A weather spotter observed a funnel cloud near Fort Drum as he was was driving northward on US Highway 441.
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The episode as NWS MLB wrote it up.
A weather spotter observed a funnel cloud near Fort Drum as he was was driving northward on US Highway 441.
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 24, 8:28 AM EST, 1 hour 37 minutes earlier.
Area Forecast Discussion...UPDATED National Weather Service Melbourne FL 928 AM EDT Thu Aug 24 2017 .DISCUSSION... Current-Today...Weak surface high pressure ridging continues just north of the area as a quasi-stationary frontal boundary lies across the Deep South and southeast U.S. Weak low pressure and associated inverted troughing are located off of the FL west coast. The 10Z KXMR sounding shows a PWAT of 1.75 inches and continued warm air aloft in the mid-levels (+9.5C/-6.5C) at 700/500mb. 915 MHZ Cape wind profilers show a deep southeasterly flow (5-10 kts) from just above the surface through 10.0 Kft. Deep moisture remains forecast across ECFL over the next 24 hours with values approaching/exceeding 2 inches areawide. Nexrad 88D shows scattered showers/isolated thunder over our southern coastal waters and along the Treasure Coast southward. The local HRRR model shows increasing coverage of convection south of Orlando into the afternoon and concentrating into west central FL by late in the day (similar to Wednesday). MOS PoPs remain high, potentially too high near the immediate Space/Volusia coasts and will contemplate lowering these values with a future late morning zones update. There will remain a threat for locally heavy rainfall across the Treasure Coast and interior reaches this afternoon/early evening. Highs wil be in the lower 90s nrn areas to near 90 to the upper 80s for Okeechobee county and the Treasure coast. An east swell will continue a moderate risk for rip currents at east central FL beaches. Tonight...Previous...A cyclonic circulation/low at H9-H8 will move from Tampa toward Orlando overnight and focus low-mid level southwest flow across southern sections in an area of deep moisture. This should allow for a chance of showers and storms from Okeechobee toward the Treasure coast through the overnight hours. Will continue some low pops across nrn sections into late evening with a slight chance of a shower or thunderstorm but this activity should diminish by late evening. Lows mainly in the mid 70s. && .AVIATION...Showers/isolated thunder affecting TAF sites early this morning across the Treasure Coast. Local mesoscale models continue to show a scenario similar to Wed with higher coverage southward and into the interior this afternoon/early evening. Threats to aviation remain heavy downpours, occasional lightning, and locally gusty winds. MVFR/IFR conds in/around convection. Light morning winds to become light ESE/SE across the area today. Previous...Highest overnight convective chances tonight will occur from KSUA-KVRB with deep moisture and SW low lvl flow above the sfc. Convection should diminish by late evening north of a KISM-KTIX line. && .MARINE...Today...Weak surface ridge axis just north of the area. Weak low pressure/inverted trough axis off of the west central FL coast. Deep moisture in place with SCT-NMRS showers/ISOLD storms, especially south of the Cape. SE/S flow 10-15 kts. Seas generally 2- 3 ft, perhaps 4 ft well offshore. Tonight...Previous...SE-S winds to 10-15 knots will veer to the S-SW overnight. Expect a high coverage of showers/storms across the srn waters through the late night hours. && .MLB WATCHES/WARNINGS/ADVISORIES... FL...None. AM...None. && Sedlock/Lascody
Hazardous Weather Outlook National Weather Service Melbourne FL 430 AM EDT Thu Aug 24 2017 AMZ550-552-555-570-572-575-FLZ041-044>047-053-054-058-059-064-141- 144-147-250000- 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- 430 AM EDT Thu Aug 24 2017 THIS HAZARDOUS WEATHER OUTLOOK IS FOR EAST CENTRAL FLORIDA. .DAY ONE...TODAY AND TONIGHT. .THUNDERSTORM IMPACT... Low level south to southeast flow around a weak low pressure area off the southwest Florida coast will advect high moisture across much of east central Florida today. Scattered showers and isolated lightning storms will be possible near the Treasure coast this morning and then develop westward into the interior through the afternoon hours. The main thunderstorm hazards will be locally heavy rain, gusty winds and occasional cloud to ground lightning strikes. .FLOOD IMPACT... A few heavier showers and stronger storms may produce locally heavy rainfall up to two inches. Any heavy rain may cause ponding of water on roadways and minor flooding of poor drainage areas. .RIP CURRENT IMPACT... Ocean conditions will produce a moderate risk of rip currents today. The rip currents are expected to be strongest in the mid to late afternoon due to tidal effects. Remember to swim near a lifeguard. .DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY. A weak area of low pressure along with deep tropical moisture is expected near central Florida on Friday and will move northeast across the Atlantic through early next week. High rain chances will continue through the weekend with locally heavy rainfall possible over the next several days. Gusty winds and lightning will also accompany stronger storms. An east swell will heighten the rip current risk through the start of the weekend. .SPOTTER INFORMATION STATEMENT... Spotter activation will not be needed today. Volkmer
The Melbourne radar (KMLB), 74 km away, was scanning. The volume nearest the first event began at 15:05 UTC.
1 funnel cloud. Local standard time, as filed.
A weather spotter observed a funnel cloud to his north as he was driving on US Highway 441 at the intersection of NE 240th Street, south of Fort Drum.
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, August 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: 717927.