WEEKLY SOUTH CAROLINA WEATHER 2021

June 28, 2021 - July 4, 2021

WEATHER SUMMARY:

On Monday, June 28, Tropical Depression four strengthened into Tropical Storm Danny shortly before making landfall over Pritchards Island, north of Hilton Head Island. Tropical-storm-force wind gusts, up to 50 mph, were observed from Forest Beach to the Isle of Palms, and torrential rainfall impacted portions of the Lowcountry. As the storm pushed inland, the outer bands of Tropical Storm Danny produced gusty winds, and locally heavy rain was reported in parts of the Midlands and Pee Dee. By Tuesday morning, 24-hour rainfall totals from Danny exceeded three inches in Beaufort and Jasper counties, and a CoCoRaHS observer near Bluffton measured 6.22 inches of rainfall.

Behind the remnants of Tropical Storm Danny, the weather pattern shifted back to a more typical, summer-like pattern with diurnal thunderstorm activity and normal temperatures. Overnight lows across the state were in the 70s, with daytime highs reaching the upper 80s to low 90s. Some afternoon thunderstorms caused strong winds, knocking down powerlines in Taylors on Wednesday and producing wind gusts near Lake Murray in Lexington County on Thursday evening. Also, on Thursday, Tropical Storm Elsa formed in the southeast Caribbean.

By Friday, July 2, increased moisture moved in the region ahead of a strong cold front, with periods of heavy rain and thunderstorms early Friday. A few locations in the Midlands measured more than an inch of rain. After the front cleared the state, high pressure settled back into the area to dominate the holiday weekend's weather pattern. Drier air kept dewpoints in the 50s, contributing to low relative humidity values and cooler than normal temperatures, with high temperatures only in the mid- to upper 80s. On Sunday morning, minimum temperatures were up to ten degrees below normal, with some locations dropping into the mid-50s.

(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.)
The highest temperature reported was 95 degrees on July 1 at the NWS station located at the University of South Carolina campus in Richland County.
The lowest temperature reported was 55 degrees at the NWS station near Caesars Head in Greenville County on July 4.
The maximum 24-hour precipitation reported was 1.50 inches at the NWS station in Anderson, ending on the morning of July 2.
The CoCoRaHS station Beaufort 7.0 W (SC-BF-60) reported a 24-hour precipitation total of 6.22 inches, ending on the morning of June 29.
The state average precipitation for the seven-day period was 0.7 inches.

PRECIPITATION:

 Weekly*Since Jan 1Departure
Anderson Airport1.4020.96-3.4
Greer Airport0.8228.333.3
Charlotte, NC Airport0.2820.97-1.2
Columbia Metro Airport0.9623.250.9
Orangeburg Airport1.0418.92M-3.2
Augusta, GA Airport0.1628.625.7
Florence Airport0.6922.851.6
North Myrtle Beach Airport0.9225.805.6
Charleston Air Force Base0.2524.050.6
Savannah, GA Airport0.9122.01M-2.0M
*Weekly precipitation totals ending midnight Sunday. M - denotes total with missing values.                     

SOIL TEMPERATURES:

4-inch depth soil temperature: Clinton: 76 degrees. Columbia: 76 degrees. Barnwell: 71 degrees. Mullins: 65 degrees.

PRECIPITATION AND RIVER STAGES:

For the second week in a row, at least half an inch of rain fell across the entire state during the period. Locations impacted by isolated and slow-moving thunderstorms measured rainfall amounts of two to three inches. Rainfall helped ease dry conditions in the Pee Dee, leading to improvements in the US Drought Monitor designations across the region. CoCoRaHS observers in Beaufort County reported seven-day rainfall totals between four and six inches, with the majority of the rainfall measured from Tropical Storm Danny

Stream gauges in areas that received higher rainfall totals measured slightly above normal flows, including the Black River near Hartsville and the Lynches River at Effingham. After weeks of reporting low streamflow values, the gauge on the Waccamaw River at Longs finally recorded a period of normal flows. Unfortunately, due to limited rainfall in parts of the Midlands, some streamflow gauges along the Wateree measured below normal flows during the period. All rivers across the state continued to record river heights below flood stage.

WATER TEMPERATURES:


Charleston Harbor (CHTS1): 80.4 degrees.
Capers Nearshore Buoy (Station 41029): Not Available.
Fripps Nearshore Buoy (Station 41033): Not Available.