Sea breeze storms developed with a drier airmass limiting convective coverage compared to recent days.
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.
Sea breeze storms developed with a drier airmass limiting convective coverage compared to recent days.
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 18, 3:08 PM EST, 3 hours 42 minutes earlier.
Area Forecast Discussion National Weather Service Jacksonville FL 408 PM EDT Sat Aug 18 2018 .SHORT TERM (Through Monday night)... Convection off to a later start today due to slightly drier air with PW below 2 inches. Best rain chances late this afternoon will be across inland Se Ga and Suwannee Valley where moisture is deepest. Isolated storms possible west of I-95 corridor this eve where seabreezes collide. Deep layer ridge will remain across central Fl with mid level dry air reducing Precipitable Water to below average with values near 1.5". A deep sw flow will result in late day seabreeze mergers near the east coast. Limited moisture will keep pops in the isolated to scattered category. Temperatures will continue to be slightly above average. .LONG TERM (Tuesday-Saturday)... Sw flow and moisture will increase again as a mid/upper trough digs over the eastern U.S. and a cold front begins to slowly move towards the area. The front is forecast to stall/wash out across Ne Fl by the end of the week. Highest pops will be across Se Ga on Wednesday and Ne FL on Thursday. Pops will increase area wide Friday-Saturday as the remnants of the front lift north and moisture surges north into the area. Temps will average near to slightly above normal except towards the end of the period where temps will cool to near to slightly below normal. && .AVIATION...Isolated storms expected late this afternoon and evening and have VCTS at all terminals except at SGJ til 23Z-02Z. Otherwise prevailing VFR. && .MARINE...No headlines. A ridge of high pressure will remain south of the waters. Winds south to southwest 10 to 15 knots except south to southeast near the coast in the afternoon. Seas 2 to 4 feet. Reduced rainfall chances this weekend over the adjacent waters, then elevated rain chances return Mon-Thu as a frontal zone slowly shifts southward over Ga. Rip Currents: A moderate risk for the Ne Fl beaches and low risk for the Se Ga beaches. && .PRELIMINARY POINT TEMPS/POPS... AMG 73 91 73 92 / 30 30 10 20 SSI 77 90 76 90 / 20 20 10 20 JAX 74 93 74 93 / 20 20 10 20 SGJ 76 91 74 89 / 20 20 20 30 GNV 72 93 74 92 / 20 20 10 30 OCF 73 93 73 93 / 10 30 10 30 && .JAX WATCHES/WARNINGS/ADVISORIES... FL...None. GA...None. AM...None. && PP/ARS/KB
Special Weather Statement National Weather Service Jacksonville FL 636 PM EDT SAT AUG 18 2018 FLZ036-037-182300- Putnam FL-Alachua FL- 636 PM EDT SAT AUG 18 2018 ...SIGNIFICANT WEATHER ADVISORY FOR EAST CENTRAL ALACHUA AND WEST CENTRAL PUTNAM COUNTIES UNTIL 700 PM EDT... At 636 PM EDT, Doppler radar was tracking a strong thunderstorm near Melrose, moving north at 15 mph. Excessive cloud-to-ground lightning can be expected. Postpone outdoor activities promptly. Go quickly inside a completely enclosed building. Unplug electronic devices and appliances as they are susceptible to power surges and may be damaged by nearby lightning strikes. Locations impacted include... Melrose, Hawthorne, Orange Heights, Melrose Landing and Johnson. PRECAUTIONARY/PREPAREDNESS ACTIONS... Torrential rainfall is also occurring with this storm, and may lead to localized flooding. Do not drive your vehicle through flooded roadways. && LAT...LON 2954 8195 2953 8214 2972 8215 2971 8192 TIME...MOT...LOC 2236Z 182DEG 14KT 2966 8204 SANDRIK
Special Weather Statement National Weather Service Jacksonville FL 639 PM EDT SAT AUG 18 2018 GAZ153-165-182315- Inland Glynn GA-Inland Camden GA- 639 PM EDT SAT AUG 18 2018 ...SIGNIFICANT WEATHER ADVISORY FOR CENTRAL CAMDEN AND SOUTHWESTERN GLYNN COUNTIES UNTIL 715 PM EDT... At 639 PM EDT, Doppler radar was tracking strong thunderstorms along a line extending from 6 miles northeast of Waverly to 6 miles northwest of Kingsland. Movement was east at 20 mph. Nickel size hail can be expected. Locations impacted include... Woodbine, Waverly and Colesburg. PRECAUTIONARY/PREPAREDNESS ACTIONS... Torrential rainfall is also occurring with these storms, and may lead to localized flooding. Do not drive your vehicle through flooded roadways. 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 3123 8158 3077 8171 3081 8184 3122 8170 TIME...MOT...LOC 2239Z 253DEG 18KT 3116 8165 3086 8174 SANDRIK
Special Weather Statement
National Weather Service Jacksonville FL
651 PM EDT SAT AUG 18 2018
FLZ024-025-032-GAZ165-182315-
Inland Duval FL-Inland Nassau FL-Clay FL-Inland Camden GA-
651 PM EDT SAT AUG 18 2018
...SIGNIFICANT WEATHER ADVISORY FOR WESTERN NASSAU...WESTERN CLAY AND
WESTERN DUVAL COUNTIES UNTIL 715 PM EDT...
