Sinlaku Continues to Impact the Marianas; Severe Weather from the Central US to the Northeast; Late-Season Snow in the Northwest

Sinlaku continues to bring destructive winds, widespread heavy rain/flooding, and storm surge to the Marianas. Showers and severe thunderstorms are expected from the Northeast to the Mid-Mississippi Valley and to the Central/Southern Plains through Thursday. A front will produce late-season snowfall over the Cascades and Northern Rockies and coastal rain over the Northwest Coast through Thursday. Read More >

Hazardous Weather Conditions

Current conditions at

Rapid City, Rapid City Regional Airport (KRAP)

Lat: 44.05°NLon: 103.05°WElev: 3202ft.

Fair

66°F

19°C

Humidity 32%
Wind Speed NE 12 mph
Barometer 29.71 in (1005.8 mb)
Dewpoint 35°F (2°C)
Visibility 10.00 mi
Last update 15 Apr 11:52 am MDT
Extended Forecast for

2 Miles ESE New Underwood SD

  • This Afternoon

    This Afternoon: Sunny, with a high near 76. Northeast wind 6 to 13 mph becoming south. Winds could gust as high as 22 mph.

    High: 76 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 48. Southwest wind 10 to 14 mph, with gusts as high as 23 mph.

    Low: 48 °F

    Mostly Clear

  • Thursday

    Thursday: A 30 percent chance of showers after noon.  Partly sunny, with a high near 75. Breezy, with a south wind 15 to 25 mph becoming north in the afternoon. Winds could gust as high as 36 mph.

    High: 75 °F

    Breezy.
    Partly Sunny
    then Chance
    Showers

  • Thursday Night

    Thursday Night: Rain showers before 11pm, then rain and snow showers between 11pm and 1am, then snow showers likely after 1am.  Low around 31. Wind chill values as low as 17. Windy, with a northwest wind 25 to 34 mph, with gusts as high as 47 mph.  Chance of precipitation is 90%. New snow accumulation of less than a half inch possible.

    Low: 31 °F

    Rain/Snow and
    Windy

  • Friday

    Friday: A 40 percent chance of snow showers.  Mostly cloudy, with a high near 46. Windy, with a northwest wind 26 to 31 mph, with gusts as high as 47 mph.  New snow accumulation of less than a half inch possible.

    High: 46 °F

    Chance Snow
    Showers and
    Windy

  • Friday Night

    Friday Night: Mostly cloudy, then gradually becoming mostly clear, with a low around 23. Blustery, with a northwest wind 23 to 28 mph decreasing to 9 to 14 mph after midnight. Winds could gust as high as 41 mph.

    Low: 23 °F

    Mostly Cloudy
    and Blustery
    then Partly
    Cloudy

  • Saturday

    Saturday: A slight chance of rain and snow showers between noon and 1pm, then a slight chance of rain showers after 1pm.  Mostly sunny, with a high near 54. Breezy, with a northwest wind 9 to 14 mph increasing to 21 to 26 mph in the afternoon. Winds could gust as high as 39 mph.  Chance of precipitation is 20%.

    High: 54 °F

    Breezy.
    Mostly Sunny
    then Slight
    Chance
    Rain/Snow

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 26. Blustery, with a northwest wind 17 to 22 mph becoming southwest 5 to 10 mph in the evening. Winds could gust as high as 34 mph.

    Low: 26 °F

    Partly Cloudy
    and Blustery
    then Mostly
    Clear

  • Sunday

    Sunday: Sunny, with a high near 68.

    High: 68 °F

    Sunny

Detailed Forecast

This Afternoon
Sunny, with a high near 76. Northeast wind 6 to 13 mph becoming south. Winds could gust as high as 22 mph.
Tonight
Mostly clear, with a low around 48. Southwest wind 10 to 14 mph, with gusts as high as 23 mph.
Thursday
A 30 percent chance of showers after noon. Partly sunny, with a high near 75. Breezy, with a south wind 15 to 25 mph becoming north in the afternoon. Winds could gust as high as 36 mph.
Thursday Night
Rain showers before 11pm, then rain and snow showers between 11pm and 1am, then snow showers likely after 1am. Low around 31. Wind chill values as low as 17. Windy, with a northwest wind 25 to 34 mph, with gusts as high as 47 mph. Chance of precipitation is 90%. New snow accumulation of less than a half inch possible.
Friday
A 40 percent chance of snow showers. Mostly cloudy, with a high near 46. Windy, with a northwest wind 26 to 31 mph, with gusts as high as 47 mph. New snow accumulation of less than a half inch possible.
Friday Night
Mostly cloudy, then gradually becoming mostly clear, with a low around 23. Blustery, with a northwest wind 23 to 28 mph decreasing to 9 to 14 mph after midnight. Winds could gust as high as 41 mph.
Saturday
A slight chance of rain and snow showers between noon and 1pm, then a slight chance of rain showers after 1pm. Mostly sunny, with a high near 54. Breezy, with a northwest wind 9 to 14 mph increasing to 21 to 26 mph in the afternoon. Winds could gust as high as 39 mph. Chance of precipitation is 20%.
Saturday Night
Mostly clear, with a low around 26. Blustery, with a northwest wind 17 to 22 mph becoming southwest 5 to 10 mph in the evening. Winds could gust as high as 34 mph.
Sunday
Sunny, with a high near 68.
Sunday Night
Mostly clear, with a low around 35.
Monday
Sunny, with a high near 79.
Monday Night
Partly cloudy, with a low around 42.
Tuesday
Sunny, with a high near 80.
Basemap Options
Click map to change the forecast location
Loading map...

ABOUT THIS FORECAST

 
Point Forecast:
2 Miles ESE New Underwood SD
 44.09°N 102.79°W (Elev. 2894 ft)
11:41 am MDT Apr 15, 2026
12pm MDT Apr 15, 2026-6pm MDT Apr 21, 2026
 
Get as KML Get as XML

Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database