Weather ImpactsUpcomingHappening 21 August 2026

Severe Storms and Excessive Heat Forecast for Grand Strand Friday Afternoon

A Level 2 severe weather risk brings potential for dangerous lightning, damaging wind gusts, and heavy downpours across the Grand Strand this afternoon and evening.

Why this matters locally

High heat indices followed by severe afternoon storms create dangerous outdoor conditions, coastal flooding risks, and potential power disruptions for residents, beachgoers, and commuters.

Residents and visitors across the Grand Strand are advised to prepare for severe weather as a cold front moves into the area, bringing a Level 2 severe weather risk this afternoon and evening. High heat and humidity will persist prior to the storms, with temperatures climbing into the upper 90s and heat index values reaching between 105 and 110 degrees. A Heat Advisory remains in effect for both Horry and Georgetown counties throughout the early afternoon hours.

The primary window for strong to severe storm development is expected between 2:00 PM and 8:00 PM. Storms are forecast to initiate along the coast and sea breeze front before spreading across the region. These systems have the potential to produce extreme lightning, with intense storms generating between 300 and 500 strikes every 30 minutes.

In addition to lightning, localized severe hazards include damaging wind gusts capable of bringing down trees and power lines in isolated neighborhoods. Heavy downpours could produce rainfall rates of 4 to 5 inches per hour, creating a risk of flash flooding in small streams, low-lying areas, and locations with poor drainage.

Rain and storm chances will continue into Saturday, August 22, though overall storm coverage is expected to decrease compared to Friday. Weather conditions are forecast to improve by Sunday, August 23, bringing drier air and more favorable conditions for outdoor activities.

Local officials and meteorologists recommend staying indoors during active thunder and lightning. Drivers should exercise caution on coastal roadways and avoid driving through flooded intersections. Residents are encouraged to monitor local weather broadcasts or use mobile weather tracking applications for real-time radar and automated alerts.

Quick facts

  • Event: Level 2 Severe Weather Risk & Heat Advisory
  • Location: Horry and Georgetown Counties / Grand Strand
  • Peak Storm Window: Friday, August 21, 2026, from 2:00 PM to 8:00 PM
  • Primary Threats: Frequent lightning, damaging winds, localized flash flooding
  • Weekend Outlook: Storms remain likely Saturday; drier conditions return Sunday

Community brief · prepared from WMBF News — Grand Strand material · original source

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