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South Carolina State Climatology Office
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June 19, 2017 - June 25, 2017


The week began with the interaction of three synoptic features: the sub-tropical high to the east, a slow-moving cold front to the west, and a broad area of low pressure over the central Gulf of Mexico that later became Tropical Storm Cindy. The result was an expansive plume of moist, tropical air that blanketed the southeastern United States through Friday. On Monday morning, the Beaufort Marine Corps Air Station observed a 7:00 a.m. temperature of 81 degrees and a dew point temperature of 77 degrees. Monday's high temperature of 93 degrees occurred at the Chesterfield 3 E NWS COOP site.

On Tuesday, rain and thunderstorms affected the Midlands, Upstate, and Pee Dee. The Greenwood County Airport recorded 2.23 inches. At 3:00 p.m., the CoCoRaHS observer at Greenwood 3.6 W recorded 3.21 inches. There were no reports of severe weather. Charleston International Airport reported 0.46 inches. Many other coastal and Lowcountry stations reported little or no rain. Johnston recorded 80 degrees. Tropical Storm Cindy formed in the Gulf of Mexico Tuesday afternoon.

Widespread rain and drizzle marked the Summer Solstice on Wednesday, and continued Thursday. On Wednesday, the Lake City observer reported a low temperature of 72 degrees, a high temperature of 84 degrees and 0.54 inches of rain. The Darlington observer reported 2.0 inches of rain. On Thursday, the CoCoRaHS observer at Moncks Corner 3.6 E received 3.4 inches of rain beginning at 4:43 p.m. and ending at 8:00 p.m. Thursday evening, June 22.

Abundant tropical moisture, diurnal heating, and the afternoon sea breeze produced coastal rain and thunderstorms on Friday. The high temperature Friday was 95 degrees at the Columbia Metro Airport.

A weakening cold front passed over the state during the weekend and stalled offshore Sunday triggering afternoon rain and thunderstorms. The Anderson County Airport received 1.03 inches of rain Saturday. A 2.72-inch rainfall was reported by the Edisto Island Middleton Plantation COOP observer on Sunday. Many CoCoRaHS observers commented on widespread coastal rain and thunderstorm activity on Sunday. Daufuskie Island 1.7 SW reported receiving 1.62 inches between 3:10 and 4:00 p.m. with light showers lingering late Sunday evening. Sunday's thunderstorm activity produced numerous reports of trees down in Beaufort and Jasper counties The weekend’s highest temperature was 95 degrees at Jamestown on Saturday and Sunday. The lowest weekend temperature was 57.9 degrees on Sassafras Mountain, also on Sunday.

(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 temperatures reported were 95 degrees at the Columbia Metro Airport on June 23, and Jamestown on June 24 and 25.
The lowest official temperature reported was 57.9 degrees on Sassafras Mountain on June 25.
The heaviest official 24-hour rainfall reported was 2.72 inches at Edisto Middleton reported on June 25.
The state average rainfall for the seven-day period was 1.67 inches.


  Weekly Jan 1 Departure
Anderson AP 4.42 28.49 7.0
Greer AP 1.48 28.27 5.7
Charlotte, NC AP 1.77 24.89 4.7
Columbia Metro AP 0.70 28.56 8.1
Orangeburg AP 0.85 19.38 -2.5
Augusta, GA Bush AP 1.45 23.05 1.6
Florence AP 1.46 18.02 -1.2
N Myrtle Beach AP 2.15 16.86 -4.4
Charleston AP 1.00 19.49 -1.4
Savannah, GA AP 1.46 26.43 5.2

Weekly rainfall totals ending midnight Sunday.


4-inch depth soil temperature: Clinton 73 degrees. Columbia 80 degrees. Barnwell 73 degrees. Mullins 70 degrees.


South Carolina river stages were normal to above normal. The lower portion of the Savannah River was below normal.
Charleston Harbor: 84 degrees.
Fripp Nearshore Buoy (Station 41033): 83.1 degrees.

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