Watching Hurricane Erin; Heavy Rainfall Threat for Upper Midwest; Heatrisk for Mississippi Valley

Hurricane Erin continues to track westward with its outer bands bringing heavy rainfall and gusty winds for Puerto Rico and US Virgin Islands. Life-threatening surf and rip currents are occurring and will spread across the Atlantic coasts this week. Meanwhile, heavy rainfall and possible flooding are in the forecast for upper Midwest through Monday. Heatrisk continues for the Mississippi Valley. Read More >

Hazardous Weather Conditions

Current conditions at

Watertown, Watertown Municipal Airport (KATY)

Lat: 44.9°NLon: 97.15°WElev: 1745ft.

Fair

75°F

24°C

Humidity	82%
Wind Speed	SE 8 G 20 mph
Barometer	29.92 in (1012.1 mb)
Dewpoint	69°F (21°C)
Visibility	10.00 mi
Last update	17 Aug 5:53 pm CDT

More Information:

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

Extended Forecast for

Castlewood SD

Flood Warning until August 18, 04:15pm

Click here for hazard details and duration

Flood Warning

Flood Warning until August 18, 04:15pm
NOW until 4:15pm Mon
Flood Warning
Tonight
Low: 67 °F
Chance
T-storms and
Patchy Fog
Monday
High: 83 °F
Patchy Fog
then Mostly
Sunny
Monday Night
Low: 63 °F
Partly Cloudy
Tuesday
High: 83 °F
Sunny
Tuesday Night
Low: 61 °F
Mostly Clear
Wednesday
High: 83 °F
Sunny
Wednesday Night
Low: 62 °F
Clear
Thursday
High: 85 °F
Sunny

Detailed Forecast

Tonight

A chance of showers and thunderstorms, mainly before 1am. Patchy fog after 4am. Otherwise, mostly cloudy, with a low around 67. East southeast wind 8 to 11 mph becoming west southwest after midnight. Winds could gust as high as 21 mph. Chance of precipitation is 50%.

Monday

Patchy fog before 10am. Otherwise, mostly sunny, with a high near 83. West wind 6 to 8 mph becoming north in the afternoon.

Monday Night

Partly cloudy, with a low around 63. Northeast wind 3 to 7 mph.

Tuesday

Sunny, with a high near 83. Northeast wind 3 to 7 mph.

Tuesday Night

Mostly clear, with a low around 61. Northeast wind 5 to 7 mph becoming calm after midnight.

Wednesday

Sunny, with a high near 83. Calm wind becoming southeast 5 to 8 mph in the morning.

Wednesday Night

Clear, with a low around 62. East southeast wind around 8 mph.

Thursday

Sunny, with a high near 85. South wind 9 to 13 mph, with gusts as high as 21 mph.

Thursday Night

A chance of showers and thunderstorms. Partly cloudy, with a low around 62. South wind 7 to 10 mph becoming northwest after midnight. Chance of precipitation is 40%.

Friday

A slight chance of showers before 1pm. Mostly sunny, with a high near 77. Chance of precipitation is 20%.

Friday Night

Mostly clear, with a low around 54.

Saturday

Sunny, with a high near 72.

Saturday Night

Mostly clear, with a low around 49.

Sunday

Sunny, with a high near 70.