####018005105#### WTUS82 KCAE 310305 HLSCAE GAZ063>065-077-SCZ022-027>031-035-037-038-041-135>137-311115- Tropical Storm Idalia Local Statement Advisory Number 18 National Weather Service Columbia SC AL102023 1105 PM EDT Wed Aug 30 2023 This product covers the Midlands of central South Carolina and east central Georgia CSRA NEW INFORMATION --------------- * CHANGES TO WATCHES AND WARNINGS: - The Tropical Storm Warning has been cancelled for Aiken, Barnwell, Burke, Columbia, Kershaw, Lexington, McDuffie, Richland, and Richmond * CURRENT WATCHES AND WARNINGS: - A Tropical Storm Warning is in effect for Bamberg, Calhoun, Central Orangeburg, Clarendon, Lee, Northwestern Orangeburg, Southeastern Orangeburg, and Sumter * STORM INFORMATION: - About 60 miles east-southeast of Orangeburg SC or about 70 miles south-southeast of Sumter SC - 33.0N 80.0W - Storm Intensity 60 mph - Movement Northeast or 45 degrees at 21 mph SITUATION OVERVIEW ------------------ Tropical Storm Idalia will move northeast along eastern South Carolina through tonight. A flash flooding threat continues across the eastern Midlands and Pee Dee. Rainfall totals of 4 to 8 inches are expected in those areas. Tropical Storm force wind gusts 40 to 50 mph are also possible, but winds should slowly diminish after Midnight. POTENTIAL IMPACTS ----------------- * FLOODING RAIN: Potential impacts from the flooding rain are still unfolding across the eastern Midlands. Remain well guarded against life-threatening flood waters having possible extensive impacts. If realized, these impacts include: - Major rainfall flooding may prompt many evacuations and rescues. - Rivers and tributaries may rapidly overflow their banks in multiple places. Small streams, creeks, canals, arroyos, and ditches may become dangerous rivers. In mountain areas, destructive runoff may run quickly down valleys while increasing susceptibility to rockslides and mudslides. Flood control systems and barriers may become stressed. - Flood waters can enter many structures within multiple communities, some structures becoming uninhabitable or washed away. Many places where flood waters may cover escape routes. Streets and parking lots become rivers of moving water with underpasses submerged. Driving conditions become dangerous. Many road and bridge closures with some weakened or washed out. Potential impacts from the flooding rain are still unfolding across the eastern Midlands. Remain well guarded against dangerous flood waters having additional significant impacts. Elsewhere across the Midlands of central South Carolina and east central Georgia CSRA, little to no impact is anticipated. * WIND: Potential impacts from the main wind event are now unfolding across the eastern Midlands. Remain well sheltered from dangerous wind having possible significant impacts. If realized, these impacts include: - Some damage to roofing and siding materials, along with damage to porches, awnings, carports, and sheds. A few buildings experiencing window, door, and garage door failures. Mobile homes damaged, especially if unanchored. Unsecured lightweight objects become dangerous projectiles. - Several large trees snapped or uprooted, but with greater numbers in places where trees are shallow rooted. Several fences and roadway signs blown over. - Some roads impassable from large debris, and more within urban or heavily wooded places. A few bridges, causeways, and access routes impassable. - Scattered power and communications outages, but more prevalent in areas with above ground lines. Potential impacts from the main wind event are also now unfolding across the eastern Midlands. Remain well sheltered from hazardous wind having possible limited impacts. Elsewhere across the Midlands of central South Carolina and east central Georgia CSRA, little to no impact is anticipated. PRECAUTIONARY/PREPAREDNESS ACTIONS ---------------------------------- * OTHER PREPAREDNESS INFORMATION: Now is the time to stay inside and away from windows. Listen for updates and be ready in case you lose electrical power. Keep a battery-powered radio, charged cell phone and flashlight handy. If you are prone to flooding, be prepared for the possibility of a quick and dramatic rise in water levels. * ADDITIONAL SOURCES OF INFORMATION: - For information on appropriate preparations see ready.gov - For information from the state of South Carolina see scemd.org - For information from the state of Georgia see gema.ga.gov NEXT UPDATE ----------- The next local statement will be issued by the National Weather Service in Columbia SC around 5 AM, or sooner if conditions warrant. $$