A severe thunderstorm that produced strong winds and quarter-sized hail in Kissimmee developed after the east and west coast sea breezes collided.
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The episode as NWS MLB wrote it up.
A severe thunderstorm that produced strong winds and quarter-sized hail in Kissimmee developed after the east and west coast sea breezes collided.
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 28, 2:29 PM EST, 5 hours 2 minutes earlier.
Area Forecast Discussion National Weather Service Melbourne FL 329 PM EDT Sun Jul 28 2019 .DISCUSSION... Current...Slow moving showers and a few storms will continue to drift toward the east through nightfall. Activity will be sustained by outflows and some larger scale breeze interactions possible through dusk before decreasing in coverage this evening. Activity not expected to become very strong and lightning/locally heavy rain will be the primary concerns. Tonight...Most all pcpn should wrap up over land areas by around 10 pm, and a slight chc of storms will continue over the marine areas into early Monday. Expect partly cloudy skies overnight with lows in the L-M70s. modified prev disc... Mon/Tue...Remnant frontal trof extending from the Tampa Bay vcnty to just north of Cape Canaveral will break down and fill in as the wrn flank of the Atlc ridge axis rebuilds into central FL. H100-H70 flow vrbl AOB 5KTS on Mon, gradually bcmg S/SE on Tue 5-10KTS. Weak SWrly flow thru the H85-H50 steering lyr with mean wind speeds arnd 10KTS will not be strong enough to push diurnal convection back to the coast once the sea breeze pushes inland...PoPS will favor the interior counties each day. Moisture lvls acrs the region are near avg for late July, though PWats do drop to arnd 1.50" acrs the Keys...H100-H70 mean RH arnd 70pct...H85-H50 dewpoint depressions btwn 5-10C. Modest mid lvl instability with H70 temps arnd 9C and H50 arnd -8C, yielding lapse rates btwn 6.0-6.5C/KM each aftn. Both GFS/ECMWF indicate the H30- H20 jet pattern will maintain weak divergence aloft. PoPs btwn 40-60pct on Mon with PWat values arnd 2.00"...dropping to 40/50pct on Tue as slightly drier air works its way into the peninsula (PWat arnd 1.75") Primary threat will be flooding rain due to the weak steering flow and resultant slow storm motion. Strong wind gusts psbl as mid lvls entrain relatively high dewpoint depressions arnd 10C. Temps near avg for late July. Wed/Sat...Wrn flank of the Bermuda ridge will slowly lift into north FL but will remain in relatively close as a persistent mid lvl troffing pattern dvlps east of the MS River. Low and mid lvl flow pattern will continue to favor the interior counties as weak S/SE flow prevails thru both the H100-H70 and H85-H50 lyrs...allowing both sea breezes to make good inland progress each aftn. Daily storm coverage will largely depend on the timing of low lvl moisture waves, but largely will range from 40/50pct along the coast and 50- 60pct inland. Tropical wave present in the deep easterlies is forecast to near the Bahamas late in the week expected to show some development and should an area of low pressure form, it could enter the FL Straits and Northern Bahamas areas around Friday/Sat. && .AVIATION...Isolated to scattered showers and storms will continue to develop through late afternoon and early evening, mainly across the interior. Any of this activity will produce tempo IFR/MVFR conditions. Have VCTS for most TAF sites due to the more limited/spotty coverage of this activity, but may need to add tempo groups as needed. Convection should again weaken through the evening, with VFR conditions expected overnight. && .MARINE... Tonight...Seas around 2 ft over most of the waters with a 9-10 sec swell present into Monday. Mon-Fri...Atlc ridge axis will rebuild acrs the FL Peninsula thru first part of the week. Light E/NE breeze on Mon will veer to the SE Mon night into Tue. Thru midweek, winds will meander btwn S/SE thru the overnight pds and E/SE thru the day pds as the seabreeze circulation sets up...generally AOB 12kts. Seas Around 2FT nearshore and 2-3FT offshore. Sct shras/tsras thru the pd. && .PRELIMINARY POINT TEMPS/POPS... DAB 74 87 74 89 / 30 40 30 40 MCO 74 93 74 93 / 30 60 30 50 MLB 74 90 75 90 / 20 40 30 40 VRB 72 91 73 91 / 20 40 30 40 LEE 74 92 74 94 / 30 40 30 50 SFB 74 92 75 93 / 20 50 30 50 ORL 75 93 75 93 / 30 60 30 50 FPR 72 91 73 91 / 20 40 30 40 && .MLB WATCHES/WARNINGS/ADVISORIES... FL...None. AM...None. && JP/PG/DKW
