Hot, humid conditions settled across South Carolina during the first half of the week. Rock Hill noted a heat index value of 108 degrees Monday afternoon. Thunderstorms produced scattered reports of high winds and hail. Pleasant, sunny weather started the weekend as surface winds shifted more southerly. By Sunday, a frontal boundary began to collide with moist tropical air setting the stage for numerous storms. Heavy downpours accompanied by frequent cloud to ground lightning continued into the evening. Statewide temperatures for the period averaged two degrees above normal.
PRECIPITATION AND TEMPERATURE DATA
The maximum observed temperature was 102 degrees on July 9 at Hartsville. The minimum observed temperature was 63 degrees at Blackville on the morning of July 7. The heaviest official 24-hour rainfall was recorded at Clinton with 2.36" ending at 7:00 a.m. on July 7. Statewide rainfall for the period averaged 0.8 inches.
Precipitation Period 1999 Deviation* Temperature Location Total Total From Avg. Maximum Minimum Greer 1.66 20.7 8.0B 94 63 Charlotte, NC 1.81 19.0 4.2B 95 66 Columbia 1.85 20.1 6.9B 95 70 Florence FAA 0.13 21.0 1.3B 93 68 Blackville 0.07 23.2 4.1B 95 63 Augusta, GA 1.64 23.2 2.5B 94 70 Beaufort 0.25 30.1 3.9A 94 74 Charleston 0.65 19.7 7.1B 93 69 Myrtle Beach 1.39 19.2 7.4B 92 72 *A=Above, B=Below
Note: Weekly rainfall amounts are for the prior 24-hrs ending 7 am Monday through ending 7 am Sunday
ENERGY DEMAND AND AGRICULTURAL ADVISORY
Degree Days Actual July 1-11 Cooling Heating Columbia 183 0 Charleston 175 0 Greenville 157 0The Columbia Airport reports an average 4-inch depth soil temperature of 81 degrees.
RIVERS AND SURF
Most river stages are near normal. Surf temperatures at Myrtle Beach and Savannah will average around 82 degrees.