A surface front continued to meander near the FL-GA state line. This feature combined with a very saturated airmass and slow steering flow promoted pockets of heavy rainfall where diurnally enhanced convection developed across NE FL.
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 JAX wrote it up.
A surface front continued to meander near the FL-GA state line. This feature combined with a very saturated airmass and slow steering flow promoted pockets of heavy rainfall where diurnally enhanced convection developed across NE FL.
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 Jacksonville, FL wrote its last area forecast discussion before the first event at Sep 8, 11:13 AM EST, 7 minutes earlier.
Area Forecast Discussion National Weather Service Jacksonville FL 1213 PM EDT Sun Sep 8 2024 ...HEAVY DOWNPOURS AND LOCALIZED FLOODING POSSIBLE THROUGH EARLY THIS EVENING FOR LOCATIONS SOUTH OF I-10... ...BREEZY ONSHORE WINDS FOR COASTAL SOUTHEAST GA ON MONDAY ... ...PERIODS OF DOWNPOURS EXPECTED THROUGHOUT THE WEEK ACROSS NORTHEAST AND NORTH CENTRAL FL... For the latest NE FL and SE GA Daily Key Messages please visit: https://www.weather.gov/media/jax/briefings/nws-jax-briefing.pdf .UPDATE... Issued at 1214 PM EDT Sun Sep 8 2024 Early afternoon surface analysis depicts a stalled frontal boundary positioned along the FL/GA border. Meanwhile, high pressure (1025 millibars) was centered over the Mid-Mississippi Valley in the wake of this stalling boundary and was building east-southeastward towards the Ohio and Tennessee Valleys. Otherwise, low pressure (1003 millibars), designated by the National Hurricane Center as Invest 91L, was slowly organizing over the Bay of Campeche (southwestern Gulf of Mexico). Aloft...troughing continues to pivot across Quebec, with the base of this trough extending southward through the Carolinas. Meanwhile, the axis of Atlantic ridging remains stretched across the Bahamas, south FL and into the far southeastern portions of the Gulf of Mexico. This weather pattern continues to create deep west-southwesterly flow throughout our area, keeping PWATS above 2 inches for locations south of Waycross. Flow aloft continues to create isentropic lift / overrunning across southeast G, where waves of light to moderate stratiform rainfall continue to stream northeastward, mainly across inland locations. A warm, humid and unstable air mass persists across northeast and north central FL, with mostly stratiform light rainfall impacting the Interstate 10 corridor, while convection was developing along the I-95 corridor in St. Johns County as well as along the Atlantic coast in Duval County. Temperatures at noon remain in the 70s for locations north of the front in southeast GA as well as along the I-10 corridor, where stratiform rainfall is occurring. Temperatures have risen to the low and mid 80s for locations south of I-10, where dewpoints where in the mid to upper 70s. Shortwave energy embedded within the deep west-southwesterly flow aloft will trigger an increasing coverage of convection this afternoon for locations south of the frontal boundary in northeast and north central FL. Downpours in this warm and exceptionally humid environment will have the potential to train repeatedly over the same locations, especially across north central FL and for locations along the I-95 corridor. Rainfall amounts of 1-2 inches are expected at these locations through early this evening, with locally higher totals of 3-4 inches being possible where downpours repeatedly train over the same locations. Localized flooding will be the main threat through around sunset, especially at urban and coastal locations along the I-95 corridor and south of the I-10 corridor. An isolated strong storm or two will be possible across north central and coastal northeast FL, where cell mergers could yield a wet microburst that would potentially contain 40-50 mph winds, along with frequent lightning strikes. Rainfall will continue to remain largely stratiform and lighter in nature for locations along and north of the Interstate 1o corridor, although a few embedded downpours / isolated elevated convection cannot be ruled out through this evening. Plenty of cloud cover and rainfall will keep highs in the 70s today for most of southeast GA and also northern portions of the Suwannee Valley, while highs climb to the mid and upper 80s south of the stalled front across north central FL. Afternoon and evening convection are expected to wane across northeast and north central FL before midnight tonight, with isentropic lift / overrunning keeping chances for light rainfall and sprinkles in place across southeast GA. Meanwhile, high pressure building east-southeastward towards the Ohio and Tennessee Valleys will begin to wedge down the southeastern seaboard during the overnight and predawn hours, with strengthening