Forecast Details for Harvey, IL

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Current Alerts for Harvey, IL: Flood Warning
Today: Mostly cloudy, with a high near 48. West northwest wind 10 to 15 mph becoming north northeast in the afternoon. Winds could gust as high as 20 mph.
Tonight: Mostly cloudy, with a low around 34. North wind 5 to 10 mph, with gusts as high as 15 mph.
Tuesday: Cloudy, with a high near 42. North northeast wind around 10 mph, with gusts as high as 15 mph.
Tuesday Night: Mostly cloudy, with a low around 34. North wind 5 to 10 mph becoming light after midnight. Winds could gust as high as 15 mph.
Wednesday: Mostly sunny, with a high near 49. Calm wind becoming northeast around 5 mph.
Wednesday Night: Partly cloudy, with a low around 36.
Thursday: Partly sunny, with a high near 57.
Thursday Night: A slight chance of rain. Mostly cloudy, with a low around 43.
Friday: A chance of rain, mainly after 1pm. Partly sunny, with a high near 60.
Friday Night: A chance of rain. Mostly cloudy, with a low around 41.
Saturday: A chance of rain. Mostly sunny, with a high near 55.
Saturday Night: A chance of rain. Mostly cloudy, with a low around 39.
Sunday: A slight chance of rain. Partly sunny, with a high near 55.

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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

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 is Snow?

Home - Education - Precipitation - Snow

Snow Next Topic: Stratocumulus Clouds

Snow is precipitation taking the form of ice crystals. Each ice crystal, or snowflake, has unique characteristics, but all of them grow in a hexagonal structure. Snowfall can last for sustained periods of time and result in significant buildup of snow on the ground.

On the earth's surface, snow starts out light and powdery, but as it begins to melt it tends to become more granular, producing small bits of ice which have the consistency of sand. After several cycles of melting and freezing, snow can become very dense and ice-like, commonly known as snow pack.

Next Topic: Stratocumulus Clouds

Weather Topic: What are Stratus Clouds?

Home - Education - Cloud Types - Stratus Clouds

Stratus Clouds Next Topic: Wall Clouds

Stratus clouds are similar to altostratus clouds, but form at a lower altitude and are identified by their fog-like appearance, lacking the distinguishing features of most clouds.

Stratus clouds are wider than most clouds, and their base has a smooth, uniform look which is lighter in color than a nimbostratus cloud. The presence of a stratus cloud indicates the possibility of minor precipitation, such as drizzle, but heavier precipitation does not typically arrive in the form of a stratus cloud.

Next Topic: Wall Clouds