There was little change in the weather pattern on Monday, June 7. Maximum temperatures through the period were near normal, ranging from the mid-80s to low 90s, while overnight lows were consistently above normal, observed in the upper 60s to mid-70s. At the Beaufort MCAS, the National Weather Service (NWS) station set a new daily high minimum temperature record of 78 degrees on Monday, breaking the previous record of 77 set in 1975.
With plenty of moisture moving across the area, due to southeasterly and southwesterly flow, heavy rainfall, and isolated severe storms would be the dominant weather story for much of the week. Slow-moving thunderstorms caused localized flooding in some of the low-lying streets in Columbia on Monday; a CoCoRaHS observer near Simpsonville reported 4.30 inches of rain on Tuesday morning and wind damage near Cordova in Orangeburg County on Wednesday.
By Thursday, June 10, there was high pressure offshore with an upper-level trough, continuing to keep the region locked in a warm and humid pattern through the weekend. While widespread severe weather remained unlikely, some isolated severe storms caused damage and heavy rain. Thunderstorms on Thursday produced high winds in Fairfield and Newberry counties, knocking down trees and some powerlines. On Friday evening, storms blew a church steeple into the road and downed multiple powerlines in Cowpens in Spartanburg County. There was a ‘backdoor’ cold front approaching from the north, with another front moving in from the Mississippi Valley on Saturday. Thunderstorms dumped up to six inches of rain in downtown Charleston, prompting flash flood warnings for the city. The two frontal systems started to move through the area on Sunday, triggering another round of storms and keeping the active pattern heading into the next period.
(Note: The highest and lowest official temperatures and highest precipitation totals provided below are based on observations from the National Weather Service (NWS) Cooperative Observer network and the National Weather Service's Forecast Offices.)| Weekly* | Since Jan 1 | Departure | |
|---|---|---|---|
| Anderson Airport | 1.33 | 17.54 | -3.9 |
| Greer Airport | 1.61 | 25.54 | 3.3 |
| Charlotte, NC Airport | 2.34 | 20.05 | 0.5 |
| Columbia Metro Airport | 1.07 | 20.47 | 1.5 |
| Orangeburg Airport | 3.55 | 16.96M | -1.8M |
| Augusta, GA Airport | 5.15 | 26.58 | 6.9 |
| Florence Airport | 2.80 | 20.83 | 2.9 |
| North Myrtle Beach Airport | 0.29 | 20.10 | 3.0 |
| Charleston Air Force Base | 4.33 | 22.12 | 3.2 |
| Savannah, GA Airport | 2.89 | 20.08M | 0.7M |
| *Weekly precipitation totals ending midnight Sunday. M - denotes total with missing values. |
4-inch depth soil temperature: Clinton: 75 degrees. Columbia: 77 degrees. Barnwell: 72 degrees. Mullins: 68 degrees.
Another round of beneficial precipitation fell across portions of the state; however, some heavy rainfall caused flooding problems in Charleston and Columbia during the period. Most of the area measured at least half an inch of rain. The only exception was Horry County, where the NWS station at the North Myrtle Beach Airport recorded 0.29 inches for the week. Widespread amounts of two to three inches were recorded through the Central Savannah River Area and the Midlands, with localized amounts over five inches. CoCoRaHS observers in Charleston reported 24-hour totals over five inches on Sunday morning due to nearly stationary thunderstorms.
The rain continued to ease the persistent dry conditions across portions of the state, especially in parts of the Pee Dee. Gauges that reported below-normal flows last week rose to near normal conditions by Sunday. However, streamflow values across the Waccamaw River basin still below the long-term average for the beginning of June. All rivers across the state continued to record river heights below flood stage.
