Heavy Rainfall and Flooding in the Mid-Atlantic; Heat and Wildfire Concerns in the West

Slow moving showers and thunderstorms may result in flash flooding for portions of the mid-Atlantic region through tonight. Meanwhile, excessive heat will continue to build across the West through Tuesday. Heat Advisories and Extreme Heat Warnings are in effect. Fire Weather concerns continue for the West with dry and breezy conditions. Watching the tropics across the Southeast. Read More >

Hazardous Weather Conditions

Hazardous Weather Outlook

Current conditions at

Spearfish / Clyde Ice (KSPF)

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

Partly Cloudy

66°F

19°C

Humidity	73%
Wind Speed	SW 9 mph
Barometer	30.00 in
Dewpoint	57°F (14°C)
Visibility	10.00 mi
Last update	15 Jul 2:15 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
Slight Chance
T-storms
Tuesday
High: 64 °F
Slight Chance
T-storms then
Showers
Likely
Tuesday Night
Low: 47 °F
Showers and
Patchy Fog
Wednesday
High: 52 °F
Showers and
Areas Fog
Wednesday Night
Low: 46 °F
Chance
Showers
Thursday
High: 74 °F
Mostly Sunny
Thursday Night
Low: 56 °F
Slight Chance
T-storms
Friday
High: 78 °F
Sunny
Friday Night
Low: 55 °F
Slight Chance
T-storms then
Chance
Showers

Detailed Forecast

Overnight

A 20 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 58. Calm wind becoming southwest around 5 mph.

Tuesday

Showers and thunderstorms likely before 3pm, then showers likely and possibly a thunderstorm between 3pm and 5pm, then a chance of showers and thunderstorms after 5pm. Mostly cloudy, with a high near 64. West wind 5 to 10 mph becoming east in the afternoon. Winds could gust as high as 20 mph. Chance of precipitation is 70%.

Tuesday Night

Showers and thunderstorms before 4am, then showers and possibly a thunderstorm, mainly after 4am. Patchy fog after 10pm. Low around 47. East wind around 5 mph, with gusts as high as 15 mph. Chance of precipitation is 100%.

Wednesday

Showers and possibly a thunderstorm. Areas of fog before 10am. High near 52. Southeast wind around 5 mph becoming northeast in the afternoon. Winds could gust as high as 15 mph. Chance of precipitation is 90%.

Wednesday Night

A chance of showers and thunderstorms. Mostly cloudy, with a low around 46. Southeast wind around 5 mph. Chance of precipitation is 40%.

Thursday

Mostly sunny, with a high near 74. Southeast wind 5 to 10 mph, with gusts as high as 20 mph.

Thursday Night

A slight chance of showers and thunderstorms. Partly cloudy, with a low around 56. Southeast wind 5 to 10 mph becoming west after midnight. Winds could gust as high as 20 mph. Chance of precipitation is 20%.

Friday

Sunny, with a high near 78. Calm wind becoming north around 5 mph in the morning. Winds could gust as high as 15 mph.

Friday Night

A chance of showers and thunderstorms, mainly after midnight. Partly cloudy, with a low around 55.

Saturday

A slight chance of showers, then a chance of showers and thunderstorms after noon. Partly sunny, with a high near 77.

Saturday Night

A chance of showers and thunderstorms. Partly cloudy, with a low around 58.

Sunday

A slight chance of showers and thunderstorms. Mostly sunny, with a high near 82.

Sunday Night

A slight chance of showers and thunderstorms. Mostly clear, with a low around 58.