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South Carolina State Climatology Office
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WEEKLY SOUTH CAROLINA WEATHER 2017

November 20, 2017 - November 26, 2017

WEATHER SUMMARY:

The week began under a cold dome of high pressure centered over the Ohio River valley. The Monday morning low temperature at Whitmire and Ninety Nine Islands was 23 degrees. Monday's high temperature for the state was 63 degrees at the Charleston Air Force Base. CoCoRaHS observers in Myrtle Beach and Gaffney reported their first frost. On Tuesday high pressure shifted slowly to the east after another cold morning. Cedar Creek reported a low temperature of 24 degrees. With clear skies and an easterly flow on Tuesday, the Charleston Air Force Base again had the state's highest afternoon temperature, reaching 73 degrees at 12:40 p.m.. Late Tuesday, with high pressure centered well offshore, a coastal trough developed and produced rain showers and scattered thunderstorms. Observers in Bamberg and Barnwell counties reported 24-hour rainfall amounts of 0.93 and 1.01 inches respectively. The Beaufort Marine Corps Air Station received 0.37 inches of rain Tuesday night.

A weak cold front passed over the state Wednesday; however, the afternoon temperature still reached a high of 73 degrees at the Orangeburg 2 COOP site. Behind the exiting cold front, northerly winds kept Thanksgiving Day temperatures more seasonable. Chesnee was 29 degrees Thursday morning and the Greenwood County Airport only reached 59 degrees Thursday afternoon under clear skies.

High pressure and dry conditions dominated the state's weather Friday and Saturday. A fast moving cold front swept over the state before sunrise on Sunday without producing any rain. Orangeburg had the weekend's high temperature of 70 degrees on Saturday, and Cedar Creek was 25 degrees Friday and Saturday mornings.

(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 73 degrees at the Charleston Air Force Base on November 21 and at the Orangeburg 2 COOP site on November 22.
The lowest official temperature reported was 23 degrees at the Ninety Nine Islands COOP site and at the Whitmire RAWS site on November 20.
The heaviest official 24-hour rainfall reported was 1.01 inches at the Barnwell 5 ENE COOP site for the period ending on November 22.
The state average rainfall for the seven-day period was 0.2 inches.

PRECIPITATION:

  Weekly* Since Jan 1 Departure
Anderson Airport 0.00 49.11 9.3
Greer Airport 0.00 50.19 7.7
Charlotte, NC Airport 0.21 42.57 4.6
Columbia Metro Airport 0.24 44.13 3.2
Orangeburg Airport 0.66 36.90 -6.1
Augusta, GA Airport 0.02 40.85 1.1
Florence Airport 0.02 37.97 -1.6
North Myrtle Beach Airport 0.21 45.70 -2.4
Charleston Air Force Base 0.43 50.36 2.8
Savannah, GA Airport 0.70 50.67 6.0
*Weekly rainfall totals ending midnight Sunday.                    

SOIL TEMPERATURES:

4-inch depth soil temperature: Clinton 52 degrees. Columbia 55 degrees. Barnwell 49 degrees. Mullins 42 degrees

RIVER STAGES:


Upstate river stages were below normal to much below normal.
Midlands and Pee Dee river stage were normal to below normal.
Lowcountry river stages were normal.

COASTAL OCEAN TEMPERATURES:


Charleston Harbor water temperature: 59 degrees.
Capers Nearshore Buoy (Station 41029): 60 degrees.

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