Severe Weather and Heavy Rainfall from the Midwest to the Ohio Valley; Mid-Summer Heat Continues

Severe thunderstorm and heavy rainfall threats will persist from the Midwest to Lower Great Lakes through Monday, shifting into the Ohio Valley and Central Appalachians Monday evening into Tuesday. Mid-summer heat will continue across much of the CONUS this week, with record highs possible well into the 100s across the south-central High Plains. Read More >

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Last Map Update: Sun, Aug 9, 2026 at 5:08:29 pm PDT

Watches, Warnings & Advisories

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National Weather Service Salt Lake City, UT

National Weather Service San Joaquin Valley, CA

National Weather Service NWS Flagstaff, AZ

Flash Flood Warning

Extreme Heat Warning

Heat Advisory

Air Quality Alert

Extreme Heat Warning

Heat Advisory

Thunderstorm Outlook

Cooling Trend

Weather History

An Extreme Heat Warning is in effect for parts of Northern and Central Nevada until 11 PM PDT this evening. This will result in a major risk for heat-related illnesses, especially for those without effective cooling. Heat related illnesses, such as heat exhaustion and heat stroke are possible for much of the population if precautions are not taken. Drink plenty of fluids, stay out of the sun, and remain in an air-conditioned room.

A Heat Advisory is in effect for parts of Eastern Nevada until 11 PM PDT this evening. This will result in a moderate risk for heat-related illnesses. Although heat events like this are relatively common and happen many times a year, heat-related impacts are possible for those new to the area if simple precautions are not taken. Plan to take action to reduce time outdoors, drink plenty of water, and remain in air-conditioned buildings. Heat-sensitive groups, such as the elderly, young children, and those with chronic ailments may need assistance to avoid heat-related illnesses. As always, never, ever leave a child or pet in an enclosed automobile.

Isolated thunderstorms are expected in parts of Northern and Central Nevada from 12 PM PDT this afternoon until 8 PM PDT this evening. A few of these thunderstorms could be strong. The primary thunderstorm hazards will be wind gusts near 55 mph and dangerous cloud to ground lightning strikes.

High temperatures throughout Northern and Central Nevada this afternoon will be around five degrees above normal for this time of year. A cooling trend is expected Monday through Friday. By Friday afternoon, maximum temperatures across Northern and Central Nevada will be six to eight degrees below seasonal values.