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South Carolina State Climatology Office
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June 5, 2017 - June 11, 2017


An expansive, complex low pressure system centered over Lake Ontario extending southwest into Indiana, coupled with the subtropical high over the western Atlantic to draw up very humid tropical Gulf of Mexico air over the state on Monday. Coastal dew point temperatures along the coast hovered in the 75-78 degree range from MCAS Beaufort to North Myrtle Beach. Inland dew point readings were in a range from 72 to 77 degrees. Barnwell Regional airport and the Manning-Cooper Regional airport both recorded 77 degree dew point values. Myrtle Beach and the Greenville-Spartanburg airports both recorded high (air) temperatures of 88 degrees. The NWS Cooperative observing site at the Sandhill Research Station and Columbia's USC site recorded 93-degree high temperatures. Driven by afternoon high temperatures numerous rain and thunderstorms were observed. Rainfall amounts varied statewide and included measurements of 2.44 inches at Woodruff, 0.92 inches in Anderson, 0.39 in Moncks Corner, 0.84 inches at Shaw AFB, and 0.13 inches at North Myrtle Beach.

A slow-moving cold front plodded across South Carolina triggering continued rain showers and thunderstorms on Tuesday. A CoCoRaHS observer in Mount Pleasant observed 2.48 inches of total rainfall. Overcast skies and periods of broken cloud cover helped moderate high temperatures during the day. After a morning low of 63 degrees Dillon warmed to a high of 83 degrees. Humid, warm southwest winds gave way to a slight drier cooler flow as the front dropped from the Upstate towards the coast. The Lancaster County, Newberry County, and Greenwood County Airports dew points dropped from 70 degrees to 54 degrees. Coastal dew point values moderated only slightly. Hilton Head, Folly Beach, and Georgetown had dew point minimums of 73, 71, and 70 degrees respectively.

Tuesday's slow moving cold front reached the coast on Wednesday and stalled offshore focusing heavy rain over the Lowcountry. The Beaufort Marine Corp Air Station saw 0.97 inches of rain, as Moncks Corner and the Georgetown County Airport both received 1.57 inches. The CoCoRaHS Mount Pleasant 1.9 ESE site recorded 5.0 inches. Wednesday's temperatures ranged from a morning low of 56 degrees at Table Rock to a high of 88 degrees in Manning.

A Thursday morning low temperature of 52.7 degrees on Sassafras Mountain was nearly matched on the coast with Myrtle Beach recording 56 degrees. Marion recorded a morning low temperature of 54 degrees and 52 degree morning dew point. Thursday's high temperature was recorded again at USC, reaching 92 degrees. A stalled frontal boundary remained offshore Thursday bring intermittent rain showers to the beaches. Sullivan’s Island reported a daily total of 2.22 inches Thursday after receiving 3.73 inches the previous day.

High pressure dominated the second weekend in June. Coastal showers on early Friday morning dissipated by afternoon. The Myrtle Beach City observing site measured 1.2 inches of rainfall before coastal skies cleared Friday. A deer dismantled the Fort Mill CoCoRaHS rain gauge late Friday night. Clear conditions and a southerly flow made for a warm weekend. High temperatures Friday and Saturday reached 91 and 92 degrees, respectively, at the University of South Carolina in Columbia. 92 degrees was again reached Sunday at Clarks Hill. Jocassee had the lowest weekend temperature, and of the week, at 51 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 93 degrees at the Sandhill Research Station on June 5.
The lowest official temperature reported was 51 degrees on June 11 at Jocassee.
The heaviest official 24-hour rainfall reported was 3.73 on Sullivan's Island ending on June 7.
The state average rainfall for the seven-day period was 1.0 inches.
The state average temperature for the seven-day period was one degree below the long-term average.


  Weekly Jan 1 Departure
Anderson AP 1.83 23.57 3.8
Greer AP 0.74 26.21 5.4
Charlotte, NC AP 1.15 22.90 4.5
Columbia Metro AP 0.18 24.54 6.5
Orangeburg AP 1.04 17.55 -1.9
Augusta, GA Bush AP 0.12 20.43 1.2
Florence AP 0.73 15.68 -1.4
N Myrtle Beach AP 1.41 14.67 -4.4
Charleston AP 2.32 17.86 -0.3
Savannah, GA AP 0.95 24.97 6.7

Weekly rainfall totals ending midnight Sunday.


4-inch depth soil temperature: Clinton 73 degrees. Columbia 77 degrees. Barnwell 71 degrees. Mullins 68 degrees.


South Carolina river stages were near normal. Charleston Harbor Custom House reported a water temperature of 80 degrees. The Fripp Nearshore Buoy Station 41033 reported a water temperature of 79.5 degrees.

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