Forecast Details for Merrillville, IN

Recent Locations: Merrillville, IN  
Today: Showers likely, mainly after 4pm. Increasing clouds, with a high near 64. Southeast wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.
Tonight: Showers likely and possibly a thunderstorm before 4am, then a chance of showers and thunderstorms after 4am. Cloudy, with a low around 59. Southeast wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Saturday: A chance of showers and thunderstorms before 1pm, then a slight chance of showers and thunderstorms after 4pm. Mostly cloudy, with a high near 78. Breezy, with a south southwest wind 15 to 20 mph, with gusts as high as 35 mph. Chance of precipitation is 30%.
Saturday Night: A 40 percent chance of showers and thunderstorms, mainly after 1am. Mostly cloudy, with a low around 64. Breezy, with a south southwest wind 15 to 20 mph, with gusts as high as 30 mph.
Sunday: A chance of showers and thunderstorms before 10am, then a chance of showers between 10am and 1pm, then a slight chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 80. Breezy, with a south southwest wind 15 to 20 mph, with gusts as high as 35 mph. Chance of precipitation is 40%.
Sunday Night: A chance of showers and thunderstorms before 1am, then showers likely and possibly a thunderstorm between 1am and 4am, then showers likely after 4am. Mostly cloudy, with a low around 62. Breezy. Chance of precipitation is 60%.
Monday: Showers likely, with thunderstorms also possible after 7am. Mostly cloudy, with a high near 74. Breezy. Chance of precipitation is 70%.
Monday Night: A chance of showers and thunderstorms. Mostly cloudy, with a low around 54.
Tuesday: Mostly sunny, with a high near 76.
Tuesday Night: Partly cloudy, with a low around 57.
Wednesday: A chance of showers and thunderstorms. Mostly sunny, with a high near 76.
Wednesday Night: A chance of showers and thunderstorms. Partly cloudy, with a low around 54.
Thursday: A chance of showers and thunderstorms. Mostly sunny, with a high near 67.

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

Want to Receive our Free Daily Forecast Emails in your inbox by 5 a.m.?
There are no ads! Learn More
We respect your privacy and will not share or sell your email with anyone.

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

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

Today's 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

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

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