A stalled front across the area and weak steering flow produced storms with locally heavy rainfall.
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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 JAX wrote it up.
A stalled front across the area and weak steering flow produced storms with locally heavy rainfall.
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 Aug 20, 8:37 PM EST, 2 hours 23 minutes earlier.
Area Forecast Discussion National Weather Service Jacksonville FL 937 PM EDT Tue Aug 20 2024 ...New UPDATE... .UPDATE... Issued at 919 PM EDT Tue Aug 20 2024 For the latest NE FL and SE GA Daily Key Messages please visit: https://www.weather.gov/media/jax/briefings/nws-jax-briefing.pdf No major changes to the forecast for the evening update as last few showers weaken over the southern florida coastal waters through midnight with mostly clear skies for most and near to a bit above normal lows in the low 70s inland and the mid to upper 70s along the coast and the St Johns river. A cold front will slide south into north central and NE FL on Wednesday with onshore northeasterly winds 10-15 mph behind the front. This will bring a round of showers and embedded T'storms from the SE GA coast midday south and west into inland NE FL towards I-75 by mid afternoon. Highs will be near normal along the coast from the onshore flow and a little above normal over inland NE FL with mid 90s and low 90s over inland SE GA. && .NEAR TERM... (through Tonight) Issued at 315 PM EDT Tue Aug 20 2024 The frontal boundary will remain stationed across NE FL through the rest of the day, lingering dry air behind the frontal boundary will continue to keep chances of precipitation at bay for most locations north of the I-10 corridor through the rest of today. Elsewhere, showers and storms will be possible during the afternoon as the westerly flow ahead of the frontal boundary will continue to see some showers and storms moving eastward over north central Florida. As the Atlantic sea breeze begins to move inland, some showers and storms will likely begin to move inland towards the I-95 corridor. Daytime temperatures still look to top out near the mid 90s across interior locations, with the east coast sea breeze keeping coastal locations in the lower 90s. By the overnight hours, lows will primarily be in the lower 70s for interior locations and the mid to upper 70s along intracoastal and coastal locations. && .SHORT TERM... (Wednesday through Thursday night) Issued at 315 PM EDT Tue Aug 20 2024 Troughing aloft will begin to cutoff from the main flow pattern across the Mid-Atlantic states and New England on Wednesday, with flow aloft at the base of this trough backing from northwesterly to west-southwesterly across our area by the afternoon hours. This backing of the flow aloft will allow a frontal boundary to stall across north central FL, while surface ridging building over the Great Lakes states begins to wedge down the southeastern seaboard. This change in the weather pattern will result in a tightening local pressure gradient, creating breezy northeasterly winds before the noon hour across coastal southeast GA, followed by breezy conditions spreading down the I-95 corridor during the afternoon hours. PWAT values will tick upwards during the afternoon hours, with forcing from the stalled frontal boundary and shortwave energy diving towards the southeastern states creating at least widely scattered showers and thunderstorms during the afternoon and evening hours. Activity initially developing along the I-95 corridor during the early to mid afternoon hours should tend to concentrate across inland locations west of I-95 by late afternoon and early evening. Highs will climb to the low and mid 90s for locations west of I-95, while developing onshore winds keep coastal highs generally in the upper 80s. Maximum heat index values will top out around 105 degrees at inland locations, with coastal values around 100. An onshore breeze will persist on Wednesday night, with increasing low level moisture values potentially advecting occasional scattered showers onshore along the Atlantic coastal counties overnight. Lows will mainly fall to the lower 70s inland, while onshore winds keep coastal lows mainly in the upper 70s. Shortwave energy diving into the southeastern states will begin to cut off from the main flow pattern on Thursday, shifting flow aloft to southwesterly. The frontal boundary will essentially remained stalled along and south of I-10, and breezy northeasterly winds will persist along the I-95 corridor as surface ridging builds eastward towards the Mid-Atlantic states and continues to wedge down the southeastern seaboard. Increased forcing from troughing cutting off to the west of our region will likely result in waves of showers and a few embedded thunderstorms impacting northeast and north central FL, with activity becoming more scattered across inland southeast GA, especially for locations north and northwest of Waycross that will be located further away from the stalled frontal boundary. Increasing cloud cover and rain chances will keep inland highs in the upper 80s to around 90, while breezy onshore winds keep coastal highs in the mid to upper 80s. Coastal showers may increase in coverage and frequency on Thursday night along the I-95 corridor, while activity remains largely diurnal at inland locations, with dry conditions prevailing for locations north and west of Waycross, with only isolated to widely scattered showers expected elsewhere for inland locations to the west of I-95. Lows on Thursday night will range from around 70 for inland southeast GA to the mid and upper 70s at coastal locations. && .LONG TERM... (Friday through next Tuesday) Issued at 315 PM EDT Tue Aug 20 2024 A wet weather pattern will continue from Friday through the weekend for coastal southeast GA and most of northeast and north central FL as cutoff troughing to the west of our region begins to retrograde westward. High pressure extending from the Mid- Atlantic states through the southern Appalachians will continue to wedge down the southeastern seaboard on Friday, keeping breezy northeasterly winds in place along the I-95 corridor. Meanwhile, southwesterly flow aloft will continue to advect deeper moisture across coastal southeast GA, northeast and north central FL on Friday, resulting in widespread showers and thunderstorms for locations south and east of Waycross, while activity remains scattered in coverage for locations further away from the front towards the Altamaha/Ocmulgee Rivers. Highs on Friday will remain slightly below late August climatology, with