Scattered thunderstorms developed along the afternoon sea breeze. A few of these thunderstorms became strong enough to produce damaging wind gusts.
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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.
Scattered thunderstorms developed along the afternoon sea breeze. A few of these thunderstorms became strong enough to produce damaging wind gusts.
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 Jul 6, 12:09 PM EST, 1 hour 29 minutes earlier.
Area Forecast Discussion National Weather Service Charleston SC 109 PM EDT Fri Jul 6 2018 .SYNOPSIS... A weak pressure pattern will reside over the area today. A cold front will shift into the area on Saturday, gradually dropping south of the area Sunday. High pressure will then build over the region for much of next week while low pressure passes offshore. && .NEAR TERM /THROUGH TONIGHT/... Today: No major changes were made to the previous forecast. Some showers and thunderstorms near the coast will continue to shift inland with the best coverage likely across southeast GA closer to the better instability and upper low. Overall a weak pressure pattern will prevail with a cold front remaining well to the northwest and weak low pressure well to the east. At the mid- levels there is a weak low just off the GA coast which will shift inland. Weak wind fields mean the convective mode will be of the pulse variety. Thermodynamics appear to be somewhat better than Thursday so a severe storm or two cannot be completely ruled out, mainly where mesoscale boundary interactions occur. Tonight: A cold front is forecast to sag south into the CSRA and SC Midlands adjacent to the northern zones late. Models suggest pooling PWATs and better chances for convection along the front will remain rather mostly north of the forecast area through the overnight. Some of the guidance indicates stratus and patchy fog could develop in some areas but we opted to not mention as yet since post-frontal would seem to be the more ideal setup. && .SHORT TERM /SATURDAY THROUGH MONDAY/... Saturday and Sunday: A weak mid/upper trough of low pressure will drift southwest of the area early Saturday well ahead of a backdoor cold front approaching from the north during the day. Ahead of this front, a light onshore wind will help drive plenty of moisture over the Southeast United States with PWATs around 2.0 inches while sfc temps warming into the upper 80s to around 90 degrees contribute to SBCAPE values ranging between 1500-2000 J/kg late morning and early afternoon. Scattered to numerous showers and thunderstorms are possible, some of which could be heavy rainfall producers near the vicinity of the front given deep layered moisture and weak wind fields. Activity could very well linger into Saturday night as the front slow advances south through the area. Temps will remain mild, ranging in the low/mid 70s. By Sunday, the bulk of precip activity should shift into Southeast Georgia, mainly along/near the front slowly advancing south. Another day of scattered to numerous showers and thunderstorms are possible as temps warm into the upper 80s. PWATs near 2.0 inches, SBCAPE ranging between 1500-2000 J/kg and weak wind fields could produce heavy rainfall, especially where forcing lingers in southern zones. Scattered showers/thunderstorms could persist into Sunday night, but a noticeable downward trend in activity is anticipated as high pressure begins to build over the region from the north. Monday: A large mid/upper ridge of high pressure will prevail over much of the United States while a sfc low passes well offshore and to the north. Most model guidance suggests this area of low pressure making a slight shift south along the Gulf Stream, putting it in a favorable location for conditions to be fairly warm and dry over Southeast South Carolina and Southeast Georgia. For this reason, precip chances have been primarily capped in the 15-20 percent range over Southeast South Carolina where sfc dewpts should dip into the mid 60s and around 30 percent in Southeast Georgia. Highs should peak around 90 degrees off the coast. && .LONG TERM /MONDAY NIGHT THROUGH THURSDAY/... Weather conditions will start off fairly dry as expansive mid/upper lvl high pressure prevails over much of the United States while sfc low pressure persists well offshore. A weak low pressure trough should then help eject the area of low pressure further offshore to the north mid week to late week. Given the setup, precip chances will generally be limited Tuesday and Wednesday as the area remains west of the low well offshore. Precip chances should increase with scattered showers and thunderstorms returning over much of the area mid to late week, especially during peak diurnal heating. A warming trend is also expected with high temps averaging in the lower 90s on Tuesday, then mid 90s Wednesday through late week. Overnight lows could briefly dip into the upper 60s well inland Monday night, then range in the low/mid 70s for the remainder of the week. && .AVIATION /18Z FRIDAY THROUGH WEDNESDAY/... Mainly VFR through the 18Z TAF period at KCHS/KSAV. Low risk for restrictions from showers/tstms mainly through mid-afternoon as the sea breeze boundary pushes inland. A weak cold front will shift into the area tonight and with light wind fields in place there could be a low risk of stratus and/or fog late tonight with additional MVFR ceilings possible through Saturday morning. Extended Aviation Outlook: Periods of MVFR ceilings are likely at both CHS and SAV terminals Saturday and Sunday as showers and thunderstorms develop along/ahead of a passing cold front. Flight restrictions are more favorable for KSAV on Sunday as the front shifts further south. VFR conditions should then prevail at both terminals Monday into mid week. && .MARINE... Light winds are expected through tonight ahead a cold front that will approach the northern waters late. Variable directions turn more south to southeast late day with veering to offshore ahead of the front by late tonight. Speeds 10 kt or less and seas around 2 ft on average. Saturday through Wednesday: A backdoor cold front will approach from the north on Saturday, likely pushing over Georgia waters by Sunday, then just south of the area early next week. In general, northeast winds should peak around 15 kt Saturday and Sunday with seas no higher than 2-3 ft. Models insist that an area of low pressure will persist over the Gulf Stream well offshore and to the north early into the middle of next week. However, conditions are expected to remain below Small Craft Advisory levels as the low ejects to the north with the arrival of a weak trough over land. && .CHS WATCHES/WARNINGS/ADVISORIES... GA...None. SC...None. MARINE...None. && NEAR TERM...RJB SHORT TERM...DPB LONG TERM...DPB AVIATION...RJB MARINE...RJB
Hazardous Weather Outlook National Weather Service Charleston SC 501 AM EDT Fri Jul 6 2018 AMZ330-350-352-354-374-GAZ087-088-099>101-114>119-137>141-SCZ040- 042>045-047>052-070915- 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 extending 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- 501 AM EDT Fri Jul 6 2018 This Hazardous Weather Outlook is for Atlantic coastal waters, southeast Georgia and southeast South Carolina. .DAY ONE...Today and Tonight. The probability for widespread hazardous weather is low. .DAYS TWO THROUGH SEVEN...Saturday through Thursday. The probability for widespread hazardous weather is low. .SPOTTER INFORMATION STATEMENT... Spotter assistance is not anticipated at this time.
The Charleston,SC radar (KCLX), 67 km away, was scanning. The volume nearest the first event began at 18:38 UTC.
1 thunderstorm wind. Local standard time, as filed.
Chatham County Emergency Management reported a tree fell at the intersection of East 36th Street and Atlantic Avenue. The tree damaged a car and also brought down power lines.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Georgia in 2018Every state in 2018This day in weather historyWarnings in Georgia, July 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: 776738.