High pressure strengthened over the area through the day however a moist and and unstable airmass continued to fuel sea breeze induced thunderstorms. A lone severe storm developed in Nassau county in the evening and produced wind damage.
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.
High pressure strengthened over the area through the day however a moist and and unstable airmass continued to fuel sea breeze induced thunderstorms. A lone severe storm developed in Nassau county in the evening and produced wind damage.
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 6, 1:07 PM EST, 4 hours 40 minutes earlier.
Area Forecast Discussion National Weather Service Jacksonville FL 207 PM EDT Sun Aug 6 2017 .NEAR TERM /Tonight-Monday/... Tonight...With Ridge axis drifting northward and drier air slipping up the FL peninsula expect only isolated activity south of a line from GNV to SGJ while deeper moisture with PWATS near 2 inches will still support scattered showers and storms from I-10 northward across SE GA through the evening hours with a few strong storms with gusty winds, frequent lightning and heavy rainfall as the storms move off to the NE at 10-15 mph. Activity will fade across SE GA around midnight with partly cloudy skies and muggy conditions overnight as temps fall into the lower to middle 70s inland and upper 70s/near 80 along the river/coast. Monday...As ridge axis lift northward into SE GA some drier airmass will filter in aloft with PWATS dropping to 1.7 to 1.9 area-wide, but this will also allow for better daytime heating and still enough atmospheric moisture to kick off isolated to scattered showers/storms by the afternoon hours with storm coverage generally in the 20-40% range with best coverage in deepest moisture across SE GA although a secondary max is expected across inland NE FL as Gulf/Atlc coast sea breeze fronts meet later in the day. Although still slightly below climo coverage for early August. A few storms may become strong with gusty winds, lightning and locally heavy rainfall as mid level temps at 500mb remain near climo around -6C. A bit better isolation should allow for Max Temps to reach into the lower to middle 90s inland and near 90 at the coast and expect afternoon heat indices approaching 105 degrees once again. .SHORT TERM /Monday night - Tuesday night/... Monday night...The surface ridge will bisect the region near the FL/GA line during the evening hours. The SE flow will prevail around the southside of the Atlantic Ridge over Florida where isold to scattered showers and thunderstorms will persist west of highway 301 into the I-75 corridor through early to mid evening. On the northside of the Atlantic ridge, steering winds over southeast Georgia winds will be out of the southwest pushing isold to scattered convection back eastward over the interior back toward coastal SE Georgia during the bulk of the evening. Isolated to scattered convection in the evening will dissipate overnight into early Tue morning with lows in the mid 70s. Tuesday and Tuesday night...Low level ridge will remain near or nudge slightly north of the FL/GA border. This will allow for strong Atlantic sea breeze in the afternoon pushing convection further inland in the afternoon and evening. Soundings from NAM and GFS show a more favorable thermodynamic profile for convection Tuesday, specifically for inland SE GA. Will continue with higher POPs in the that area as well as Suwanee Valley area around 50-70 percent, then lower elsewhere. Strong gusty winds and locally heavy rain will be the primary concerns with storms in the afternoon given elevated PWATS (2 to 2.25"), estimated SBCAPE of 2500-3000 J/kg and DCAPE between 850-1000 J/kg. Max temps fcst in lower 90s most areas...a little lower along the coastal areas as the sea breeze pushes inland. Convection should slowly fade overnight with lows in the lower to mid 70s Tuesday night. .LONG TERM /Wednesday-Saturday/... .Wednesday...With the axis of the surface ridge north of the Altamaha River Basin with wind flow being primarily from the SE for most of the day. This will allow for ready inland transition of the Atlantic afternoon sea breeze. The Atlantic seabreeze will meet up with the Gulf seabreeze late afternoon near I-75 corridor. Diurnally driven scattered to numerous showers and storms are anticipated, with the better chances for interior locations skewing toward the western portions west of highway 301 later in the day. .Thursday through Saturday...with a bit less convection on Thu as drier air filters