An onshore surface wind helped develop thunderstorms on Monday across the central and southern coastal counties. Heavy rains on Tuesday caused flash flooding in Charleston County. Warm weather was observed Thursday and Friday before a frontal boundary passed with strong thunderstorms on Friday afternoon. A wind gust of 73 mph was recorded on Lake Thurmond. Clouds were slow to exit on Saturday and resulted in below normal high temperatures in the 70's. Sunday morning temperatures fell into the 50's and later climbed to near 80 degrees under mostly sunny skies. For the period, the state average temperature was two degrees below normal.
The highest official temperature reported was 87 degrees at Cades, Chesterfield, Cheraw, Sandhill, and Orangeburg on May 19. The lowest official temperature reported was 44 degrees at Caesars Head on the morning of May 16. The heaviest 24-hour rainfall reported was 2.02 inches at Clarks Hill ending at 7:00 a.m. on May 21. The average statewide rainfall for the period was 1.3 inches.
PRECIPITATION AND TEMPERATURE DATA
Precipitation Weekly Jan 1 Deviation Total Total From Avg Greer 1.76 17.5 -3.3 Columbia 1.74 15.3 -2.9 Orangeburg 1.30 15.5 -2.6 Charlotte, NC 0.44 15.1 -2.4 Augusta, GA 2.34 19.3 1.1 Florence 1.29 12.9 -3.2 Myrtle Beach 0.25 11.4 -3.7 Charleston 1.33 14.0 -2.3 Savannah, GA 1.98 16.7 0.5 Weekly rainfall totals ending midnight Sunday.
SOIL: 4 inch depth average soil temperature: Columbia 73 degrees.
RIVERS AND SURF: South Carolina river stages were near normal. Surf temperatures at Myrtle Beach and Savannah will average around 70 degrees.