Modest shear along with a warm and moderately unstable atmosphere occurring ahead of a cold front led to an environment favorable for severe thunderstorms across southeast Georgia.
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 CHS wrote it up.
Modest shear along with a warm and moderately unstable atmosphere occurring ahead of a cold front led to an environment favorable for severe thunderstorms across southeast Georgia.
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 Charleston, SC wrote its last area forecast discussion before the first event at Jun 12, 3:28 PM EST, 1 hour 11 minutes earlier.
Area Forecast Discussion National Weather Service Charleston SC 428 PM EDT Mon Jun 12 2023 .SYNOPSIS... A cold front will advance into the region into tonight. The front could linger across the region through much of the week before shifting offshore this weekend. && .NEAR TERM /THROUGH TONIGHT/... Afternoon composite analysis reveals anomalously deep closed mid level low over the Great Lakes with several vorticity maxima pinwheeling around the closed low, closest of which is rotating up through VA. Surface low pressure is over the eastern Great Lakes with a cold front that arcs down through the mid Atlantic and further into far western South Carolina/northern Georgia. Ahead of the boundary, an axis of decent MLCAPE has developed across Georgia and the Carolinas with values generally running 20000-2500 J/Kg and 0-6Km effect shear of 30 knots or better. Larger scale synoptic forcing for ascent is weaker compared to yesterday, evidenced by the less organized convection thus far. But spotty showers have popped inland in the last two hours or so. Surface cold front will press into the CWA tonight and eventually off the coast late overnight/early Tuesday. Ongoing showers and thunderstorms will continue to organize to some degree and move through the region and off the coast through mid to late evening or so. As mentioned above, we just don't have the same degree of larger scale forcing for ascent to work with as we had Sunday, and thus the overall coverage may end up much lower. Radar trends and ongoing CAM guidance runs also support that notion. Thus, we will forego categorical PoPs for now and continue to highlight scattered to numerous PoPs over the next several hours. Severe weather: Plenty of instability with MLCAPE values forecast around 2500 J/Kg, along with a fair amount of DCAPE in excess of 800 J/Kg...greatest across the GA counties. Effective shear could be better...but still pushing 35 knots to aid in updraft organization. Upshot, we remain within the SPC Marginal risk through tonight which is appropriate. Main severe threat will be damaging wind gusts, with hail a lesser but potential threat. Overnight: Diurnal convection will wane by late evening. A few CAM guidance runs have hinted at some additional convective development during the overnight as the actual boundary finally presses through the region. I cannot completely rule that out, just depending on much instability is still around at that hour. But I'm leaving the forecast dry for now. && .SHORT TERM /TUESDAY THROUGH THURSDAY/... Tuesday through Wednesday: The large scale pattern will feature the continuation of a large closed upper low over southeast Canada and the northeastern U.S. Our region will remain on the southern periphery of the upper flow. The region will also have a weak surface front stalled over or just north of the region as well. Both of these features will help to produce scattered to numerous mainly afternoon and evening showers and thunderstorms each day. CAPE values of 1000-2000 J/Kg, DCAPE up to 1000 J/Kg, and bulk shear of 25-35 knots will be sufficient to allow for the potential for isolated severe storms each day. The SPC generally has our region in slight to moderate risk severe storms both days. The main impacts will be the potential for strong/gusty winds and hail. Temperatures are expected to be around normal. Thursday: Models continue indicate the deep, closed upper low over southeast Canada will move northeast, with slightly more zonal upper flow over our region along with lower values of deep layer moisture. Thus, maybe slightly lower precip chances, as well as a lower potential for severe storms. However, still keeping chance PoPs in the afternoon. Temperatures near to slightly above normal, especially max temperatures if there is a little more sun than previous days. && .LONG TERM /THURSDAY NIGHT THROUGH MONDAY/... The deep upper low over the northeast U.S. is shown by models to weaken and gradually move northeastward through Saturday. Weak mid/upper level ridging may develop over the southeast later in the weekend , but it does not look to be strong