National Weather Service United States Department of Commerce

A stalled frontal boundary and ample monsoonal moisture will lead to flash flood potential from the Great Basin to the Great Plains tonight and Tuesday

A stalled frontal boundary will set up along the southern and central Rockies for the next couple of days providing focus for showers and thunderstorms. In addition, ample monsoonal moisture will stream in across the southwest bringing enough moisture to introduce a flash flood threat from the Great Basin and Southwest eastward across the central and southern Rockies into the adjacent Plains.
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Current Conditions

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Lewiston ID

7 Day Forecast

For More Weather Information:

Spokane, WA Local Forecast Office

Overnight

Mostly Clear

Mostly
Clear

Low: 22 °C

Tuesday

Hot

Hot

High: 40 °C

Tuesday
Night

Partly Cloudy

Partly
Cloudy

Low: 22 °C

Wednesday

Slight Chance Thunderstorms Chance for Measurable Precipitation 20%

Slight Chc
Thunderstorms

High: 37 °C

Wednesday
Night

Slight Chance Thunderstorms Chance for Measurable Precipitation 20%

Slight Chc
Thunderstorms

Low: 21 °C

Thursday

Hot

Hot

High: 38 °C

Thursday
Night

Partly Cloudy

Partly
Cloudy

Low: 21 °C

Friday

Slight Chance Thunderstorms Chance for Measurable Precipitation 20%

Slight Chc
Thunderstorms

High: 37 °C

Friday
Night

Slight Chance Thunderstorms Chance for Measurable Precipitation 20%

Slight Chc
Thunderstorms

Low: 21 °C

Detailed Forecast

  • Overnight Mostly clear, with a low around 22. Calm wind.
  • Tuesday Sunny and hot, with a high near 40. Calm wind becoming north 5 to 8 km/h in the afternoon.
  • Tuesday Night Partly cloudy, with a low around 22. West wind 11 to 16 km/h becoming light after midnight.
  • Wednesday A 20 percent chance of showers and thunderstorms after 11am. Partly sunny and hot, with a high near 37. West wind 5 to 11 km/h.
  • Wednesday Night A 20 percent chance of showers and thunderstorms before 11pm. Partly cloudy, with a low around 21. West wind 5 to 10 km/h.
  • Thursday Mostly sunny and hot, with a high near 38.
  • Thursday Night Partly cloudy, with a low around 21.
  • Friday A 20 percent chance of showers and thunderstorms. Mostly sunny and hot, with a high near 37.
  • Friday Night A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 21.
  • Saturday A 20 percent chance of showers and thunderstorms. Mostly sunny and hot, with a high near 38.
  • Saturday Night A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 22.
  • Sunday Mostly sunny and hot, with a high near 39.
  • Sunday Night A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 24.
  • Monday A 20 percent chance of showers and thunderstorms. Mostly sunny and hot, with a high near 36.