Severe Weather and Heavy Rain from the Mid-South to the Mid-Atlantic; Building Heat in the West

Severe thunderstorms may bring damaging winds, a couple of tornadoes, and heavy rain across portions of the Mid-Atlantic into the Mid-South. Severe storms may produce hail across the northern/central High Plains. Hazardous heat will linger across the southern U.S. and build across the West through mid-week. Fire weather concerns continue for Interior Alaska and the Four Corners region. Read More >

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Last Map Update: Mon, Jun 22, 2026 at 3:46:24 pm PDT

Watches, Warnings & Advisories

National Weather Service San Francisco Bay Area, CA

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National Weather Service Los Angeles, CA

Lake Wind Advisory

Beach Hazards Statement

Lake Wind Advisory for San Luis Reservoir

Moderate Heat Risk expected by Mid-Week

Warm-Up Mid-Week

Practice Heat Safety

Practice Water Safety

Monday, June 22, 2026, 5-11 PM: Sustained winds of 20-25 mph and gusts up to 35 mph will cause cresting, whitecap waves hazardous to small watercraft on San Luis Reservoir Monday afternoon and evening. Travel along CA-152 between Interstate 5 and Pacheco Pass will also be difficult for high-profile vehicles. Use extra caution if traveling to and recreating at San Luis Reservoir!

Temperatures across Central California expected to reach the Century Mark this week as 100 degree readings will be seen across the San Joaquin Valley. These temperatures will place the Heat Risk at Moderate Levels. At this level, heat-related illnesses to those sensitive to heat, such as older adults (65+), infants, athletes, outdoor workers, those without effective cooling, and those with chronic diseases will be elevated. Some risk to general population.

A warm-up will be on the way over the next few days as a ridge of high pressure builds over the Desert Southwest. There are moderate probabilities for highs in the San Joaquin Valley to exceed 100 degrees Tuesday through Thursday.

Heat can be very taxing on the body and can lead to heat related illnesses or make existing health conditions worse. Everyone can be vulnerable to heat, but some more so than others. Take extra precautions when outside. Wear lightweight and loose fitting clothing. Try to limit strenuous activities to early morning or evening. Take action when you see symptoms of heat exhaustion and heat stroke. Drink plenty of WATER.

If planning on heading out onto the water for some recreational boating or swimming this summer, you should both know the weather forecast before you leave, as well as check on the weather while you’re out. Boating on cold water is inherently very dangerous for the unprepared. You should know some information & facts about safe boating and swimming before you go out. Even in the summer, prolonged immersion in water temperatures below 70 degrees Fahrenheit can produce hypothermia. Always carry a life jacket.