enough to shut off precip. chances. The lowest PoP days expected to be Friday and Saturday with lower values of deep layer moisture. Have kept slight chance to low end chance PoPs for Friday and Saturday. By Sunday and Monday, deep moisture tries to return from the west and possibly the potential for more upper level shortwaves to move across the region. Thus, PoPs may rise back to climo or slightly above climo values. Can never rule out the potential this time of year for isolated stronger storms each afternoon, especially for Sunday and Monday. Temperatures generally slightly above normal through the period. && .AVIATION /19Z MONDAY THROUGH SATURDAY/... VFR weather continues. Cold front is stretched across far western North Carolina and northern Georgia and will be pressing into and through the region later this afternoon and tonight. Showers and thunderstorms will develop ahead of the boundary and likely to impact the terminals. Current timing suggests 22Z to 02Z as the primary impact time, reflected in the current terminal forecasts. Convection will slip out of the region by later in the evening. VFR conditions are anticipated thereafter, although there could be some lower cloud cover and patchy fog around overnight through early Tuesday morning. Will not include any flight restrictions at this juncture. Extended Aviation Outlook: Periodic afternoon/early evening flight restrictions continue to be likely at the terminals with scattered to numerous showers and thunderstorms. Isolated strong to severe storms possible with strong/gusty winds and possibly hail. Thursday through Saturday: Slightly lower coverage of afternoon/evening showers and thunderstorm expected, along with a lower probability for severe storms. However, still feel brief flight restrictions will be possible each afternoon due to scattered showers and thunderstorms. && .MARINE... Some gustier southwest winds are present across the coastal waters, particularly the Charleston nearshore area and the harbor. Small Craft Advisory remains in effect for AMZ350 through midnight and, given recent gusts in the harbor, I've added AMZ330 to the headline as well. Gustiness will diminish overnight. Highlights are not expected through the period. However, unsettled weather with the potential for late afternoon and evening scattered to numerous showers and thunderstorm through the period. The best chance for storms will likely be within 20 nm of the coast, especially through Wednesday. Isolated strong to even severe storms will be possible. The main impact being winds of 34 knots or greater, especially Tuesday and Wednesday. Slightly lower potential for severe storms Thursday through Saturday. Generally south- southwest winds of 10 to 20 knots and seas 2 to 4 feet, highest beyond 20 nm offshore through the period. && .CHS WATCHES/WARNINGS/ADVISORIES... GA...None. SC...None. MARINE...Small Craft Advisory until midnight EDT tonight for AMZ330-350. && NEAR TERM...Adam SHORT TERM...RFM LONG TERM...RFM AVIATION...Adam/RFM MARINE...Adam/RFM
Hazardous Weather Outlook National Weather Service Charleston SC 327 PM EDT Mon Jun 12 2023 AMZ330-350-352-354-374-GAZ087-088-099>101-114>119-137>141-SCZ040- 042>045-047>052-131930- Charleston Harbor- Waters from South Santee River to Edisto Beach SC out 20 NM- Waters from Edisto Beach SC to Savannah GA out 20 NM- Waters from Savannah GA to Altamaha Sound GA out 20 NM, including Grays Reef National Marine Sanctuary- Waters from Savannah GA to Altamaha Sound GA from 20 to 60 NM- Jenkins-Screven-Candler-Bulloch-Effingham-Tattnall-Evans- Inland Bryan-Coastal Bryan-Inland Chatham-Coastal Chatham-Long- Inland Liberty-Coastal Liberty-Inland McIntosh-Coastal McIntosh- Allendale-Hampton-Inland Colleton-Dorchester-Inland Berkeley- Inland Jasper-Beaufort-Coastal Colleton-Charleston-Coastal Jasper- Tidal Berkeley- 327 PM EDT Mon Jun 12 2023 This Hazardous Weather Outlook is for Atlantic coastal waters, southeast Georgia and southeast South Carolina. .DAY ONE...Tonight. Severe Thunderstorms: Thunderstorms will impact the region through mid evening. A few thunderstorms may produce damaging wind gusts, with localized damage to trees and power lines possible. Hail up to one inch in diameter is also possible with the strongest storms. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. Severe Thunderstorms: An unstable airmass will be present across southeast South Carolina and southeast Georgia into the middle of the week. Expect numerous thunderstorms Tuesday and Wednesday, some of which could become strong to severe each afternoon and evening. Damaging wind gusts and hail will be the primary concerns. .SPOTTER INFORMATION STATEMENT... Spotter assistance is not anticipated at this time.
