UPDATE: Thunderstorms with pea-sized hail in Lee and Sumter counties Monday

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An updated report from the NWS Columbia SC was issued on Monday at 4:46 p.m. for strong thunderstorms until 5:30 p.m. for Lee and Sumter counties.

The storms are expected to bring pea-sized hail (0.25 inches) and wind gusts of up to 55 mph.

"At 4:46 p.m., Doppler radar tracked a strong thunderstorm near Sumter County Airport, or 7 miles northeast of Shaw Air Base, moving east at 30 mph," comments the NWS. "Gusty winds could knock down tree limbs and blow around unsecured objects. Minor damage to outdoor objects is possible."

Locations impacted by the alert include Sumter, Bishopville, Mulberry, Lee State Park, Sumter County Airport, Elliott, Mayesville, Lynchburg, Ashwood, Oswego, Dalzell, Manville, Spring Hill, St. Charles, Cherryvale, Wisacky, Woodrow, Rembert and Shiloh. This includes the following highways: Interstate 20 in South Carolina between mile markers 114 and 126. Interstate 95 between mile markers 141 and 146.

The NWS states, "If outdoors, consider seeking shelter inside a building."

This alert is in effect until 5:30 p.m.

Actions to take when lightning threat is imminent

Lightning hits the United States approximately 25 million times annually. The majority of these strikes happen during the summer, causing around 20 fatalities each year, according to the NWS. The likelihood of lightning increases as a thunderstorm gets closer and reaches its highest point when the storm is directly overhead. This risk decreases as the storm moves away.

Here are tips on how to stay safe during a thunderstorm:

• To minimize risk of being struck by lightning, when going outside, have a plan to get to a safer place.
• If the sky becomes threatening and thunder can be heard, find a safe place to shelter.
• Once indoors, avoid touching corded phones, electrical equipment, plumbing, and windows and doors.
• Wait for 30 minutes after the final lightning or thunder before heading outside again.

If finding indoor shelter is not an option:

• Avoid open fields, the top of a hill, or a ridge top.
• Keep a distance from tall, solitary trees or other elevated structures. When in a forest, stay in proximity to shorter tree groupings.
• If you are in a group, disperse to prevent the current from passing between group members.
• When camping in an open environment, select a campsite in a valley, ravine, or low region. Just remember, tents do not offer protection from lightning.
• Stay away from water, wet items, and metal objects. Water and metal do not attract lightning but they are excellent conductors of electricity.

What to do in the rain on the road?

• Turn on headlights - Even in daylight, using headlights can help improve visibility and let other drivers know where you are.
• On the road - Drive in the middle lanes and stay on high ground. Rainwater tends to stockpile on the edges of roads.
• Keep clear of puddles - Driving through puddles or low rainwater areas can cause vehicles to hydroplane or skid out of control
• Maintain a safe distance from large vehicles - Trucks or buses can produce a water spray that hampers visibility.
• Avoid flooded zones - If you encounter a flooded road, make a U-turn and go back. The powerful currents of flash floods can carry drivers off the road. Driving through deep water can also damage a vehicle's mechanical and electrical systems.

What is hydroplaning?

Hydroplaning occurs when a vehicle begins to slide uncontrollably on wet roads.

This happens when water in front of the tire builds up faster than the vehicle's weight can push water out of the way. The water pressure then causes the vehicle to rise and slide on a thin layer of water between the tires and the road, making the driver lose control. The top three contributors to hydroplaning are:

1. Vehicle speed - When a vehicle's speed increases, the tire-traction grip and ability to control the vehicle decreases. Drive at a reduced speed during wet weather.
2. Water depth - The deeper the water, the sooner a vehicle loses traction on the road. It doesn't matter how deep the water is, even a thin layer can lead to hydroplaning.
3. Tire tread depth - Checking your tire tread before hitting the road is important, as low or no tread can lead to sliding.

In the event of your vehicle hydroplaning, here's what to know:

• Ease off the accelerator - Step off the gas to slow down the vehicle until the tires find traction.
• Turn into the skid - Turning into the skid can help the vehicle's tires realign to regain control.
• Make sure the tires reconnect with the road - During the skid, wait until the tires reconnect with the road and then gently straighten the wheels to regain control.
• Brake gently as needed - Brake normally if the vehicle has anti-lock brakes and pump brakes gently if in an older vehicle.

Source: The National Weather Service

United Robots South Carolina

This story was originally published June 22, 2026 at 4:06 PM.