Severe Thunderstorms and Flooding from the Southern Plains to the Great Lakes; Record Heat in the East

Widely scattered severe thunderstorms may produce damaging winds, hail, and flash flooding from the southern Plains into the lower Great Lakes. Elevated to locally critical fire weather conditions will persist across portions of the Southwest and Southern High Plains due to gusty winds and dry conditions. An early-season heatwave will challenge temperature records across the eastern U.S.. Read More >

Hazardous Weather Conditions

Frost Advisory in effect from May 20, 12:00 AM MDT until May 20, 08:00 AM MDT

Current conditions at

Rapid City, Rapid City Regional Airport (KRAP)

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

Fair

57°F

14°C

Humidity	36%
Wind Speed	Calm
Barometer	30.17 in (1022.2 mb)
Dewpoint	30°F (-1°C)
Visibility	10.00 mi
Last update	19 May 3:52 pm MDT

More Information:

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

Extended Forecast for

7 Miles N New Underwood SD

Frost Advisory May 20, 12:00am until May 20, 08:00am

Click here for hazard details and duration

Frost Advisory

Tonight
Low: 34 °F
Mostly Clear
then Areas
Frost
Wednesday
High: 68 °F
Breezy. Sunny
then Chance
Showers
Wednesday Night
Low: 41 °F
Mostly Cloudy
and Breezy
then Mostly
Clear
Thursday
High: 72 °F
Mostly Sunny
then Chance
Showers and
Breezy
Thursday Night
Low: 42 °F
Showers
Friday
High: 66 °F
Chance
Showers then
Slight Chance
Showers
Friday Night
Low: 41 °F
Partly Cloudy
Saturday
High: 76 °F
Mostly Sunny
Saturday Night
Low: 45 °F
Mostly Clear

Detailed Forecast

Tonight

Areas of frost between 2am and 4am. Otherwise, mostly clear, with a low around 34. East wind 5 to 9 mph becoming south after midnight. Winds could gust as high as 17 mph.

Wednesday

A 30 percent chance of showers and thunderstorms after 3pm. Mostly sunny, with a high near 68. Breezy, with a south wind 10 to 15 mph increasing to 20 to 25 mph in the afternoon. Winds could gust as high as 36 mph.

Wednesday Night

Mostly cloudy, then gradually becoming mostly clear, with a low around 41. Breezy, with a south wind 13 to 22 mph, with gusts as high as 36 mph.

Thursday

A chance of showers between noon and 3pm, then a chance of showers and thunderstorms after 3pm. Partly sunny, with a high near 72. Breezy, with a south wind 13 to 20 mph becoming east in the afternoon. Winds could gust as high as 31 mph. Chance of precipitation is 40%.

Thursday Night

Showers and possibly a thunderstorm. Low around 42. East wind 13 to 18 mph becoming west in the evening. Winds could gust as high as 30 mph. Chance of precipitation is 90%.

Friday

A 50 percent chance of showers, mainly before noon. Partly sunny, with a high near 66. North wind 14 to 18 mph, with gusts as high as 30 mph.

Friday Night

Partly cloudy, with a low around 41.

Saturday

Mostly sunny, with a high near 76.

Saturday Night

Mostly clear, with a low around 45.

Sunday

Sunny, with a high near 86.

Sunday Night

Mostly clear, with a low around 51.