Forecast Details for Guaynabo, 061

Recent Locations: Helix, OR Powell Butte, OR Guaynabo, 061

Overnight: Scattered showers after 3am. Clear early, then becoming mostly cloudy, with a low around 71. Southeast wind around 8 mph. Chance of precipitation is 50%.

Monday: Scattered showers, then showers likely and possibly a thunderstorm after noon. Mostly cloudy, with a high near 86. Southeast wind 8 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.

Monday Night: Scattered showers, mainly after 9pm. Mostly cloudy, with a low around 71. Southeast wind around 8 mph. Chance of precipitation is 50%.

Tuesday: Isolated showers, then showers likely and possibly a thunderstorm after noon. Increasing clouds, with a high near 86. Southeast wind 9 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 70%.

Tuesday Night: Scattered showers, mainly after midnight. Partly cloudy, with a low around 73. East southeast wind around 7 mph. Chance of precipitation is 40%.

Wednesday: Scattered showers and thunderstorms, then showers likely and possibly a thunderstorm after noon. Mostly cloudy, with a high near 87. East southeast wind 9 to 14 mph. Chance of precipitation is 70%.

Wednesday Night: Scattered showers. Partly cloudy, with a low around 73. East southeast wind 6 to 8 mph. Chance of precipitation is 30%.

Thursday: Scattered showers. Partly sunny, with a high near 87. East wind 8 to 14 mph. Chance of precipitation is 50%.

Thursday Night: Partly cloudy, with a low around 73. East wind around 8 mph.

Friday: Scattered showers. Partly sunny, with a high near 86. Chance of precipitation is 50%.

Friday Night: Scattered showers. Mostly cloudy, with a low around 72. Chance of precipitation is 40%.

Saturday: Scattered showers. Mostly sunny, with a high near 86. Chance of precipitation is 30%.

Saturday Night: Partly cloudy, with a low around 72.

Sunday: Scattered showers. Mostly sunny, with a high near 85. Chance of precipitation is 40%.

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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