Several low level boundaries were across the local forecast area including a wake trough axis post-Isaias across south Georgia and an outflow boundary stalled near the I-95 corridor of NE FL. 4 degC), scattered strong to severe storms developed along and near the boundaries.
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.
Several low level boundaries were across the local forecast area including a wake trough axis post-Isaias across south Georgia and an outflow boundary stalled near the I-95 corridor of NE FL. With daytime heating, high moisture content (PWAT 2 inches) and steeper mid level lapse rates (MU 7.4 degC), scattered strong to severe storms developed along and near the boundaries. Hazards included downbursts and hail.
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 4, 2:39 PM EST, 42 minutes earlier.
Area Forecast Discussion National Weather Service Jacksonville FL 339 PM EDT Tue Aug 4 2020 .NEAR TERM [Tonight and Wednesday]...Trailing trough from T.S. Isaias extending into Ga will be a focus for scattered thunderstorms to continue across se Ga through the the evening hours. Another area for possible development will be near the ne Fl coast where the east coast seabreeze is slowly moving inland. Warm and dry air aloft will limit the severe potential with any isolated strong storms resulting from boundary and cell mergers. Similar pattern on Wednesday with a light sw flow favoring eastern zones for afternoon/evening convection. Hot and humid conditions will continue with low temperatures tonight mostly in the 75-80 degree range. Heat indices will again reach near 105F Wednesday afternoon. .SHORT TERM [Wednesday night through Friday Night]...Troughing will persist to the northwest with ridge to the southeast. A southwest steering flow will decrease on Friday as the ridge builds closer the area. Moisture will be at or above normal which will mean scattered to numerous diurnal seabreeze storms. Temperatures will be at or above average. .LONG TERM [Saturday Through Tuesday]...Subtropical ridge will remain just to the south through the period. Daily seabreezes with ample moisture remaining over the area will result in scattered to numerous thunderstorms each afternoon and evening. Highest coverage of storms will be over inland areas as the seabreezes move inland and merge over the interior. Steering winds will be light and variable resulting in slow moving storms and areas of locally heavy rainfall. The stronger storms will also produce strong gusty winds and frequent ligthning strikes. && .MARINE...Troughing will linger over the southeastern states through Thursday along with prevailing south southwesterly winds in place over our waters. The sea breeze will develop near the coast each afternoon resulting in onshore winds over the near shore waters. The Atlantic surface high pressure system will build westward across the Florida peninsula late this week and weekend with prevailing southerly winds. Scattered to numerous thunderstorms will push into the coastal waters during the late afternoon and evening hours through Thursday. && .PRELIMINARY POINT TEMPS/POPS... AMG 73 94 73 94 72 / 50 60 50 70 20 SSI 78 90 78 90 77 / 30 30 30 70 30 JAX 75 93 74 93 74 / 40 50 40 70 20 SGJ 75 90 74 90 74 / 30 30 30 70 20 GNV 74 93 73 91 73 / 10 30 30 70 20 OCF 74 91 73 91 73 / 0 40 30 70 20 && .JAX WATCHES/WARNINGS/ADVISORIES... FL...None. GA...None. AM...None. &&
Special Weather Statement National Weather Service Jacksonville FL 327 PM EDT Tue Aug 4 2020 GAZ136-151>153-042015- Pierce GA-Inland Glynn GA-Brantley GA-Wayne GA- 327 PM EDT Tue Aug 4 2020 ...SIGNIFICANT WEATHER ADVISORY FOR NORTHWESTERN GLYNN...EAST CENTRAL PIERCE...NORTHEASTERN BRANTLEY AND SOUTHEASTERN WAYNE COUNTIES UNTIL 415 PM EDT... * At 326 PM EDT, National Weather Service meteorologists were tracking a strong thunderstorm 7 miles north of Raybon, or 10 miles north of Nahunta, moving northeast at 10 mph. * Wind gusts up to 50 mph possible with this storm. * Locations impacted include... Nahunta, Everett, Raybon, Broadhurst and Hortense. PRECAUTIONARY/PREPAREDNESS ACTIONS... These winds can down small tree limbs and branches, and blow around unsecured small objects. Seek shelter in a safe building until the storm passes. 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 3121 8199 3135 8208 3156 8185 3138 8162 TIME...MOT...LOC 1926Z 233DEG 10KT 3136 8194 NGUYEN
Special Weather Statement
National Weather Service Jacksonville FL
406 PM EDT Tue Aug 4 2020
GAZ133-135-042045-
Appling GA-Jeff Davis GA-
406 PM EDT Tue Aug 4 2020
...SIGNIFICANT WEATHER ADVISORY FOR NORTHEASTERN JEFF DAVIS AND
NORTHERN APPLING COUNTIES UNTIL 445 PM EDT...
* At 406 PM EDT, National Weather Service meteorologists were
tracking a strong thunderstorm near Baxley, moving east at 15 mph.
* Wind gusts up to 50 mph possible with this storm.
* Locations impacted include...
Baxley, Graham, Plant Hatch and Pine Grove.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
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 3197 8243 3195 8241 3196 8238 3194 8238
3193 8231 3194 8228 3190 8219 3191 8213
3189 8212 3190 8211 3186 8212 3183 8206
3173 8246 3196 8255 3195 8249 3195 8248
3196 8250
TIME...MOT...LOC 2006Z 256DEG 12KT 3181 8235
NGUYENThe Moody AFB radar (KVAX), 116 km away, was scanning. The volume nearest the first event began at 20:20 UTC.
3 hail, 2 thunderstorm wind. Local standard time, as filed.
Large tree limbs and debris were blown down near the intersection of Pine Street and Anthony Street in Baxley.
Golf ball size hail was observed near North Main Street and Ivy Street in Baxley.
Quarter size hail was observed near the intersection of Pine Street and Anthony Street near Baxley.
Quarter to pea size hail was reported in Baxley near US Highway 1 and Highway 341.
Several trees and power lines were blown down across Baxley.
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: 904887, 904884, 904885, 904886, 904888.