Forecast Details for Saint Johns, MI

Recent Locations: Ronan, MT Colfax, CA Saint Johns, MI

Current Alerts for Saint Johns, MI: Wind Advisory

Tonight: Showers and possibly a thunderstorm, mainly before 5am, then a chance of showers and thunderstorms after 5am. Low around 54. Breezy, with a south wind 20 to 23 mph, with gusts as high as 38 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.

Tuesday: A 30 percent chance of showers before 8am. Cloudy, then gradually becoming mostly sunny, with a steady temperature around 57. West wind around 18 mph, with gusts as high as 31 mph.

Tuesday Night: A 20 percent chance of showers after 2am. Mostly cloudy, with a low around 45. West wind 5 to 9 mph becoming light west northwest after midnight. Winds could gust as high as 18 mph.

Wednesday: A 30 percent chance of showers, mainly between 8am and 2pm. Mostly cloudy, with a high near 55. North wind 7 to 11 mph, with gusts as high as 21 mph.

Wednesday Night: A 10 percent chance of showers before 8pm. Partly cloudy, with a low around 34. North northwest wind 6 to 10 mph, with gusts as high as 18 mph.

Thursday: Mostly sunny, with a high near 53.

Thursday Night: Partly cloudy, with a low around 32.

Friday: Mostly sunny, with a high near 51.

Friday Night: Partly cloudy, with a low around 30.

Saturday: Mostly sunny, with a high near 53.

Saturday Night: Partly cloudy, with a low around 35.

Sunday: Mostly sunny, with a high near 60.

Sunday Night: Mostly cloudy, with a low around 43.

Monday: A chance of showers. Partly sunny, with a high near 62.

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 Mammatus Clouds?

Home - Education - Cloud Types - Mammatus Clouds

Mammatus Clouds Next Topic: Nimbostratus Clouds

A mammatus cloud is a cloud with a unique feature which resembles a web of pouches hanging along the base of the cloud.

In the United States, mammatus clouds tend to form in the warmer months, commonly in the Midwest and eastern regions.

While they usually form at the bottom of a cumulonimbis cloud, they can also form under altostratus, altocumulus, stratocumulus, and cirrus clouds. Mammatus clouds warn that severe weather is close.

Next Topic: Nimbostratus Clouds

Weather Topic: What is Precipitation?

Home - Education - 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