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South Carolina State Climatology Office
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August 7, 2017 - August 13, 2017


A weak frontal boundary touched off Monday morning rainshowers over the Upstate. A Walhalla CoCoRaHS observer reported 1.4 inches of rain that fell on Monday. Jocassee 8 WNW reported a Monday morning low temperature of 54 degrees. Monday's frontal boundary sagged slowly south over the state on Tuesday and was accompanied by a broad east-west rain shield with imbedded thunderstorms. The North Myrtle Beach Airport received 1.57 inches while the Columbia Metropolitan Airport received a paltry 0.12 inches on Tuesday. Tuesday's high temperature at Columbia Metropolitan Airport only reached 81 degrees due to the cloud cover.

The cold front pushed offshore Wednesday morning and a surface low developed on the boundary offshore. This feature and abundant surface moisture created a swath of heavy rain across Aiken County eastwards to Horry County. Heavy morning rain at Orangeburg Airport totaled 1.01 inches. The Walterboro NWS COOP site reported 3.31 inches. The stalled offshore front triggered coastal thunderstorms on Thursday. A CoCoRaHS observer reported 4.16 inches of rain at Mt. Pleasant 2.7 ENE, while only 1.07 inches fell at the Charleston Air Force base.

Friday morning was foggy across the Midlands with Sumter Air Force Base reporting zero visibility. High pressure ridging built over the state on Friday from the southwest. This ridging tapped into a deep supply of Gulf of Mexico very warm, humid air. Dew point temperatures reached 80 degrees along the coast. The Florence Regional Airport reported a 77-degree dew point. The Columbia Metropolitan Airport reached a high temperature of 91 degrees after a morning low temperature of 74 degrees. A weak tropical disturbance passed along the coast late Friday. The Charleston Executive Airport reported a 20-minute rainfall of 0.86 inches early Saturday morning.

Strong ridging strengthened Saturday ahead of a decaying frontal boundary that capitulated to strong upper-level ridging on Sunday. Saturday's high temperature reached 94 degrees at both the Columbia Metropolitan Airport and Columbia Hamilton-Owens Downtown Airport. The NWS COOP site in Barnwell recorded the state's high temperature of 97 degrees 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 temperature reported was 97 degrees at Barnwell on August 13.
The lowest official temperature reported was 54 degrees at Jocassee 8 WNW on August 7.
The heaviest official 24-hour rainfall reported was 3.31 inches at Walterboro 1 SW ending on August 10.
The state average rainfall for the seven-day period was 2.0 inches.


  Weekly Jan 1 Departure
Anderson Airport 0.56 35.95 6.0
Greer Airport 1.82 36.32 6.3
Charlotte, NC Airport 1.99 32.33 6.2
Columbia Metro Airport 1.30 36.27 7.2
Orangeburg Airport 1.38 27.88 -2.5
Augusta, GA Airport 3.80 33.47 5.0
Florence Airport 1.05 29.60 2.1
North Myrtle Beach Airport 2.74 22.54 -8.1
Charleston Air Force Base 2.38 34.81 3.5
Savannah, GA Airport 2.49 40.06 9.5
*Weekly rainfall totals ending midnight Sunday.                    


4-inch depth soil temperature: Clinton 78 degrees. Columbia 82 degrees. Barnwell 77 degrees.


Most South Carolina river stages were near normal.
Charleston Harbor water temperature: 85 degrees.
Capers Nearshore Buoy (Station 41029): 85 degrees.

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