Prevailing SW steering flow focused a stronger west coast sea breeze inland through the afternoon. This boundary over a moist, unstable airmass with steep mid level lapse rates and 500 mb temps of -7 to -8 degC fueled a few strong storms that formed along boundary mergers then moved offshore of the local Atlantic coast into the evening.
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.
Prevailing SW steering flow focused a stronger west coast sea breeze inland through the afternoon. This boundary over a moist, unstable airmass with steep mid level lapse rates and 500 mb temps of -7 to -8 degC fueled a few strong storms that formed along boundary mergers then moved offshore of the local Atlantic coast into the evening.
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 9, 2:00 PM EST, 3 hours 25 minutes earlier.
Area Forecast Discussion National Weather Service Jacksonville FL 300 PM EDT Sun Aug 9 2020 ...INCREASING RAINFALL CHANCES EARLY THIS WEEK... .NEAR TERM [Through Tonight]... Hot and Humid conds early this afternoon with peak Heat Indices in the 104-108 range. St Simons Island was 91/79 with 108F Heat Index. These conditions will give way to scattered showers/storms mainly across SE GA and coastal NE FL from the US 301 corridor to I-95. Still expect a few strong to isolated severe storms with peak wet microburst winds of 40-60 mph possible, along with locally heavy rainfall, frequent lightning. Some small hail still possible with steep lapse rates aloft as 500mb temps close to -7C/-8C. Storm motion generally towards the East-Northeast 10-15 mph. Activity will linger over inland areas of SE GA due to outflows and sea breeze fronts pushing inland until around midnight. Typical muggy overnight lows in the lower/middle 70s inland and upper 70s/near 80 degrees along the coast/St Johns River. .SHORT TERM [Monday Through Tuesday Night]... Main story in the short term is slow increase back towards numerous to widespread showers during the afternoon hours on Monday and Tuesday as weak High Pressure ridge aloft will be replaced by amplifying trof over the SE US which will rotate into SE GA/NE FL and bring abundant and deep tropical moisture levels with Precipitable Water Amounts (PWATs) over 2 inches. This combined with light westerly steering flow, cool temps aloft at 500mb of -7C/-8C for mid August and inland moving sea breeze fronts will lead to 50-70% rainfall coverage on Monday afternoon and 60-80% rainfall coverage on Tuesday afternoon, along with enough atmospheric moisture for a shower/storm at anytime through the period. Max Temps in the lower/middle 90s by early afternoon will continue to support peak Heat Indices/Feels Like temps around 105 degrees for most locations. Strong to isolated severe storms will be possible each afternoon with gusty winds of 40-60 mph, but the slower storm motion of 10 mph or less will slowly increase to locally heavy rainfall threat as storm rainfall totals continue to add up through the week. .LONG TERM [Wednesday Through Sunday]... Wed/Thu...Numerous to widespread showers/storms will continue as decaying mid/upper level trof across SE GA/NE FL will continue to support daily rainfall chances of 60-90%, locally heavy rainfall and near normal temps through this period with highs in the lower 90s and lows in the 70s. Southwest steering flow will continue along with PWATs of 2 inches or more to support risk of heavy rainfall. Fri/Sat/Sun...A mid level ridge of high pressure will build in from the SE/Wrn Atlc and this will slowly bring in a somewhat drier airmass aloft with PWATs falling to slightly less than 2 inches and a shift of the steering flow to the South-Southeast. This subtle shift will lower daily rainfall chances into the 40-70% range with storm activity further inland from the Atlc coastal areas. Temps generally near to slightly above normal with highs in the lower/middle 90s and lows in the 70s and Heat Indices creeping back close to 105 degrees. Continued slow storm motion will continue the threat of locally heavy rainfall, but the threat will shift more inland each day. && .AVIATION... [Through 18Z Monday] Cumulus cloud streets have developed on schedule with bases between 3-4 KFT. Convection is starting to develop just east of Cecil Airport (KVQQ) and will continue to expand in areal coverage so will introduce a tempo group for KVQQ. Can see the Atlantic sea breeze on radar just coming across the Intracoastal Waterway and that should begin to squeeze the environment across the central peninsula later this afternoon. So everything looks to be on track right now with the previous aviation discussion update. && .MARINE... Mainly offshore Southwest flow at 10-15 knots with seas 2 to 3 feet and local sea breezes along the coast through the mid week time frame as High pressure ridge remains just south of the waters and low pressure trof remains north of the waters over the SE US. A slight shift northward in the high pressure ridge axis towards the end of the week over the waters will lead to shift in winds to south-southeast at 10-15 knots with seas remaining 2-3 ft. Rip Currents: Mainly low risk rip currents expected early this week as surf/breakers only in the 1-2 feet range and mainly offshore Southwest flow with afternoon sea breeze at 10-15 mph. && .PRELIMINARY POINT TEMPS/POPS... AMG 73 94 73 93 73 / 40 60 50 80 60 SSI 78 90 77 90 77 / 30 60 50 70 60 JAX 75 95 75 94 75 / 20 70 40 80 50 SGJ 76 93 75 93 75 / 10 50 50 70 50 GNV 74 95 74 94 74 / 20 40 30 70 40 OCF 74 95 73 94 74 / 30 40 30 70 30 && .JAX WATCHES/WARNINGS/ADVISORIES... FL...None. GA...None. AM...None. &&
