Heat Across the Center of the Nation; Severe Thunderstorms Across the Great Lakes and Ohio Valley

Heat expands across the Desert Southwest, Plains, Mississippi Valley and Midwest into Monday. Fire weather concerns continue for portions of the Intermountain West. Active monsoonal moisture fuels thunderstorms over the Southwest with possible flash flooding. Tropical cyclone Fausto in the Pacific, should weaken as it approaches Hawaii; Dangerous surf, swells and rip currents are expected. Read More >

Current conditions at

Spearfish / Clyde Ice (KSPF)

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

Fair

100°F

38°C

Humidity	18%
Wind Speed	E 8 G 18 mph
Barometer	29.98 in
Dewpoint	50°F (10°C)
Visibility	10.00 mi
Heat Index	97°F (36°C)
Last update	26 Jul 4:35 pm MDT

More Information:

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

Extended Forecast for

Lead SD

This Afternoon
High: 95 °F
Slight Chance
T-storms
Tonight
Low: 70 °F
Chance
T-storms
Monday
High: 90 °F
Chance
T-storms
Monday Night
Low: 66 °F
Scattered
T-storms
Tuesday
High: 88 °F
Mostly Sunny
then Chance
T-storms
Tuesday Night
Low: 66 °F
Chance
T-storms then
Partly Cloudy
Wednesday
High: 89 °F
Mostly Sunny
then T-storms
Likely
Wednesday Night
Low: 64 °F
Showers
Likely then
Slight Chance
T-storms
Thursday
High: 85 °F
Mostly Sunny
then Chance
T-storms

Detailed Forecast

This Afternoon

A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 95. Light and variable wind. Winds could gust as high as 17 mph.

Tonight

A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 70. Light and variable wind.

Monday

A 40 percent chance of showers and thunderstorms, mainly after noon. Partly sunny, with a high near 90. Calm wind becoming south around 5 mph. Winds could gust as high as 18 mph.

Monday Night

Scattered showers and thunderstorms, mainly before midnight. Areas of smoke between 9pm and midnight. Mostly cloudy, with a low around 66. South wind around 5 mph becoming calm in the evening. Winds could gust as high as 18 mph. Chance of precipitation is 40%.

Tuesday

A 40 percent chance of showers and thunderstorms after noon. Mostly sunny, with a high near 88. Calm wind becoming east around 5 mph in the afternoon. Winds could gust as high as 16 mph.

Tuesday Night

A 30 percent chance of showers and thunderstorms before midnight. Partly cloudy, with a low around 66. Southeast wind around 5 mph becoming calm in the evening. Winds could gust as high as 17 mph.

Wednesday

Showers and thunderstorms likely after noon. Partly sunny, with a high near 89. Chance of precipitation is 60%.

Wednesday Night

Showers likely and possibly a thunderstorm before midnight, then a slight chance of showers and thunderstorms after midnight. Mostly cloudy, with a low around 64.

Thursday

A chance of showers and thunderstorms after noon. Sunny, with a high near 85.

Thursday Night

A slight chance of showers and thunderstorms before midnight. Mostly clear, with a low around 62.

Friday

A chance of showers and thunderstorms. Sunny, with a high near 87.

Friday Night

A chance of showers and thunderstorms. Partly cloudy, with a low around 62.

Saturday

Sunny, with a high near 89.

Saturday Night

Mostly clear, with a low around 67.