Weather Alerts for South Dakota

Recent Locations: Wounded Knee, SD  

1. Flood Warning for: Spink

2. Flood Warning for: Brown

3. Flood Warning for: Brown; Spink

4. Flood Warning for: Minnehaha; Moody

5. Flood Warning for: Bon Homme

6. Flood Warning for: Brookings; Moody

7. Flood Warning for: Brookings; Hamlin

8. Flood Warning for: Minnehaha

9. Flood Warning for: Lincoln

10. Flood Warning for: Hutchinson; Yankton

11. Flood Warning for: Davison; Hanson

12. Flood Warning for: Bon Homme; Charles Mix

13. Flood Warning for: Moody

14. Flood Warning for: Brookings

15. Flood Warning for: Charles Mix

16. Flood Warning for: Beadle

17. Flood Warning for: Union

18. Flood Warning for: Union

19. Flood Warning for: Minnehaha

20. Flood Warning for: Bon Homme

21. Flood Warning for: Sanborn

22. Flood Warning for: Union

23. Flood Warning for: Minnehaha; Moody

24. Flood Warning for: Yankton

25. Flood Warning for: Pennington

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Current U.S. National Radar--Current

The Current National Weather Radar is shown below with a UTC Time (subtract 5 hours from UTC to get Eastern Time).

Current U.S. National Radar

National Weather Forecast--Current

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Todays National Weather Map

National Weather Forecast for Tomorrow

Tomorrow National Weather Forecast and Tomorrow National Weather Map are show below.

Tomorrows National Weather Map

North America Water Vapor (Moisture)

This map shows recent moisture content over North America. Bright and colored areas show high moisture (ie, clouds ); brown indicates very little moisture present; black indicates no moisture.

North American Water Vapor Map

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Weather Topic: What is Precipitation?

Home - Education - Precipitation - Precipitation

precipitation Next Topic: Rain

Precipitation can refer to many different forms of water that may fall from clouds. Precipitation occurs after a cloud has become saturated to the point where its water particles are more dense than the air below the cloud.

In most cases, precipitation will reach the ground, but it is not uncommon for precipitation to evaporate before it reaches the earth's surface. When precipitation evaporates before it contacts the ground it is called Virga. Graupel, hail, sleet, rain, drizzle, and snow are forms of precipitation, but fog and mist are not considered precipitation because the water vapor which constitutes them isn't dense enough to fall to the ground.

Next Topic: Rain

Weather Topic: What is Sleet?

Home - Education - Precipitation - Sleet

sleet Next Topic: Snow

Sleet is a form of precipitation in which small ice pellets are the primary components. These ice pellets are smaller and more translucent than hailstones, and harder than graupel. Sleet is caused by specific atmospheric conditions and therefore typically doesn't last for extended periods of time.

The condition which leads to sleet formation requires a warmer body of air to be wedged in between two sub-freezing bodies of air. When snow falls through a warmer layer of air it melts, and as it falls through the next sub-freezing body of air it freezes again, forming ice pellets known as sleet. In some cases, water droplets don't have time to freeze before reaching the surface and the result is freezing rain.

Next Topic: Snow