Preliminary Local Storm Report
National Weather Service Charleston SC
1245 PM EDT Mon Jun 12 2023
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0200 PM Rip Currents 1 S Tybee Island 31.99N 80.85W
06/11/2023 Chatham GA Lifeguard
Several moderate rip currents observed at the south end
of Tybee Island.
&&
Event Number CHS2300350
ADAMPreliminary Local Storm Report...Summary
National Weather Service Charleston SC
425 PM EDT Mon Jun 12 2023
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0255 PM Tstm Wnd Dmg 5 E Islandton 32.90N 80.86W
06/11/2023 Colleton SC 911 Call Center
Colleton County Warning Point reported one tree down at
the intersection of Lowcountry Highway and Miracle Road
and another tree down at Lowcountry Highway and Broadway
Court.
0320 PM Tstm Wnd Dmg Millen 32.80N 81.96W
06/11/2023 Jenkins GA 911 Call Center
One downed tree reported on Parks Rd in Millen, GA.
Time estimated from radar.
0342 PM Tstm Wnd Dmg 3 NNW Sylvania 32.79N 81.65W
06/11/2023 Screven GA 911 Call Center
Screven County Warning Point reported multiple trees
down on Bascom Road near Country Club Road.
0411 PM Tstm Wnd Dmg Brunson 32.92N 81.19W
06/11/2023 Hampton SC 911 Call Center
One tree down reported in Brunson, SC. Time estimated
from radar.
0418 PM Tstm Wnd Dmg Garnett 32.61N 81.25W
06/11/2023 Hampton SC 911 Call Center
One tree reported down in Garnett. Time estimated from
radar.
0430 PM Tstm Wnd Dmg 4 W Ashton 33.01N 81.04W
06/11/2023 Colleton SC 911 Call Center
Colleton County Warning Point reported a tree down at
the 1600 block of Broxton Bridge Highway.
0434 PM Tstm Wnd Dmg 1 SW Shawnee 32.46N 81.42W
06/11/2023 Effingham GA 911 Call Center
Effingham County Warning Point reported a couple of
trees down at the 400 block of Shawnee Egypt Road.
0439 PM Tstm Wnd Dmg 3 NE Islandton 32.94N 80.90W
06/11/2023 Colleton SC 911 Call Center
Colleton County Warning Point reported a tree down on
powerlines on the 2700 block of Rum Gully Road.
0439 PM Tstm Wnd Dmg 3 SW Clyo 32.46N 81.31W
06/11/2023 Effingham GA 911 Call Center
Effingham County Warning Point reported a tree down at
1500 block of Green Morgan School Road.
0440 PM Lightning 2 NE Miley 32.97N 81.01W
06/11/2023 Colleton SC 911 Call Center
Colleton County Warning Point reported a tree struck by
lightning came down and took three other trees down on
Moselle Road near Barnes Road.
0450 PM Tstm Wnd Dmg 6 S Ruffin 32.92N 80.82W
06/11/2023 Colleton SC Emergency Mngr
Tree down at the 4800 and 3300 block of Hudson Mill
Road.
0453 PM Tstm Wnd Dmg 1 SW Ruffin 32.99N 80.82W
06/11/2023 Colleton SC Emergency Mngr
Tree down at the 1500 block of Hydrick Road.
0505 PM Tstm Wnd Dmg 2 N Walterboro 32.93N 80.66W
06/11/2023 Colleton SC Emergency Mngr
Tree down at 1800 block of Jefferies Highway.
0508 PM Tstm Wnd Dmg 2 E Walterboro 32.90N 80.64W
06/11/2023 Colleton SC Emergency Mngr
Tree down at 705 Poplar Street in Walterboro. Time
estimated from radar.
0511 PM Tstm Wnd Dmg 2 ESE Walterboro 32.90N 80.64W
06/11/2023 Colleton SC Emergency Mngr
Tree down at the 1700 block of Hampton Street.
0514 PM Tstm Wnd Dmg 3 NE Yemassee 32.71N 80.81W
06/11/2023 Colleton SC Emergency Mngr
Tree down on 16721 Hendersonville Highway. Time
estimated from radar.
0520 PM Tstm Wnd Dmg 4 SSE Walterboro 32.85N 80.64W
06/11/2023 Colleton SC Emergency Mngr
Tree down at the 800 block of Cooks Hill Road.
