Forecast Details for Hilo, HI

Recent Locations: Normantown, WV Clay Center, KS Hilo, HI

Tonight: Scattered showers. Cloudy, with a low around 70. Northeast wind around 5 mph becoming calm after midnight. Chance of precipitation is 40%. New precipitation amounts of less than a tenth of an inch possible.

Friday: Scattered showers, with thunderstorms also possible after noon. Some of the storms could produce heavy rainfall. Cloudy, with a high near 80. Calm wind becoming east northeast 5 to 8 mph. Chance of precipitation is 30%.

Friday Night: Scattered showers. Cloudy, with a low around 70. Calm wind becoming east southeast around 6 mph after midnight. Chance of precipitation is 40%. New precipitation amounts of less than a tenth of an inch possible.

Saturday: Scattered showers before noon. Cloudy, with a high near 79. East wind 5 to 8 mph becoming calm in the afternoon. Chance of precipitation is 30%.

Saturday Night: Scattered showers, mainly after midnight. Mostly cloudy, with a low around 69. Light and variable wind. Chance of precipitation is 40%.

Sunday: Isolated showers before noon. Mostly cloudy, with a high near 79. Light east southeast wind becoming east 5 to 9 mph in the afternoon. Chance of precipitation is 20%.

Sunday Night: Scattered showers, mainly after midnight. Mostly cloudy, with a low around 68. East southeast wind around 6 mph becoming light and variable. Chance of precipitation is 30%.

Monday: Isolated showers. Mostly cloudy, with a high near 79. East southeast wind 6 to 11 mph. Chance of precipitation is 20%.

Monday Night: Isolated showers before midnight. Mostly cloudy, with a low around 69. Southeast wind 5 to 7 mph. Chance of precipitation is 20%.

Tuesday: Scattered showers. Partly sunny, with a high near 80. East southeast wind 5 to 9 mph. Chance of precipitation is 40%.

Tuesday Night: Scattered showers. Mostly cloudy, with a low around 69. South wind 3 to 6 mph. Chance of precipitation is 30%.

Wednesday: Scattered showers. Mostly sunny, with a high near 80. Light and variable wind becoming east 5 to 8 mph. Chance of precipitation is 40%.

Wednesday Night: Occasional showers. Low around 68. Light south wind. Chance of precipitation is 80%.

Thursday: Showers likely. Mostly cloudy, with a high near 80. East wind 3 to 8 mph. Chance of precipitation is 70%.

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Current U.S. National Radar--Current

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National Weather Forecast--Current

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National Weather Forecast for Tomorrow

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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 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

Weather Topic: What are Stratocumulus Clouds?

Home - Education - Cloud Types - Stratocumulus Clouds

Next Topic: Stratus Clouds

Stratocumulus clouds are similar to altocumulus clouds in their fluffy appearance, but have a slightly darker shade due to their additional mass.

A good way to distinguish the two cloud types is to hold your hand out and measure the size of an individual cloud; if it is the size of your thumb it is generally an altocumulus cloud, if it is the size of your hand it is generally a stratocumulus cloud.

It is uncommon for stratocumulus clouds to produce precipitation, but if they do it is usually a light rain or snow.

Next Topic: Stratus Clouds