Heavy Rainfall Continues in Hawaii; Severe Thunderstorms and Heavy Rainfall in the Plains and Southern Appalachians

Areas of gusty winds, heavy rain leading to flash flooding, and high surf continue across portions of Hawaii as Tropical Storm Lala continues to move away from the islands. Severe thunderstorms and heavy rainfall will shift into the southern Appalachians today. Strong to severe thunderstorms may produce large hail, scattered wind gusts, and heavy rain today across the northern and central Plains. Read More >

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Last Map Update: Mon, Aug 17, 2026 at 11:28:40 am 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

Heat Advisory

Small Craft Advisory

Lake Wind Advisory

Gusty Lake Isabella Winds

Warming Trend in Temperatures This Week

Monday, August 17, 2026: Winds gusting to 30 MPH will impact Lake Isabella through this evening. A Lake Wind Advisory is in effect for this area until 8 PM PDT this evening. Strong winds and rough waves will create hazardous conditions for small craft. Travel may be difficult, especially for high profile vehicles. Use extra caution if recreating or traveling through the area.

After 100-degree heat took hold over central California the last few weeks, more seasonable temperatures are expected this week. Widespread Minor Heat Risk will develop, which is heat tolerated by most of the population, but can cause heat-related illnesses to those extremely sensitive to heat such as older adults (65+), infants, those without effective cooling, and those with chronic diseases (heart disease, obesity, poor blood circulation). Heat Risk will slowly rise to more widespread Moderate Heat Risk as temperatures begin warming.

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Heavy Rainfall Continues in Hawaii; Severe Thunderstorms and Heavy Rainfall in the Plains and Southern Appalachians

NWS Forecast Office Hanford, CA