low level convergence potentially developing convection before sunrise along the southeast GA coast. Locally heavy downpours could impact the morning commute along the I-95 corridor in southeast GA as northeasterly winds become breezy towards sunrise. Otherwise, a drier air mass may cross the Altamaha / Ocmulgee Rivers later tonight, potentially dropping lows to the upper 60s at inland locations, especially for areas north of Waycross. Lows elsewhere will generally fall to the low and mid 70s, with a few upper 70s possible at coastal locations. && .SHORT TERM... (Monday through Tuesday night) Issued at 405 AM EDT Sun Sep 8 2024 The core of a strong mid/upper level trough will lift north from New Brunswick across the St Lawrence river valley through Quebec Monday while elongating southward along the east coast with ridging in it's wake shifting into the Midwest and Great Lakes. This will allow surface high pressure to build eastward through the OH river valley Monday and cause the stalled frontal boundary to sink into central FL late in the day as a surge of northeasterly winds sink down the SE coast into the area. High moisture levels, shortwave energy and increasing NE winds/convergent flow along the coast will induce convergent rain bands moving onshore with embedded T'storms, with coastal convergent showers continuing to move onshore overnight from the coast to about US-17. Cloudy skies will keep highs below normal in the upper 70s to low 80s over SE GA and low to mid 80s over NE FL. Tuesday, the surface high north of the region over the central Appalachians will move gradually across the Shenandoah Valley to the Delmarva peninsula which will press the frontal boundary south of I-4 in central FL with a drier airmass filtering into interior SE GA with dewpoints mixing down into the 60s. This will present a gradient of shower coverage with highest chances south of a line from Gainesville to Jacksonville while coverage decreases with NW extent to isolated/scattered levels before drying out NW of US-84. Scattered embedded storms possible over north central FL closer to the front where higher moisture and instability will reside. Winds will be breezy along the coast and the St Johns river 15-20 mph with gusts to 30 mph. Below normal highs anticipated on Tuesday in the low/mid 80s for the majority of the area with upper 80s over north central FL. Lows will begin in the mid 60s over inland SE GA Tuesday morning and the low/mid 70s over NE FL and the coast. && .LONG TERM... (Wednesday through Saturday) Issued at 405 AM EDT Sun Sep 8 2024 Ridging aloft from the Appalachian mountains to the east coast will flatten to the north and shift into the western Atlantic Wednesday into Thursday. This will move high pressure centered initially over near the Delmarva coast ENE into the western Atlantic waters as a tropical low develops far to our west near the TX Gulf coast. Flow will transition to more easterly through the week and remain breezy, especially along the coast as the low to the west moves NE into the lower MS valley before weakening. The frontal boundary will will lift back towards the area Thursday and lift north of the area Friday into Saturday as the remnants of the low moves NE towards the TN river valley by Saturday. Highest chances for rain and storms will be Wednesday into Friday as the front lifts northward and flow becomes south to SW aloft over a rich airmass with PWATs above 2.0 inches. Increasing shear of 20-30 knots may present a risk for strong T'storms, especially along the proximity of the front. The elevated onshore flow will bring rough surf conditions and high rip current risk during the period from Tuesday through next weekend. Temperatures during the period will feature highs about 5 or so degrees below normal with low to mid 80s for most of the area with warmer highs in the upper 80s across the southern St Johns river basin warming to near normal highs in the upper 80s by Friday and Saturday. Lows will begin a bit below normal over inland SE GA and return to near normal during the week while staying near to a bit above normal over NE FL. && .AVIATION... (12Z TAFS) Issued at 813 AM EDT Sun Sep 8 2024 Occasional light showers will impact SSI and GNV this morning, with occasional MVFR visibilities expected at SSI, while VFR conditions prevail elsewhere. Showers and thunderstorms are then expected to overspread the regional terminals after 15Z, with TEMPO and PROB30 groups for MVFR to IFR conditions during heavier downpours, along with briefly gusty winds, extending through around 00Z. Showers and thunderstorms may linger at the Duval County terminals and SGJ into the evening hours, but confidence was too low to include anything other than vicinity coverage at this time. Showers and possibly a few embedded thunderstorms will then develop after midnight around