High pressure dominated the state's weather with mostly clear skies and a southerly flow for the beginning of the week. Light rain was reported along the coast early on Tuesday. The Charleston Air Force Base reported fog, light rain and a brief period of heavy rain that totaled 0.14 inches in less than 20 minutes. Jocassee 8 WNW was the coolest on Monday and Tuesday with a low temperatures of 45 degrees and 48 degrees respectively. The Columbia Metro Airport was the warmest observing for the start of the week recording a high temperature of 95 on Monday and one degree higher on Tuesday. A pre-frontal trough triggered Upstate, Pee-Dee and Low country rain and thunderstorms around midnight on Tuesday. McClellanville 7NE reported 2.29 inches of overnight rain. Trees and limbs were knocked down by thunderstorms in Barnwell and Kershaw counties.
A cold front swept over the state on Wednesday. Lines of thunderstorms swept across the state from west to east. Late afternoon storms downed trees in Clarendon and Lee counties. The Florence Regional Airport received 0.89 inches of rain. Wednesday's high temperature was 90 degrees in Dillon and Barnwell.
High pressure built in over the state on Thursday behind the departing cold front. A strong ridge of high pressure remained parked over the Great Lakes through Sunday. Despite the threatening approach of Hurricane Irma, mostly clear conditions prevailed to the end of the week. Just a few isolated rainshowers were reported on Friday and on Saturday. Jocassee 8WNW reported 0.35 inches Friday and the Edisto Island Plantation reported 0.11 inches Saturday. The Anderson COOP site had the weekend's high temperature of 87 on Friday. Jocassee 8 WNW had a low temperature of 41 degrees on Saturday.
(Note: The highest and lowest official temperatures and highest precipitation totals provided below are based on observations from the National Weather Service Cooperative Observer network and the National Weather Service's Forecast Offices.)
The highest official temperature reported was 96 degrees at Columbia Metro Airport on September 5.
The lowest official temperature reported was 41 degrees at Jocassee 8 WNW on September 7.
The heaviest official 24-hour rainfall reported was 2.29 inches at McClellanville 7 NE ending at 7:00 a.m. September 6.
The state average rainfall for the seven-day period was 0.9 inches.
| Weekly | Jan 1 | Departure | |
|---|---|---|---|
| Anderson Airport | 2.01 | 40.32 | 9.5 |
| Greer Airport | 1.36 | 39.69 | 6.0 |
| Charlotte, NC Airport | 1.10 | 36.54 | 6.8 |
| Columbia Metro Airport | 0.32 | 37.07 | 3.9 |
| Orangeburg Airport | 0.20 | 28.46 | -6.2 |
| Augusta, GA Airport | 0.17 | 34.55 | 2.6 |
| Florence Airport | 1.46 | 33.06 | 1.3 |
| North Myrtle Beach Airport | 1.97 | 37.90 | 0.1 |
| Charleston Air Force Base | 0.57 | 39.59 | 1.6 |
| Savannah, GA Airport | 0.29 | 42.75 | 6.6 |
Weekly rainfall totals ending midnight Sunday.
4-inch depth soil temperature: Clinton 70 degrees. Columbia 75 degrees. Barnwell 64 degrees. Mullins 60 degrees
Most South Carolina river stages were normal. The Waccamaw near Longs was above normal. The Savannah River and tributaries were below normal.
Charleston Harbor water temperature: 76 degrees.
Capers Nearshore Buoy (Station 41029): 77 degrees.