At 650 PM EDT, Doppler radar was indicating developing strong
thunderstorms along a line extending from near Kings Ferry to 6
miles south of Bryceville to Melrose Landing. These storms were
nearly stationary.
Excessive cloud-to-ground lightning can be expected. Postpone outdoor
activities promptly. Go quickly inside a completely enclosed
building. Unplug electronic devices and appliances as they are
susceptible to power surges and may be damaged by nearby lightning
strikes.
Locations impacted include...
Keystone Heights, Callahan, Middleburg, Maxville, Kings Ferry, Lake
Geneva, Bryceville, Camp Blanding, Cecil Field and Nassau
Village-Ratliff.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Torrential rainfall is also occurring with these storms, and may lead
to localized flooding. Do not drive your vehicle through flooded
roadways.
&&
LAT...LON 3019 8186 2983 8187 2972 8204 3024 8203
3079 8184 3076 8171 3043 8183
TIME...MOT...LOC 2250Z 259DEG 4KT 3077 8179 3030 8196 2965 8198
SANDRIKSpecial Weather Statement
National Weather Service Jacksonville FL
703 PM EDT SAT AUG 18 2018
GAZ153-154-165-166-182330-
Inland Glynn GA-Inland Camden GA-Coastal Glynn GA-Coastal Camden GA-
703 PM EDT SAT AUG 18 2018
...SIGNIFICANT WEATHER ADVISORY FOR CENTRAL CAMDEN AND GLYNN COUNTIES
UNTIL 730 PM EDT...
At 703 PM EDT, Doppler radar was tracking strong thunderstorms along
a line extending from 6 miles southeast of Everett to near Kingsland.
Movement was east at 10 mph.
Excessive cloud-to-ground lightning can be expected. Postpone outdoor
activities promptly. Go quickly inside a completely enclosed
building. Unplug electronic devices and appliances as they are
susceptible to power surges and may be damaged by nearby lightning
strikes.
Locations impacted include...
Kingsland, Brunswick, St. Simons Island, Woodbine, Dock Junction,
Kings Bay Base, Country Club Estates, Sea Island, Jekyll Island and
Harrietts Bluff.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Torrential rainfall is also occurring with these storms, and may lead
to localized flooding. Do not drive your vehicle through flooded
roadways.
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 3119 8125 3110 8137 3079 8142 3070 8141
3080 8178 3140 8158 3133 8147 3134 8147
3133 8145 3133 8144 3131 8144 3128 8139
3129 8139 3128 8138 3130 8137 3131 8134
3128 8132 3128 8123
TIME...MOT...LOC 2303Z 268DEG 9KT 3134 8155 3078 8172
MCGINNISSpecial Weather Statement
National Weather Service Jacksonville FL
718 PM EDT SAT AUG 18 2018
FLZ024-025-032-124-125-182345-
Inland Duval FL-Inland Nassau FL-Coastal Duval FL-Coastal Nassau FL-
Clay FL-
718 PM EDT SAT AUG 18 2018
...SIGNIFICANT WEATHER ADVISORY FOR CENTRAL NASSAU...CLAY AND CENTRAL
DUVAL COUNTIES UNTIL 745 PM EDT...
At 718 PM EDT, Doppler radar was tracking strong thunderstorms along
a line extending from near Kingsland to near Lake Geneva. Movement
was east at 10 mph.
Excessive cloud-to-ground lightning can be expected. Postpone outdoor
activities promptly. Go quickly inside a completely enclosed
building. Unplug electronic devices and appliances as they are
susceptible to power surges and may be damaged by nearby lightning
strikes.
Locations impacted include...
Jacksonville, Orange Park, Green Cove Springs, Callahan, Jacksonville
International Arpt, Middleburg, Cisco Gardens, Ortega, Oakleaf
Plantation and Cecil Field.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Torrential rainfall is also occurring with these storms, and may lead
to localized flooding. Do not drive your vehicle through flooded
roadways.
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 3020 8170 3003 8169 2999 8165 2984 8170
2984 8181 2979 8191 2975 8194 2973 8202
2974 8204 3030 8195 3076 8178 3078 8177
3074 8167 3075 8166 3072 8161 3074 8160
3072 8157
TIME...MOT...LOC 2318Z 268DEG 8KT 3077 8169 2981 8195
SANDRIKPRELIMINARY LOCAL STORM REPORT
National Weather Service Jacksonville FL
745 PM EDT SAT AUG 18 2018
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0742 PM TSTM WND GST 1 NE JACKSONVILLE INTL 30.49N 81.69W
08/18/2018 M51 MPH Duval FL ASOS
SUSTAINED WIND OF 38 MPH WITH A GUST OF 51 MPH.
&&
NMCGINNThe Jacksonville radar (KJAX), 2 km away, was scanning. The volume nearest the first event began at 23:43 UTC.
1 thunderstorm wind. Local standard time, as filed.
A tree was blown down at the intersection of Terrell Road and Lem Turner Road. Multiple tree limbs were blown down across the road. Pea size hail was also reported.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Florida in 2018Every state in 2018This day in weather historyWarnings in Florida, August 2018
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: 781958.