity will be focused over the interior counties and west of interstate 95 along the Space and Treasure Coasts. The highest storm chances are expected from northern Osceola County northward across Orange Seminole, Lake and Volusia Counties, including greater Sanford, Orlando Kissimmee-Saint Cloud, Deland, Deltona and Daytona Beach. The main storm threats will be cloud to ground lightning and brief wind gusts in excess of 40 MPH. Storm motion will be slow and erratic, leading to rainfall totals between one and two inches in a 60 to 90 minute period. Move indoors if skies look threatening, or you hear thunder. .MARINE THUNDERSTORM GUST IMPACT... Thunderstorms could produce wind gusts up to 35 knots over large inland lakes this afternoon. .DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY. Scattered afternoon and early evening showers and lightning storms are forecast throughout the week, with rain chances increasing toward the upcoming weekend as a weak frontal trough approaches north Florida. Until then, storm coverage will remain highest over the interior counties. The primary threats will be dangerous lightning strikes and locally heavy rainfall, along with some brief gusty winds. .SPOTTER INFORMATION STATEMENT... Skywarn spotter networks are requested to monitor the weather today and activate should any warnings be issued for their county. This will likely be confined to Lake, Seminole, Orange, Volusia and northern Osceola Counties today. Cristaldi
Special Weather Statement
National Weather Service Melbourne FL
504 PM EDT TUE JUL 4 2017
FLZ045-042145-
Orange FL-
504 PM EDT TUE JUL 4 2017
...SIGNIFICANT WEATHER ADVISORY FOR SOUTHWESTERN ORANGE COUNTY UNTIL
545 PM EDT...
At 504 PM EDT, Doppler radar was tracking a strong thunderstorm over
Orlando Executive Airport, or over Azalea Park. This storm was nearly
stationary.
Winds in excess of 40 mph will be possible with this storm.
Locations impacted include...
Orlando, Winter Park, Maitland, Wedgefield and Bithlo.
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.
Excessive cloud to ground lightning is occurring with this storm.
Lightning can strike many miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle at the first sound of thunder.
&&
LAT...LON 2864 8146 2863 8133 2861 8132 2861 8109
2835 8111 2835 8151
TIME...MOT...LOC 2104Z 086DEG 1KT 2855 8133
BragawThe Melbourne radar (KMLB), 86 km away, was scanning. The volume nearest the first event began at 21:03 UTC.
3 hail, 2 thunderstorm wind. Local standard time, as filed.
Broadcast Media relayed several images and a video on Twitter of several large downed trees in the Winter Park area. Several pictures showed large downed trees blocking Lee Road and Edwin Boulevard.
Broadcast Media relayed video of nickel sized hail in a suburban area near the intersection of State Road 423 and Interstate 4.
Broadcast Media relayed a report via Twitter of quarter sized hail in Maitland.
Broadcast Media relayed reports via Twitter of a downed tree and downed power lines in South Apopka. The power lines were downed across 15th street and Central Avenue, while the downed tree was on Chisholm Street.
A trained spotter reported was driving along US Highway 27 just south of Leesburg when he reported nickel sized hail. The spotter also reported that hail was becoming larger than nickel sized when he decided to turn around.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Florida in 2017Every state in 2017This day in weather historyWarnings in Florida, July 2017
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: 698532, 698533, 698534, 698535, 698536.