Severe Thunderstorms in the Ohio Valley and Mid-Atlantic; Heat Continuing in the Central U.S.

Widespread strong to severe thunderstorms are expected from the Upper Ohio Valley into the Mid-Atlantic through Friday, with damaging winds as the primary threat. Dangerous heat will continue from the South-Central U.S. to the Midwest, Ohio/Tennessee valleys, and Mid-Atlantic. Widespread Major to Extreme Heat Risk is forecast into the weekend and will confine to the South-Central U.S. by Labor Day Read More >

Hazardous Weather Conditions

Flash Flood Watch in effect from September 3, 03:00 PM MDT until September 4, 07:00 PM MDT

Current conditions at

Ontario Municipal Airport (KONO)

Lat: 44.01424°NLon: 117.00808°WElev: 2185.0ft.

Rain

48°F

9°C

Humidity	87%
Wind Speed	NW 9 MPH
Barometer	29.9 in (1012.53 mb)
Dewpoint	45°F (7°C)
Visibility	7.00 mi
Wind Chill	44°F (7°C)
Last update	03 Sep 11:00 PM MDT

More Information:

Local Forecast Office More Local Wx 3 Day History Hourly Weather Forecast

Extended Forecast for

Payette ID

Flash Flood Watch until September 4, 07:00pm

Click here for hazard details and duration

Flash Flood Watch

Flash Flood Watch until September 4, 07:00pm
NOW until 7:00pm Fri
Flash Flood Watch
Tonight
Low: 47 °F
Showers and
Patchy Fog
Friday
High: 66 °F
Areas Fog
then Slight
Chance
Showers
Friday Night
Low: 45 °F
Patchy Fog
then Slight
Chance
Showers and
Areas Fog
Saturday
High: 72 °F
Areas Fog
then Sunny
Saturday Night
Low: 50 °F
Mostly Clear
then Chance
Showers and
Patchy Fog
Sunday
High: 74 °F
Chance
Showers and
Areas Fog
Sunday Night
Low: 50 °F
Showers
Likely and
Patchy Fog
Labor Day
High: 70 °F
Chance
Showers and
Patchy Fog
then Slight
Chance
Showers

Detailed Forecast

Tonight

Showers and possibly a thunderstorm before 3am, then a chance of showers. Patchy fog. Low around 47. Calm wind. Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Friday

A slight chance of showers between noon and 1pm. Areas of fog before 11am. Otherwise, mostly cloudy, then gradually becoming sunny, with a high near 66. Calm wind. Chance of precipitation is 20%.

Friday Night

A slight chance of showers between midnight and 4am. Patchy fog after 9pm. Otherwise, partly cloudy, with a low around 45. Light and variable wind. Chance of precipitation is 20%.

Saturday

Areas of fog before 10am. Otherwise, sunny, with a high near 72. Calm wind.

Saturday Night

A 40 percent chance of showers after midnight. Patchy fog after 4am. Otherwise, partly cloudy, with a low around 50. Light north wind.

Sunday

A chance of showers, with thunderstorms also possible after noon. Areas of fog before 10am. Otherwise, partly sunny, with a high near 74. Chance of precipitation is 40%.

Sunday Night

A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after midnight. Patchy fog after 11pm. Otherwise, mostly cloudy, with a low around 50. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Labor Day

A 50 percent chance of showers, mainly before noon. Patchy fog before 9am. Otherwise, partly sunny, with a high near 70.

Monday Night

Patchy fog after 9pm. Otherwise, partly cloudy, with a low around 45.

Tuesday

Areas of fog before 10am. Otherwise, mostly sunny, with a high near 75.

Tuesday Night

Patchy fog. Otherwise, partly cloudy, with a low around 47.

Wednesday

Areas of fog. Otherwise, mostly sunny, with a high near 78.

Wednesday Night

Patchy fog. Otherwise, partly cloudy, with a low around 51.