Air Quality Concerns; Fire Weather; Extreme Heat; Severe Thunderstorms and Flash Flooding

Wildfire smoke continues to result in poor air quality from the Upper Midwest into the Northeast. Dangerous heat and fire weather concerns for portions of the Four Corners region into the central Great Basin and Rockies. Heavy rainfall and flash flooding possible for the Southeast through today. Strong to severe thunderstorms for the Southern Plains with severe wind gusts and large hail possible. Read More >

Hazardous Weather Conditions

Severe Thunderstorm Watch in effect from August 4, 04:40 PM MDT until August 4, 11:00 PM MDT

Current conditions at

HORSE THIEF (HORM8)

Lat: 46.42581°NLon: 108.6745°WElev: 3414.0ft.

77°F

25°C

Humidity	38%
Wind Speed	W 10 MPH
Barometer	NA
Dewpoint	49°F (9°C)
Visibility	NA
Heat Index	78°F (26°C)
Last update	04 Aug 05:39 PM MDT

More Information:

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

Extended Forecast for

Roundup MT

Severe T-storm Watch until August 4, 11:00pm

Click here for hazard details and duration

...

Severe T-storm Watch until August 4, 11:00pm
NOW until 11:00pm Mon
Severe T-storm Watch
Tonight
Low: 57 °F
Severe
Thunderstorms
then Slight
Chance
T-storms
Tuesday
High: 84 °F
Slight Chance
T-storms
Tuesday Night
Low: 56 °F
Mostly Clear
Wednesday
High: 90 °F
Hot
Wednesday Night
Low: 59 °F
Partly Cloudy
Thursday
High: 85 °F
Mostly Sunny
then Slight
Chance
T-storms
Thursday Night
Low: 54 °F
Showers
Likely
Friday
High: 76 °F
Chance
Showers then
Chance
T-storms

Detailed Forecast

Tonight

Showers likely and possibly a thunderstorm before 9pm, then a chance of showers and thunderstorms, mainly between 9pm and midnight. Some of the storms could be severe. Cloudy, then gradually becoming partly cloudy, with a low around 57. South wind 5 to 10 mph becoming north northeast in the evening. Chance of precipitation is 60%.

Tuesday

A 20 percent chance of showers and thunderstorms before 3pm. Mostly sunny, with a high near 84. Light and variable wind becoming west northwest 5 to 10 mph in the morning.

Tuesday Night

Mostly clear, with a low around 56. Northwest wind 5 to 10 mph becoming light and variable in the evening.

Wednesday

Sunny and hot, with a high near 90. Calm wind becoming southwest around 5 mph in the afternoon.

Wednesday Night

Partly cloudy, with a low around 59. West northwest wind around 6 mph becoming light and variable after midnight.

Thursday

A 20 percent chance of showers and thunderstorms after noon. Partly sunny, with a high near 85. North northeast wind 3 to 7 mph.

Thursday Night

Showers likely and possibly a thunderstorm before midnight, then a chance of showers and thunderstorms after midnight. Mostly cloudy, with a low around 54. North northwest wind 5 to 9 mph becoming west after midnight. Chance of precipitation is 70%.

Friday

A chance of showers, with thunderstorms also possible after noon. Partly sunny, with a high near 76. West northwest wind 5 to 11 mph. Chance of precipitation is 40%.

Friday Night

A 20 percent chance of showers and thunderstorms before midnight. Partly cloudy, with a low around 51. Northwest wind 5 to 10 mph becoming light west.

Saturday

Mostly sunny, with a high near 81. West southwest wind 6 to 9 mph.

Saturday Night

Partly cloudy, with a low around 53. Northwest wind 5 to 8 mph becoming calm in the evening.

Sunday

Mostly sunny, with a high near 83. Light and variable wind becoming north northwest 5 to 8 mph in the morning.

Sunday Night

Mostly cloudy, with a low around 54. North wind 5 to 9 mph becoming calm after midnight.

Monday

Mostly sunny, with a high near 81. Calm wind becoming north northwest 5 to 7 mph in the morning.