mid to upper 80s forecast area-wide. Activity at inland locations will remain largely diurnal in nature, resulting in decreasing coverage on Friday evening, while breezy onshore winds prevailing at coastal locations keep scattered coastal showers moving onshore along the I-95 corridor on Friday night. Lows will again fall to the lower 70s inland, ranging to the mid and upper 70s at coastal locations. The slowly retrograding trough aloft along the northern Gulf coast will open the door for a weak tropical wave that will be traversing the Bahamas on Friday to push westward across the FL peninsula by Saturday. Deep tropical moisture will surge into northeast and north central FL, keeping widespread showers and a few embedded thunderstorms in the forecast for most of northeast and north central FL, while scattered coverage continues for locations north and northwest of Waycross in southeast GA. The wave axis will shift west of the FL peninsula on Sunday, allowing low level winds to veer to a more east-southeasterly direction. Widespread, mainly afternoon and evening showers and thunderstorms will continue for locations along and south of I-10 on Sunday, with coverage remaining scattered for locations north and west of Waycross. Highs will begin to nudge upwards towards the 90 degree mark as troughing aloft continues to retrograde westward, allowing for Atlantic ridging to build westward across the FL peninsula. Activity will continue to remain diurnal in nature, with widely scattered coastal showers remaining possible within the low level onshore wind regime along and east of I-95. Lows will again fall to the lower 70s inland, ranging to the mid and upper 70s for coastal locations. Ridging aloft will continue to gradually build over our region early next week, with a drier air mass potentially advecting into southeast GA, while deeper moisture prevails for locations along and south of I-10. Showers and thunderstorms will be driven by mesoscale boundary interactions (such as the Atlantic and Gulf coast sea breezes) and will remain mostly diurnal in nature. Rising heights aloft will allow highs to reach the lower 90s at most inland locations by early next week, while persistent onshore winds keep coastal highs in the upper 80s to around 90. Lows early next week will remain in the 70s region-wide. && .AVIATION... (00Z TAFS) Issued at 748 PM EDT Tue Aug 20 2024 VFR conditions primarily through most of the period for the 00Z TAF forecast. Few isolated showers are fading quickly as the Atlantic seabreeze moves west of VQQ before fading too as a weak front stretches across northeast Florida to along the Georgia coast. Some brief MVFR fog is possible at VQQ and GNV after 08 to 09Z through 12Z. Despite the front, few clouds expected late overnight except at SSI as northeasterly flow begins to develop and bring in few to scattered Atlantic stratocumulus clouds above 1.0 kft. Northeast winds will begin Wednesday 5-10 knots over the TAF sites and then increase along the coast to 10-15 knots with gusts to 20-25 knots. Onshore northeast flow will bring in scattered coastal showers prompting VCSH coverage for all sites after 18Z. With the front over the northeast florida terminals and daytime heating, have added PROB30 groups for thunderstorm potential in the last 6 hours of the period. && .MARINE... Issued at 315 PM EDT Tue Aug 20 2024 A cold front will continue to push south into the northeast Florida waters today and will stall in the vicinity through Wednesday. A strengthening ridge of high pressure to the north will push the stalled front farther south during the second half of the upcoming week, allowing a surge of northeasterly onshore winds. Thunderstorm chances continue each day through the end of the week. Rip Currents: Moderate risk for rip currents for all beaches today and Wednesday. && .FIRE WEATHER... Issued at 315 PM EDT Tue Aug 20 2024 Surface and transport winds will shift to northeasterly for locations along and north of the I-10 corridor, with breezy northeasterly surface winds developing by noon across coastal southeast GA, with these breezy surface winds then building southward along the I-95 corridor during the mid to late afternoon. Meanwhile, light southwesterly transport winds will prevail through the mid-afternoon hours across north central FL before shifting to easterly towards sunset. Fair daytime dispersion values are forecast at most locations, while good values will be possible for inland southeast GA on Wednesday. Breezy northeasterly surface and transport winds will prevail across southeast GA and northeast FL on Thursday and Friday, with lighter southerly transport winds expected for north central FL. These breezy winds will create good daytime dispersion values for inland southeast GA and the Suwannee Valley, with fair values forecast elsewhere, except poor values for north central FL on Thursday. && .HYDROLOGY... Issued at 315 PM EDT Tue Aug 20 2024 Moderate flooding along lower portions of the Santa Fe River near the Three Rivers Estates gauge will fall back to minor flooding by Wednesday night. Otherwise, minor flooding will continue through late Thursday evening at the downstream gauge near Hildreth before water levels fall below flood stage. Minor flooding continues along upper portions of the Suwannee River near the gauges at Suwannee Springs and White Springs, where water levels will fall below flood stage later this week or early in the upcoming weekend. Minor flooding will also continue along lower portions of the Suwannee River for gauges south of Branford and the confluence with the lower Santa Fe River, and water levels will then begin to fall below flood stage during the weekend. Minor flooding continues along lower portions of the Satilla River near the gauge at Atkinson, where water levels are forecast to fall below flood stage on Thursday morning. && .PRELIMINARY POINT TEMPS/POPS... AMG 71 90 70 87 / 10 40 10 50 SSI 77 87 77 85 / 10 50 30 70 JAX 75 92 73 88 / 10 60 30 80 SGJ 76 89 77 88 / 20 40 40 90 GNV 72 94 73 89 / 10 40 30 90 OCF 73 93 73 88 / 10 30 30 90 && .JAX WATCHES/WARNINGS/ADVISORIES... FL...None. GA...None. AM...None. &&
The national radar mosaic for the moment the first event began.
1 heavy rain. Local standard time, as filed.
A public rain gauge south of Blackshear near the Satilla River measured a storm total | rainfall amount of 3.27 inches, mainly | during the late afternoon hours.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Georgia in 2024Every state in 2024This day in weather historyWarnings in Georgia, August 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: 1199557.