Air Quality Concerns; Fire Weather; Extreme Heat; 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. Heavy rainfall and flash flooding possible for the Southeast through Monday. For Hawaii, gusty trade winds a drier weather could result in any fires that start to spread rapidly. Read More >

Hazardous Weather Conditions

Hazardous Weather Outlook

Current conditions at

Spearfish / Clyde Ice (KSPF)

Lat: 44.48°NLon: 103.78°WElev: 3898ft.

Fair

64°F

18°C

Humidity	83%
Wind Speed	SW 5 mph
Barometer	30.10 in
Dewpoint	59°F (15°C)
Visibility	10.00 mi
Last update	4 Aug 12:35 am MDT

More Information:

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

Extended Forecast for

Lead SD

Overnight
Low: 58 °F
Scattered
T-storms
Monday
High: 80 °F
Sunny then
Chance
T-storms
Monday Night
Low: 59 °F
Partly Cloudy
Tuesday
High: 82 °F
Mostly Sunny
then Slight
Chance
T-storms
Tuesday Night
Low: 57 °F
Mostly Clear
Wednesday
High: 83 °F
Sunny
Wednesday Night
Low: 61 °F
Mostly Clear
Thursday
High: 87 °F
Sunny
Thursday Night
Low: 59 °F
Slight Chance
T-storms then
Partly Cloudy

Detailed Forecast

Overnight

Scattered showers and thunderstorms, mainly before 3am. Partly cloudy, with a low around 58. Calm wind becoming south around 5 mph. Chance of precipitation is 30%.

Monday

A 50 percent chance of showers and thunderstorms after noon. Mostly sunny, with a high near 80. Light and variable wind becoming southeast 5 to 10 mph in the morning.

Monday Night

Partly cloudy, with a low around 59. Southeast wind 5 to 10 mph becoming south after midnight. Winds could gust as high as 25 mph.

Tuesday

A 20 percent chance of showers and thunderstorms after noon. Sunny, with a high near 82. South wind around 5 mph becoming north in the afternoon. Winds could gust as high as 15 mph.

Tuesday Night

Mostly clear, with a low around 57. North wind around 5 mph becoming calm in the evening. Winds could gust as high as 15 mph.

Wednesday

Sunny, with a high near 83. Calm wind becoming east around 5 mph in the morning. Winds could gust as high as 15 mph.

Wednesday Night

Mostly clear, with a low around 61. Southeast wind around 5 mph becoming south after midnight. Winds could gust as high as 15 mph.

Thursday

Sunny, with a high near 87. South wind around 5 mph becoming northeast in the afternoon. Winds could gust as high as 15 mph.

Thursday Night

A slight chance of showers and thunderstorms before midnight. Partly cloudy, with a low around 59.

Friday

A slight chance of showers and thunderstorms after noon. Mostly sunny, with a high near 78.