Special Weather Statement
National Weather Service Jacksonville FL
530 PM EDT Sun Aug 9 2020
FLZ340-092200-
Western Marion FL-
530 PM EDT Sun Aug 9 2020
...SIGNIFICANT WEATHER ADVISORY FOR WEST CENTRAL MARION COUNTY UNTIL
600 PM EDT...
* At 530 PM EDT, National Weather Service meteorologists were
tracking a strong thunderstorm near Rainbow Lakes Estates. This
storm was nearly stationary.
* Penny size hail and winds in excess of 45 mph possible with this
storm.
* Locations impacted include...
Rainbow Lakes Estates and Romeo.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Torrential rainfall is occurring with this storm, and may lead to
localized flooding. Do not drive your vehicle through flooded
roadways.
Frequent cloud to ground lightning is occurring with this storm. If
you can hear thunder, you are close enough to be struck! Seek a safe
shelter inside a building or vehicle.
To report severe weather, contact your nearest law enforcement
agency. You can also share your report with NWS Jacksonville on
Facebook and Twitter.
&&
LAT...LON 2921 8254 2922 8240 2929 8241 2930 8237
2913 8238 2913 8253
TIME...MOT...LOC 2130Z 330DEG 2KT 2920 8252
ENYEDISpecial Weather Statement National Weather Service Jacksonville FL 532 PM EDT Sun Aug 9 2020 FLZ037-092200- Putnam FL- 532 PM EDT Sun Aug 9 2020 ...SIGNIFICANT WEATHER ADVISORY FOR EAST CENTRAL PUTNAM COUNTY UNTIL 600 PM EDT... * At 532 PM EDT, National Weather Service meteorologists were tracking a strong thunderstorm over Palatka. This storm was nearly stationary. * Winds in excess of 45 mph possible with this storm. * Locations impacted include... Palatka and East Palatka. PRECAUTIONARY/PREPAREDNESS ACTIONS... Torrential rainfall is occurring with this storm, and may lead to localized flooding. Do not drive your vehicle through flooded roadways. Frequent cloud to ground lightning is occurring with this storm. If you can hear thunder, you are close enough to be struck! Seek a safe shelter inside a building or vehicle. To report severe weather, contact your nearest law enforcement agency. You can also share your report with NWS Jacksonville on Facebook and Twitter. && LAT...LON 2965 8173 2970 8164 2964 8156 2960 8168 TIME...MOT...LOC 2132Z 014DEG 4KT 2965 8167 ENYEDI
Special Weather Statement
National Weather Service Jacksonville FL
534 PM EDT Sun Aug 9 2020
FLZ140-240-092215-
Central Marion FL-Eastern Marion FL-
534 PM EDT Sun Aug 9 2020
...SIGNIFICANT WEATHER ADVISORY FOR SOUTHEASTERN MARION COUNTY UNTIL
615 PM EDT...
* At 534 PM EDT, National Weather Service meteorologists were
tracking strong thunderstorms along a line extending from 7 miles
northwest of Pittman to near The Villages. Movement was southeast
at 5 mph.
* Small hail and winds in excess of 45 mph possible with these
storms.
* Locations impacted include...
Weirsdale, Ocklawaha, Moss Bluff, Lake Weir and Summerfield.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Torrential rainfall is 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. If
you can hear thunder, you are close enough to be struck! Seek a safe
shelter inside a building or vehicle.
To report severe weather, contact your nearest law enforcement
agency. You can also share your report with NWS Jacksonville on
Facebook and Twitter.
&&
LAT...LON 2902 8207 2917 8164 2905 8164 2905 8166
2896 8166 2896 8208
TIME...MOT...LOC 2134Z 325DEG 6KT 2907 8173 2897 8196
ENYEDISpecial Weather Statement
National Weather Service Jacksonville FL
542 PM EDT Sun Aug 9 2020
GAZ136-151-152-092245-
Pierce GA-Brantley GA-Wayne GA-
542 PM EDT Sun Aug 9 2020
...SIGNIFICANT WEATHER ADVISORY FOR SOUTHEASTERN PIERCE...BRANTLEY
AND SOUTHERN WAYNE COUNTIES UNTIL 645 PM EDT...