0602 PM Tstm Wnd Dmg Richmond Hill 31.94N 81.30W
06/11/2023 Bryan GA 911 Call Center
One tree down in Richmond Hill. Time estimated from
radar.
0609 PM Tstm Wnd Gst 6 WSW Richmond Hill 31.92N 81.41W
06/11/2023 E60 mph Liberty GA Public
Thunderstorm wind damage with tree tops broken off and
tree limbs down. Wind speed estimated. Time estimated
from radar.
0647 PM Funnel Cloud 3 S Vernonburg 31.93N 81.11W
06/11/2023 Chatham GA Broadcast Media
A member of the Savannah Broadcast media relayed a
video of a well-defined funnel cloud looking south off
of the Shipyard Road Causeway near the Vernon River.
There were no reports of damage and the video suggested
the funnel did not touch down.
0648 PM Tstm Wnd Gst 2 ESE Charleston 32.77N 79.91W
06/11/2023 M40 mph AMZ330 SC Mesonet
Shutes Folly Weatherflow sensor reported a 35 knot wind
gust.
0648 PM Tstm Wnd Gst 2 WSW Folly Beach 32.64N 79.97W
06/11/2023 M43 mph Charleston SC Mesonet
Folly South End Weatherflow sensor reported a 37 knot
wind gust.
0652 PM Tstm Wnd Gst 3 NE Folly Beach 32.69N 79.89W
06/11/2023 M39 mph Charleston SC C-Man Station
The C-MAN station at the north end of Folly Beach
reported a peak wind gust of 34 knots as thunderstorms
moved through.
0653 PM Tstm Wnd Gst 4 ESE Charleston 32.75N 79.87W
06/11/2023 M41 mph AMZ330 SC Mesonet
Fort Sumter Weatherflow sensor reported a 36 knot wind
gust.
0653 PM Tstm Wnd Gst 2 WSW Folly Beach 32.64N 79.97W
06/11/2023 M40 mph Charleston SC Mesonet
Folly South End Weatherflow sensor reported a 35 knot
wind gust.
&&
EVENT NUMBER CHS2300332 CHS2300326 CHS2300333 CHS2300328 CHS2300327
CHS2300329 CHS2300334 CHS2300330 CHS2300335 CHS2300331 CHS2300336
CHS2300337 CHS2300338 CHS2300347 CHS2300339 CHS2300346 CHS2300340
CHS2300348 CHS2300349 CHS2300517 CHS2300341 CHS2300342 CHS2300345
CHS2300343 CHS2300344
ETMSpecial Weather Statement
National Weather Service Charleston SC
440 PM EDT Mon Jun 12 2023
GAZ114-122100-
Tattnall-
440 PM EDT Mon Jun 12 2023
...STRONG THUNDERSTORMS WILL IMPACT PORTIONS OF TATTNALL COUNTY...
At 440 PM EDT, National Weather Service doppler radar indicated a
strong thunderstorm over Collins, or near Reidsville, moving east at
30 mph.
HAZARD...strong winds 45 to 55 mph.
SOURCE...Radar Indicated.
IMPACT...Expect minor damage to tree limbs and blowing around of
light, unsecured objects.
Some locations in the path of this storm include...
Reidsville, Collins, Manassas, and Gordonia Altamaha State Park.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Report damage directly to the Charleston National Weather Service at
888-383-2024 when it is safe to do so. You can also email your
report to nws.charlestonsc@noaa.gov.
&&
LAT...LON 3229 8206 3228 8203 3209 8198 3205 8189
3209 8220 3218 8218 3221 8221 3225 8222
TIME...MOT...LOC 2040Z 267DEG 28KT 3218 8214
MAX HAIL SIZE...0.00 IN
MAX WIND GUST...55 MPHThe Charleston,SC radar (KCLX), 55 km away, was scanning. The volume nearest the first event began at 21:40 UTC.
1 thunderstorm wind. Local standard time, as filed.
The public reported a localized downburst that damaged 3 homes on Shearouse Landing. A chicken coop was destroyed, 3 homes had shingle damage and several items in the yard were damaged or destroyed, including a swing set and a trampoline.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Georgia in 2023Every state in 2023This day in weather historyWarnings in Georgia, June 2023
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: 1112706.