in from the southeast north of an upper level ridge moving across srn FL. Sfc ridge begins to strengthen a bit over the area Fri and Sat resulting in stronger southeasterly flow. Adequate moisture remains with PWATs more than 1.7 inches over the area and thus continued to forecast mainly scattered diurnal showers and storms driven by sea breezes with best rain chances over the inland areas. Temps will remain at or slightly above normal. && .AVIATION... Still expect some scattered showers/storms to pop-up near JAX metro TAF sites northward to SSI by 20z and will keep VCTS through about 00z, otherwise expect VFR conds through tonight with some lingering high clouds. && .MARINE... With Ridge axis to slide through the waters tonight and north of the waters through much of this week. A general SE flow is expected at 10-15 knots with seas 2-4 feet and local sea breezes at the coast. Rip Currents: Moderate Risk with some longer period swells at times in the SE Flow. && .PRELIMINARY POINT TEMPS/POPS... AMG 73 93 74 91 / 40 30 30 60 SSI 78 88 78 87 / 20 20 30 40 JAX 74 92 75 90 / 20 20 20 40 SGJ 77 89 78 88 / 10 20 10 30 GNV 73 92 74 91 / 10 30 30 40 OCF 75 92 75 91 / 10 30 30 30 && .JAX WATCHES/WARNINGS/ADVISORIES... FL...None. GA...None. AM...None. && Hess/Cordero/McGinnis
Hazardous Weather Outlook National Weather Service Jacksonville FL 328 AM EDT Sun Aug 6 2017 AMZ450-452-454-470-472-474-FLZ020>025-030>033-035>038-040-124-125- GAZ132>136-149>154-162>166-070830- Coastal waters from Altamaha Sound to Fernandina Beach FL out 20 NM- Coastal waters from Fernandina Beach to St. Augustine FL out 20 NM- Coastal waters from St. Augustine to Flagler Beach FL out 20 NM- Waters from Altamaha Sound GA to Fernandina Beach FL from 20 to 60 NM- Waters from Fernandina Beach to St. Augustine FL from 20 to 60 NM- Waters from St. Augustine to Flagler Beach FL from 20 to 60 NM- Hamilton-Suwannee-Columbia-Baker-Inland Nassau-Inland Duval-Union- Bradford-Clay-St. Johns-Gilchrist-Alachua-Putnam-Flagler-Marion- Coastal Nassau-Coastal Duval-Coffee-Jeff Davis-Bacon-Appling- Wayne-Atkinson-Ware-Pierce-Brantley-Inland Glynn-Coastal Glynn- Echols-Clinch-Charlton-Inland Camden-Coastal Camden- 328 AM EDT Sun Aug 6 2017 ...MODERATE RISK OF RIP CURRENTS AT NORTHEAST FLORIDA BEACHES... This Hazardous Weather Outlook is for Northeast Florida, Southeast Georgia and the Adjacent Coastal Waters. .DAY ONE...This Afternoon and Tonight... Scattered thunderstorms are expected to develop during the mid to late afternoon mainly from near the I-10 corridor north into southeast Georgia. A few storms may become strong and produce strong and gusty winds in addition to frequent lightning and locally heavy rain. There is a Moderate Risk of rip currents at the northeast Florida beaches due to a lingering long period swell. A River Flood warning is in effect for the St. Marys River at Macclenny where minor flooding will occur. .DAYS TWO THROUGH SEVEN...Monday through Saturday... Scattered mainly afternoon and evening thunderstorms are expected each day. A few strong storms will be possible. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected to be needed at this time. For additional information, visit the National Weather Service in Jacksonville website on the internet at weather.gov/jax.
Special Weather Statement
National Weather Service Jacksonville FL
448 PM EDT SUN AUG 6 2017
FLZ035-036-062115-
Alachua FL-Gilchrist FL-
448 PM EDT SUN AUG 6 2017
...SIGNIFICANT WEATHER ADVISORY FOR SOUTHEASTERN GILCHRIST AND
SOUTHWESTERN ALACHUA COUNTIES UNTIL 515 PM EDT...
At 448 PM EDT, Doppler radar was tracking a strong thunderstorm 7
miles northwest of Archer, or 12 miles north of Bronson, moving north
at 20 mph.
Wind gusts of 45 to 55 mph can be expected along with possible minor
wind damage.
Locations impacted include...
Alachua, Archer and Newberry.
LAT...LON 2978 8271 2977 8241 2948 8250 2948 8256
2954 8256 2954 8265 2953 8265 2956 8266
2956 8272
TIME...MOT...LOC 2048Z 181DEG 15KT 2962 8259
ELSENHEIMERSpecial Weather Statement
National Weather Service Jacksonville FL
452 PM EDT SUN AUG 6 2017
GAZ136-153-062130-
Inland Glynn GA-Wayne GA-
452 PM EDT SUN AUG 6 2017
...SIGNIFICANT WEATHER ADVISORY FOR NORTHWESTERN GLYNN AND
SOUTHEASTERN WAYNE COUNTIES UNTIL 530 PM EDT...
At 452 PM EDT, Doppler radar was tracking a strong thunderstorm over
Thalmann, or 11 miles northwest of Dock Junction. This storm was
nearly stationary.
Wind gusts of 45 to 55 mph can be expected along with possible minor
wind damage.
Locations impacted include...