* At 540 PM EDT, National Weather Service meteorologists were
tracking a broken line of strong thunderstorms moving east from
near Jesup to near Fort Mudge. These storms will intersect the
east coast sea breeze across eastern Wayne, Brantley and extreme
eastern Pierce counties through 630 pm. Storm development is
expected to increase during this time frame.
* Small hail and wind gusts up to 50 mph possible with these storms.
* Locations impacted include...
Jesup, Nahunta, Gardi, Hickox, Raybon, Waynesville, Atkinson, Mount
Pleasant, Hortense and Broadhurst.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Torrential rainfall is 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. If
you can hear thunder, you are close enough to be struck! Seek a safe
shelter inside a building or vehicle.
To report severe weather, contact your nearest law enforcement
agency. You can also share your report with NWS Jacksonville on
Facebook and Twitter.
&&
LAT...LON 3161 8173 3159 8171 3156 8170 3154 8167
3151 8166 3147 8161 3140 8166 3139 8170
3136 8170 3133 8173 3130 8173 3128 8175
3117 8178 3116 8177 3114 8182 3110 8184
3110 8191 3107 8193 3115 8220 3163 8192
TIME...MOT...LOC 2140Z 288DEG 16KT 3157 8191 3118 8214
ENYEDISpecial Weather Statement
National Weather Service Jacksonville FL
554 PM EDT Sun Aug 9 2020
FLZ037-140-240-092245-
Central Marion FL-Putnam FL-Eastern Marion FL-
554 PM EDT Sun Aug 9 2020
...SIGNIFICANT WEATHER ADVISORY FOR EASTERN MARION AND CENTRAL PUTNAM
COUNTIES UNTIL 645 PM EDT...
* At 553 PM EDT, National Weather Service meteorologists were
tracking strong thunderstorms along a line extending from Palatka
to near Weirsdale. These storms were nearly stationary.
* Small hail and winds in excess of 45 mph possible with these
storms.
* Locations impacted include...
Palatka, Interlachen, Salt Springs, Juniper Springs, Lynne,
Weirsdale, Lake Delancy, Fruitland, Ocklawaha and Moss Bluff.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Torrential rainfall is 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. If
you can hear thunder, you are close enough to be struck! Seek a safe
shelter inside a building or vehicle.
To report severe weather, contact your nearest law enforcement
agency. You can also share your report with NWS Jacksonville on
Facebook and Twitter.
&&
LAT...LON 2966 8190 2969 8162 2933 8165 2932 8168
2931 8168 2930 8166 2896 8169 2896 8200
TIME...MOT...LOC 2153Z 256DEG 3KT 2964 8167 2898 8196
ENYEDISpecial Weather Statement
National Weather Service Jacksonville FL
608 PM EDT Sun Aug 9 2020
GAZ153-154-092245-
Inland Glynn GA-Coastal Glynn GA-
608 PM EDT Sun Aug 9 2020
...SIGNIFICANT WEATHER ADVISORY FOR NORTHWESTERN GLYNN COUNTY UNTIL
645 PM EDT...
* At 608 PM EDT, National Weather Service meteorologists were
tracking strong thunderstorms along a line extending from near
Carnigan to 6 miles south of Gardi. Movement was east at 20 mph.
* Small hail, funnel clouds, and wind gusts up to 50 mph possible
with these storms.
* Locations impacted include...
Dock Junction, Everett, Thalmann and Boys Estate.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Torrential rainfall is 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. If
you can hear thunder, you are close enough to be struck! Seek a safe
shelter inside a building or vehicle.
To report severe weather, contact your nearest law enforcement
agency. You can also share your report with NWS Jacksonville on
Facebook and Twitter.
&&
LAT...LON 3116 8154 3125 8176 3128 8175 3130 8173
3133 8173 3133 8172 3136 8170 3138 8171
3140 8169 3140 8167 3145 8163 3144 8161
3143 8161 3138 8155 3132 8145
TIME...MOT...LOC 2208Z 261DEG 16KT 3146 8147 3144 8178
ENYEDIThe Jacksonville radar (KJAX), 87 km away, was scanning. The volume nearest the first event began at 22:24 UTC.
1 thunderstorm wind. Local standard time, as filed.
A large pine tree was blown down across Georgia Highway 32 near Thalmann and Georgia Road 99. The cost of damage was estimated for inclusion of the event in Storm Data.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Georgia in 2020Every state in 2020This day in weather historyWarnings in Georgia, August 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: 905027.