Persistent thunderstorms produced heavy rain for several hours across far western Martin County, adjacent to Lake Okeechobee. Flooding of roadways, drainage canals and low-lying areas occurred, with water entering a fish camp.
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The episode as NWS MLB wrote it up.
Persistent thunderstorms produced heavy rain for several hours across far western Martin County, adjacent to Lake Okeechobee. Flooding of roadways, drainage canals and low-lying areas occurred, with water entering a fish camp.
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 6, 1:02 PM EST, 2 hours 25 minutes earlier.
Area Forecast Discussion National Weather Service Melbourne FL 202 PM EDT Sun Sep 6 2020 .DISCUSSION... Current-Tonight...USAF Cape wind profilers continue to show a light (5-10 kts) NE/E component of wind just off the deck up through 10.0 Kft. Deep moisture continues to pool across the region ahead of the slowly weakening TUTT low approaching south FL. Nexrad 88D continues to show scattered showers and isolated lightning storms over the local coastal waters and increasing coverage over land of diurnal convective activity that is moving west/southwest. By sunset, the east coast sea breeze and associated diurnal activity should be west of the Kissimmee River. The focus for any shower/storm activity will revolve around any onshore moving convection. Much of this will diminish as it tries to move deeper into the interior, though some isolated cells may be successful. They will be aided by deep moisture, impulses aloft, weak coastal convergence late in the night, and deep but weak onshore flow. Primary impacts from any isolated lightning storms will be occasional lightning, brief (locally) gusty winds and moderate to localized downpours. Conditions remain warm and muggy overnight with lows in the 70s areawide. Monday-Wednesday...Weakening/deforming TUTT cell will drift slowly northward over Florida through mid week as the Atlantic ridge builds NE of Florida. A surface inverted trough well NE of the Bahamas will drift slowly west and then NW toward the SE CONUS, with its axis reaching Florida by Wed. Pattern will feature increasing moisture in a developing onshore flow. This continues to point to increasing rain chances through mid week, with the highest chances Wed. The latest forecast is consistent with the previous one, which undercuts NBM by 10-20 percent throughout, although Wed POPs may eventually need to be nudged upward a bit. Increasing clouds and rain chances should cause max temps to drop back closer to normal, mins slightly above. Thursday-Sunday...Mid level ridge will extend from the western Atlantic into the SE CONUS in the wake of the washed out TUTT. Persistent SE flow on the western flank of the ridge maintains deep moisture in place, which will keep above normal shower and storm chances in the forecast through the end of the week. Temps will average slightly above normal into next weekend. && .AVIATION...Southwest moving marine showers early this afternoon may briefly impact coastal terminals, with occasional lightning strikes possible, generally south of TIX. Through the remainder of the afternoon, coverage of SHRA/TSRA will increase towards interior terminals, although confidence is too low to include TEMPO vis/cig reductions, as most activity will generally remain south of MCO. Will carry vicinity thunder through sunset, with east winds becoming light and variable overnight. Tomorrow, coverage of showers and storms looks more favorable areawide, so introducing VCSH at coastal terminals in the morning. && .MARINE...Afternoon-tonight...Weak surface pressure gradient remains across the area. Onshore winds near the coast with sea breeze formation and inland propagation. Larger picture shows deepening onshore flow (NE/E) across the local coastal waters. The wind forecast calls for light onshore winds, though with the pgrad so weak there likely will be some variability to the light winds. Shower and isolated lightning storm activity will begin to increase late tonight into Mon with the approach of a weakening upper low from the south. Seas generally 2 ft near shore and 2-3 ft well offshore. Monday-Thursday...Light onshore ESE-SE flow around 10kt or less prevails well into the week, which will keep seas AOB 3ft. With deeper moisture in place, precip coverage will be higher than in previous days (scattered showers/isolated storms) through the period. Model guidance now shows a weak low developing at the NE end of the trough axis (well offshore) possibly owing to a combination of weak forcing on the divergent east side of the TUTT axis, and possible warm core feedback. May need to watch for potential marine impacts (swell) should this low become a little more robust than currently indicated. && .PRELIMINARY POINT TEMPS/POPS... DAB 76 87 75 88 / 40 70 40 70 MCO 76 89 75 90 / 20 70 20 70 MLB 78 87 77 88 / 30 70 40 70 VRB 76 88 75 89 / 30 70 40 70 LEE 76 90 75 90 / 20 70 20 70 SFB 75 90 74 91 / 30 70 30 70 ORL 76 89 75 90 / 20 70 20 70 FPR 76 89 76 89 / 30 70 40 70 && .MLB WATCHES/WARNINGS/ADVISORIES... FL...None. AM...None. && ALL FORECAST GRIDS...Sedlock RADAR/IMPACT WEATHER....Pendergrast AVIATION...Smith
Hazardous Weather Outlook...Updated National Weather Service Melbourne FL 1141 AM EDT Sun Sep 6 2020 AMZ550-552-555-570-572-575-FLZ041-044>047-053-054-058-059-064-141- 144-147-070000- 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- 1141 AM EDT Sun Sep 6 2020 THIS HAZARDOUS WEATHER OUTLOOK IS FOR EAST CENTRAL FLORIDA. .DAY ONE...THIS AFTERNOON AND TONIGHT. .THUNDERSTORM IMPACT... Isolated lightning storms will affect parts of east central Florida. These will develop mainly west of Interstate 95 and move to the west southwest at 5 to 10 mph. Primary storm threats will include occasional lightning strikes, gusty winds and moderate to 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... Another hot day today with periods of heat indices between 99 to 105. If you are outdoors 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 from 2:30 PM through sunset 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...MONDAY THROUGH SATURDAY. Numerous showers and scattered lightning storms are forecast each afternoon and early evening through most of the new 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 into early next week. .SPOTTER INFORMATION STATEMENT... Spotter activation will not be needed this afternoon and tonight. Sedlock/Negron
The national radar mosaic for the moment the first event began.
1 flood. Local standard time, as filed.
Persistent, heavy thunderstorms dropped between four and six inches of rain across far western Martin County between 1400 and 1700LST, as measured by two rain gauges. Roadways, drainage canals and low spots were flooded and water entered into the bar area of the J&S Fish Camp.
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: 915126.