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Thunderstorms with pea-sized hail in Yosemite Friday – wind gusts up to 40 mph

April 10, 2026

Yosemite, Yosemite Valley, Mariposa Madera Foothills and Mariposa-Madera Lower Sierra are included in a weather alert for strong thunderstorms by the National Weather Service on Friday at 2:54 a.m. The alert is in effect until 3:30 a.m.

The storms are forecast to bring pea-sized hail (0.25 inches) and wind gusts of up to 40 mph.

“At 2:54 a.m., Doppler radar tracked a strong thunderstorm near Bootjack, or 10 miles west of Yosemite South Entrance, moving north at 25 mph,” says the NWS Hanford CA. “Gusty winds could knock down tree limbs and blow around unsecured objects. Minor hail damage to vegetation is possible.”

Locations impacted by the alert include Yosemite National, Bootjack, Tamarack Flat Campground, Metcalf Gap, El Portal, Jerseydale, Crane Flat Campground, Badger Pass Ranger Station, Wawona Campground and Crane Flat.

The NWS said, “If outdoors, consider seeking shelter inside a building. 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

Each year, lightning strikes the United States approximately 25 million times, mostly during the summer. It claims the lives of about 20 people annually, according to the NWS. The threat of lightning becomes more pronounced as thunderstorms draw nearer, peaking when the storm is directly overhead and gradually waning as it moves away.

To ensure your safety during a thunderstorm, keep these recommendations in mind:

Lightning safety plan:

When venturing outdoors, it’s vital to establish a clear plan for seeking shelter in case of lightning.
Monitor the sky for threatening signs and listen for the sound of thunder. If thunder is audible, it’s an indication that lightning is nearby.
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 with no 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 with a group, ensure individuals are spread 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, preparedness and vigilance are your best allies. By following these guidelines, you can significantly reduce the likelihood of lightning-related incidents and prioritize your safety.

Driving through downpours: Safety guidelines for wet roads

When heavy rain strikes, safety is paramount. Equip yourself with these guidelines from the NWS to navigate wet roads and avoid hazards:

Beware of rapid water flow:

Avoid parking or walking in close proximity to culverts or drainage ditches, as the swiftly moving water during heavy rain can potentially carry you away.

Maintain safe driving distances:

The two-second rule for following distance is your ally in heavy rain. Extend it to four seconds to ensure safe spacing in adverse conditions.

Reduce speed and drive cautiously:

On wet roads, slowing down is paramount. Gradually ease off the accelerator and avoid abrupt braking to prevent skidding.

Choose your lane wisely:

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

Visibility matters:

Enhance your visibility in heavy rain by activating your headlights. Be particularly vigilant for vehicles in blind spots, as rain-smeared windows can obscure them.

Watch out for slippery roads:

The first half-hour of rain is when roads are slickest due to a mix of rain, grime, and oil. Exercise heightened caution during this period.

Keep a safe distance from large vehicles:

Large trucks and buses can reduce your visibility with tire spray. Avoid tailgating and pass with caution.

Mind your windshield wipers:

Overloaded wiper blades can hinder visibility. If rain severely limits your sight, pull over and wait for conditions to improve. Seek refuge at rest areas or protected 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.

By following these safety measures, you can significantly reduce risks and ensure your well-being when heavy rain pours down. Stay informed about weather conditions and heed advice from local authorities to make your journey safe and sound.

For more local weather alerts, visit our Weather Advisory page

Thunderstorms with pea-sized hail in Yosemite Friday – wind gusts up to 40 mph Orange County Register

News Details

Thunderstorms with pea-sized hail in Yosemite Friday – wind gusts up to 40 mph

When lightning looms: Expert safety tips for thunderstorms

Driving through downpours: Safety guidelines for wet roads

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