Yosemite and Mariposa-Madera Lower Sierra are the focus of an updated weather alert for strong thunderstorms issued at 4:11 p.m. on Saturday by the National Weather Service. The alert is in effect until 4:45 p.m.
The storms may bring wind gusts of up to 40 mph and penny-sized hail (0.75 inches).
“At 4:11 p.m., Doppler radar tracked a strong thunderstorm 12 miles northwest of Yosemite Valley, or 25 miles southwest of Twin Lakes, moving northwest at 10 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 Hetch Hetchy, Hetch Hetchy Ranger Station, Gin Flat, White Wolf Campground, Yosemite Creek Campground, Rancheria Falls Wilderness Campground and Hodgdon Meadow Campground.
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, with the majority of these electrifying events occurring during the summer months. Unfortunately, lightning is responsible for claiming the lives of approximately 20 people annually, as reported by 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 protect yourself during a thunderstorm, take these recommendations into consideration:
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 shelter promptly in a safe location, 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.
These precautions help reduce the risk of electrical surges, as lightning can follow conductive pathways.
Wait for the all-clear:
After the last lightning strike or thunderclap, wait at least 30 minutes before resuming outdoor activities.
It’s important to remember that lightning can strike even when a storm seems to have 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, as they 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 no alternative exists, set up camp in a valley, ravine, or other low-lying areas. Remember that a tent offers no protection against lightning.
Do not approach water bodies, wet objects, or metal items. While water and metal don’t 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.
Rainy roadways ahead: Essential safety tips for heavy rain
Heavy rainfall may lead to flooding if prolonged or if there is excessive runoff. Excessive runoff can be a result of saturated ground and/or rainfall intensity. Follow these recommendations from the NWS to stay safe in heavy rain:
Beware of swollen waterways:
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:
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:
On wet roads, reducing your speed is crucial. Ease off the gas pedal gradually and avoid abrupt braking to prevent skidding.
Choose your lane wisely:
Stay toward the middle lanes – water tends to pool in the outside lanes.
Visibility matters:
Enhance your visibility in heavy rain by turning on your headlights. Watch out 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 them swiftly and safely.
Mind your windshield wipers:
Heavy rain can overload the wiper blades. When visibility is so limited that the edges of the road or other vehicles cannot be seen at a safe distance, it is time to pull over and wait for the rain to ease up. It is best to stop at rest areas or other protected areas.
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.