Everett, Thalmann and Mount Pleasant.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
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 3119 8157 3119 8177 3128 8175 3130 8173
3133 8173 3136 8178 3142 8177 3151 8165
3149 8164 3147 8161 3145 8163 3144 8161
3143 8161 3139 8157 3134 8149
TIME...MOT...LOC 2052Z 191DEG 3KT 3130 8168
ELSENHEIMERSpecial Weather Statement National Weather Service Jacksonville FL 552 PM EDT SUN AUG 6 2017 FLZ024-025-062215- Inland Duval FL-Inland Nassau FL- 552 PM EDT SUN AUG 6 2017 ...SIGNIFICANT WEATHER ADVISORY FOR SOUTHWESTERN NASSAU AND WEST CENTRAL DUVAL COUNTIES UNTIL 615 PM EDT... At 552 PM EDT, Doppler radar was tracking a strong thunderstorm over Cisco Gardens, or 9 miles west of Jacksonville, moving north at 15 mph. Wind gusts of 45 to 55 mph can be expected along with possible minor wind damage. Locations impacted include... Cisco Gardens, Ortega, Normandy, Bryceville, Baldwin and Whitehouse Air Field. PRECAUTIONARY/PREPAREDNESS ACTIONS... 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 3026 8170 3025 8200 3044 8199 3044 8167 TIME...MOT...LOC 2152Z 181DEG 13KT 3035 8181 ELSENHEIMER
Special Weather Statement
National Weather Service Jacksonville FL
556 PM EDT SUN AUG 6 2017
FLZ022-030-031-062230-
Columbia FL-Union FL-Bradford FL-
556 PM EDT SUN AUG 6 2017
...SIGNIFICANT WEATHER ADVISORY FOR WESTERN BRADFORD...UNION AND
SOUTHEASTERN COLUMBIA COUNTIES UNTIL 630 PM EDT...
At 556 PM EDT, Doppler radar was tracking a strong thunderstorm over
Worthington Springs, or over Worthington Spring, moving north at 15
mph.
Wind gusts of 45 to 55 mph can be expected along with possible minor
wind damage.
Locations impacted include...
Lake Butler, Worthington Spring, Worthington Springs, Palestine
Community, Upland Pines, Groves, Providence, Watertown, Lulu and
Dukes.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
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 3020 8246 3014 8246 3014 8231 2988 8236
2989 8239 2992 8241 2993 8245 2993 8247
2994 8248 2994 8252 2992 8254 2993 8255
2992 8258 3020 8261
TIME...MOT...LOC 2156Z 181DEG 13KT 2994 8247
ELSENHEIMERSpecial Weather Statement
National Weather Service Jacksonville FL
615 PM EDT SUN AUG 6 2017
FLZ024-025-062245-
Inland Duval FL-Inland Nassau FL-
615 PM EDT SUN AUG 6 2017
...SIGNIFICANT WEATHER ADVISORY FOR SOUTHWESTERN NASSAU AND CENTRAL
DUVAL COUNTIES UNTIL 645 PM EDT...
At 615 PM EDT, Doppler radar was tracking a strong thunderstorm near
Bryceville, or 9 miles south of Callahan, moving north at 10 mph.
Wind gusts of 45 to 55 mph can be expected along with possible minor
wind damage.
Locations impacted include...
Callahan, Jacksonville International Arpt, Cisco Gardens, Nassau
Village-Ratliff, Ratliff, Bryceville and Whitehouse Air Field.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
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 3043 8168 3032 8172 3033 8199 3042 8203
3045 8203 3046 8202 3046 8203 3047 8202
3056 8201 3059 8201 3056 8167
TIME...MOT...LOC 2215Z 171DEG 10KT 3042 8187
ELSENHEIMERSpecial Weather Statement
National Weather Service Jacksonville FL
645 PM EDT SUN AUG 6 2017
FLZ022-023-030-062330-
Columbia FL-Baker FL-Union FL-
645 PM EDT SUN AUG 6 2017
...SIGNIFICANT WEATHER ADVISORY FOR SOUTHWESTERN BAKER...NORTH
CENTRAL UNION AND CENTRAL COLUMBIA COUNTIES UNTIL 730 PM EDT...
At 645 PM EDT, Doppler radar was tracking strong thunderstorms along
a line extending from near Sanderson to Watertown. Movement was
northwest at 15 mph.
Wind gusts of 45 to 55 mph can be expected along with possible minor
wind damage.
Locations impacted include...
Lake City, Five Points, Watertown, Winfield, Suwannee Valley, Olustee
and Sanderson.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Frequent cloud to ground lightning is occurring with these storms.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.
&&
LAT...LON 3034 8268 3040 8265 3044 8266 3042 8222
3014 8217 3014 8245 3013 8246 3011 8246
3011 8265 3026 8280 3027 8279
TIME...MOT...LOC 2245Z 148DEG 15KT 3018 8229 3018 8261
ELSENHEIMERThe Jacksonville radar (KJAX), 26 km away, was scanning. The volume nearest the first event began at 22:49 UTC.
1 thunderstorm wind. Local standard time, as filed.
Power lines were blown down at Pratt Siding Road and U.S. Highway 1.
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: 708310.