the SSI terminal, with convection potentially lingering through the predawn hours on Monday as a north-northeasterly wind surge moves across the southeast GA coast. MVFR ceilings will otherwise prevail this evening outside of any lingering convection, with IFR conditions expected to develop after 07Z at VQQ and GNV. Northeasterly surface winds of 5-10 knots will develop by 15Z today at the regional terminals, with speeds diminishing to around 5 knots or less overnight at the northeast FL terminals. && .MARINE... Issued at 1214 PM EDT Sun Sep 8 2024 Showers and thunderstorms will continue across our local waters through this evening due to a stalled frontal boundary that is situated across the northeast Florida waters. Seas of 3-5 feet will prevail both near shore and offshore through tonight. Meanwhile, high pressure building towards the Ohio and Tennessee Valleys in the wake of this frontal boundary today will begin to wedge down the southeastern seaboard on Monday, resulting in strengthening northeasterly winds across the Georgia waters by the afternoon hours, where wind speeds may increase to Small Craft Advisory levels of around 20 knots. Seas will build to Caution levels of 4-6 feet across the Georgia waters by Monday afternoon, with seas remaining in the 3-5 foot range for the northeast FL waters. High pressure center will then pivot towards the Mid-Atlantic coast by Tuesday and Wednesday as it strengthens slightly, likely resulting in strengthening onshore winds for the northeast Florida waters by Tuesday, where Small Craft Advisory conditions may develop. Waves of showers and thunderstorms will continue through the week as the stalled frontal boundary begins to lift northward late this week. Otherwise, winds will likely shift to southeasterly late this week as a developing tropical cyclone over the southwestern Gulf of Mexico lifts northward towards the upper Texas or Louisiana coasts. Rip Currents: Onshore winds will combine with a northeasterly ocean swell to create a moderate rip current risk at all area beaches today. Strengthening northeasterly winds and building seas on Monday may create a high risk at the southeast GA beaches, with a higher end moderate risk currently anticipated at the northeast FL beaches. Persistent onshore winds and rough surf will likely result in a high risk at all area beaches from Tuesday through at least Wednesday, possibly extending through week's end. && .HYDROLOGY... Issued at 405 AM EDT Sun Sep 8 2024 The heaviest rainfall amounts today looks to be across parts of southern Duval, St Johns, Flagler, Putnam, and Marion counties as deeper convection develops there this afternoon and the evening hours. Forecast rainfall amounts are up to around 1-2 inches in these areas, but localized flooding will be possible with potential amounts up to 2-4 inches. As for the St Johns River, water levels are generally in the action stage in the mid and lower St Johns. Levels may be trending gradually upwards Monday through Wednesday as waters are trapped from the northeast flow. && .PRELIMINARY POINT TEMPS/POPS... AMG 77 67 79 65 / 70 50 20 10 SSI 80 72 79 74 / 70 60 70 30 JAX 83 72 81 73 / 80 60 70 40 SGJ 84 74 84 75 / 80 70 80 50 GNV 83 72 84 72 / 80 50 80 10 OCF 86 74 86 74 / 80 50 60 10 && .JAX WATCHES/WARNINGS/ADVISORIES... FL...None. GA...None. AM...None. &&
The national radar mosaic for the moment the first event began.
2 flood, 1 heavy rain. Local standard time, as filed.
A personal weather station Flagler Beach - | KFLFLAGL79 measured 4.15 inches of rain. | Rain began at 1220 PM. About 2 inches fell | between 1 PM and 2 PM. Surrounding sites | measured 3.5 to 4.1 inches of rain. Minor | street flooding was reported in the area.
AT 3:45 pm, emergency management shared a photo of flood water flowing over Lantana Avenue about 1 mile NW of Flagler Beach. A spotter also reported about 3 inches of water on Flagler Avenue. At 4:24 pm, a spotter reported deep ponding on Florida Park Dr and Clubhouse Dr near the intersection with | Palm Coast Pkwy. Flooding was also reported | along Pritchard Dr between Belle Terre Pkwy | and Providence Ln. Roads are passable. | Swales were overflowing into streets in the | B, W, and L sections of Palm Coast but did not cover the | roads.
Hunter road was reported to be underwater | for several miles. Water was deep and moving | swiftly. Around 10 PM, a swift water rescue | was conducted by airboat to rescue two | people whose car was stranded in the | floodwaters along Hunter Rd. The people were | rescued from the roof of their car. Hunter | Rd has been closed due to impassable | flooding.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Florida in 2024Every state in 2024This day in weather historyWarnings in Florida, September 2024
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: 1213993, 1213987, 1213992.