Yosemite, Yosemite Valley, Mariposa Madera Foothills and Mariposa-Madera Lower Sierra were placed under an updated report for strong thunderstorms by the National Weather Service on Thursday at 8:29 p.m. The alert is in effect until 9 p.m.

The storms are packing pea-sized hail (0.25 inches).

“At 8:29 p.m., Doppler radar tracked a strong thunderstorm over Bootjack, or 16 miles west of Yosemite South Entrance, moving northeast at 30 mph,” states the NWS Hanford CA. “Minor hail damage to vegetation is possible.”

Locations impacted by the alert include Yosemite National, Bootjack, Yosemite Valley, Mariposa, Tamarack Flat Campground, Metcalf Gap, El Portal, Badger Pass Ranger Station, Camp 4 Campground, Wawona Campground, Hodgdon Meadow Campground, Yosemite Glacier Point, Gin Flat, Wawona Vistor Center, Jerseydale, Bridalveil Creek Campground, Crane Flat Campground, Crane Flat and Wawona.

The NWS said, “If outdoors, consider seeking shelter inside a building. Torrential rainfall is also occurring with this storm and may lead to localized flooding. Do not drive your vehicle through flooded roadways. Frequent cloud to ground lightning is occurring with this storm. Lightning can strike 10 miles away from a thunderstorm. Seek a safe shelter inside a building or vehicle. This storm may intensify, so be certain to monitor local radio stations and available television stations for additional information and possible warnings from the National Weather Service.”

When lightning looms: Expert safety tips for thunderstorms

Lightning strikes the United States approximately 25 million times each year, mostly during the summer. Lightning claims the lives of about 20 people annually, according to the NWS. The risk of lightning-related incidents escalates as thunderstorms draw near, reaching its peak when the storm directly looms overhead. However, it gradually recedes as the tempest moves

To ensure your safety during a thunderstorm, consider the following recommendations:

Lightning safety plan:

When venturing outdoors, it’s crucial to have a lightning safety plan in place.
Stay vigilant by monitoring the sky for ominous signs and listening for the telltale sound of thunder. If thunder is audible, it’s a clear indication of nearby lightning.
Seek a safe place to shelter, preferably indoors.

Indoors safety measures:

Once you’ve found shelter indoors, abstain from using corded phones, electrical appliances, or plumbing fixtures, and refrain from approaching windows and doors.
Lightning can follow conductive pathways, and these precautions reduce the risk of electrical surges.

Wait for the all-clear:

After the last lightning strike or thunderclap, wait at least 30 minutes before resuming outdoor activities.
Lightning can strike even when a storm has seemingly passed, so exercise caution.

When indoor shelter isn’t available:

If you find yourself outdoors without access to indoor shelter during a thunderstorm, take these steps to maximize your safety:

Avoid open fields, hilltops, or ridge crests, which expose you to greater lightning risk.
Steer clear of tall, isolated trees and other prominent objects. In forested areas, stay close to lower stands of trees.
If you’re in a group, ensure that individuals are spaced out to prevent lightning current from transferring between people.
Camping in an open setting during a thunderstorm is strongly discouraged. If you have no alternative, set up camp in a valley, ravine, or other low-lying areas. It’s crucial to note that a tent provides no protection against lightning.
Do not approach water bodies, wet objects, or metal items. Although water and metal do not attract lightning, they conduct electricity effectively and can pose significant risks.

In summary, when facing the threat of lightning, vigilance and preparedness are your best allies. By following these guidelines, you can significantly reduce the chances of lightning-related accidents and prioritize your safety.

Driving through downpours: Safety guidelines for wet roads

When heavy rain sets in, the risk of flooding and hazardous driving conditions rises. Whether it’s prolonged rainfall or rapid runoff, being prepared is essential. Here are some valuable safety tips from the NWS to ensure you stay safe in heavy rain:

Beware of rapid water flow:

In heavy rain, refrain from parking or walking near culverts or drainage ditches, where swift-moving water can pose a grave danger.

Maintain safe driving distances:

Adhere to the two-second rule for maintaining a safe following distance behind the vehicle in front of you. In heavy rain, allow an additional two seconds of distance to compensate for reduced traction and braking effectiveness.

Reduce speed and drive cautiously:

If it is raining and the roads are wet, slow down. Take your foot off the accelerator and let your speed drop gradually. Never use the brakes suddenly because this may cause the car to skid.

Choose your lane wisely:

Stick to the middle lanes to minimize the risk of hydroplaning. Outer lanes are more prone to accumulating water.

Prioritize visibility

Turn on your headlights and be careful of other vehicles to the rear and in blind spot areas as they are especially difficult to see through rain-spattered windows.

Watch out for slippery roads:

Be extra careful during the first half hour after rain begins. Grime and oil on the road surface mix with water to make the road slippery.

Keep a safe distance from large vehicles:

Don’t follow large trucks or buses too closely. The spray created by their large tires reduces your vision. Take care when passing them as well; if you must pass, do so with caution.

Mind your windshield wipers:

Overloaded wiper blades can hinder visibility. If rain severely impairs your vision, pull over and wait for conditions to improve. Seek refuge at rest areas or sheltered spots.

If the roadside is your only option, pull off as far as possible, preferably past the end of a guard rail, and wait until the storm passes. Keep your headlights on and turn on emergency flashers to alert other drivers of your position.

In the face of heavy rain, these precautions can make a significant difference in ensuring your safety on the road. Remember to stay informed about weather conditions and heed guidance from local authorities for a secure journey.