Areas of Severe Thunderstorms and Heat

Scattered severe thunderstorms and excessive rainfall are possible today in the Mid Atlantic, posing a risk for damaging winds and isolated flash flooding. Extreme Heat Warnings are in effect today for northeast Texas into southern Oklahoma and Arkansas. Extreme Heat Warnings are also in effect for the Desert Southwest today into Sunday. Read More >

Hazardous Weather Conditions

Heat Advisory in effect from August 20, 12:00 PM MDT until August 21, 09:00 PM MDT

Current conditions at

Ontario Municipal Airport (KONO)

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

Clear

84°F

29°C

Humidity	21%
Wind Speed	N 0 MPH
Barometer	30.0 in (1015.92 mb)
Dewpoint	41°F (5°C)
Visibility	10.00 mi
Heat Index	81°F (27°C)
Last update	20 Aug 11:53 AM MDT

More Information:

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

Extended Forecast for

2 Miles S Ontario Municipal OR

Heat Advisory until August 21, 09:00pm

Click here for hazard details and duration

Heat Advisory

Heat Advisory until August 21, 09:00pm
NOW until 9:00pm Fri
Heat Advisory
This Afternoon
High: 99 °F
Hot
Tonight
Low: 64 °F
Mostly Cloudy
then Patchy
Smoke
Friday
High: 102 °F
Patchy Smoke
then Mostly
Cloudy
Friday Night
Low: 68 °F
Mostly Cloudy
then Slight
Chance
T-storms
Saturday
High: 97 °F
Slight Chance
T-storms then
Partly Sunny
Saturday Night
Low: 63 °F
Slight Chance
T-storms then
Partly Cloudy
Sunday
High: 91 °F
Hot
Sunday Night
Low: 59 °F
Mostly Clear

Detailed Forecast

This Afternoon

Mostly sunny and hot, with a high near 99. Calm wind becoming west around 5 mph.

Tonight

Patchy smoke after 1am. Mostly cloudy, with a low around 64. Calm wind becoming northwest around 6 mph after midnight.

Friday

Patchy smoke before noon. Partly sunny and hot, with a high near 102. West wind 5 to 7 mph becoming calm in the morning.

Friday Night

A 20 percent chance of showers and thunderstorms after midnight. Mostly cloudy, with a low around 68. Northwest wind 5 to 7 mph.

Saturday

A 20 percent chance of showers and thunderstorms before noon. Partly sunny and hot, with a high near 97. West wind 6 to 8 mph becoming east southeast in the morning.

Saturday Night

A 20 percent chance of showers and thunderstorms before midnight. Partly cloudy, with a low around 63.

Sunday

Sunny and hot, with a high near 91.

Sunday Night

Mostly clear, with a low around 59.

Monday

Mostly sunny and hot, with a high near 92.

Monday Night

Partly cloudy, with a low around 62.

Tuesday

Mostly sunny and hot, with a high near 94.