Hazardous Weather Outlook National Weather Service Melbourne FL 1123 AM EDT Sun Jul 28 2019 AMZ550-552-555-570-572-575-FLZ041-044>047-053-054-058-059-064-141- 144-147-282200- 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- 1123 AM EDT Sun Jul 28 2019 THIS HAZARDOUS WEATHER OUTLOOK IS FOR EAST CENTRAL FLORIDA. .DAY ONE...THIS AFTERNOON AND TONIGHT. .THUNDERSTORM IMPACT... Scattered lightning storms will develop early this afternoon along the east coast sea breeze with coverage and intensity of storms increasing over inland areas by mid afternoon into this evening. Frequent lightning and torrential downpours are the main hazards, but some strong storms will also be capable of wind gusts up to 50 mph. If threatening weather approaches, seek shelter in an enclosed building. Picnic shelters and porches may keep you dry but are not safe from the dangers of lightning. .FLOOD IMPACT... Locally heavy downpours of 1 to 3 inches of rain in a short duration may accompany some storms today, especially inland where multiple boundaries interact. This could lead to ponding of water on roadways, parking lots, and other poorly drained and low- lying areas. .RIP CURRENT IMPACT... Tide and ocean conditions will produce a moderate risk of rip currents at the beaches of east central Florida. While the dangerous rip currents will be present all day, the highest risk for rip currents will be through 2 pm this afternoon due to tidal effects. Always swim within site of a lifeguard, and never swim alone. .MARINE THUNDERSTORM GUST IMPACT... Storms will be capable of wind gusts over 35 knots mainly over large inland lakes today but also the Intracoastal Waterway and nearshore Atlantic waters early this afternoon. .DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY. Scattered to numerous showers and storms are expected each day through this week with higher chances favoring the interior. The main storm hazards will continue to be dangerous cloud to ground lightning strikes, gusty winds and locally heavy rain. .SPOTTER INFORMATION STATEMENT... Spotter activation will not be needed this afternoon and tonight. Pendergrast
Special Weather Statement National Weather Service Melbourne FL 620 PM EDT Sun Jul 28 2019 FLZ044-144-282300- Northern Lake County FL-Southern Lake County FL- 620 PM EDT Sun Jul 28 2019 ...SIGNIFICANT WEATHER ADVISORY FOR WEST CENTRAL LAKE COUNTY UNTIL 700 PM EDT... At 619 PM EDT, Doppler radar was tracking a strong thunderstorm near Adamsville, moving east at 10 mph. Half inch hail and winds in excess of 40 mph will be possible with this storm. Locations impacted include... Leesburg, Lady Lake, Lake Griffin, Emeralda and The Villages. 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 2896 8195 2896 8182 2869 8184 2869 8195 TIME...MOT...LOC 2219Z 260DEG 9KT 2880 8201 Weitlich
The Melbourne radar (KMLB), 79 km away, was scanning. The volume nearest the first event began at 00:31 UTC.
2 thunderstorm wind, 1 hail. Local standard time, as filed.
The AWOS at the Kissimmee Gateway Airport (KISM) measured a peak wind gust of 58 mph from the northwest.
The AWOS at the Kissimmee Gateway Airport (KISM) measured a peak wind gust of 64 mph from the north-northwest.
Kissimmee Utility Authority relayed reports of hail up to quarter size in Kissimmee.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Florida in 2019Every state in 2019This day in weather historyWarnings in Florida, July 2019
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: 831282, 831284, 831307.