Areas of Excessive Rainfall and Dangerous Heat

Heavy to severe thunderstorms may bring areas of excessive rainfall and flooding over parts of the southern Plains through Friday. Hot to dangerously hot temperatures are forecast again across portions of the Pacific Northwest and southern Great Basin Tuesday. Read More >

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Last Map Update: Mon, Jun 9, 2025 at 8:52:31 pm PDT

Watches, Warnings & Advisories

National Weather Service San Francisco Bay Area, CA

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National Weather Service Los Angeles, CA

Extreme Heat Warning

Small Craft Advisory

Monday Afternoon Thunderstorm Potential

Triple Digits This Week

Moderate Heat Risk Today and Tomorrow

Stay Safe Around Area Lakes and Rivers

Thunderstorms may develop again this afternoon as they have done for the past few days, with the Sierra Nevada crest seeing a 10 to 20% chance for these storms to form. Erratic winds, small hail, and localized heavy rainfall may accompany these storms in addition to cloud-to-ground lightning.

An upper level ridge is expected to cause well above normal temperatures this week, mainly today through Wednesday, with the Valley seeing a 40 to 60% chance for triple digits. The warmest day is expected to be tomorrow with chances for triple digits upwards of 70 to 90 percent in the larger cities. These temperatures will bring about a moderate risk of 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. There is some risk to the general population.

Moderate Heat Risk is expected for Today and Tuesday across the San Joaquin Valley with maximum temperatures approaching 100 degrees. This level of heat can cause heat-related illnesses to those sensitive to heat, such as older adults, infants, athletes, outdoor workers, and those without effective cooling. Stay hydrated, wear lightweight, light-colored clothing, and reduce time spent outdoors or stay in the shade.

With near-triple-digit heat anticipated for this week, keep in mind that area lakes and rivers are still running cold. Warm air temperatures do NOT mean warm water temperatures! Rivers in particular are running swift as dam water releases are increasing across the region. Continue to take precautions around waterways!