Thunderstorms and Heavy Rainfall in the Plains; Hazardous Heat in the South and Southeast

Severe thunderstorms will be possible across the northern/central Plains through Tuesday afternoon and from the central Plains to the Mid-Mississippi Valley Tuesday evening through Wednesday morning. Storms may produce large hail and damaging wind gusts, and heavy rainfall may lead to scattered instances of flash flooding. Meanwhile, hazardous heat persists across the South and Southeast. Read More >

Current conditions at

Ontario Municipal Airport (KONO)

Lat: 44.01424° N Lon: 117.00808° W Elev: 2185.0 ft.

Clear

68°F

20°C

Humidity 64%
Wind Speed W 5 MPH
Barometer 29.99 in (1015.58 mb)
Dewpoint 55°F (13°C)
Visibility 10.00 mi
Last update 18 Aug 01:20 AM MDT
Detailed forecast for

Oregon Lower Treasure Valley

Today
Sunny. Patchy smoke. Highs 93 to 98. Northwest winds up to 10 mph.
Tonight
Mostly clear. Lows 62 to 68. Northwest winds 10 to 15 mph with gusts to 25 mph.
Wednesday
Sunny. Highs 93 to 98. Northwest winds up to 10 mph in the morning, becoming light in the afternoon.
Wednesday Night
Mostly clear. Lows 62 to 68. Light winds in the evening, becoming northwest up to 10 mph after midnight.
Thursday
Sunny. Highs 95 to 100. Northwest winds up to 10 mph in the morning, becoming light in the afternoon.
Thursday Night
Increasing clouds. Lows 65 to 71.
Friday And Friday Night
Mostly cloudy. Highs 95 to 100. Lows 66 to 71.
Saturday
Partly sunny in the morning, then clearing. Highs 90 to 95.
Saturday Night Through Monday
Mostly clear. Lows 60 to 66. Highs 89 to 95.



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1236 AM MDT Tue Aug 18 2026
 
 

Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database