Forecast Details for Long Valley, SD

Recent Locations: Olean, NY Delta, IA Long Valley, SD

Tonight: A slight chance of rain between midnight and 2am, then a slight chance of snow after 2am. Mostly cloudy, with a low around 31. East wind 9 to 13 mph, with gusts as high as 21 mph. Chance of precipitation is 20%.

Monday: A slight chance of snow before 1pm, then a slight chance of rain between 1pm and 5pm, then a slight chance of snow after 5pm. Mostly cloudy, with a high near 43. East wind 11 to 18 mph, with gusts as high as 25 mph. Chance of precipitation is 20%.

Monday Night: A 20 percent chance of snow after midnight. Cloudy, with a low around 27. Wind chill values as low as 14. Breezy, with a southeast wind 17 to 20 mph, with gusts as high as 28 mph.

Tuesday: Mostly sunny, with a high near 61. Wind chill values as low as 15 early. Breezy, with a south wind 21 to 26 mph, with gusts as high as 38 mph.

Tuesday Night: Partly cloudy, with a low around 42. Breezy, with a south wind 20 to 24 mph becoming northwest after midnight. Winds could gust as high as 36 mph.

Wednesday: Mostly sunny, with a high near 59. Breezy, with a northwest wind 20 to 22 mph, with gusts as high as 31 mph.

Wednesday Night: A slight chance of rain showers before 3am, then a slight chance of snow showers. Partly cloudy, with a low around 30. Blustery, with a northwest wind 20 to 25 mph decreasing to 11 to 16 mph after midnight. Winds could gust as high as 30 mph. Chance of precipitation is 20%.

Thursday: A slight chance of snow showers before noon. Mostly sunny, with a high near 54. Northwest wind 11 to 18 mph becoming northeast in the afternoon. Winds could gust as high as 23 mph.

Thursday Night: A chance of showers. Partly cloudy, with a low around 35.

Friday: A chance of showers. Partly sunny, with a high near 59. Breezy.

Friday Night: A chance of showers. Mostly cloudy, with a low around 42. Breezy.

Saturday: A chance of showers. Partly sunny, with a high near 72. Breezy.

Saturday Night: A chance of showers. Mostly cloudy, with a low around 48.

Sunday: A chance of showers. Partly sunny, with a high near 71.

Want more detail? Get the Complete 7 Day and Night Detailed Forecast!

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).

National Weather Forecast--Current

The Current National Weather Forecast and National Weather Map are shown below.

National Weather Forecast for Tomorrow

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

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.

Weather Topic: What are Cirrostratus Clouds?

Home - Education - Cloud Types - Cirrostratus Clouds

Next Topic: Cirrus Clouds

Cirrostratus clouds are high, thin clouds that form above 20,000 feet and are made mostly of ice crystals. They sometimes look like giant feathers, horse tails, or curls of hair in the sky. These clouds are pushed by the jet stream and can move at high speeds reaching 100 mph.

What do they indicate?
They indicate that a precipitation is likely within 24 hours.

Next Topic: Cirrus Clouds

Weather Topic: What is Condensation?

Home - Education - Precipitation - Condensation

Next Topic: Contrails

Condensation is the process which creates clouds, and therefore it is a crucial process in the water cycle. Condensation is the change of matter from a state of gas into a state of liquid, and it happens because water molecules release heat into the atmosphere and become organized into a more closely packed structure, what we might see as water droplets.

Water is always present in the air around us as a vapor, but it's too small for us to see. When water undergoes the process of condensation it becomes organized into visible water droplets. You've probably seen condensation happen before on the surface of a cold drink!

Next Topic: Contrails