Forecast Details for Portville, NY

Recent Locations: Portville, NY

Today: Partly sunny, with a high near 81. South wind 3 to 7 mph.

Tonight: A chance of showers and thunderstorms, mainly after 7pm. Mostly cloudy, with a low around 51. South wind 7 to 9 mph. Chance of precipitation is 50%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Saturday: Showers likely and possibly a thunderstorm. Cloudy, with a high near 61. Southeast wind 9 to 13 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Saturday Night: Showers likely and possibly a thunderstorm. Cloudy, with a low around 49. South wind around 16 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Sunday: A chance of showers. Mostly cloudy, with a high near 66. South wind 10 to 14 mph. Chance of precipitation is 50%. New precipitation amounts of less than a tenth of an inch possible.

Sunday Night: A slight chance of showers. Mostly cloudy, with a low around 52. South wind 5 to 8 mph becoming west after midnight. Chance of precipitation is 20%.

Monday: Partly sunny, with a high near 72. Northwest wind 6 to 9 mph.

Monday Night: Partly cloudy, with a low around 49. North wind 5 to 8 mph becoming southeast after midnight.

Tuesday: A chance of showers after 2pm. Partly sunny, with a high near 77. Chance of precipitation is 40%.

Tuesday Night: Showers likely, mainly after 8pm. Mostly cloudy, with a low around 58. Chance of precipitation is 70%.

Wednesday: Showers likely and possibly a thunderstorm. Partly sunny, with a high near 77. Chance of precipitation is 70%.

Wednesday Night: A chance of showers and thunderstorms. Mostly cloudy, with a low around 56. Chance of precipitation is 40%.

Thursday: A chance of showers. Partly sunny, with a high near 73. Chance of precipitation is 50%.

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Current U.S. National Radar--Current

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National Weather Forecast for Tomorrow

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North America Water Vapor (Moisture)

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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

Weather Topic: What are Wall Clouds?

Home - Education - Cloud Types - Wall Clouds

Wall Clouds Next Topic: Altocumulus Clouds

A wall cloud forms underneath the base of a cumulonimbus cloud, and can be a hotbed for deadly tornadoes.

Wall clouds are formed by air flowing into the cumulonimbus clouds, which can result in the wall cloud descending from the base of the cumulonimbus cloud, or rising fractus clouds which join to the base of the storm cloud as the wall cloud takes shape.

Wall clouds can be very large, and in the Northern Hemisphere they generally form at the southern edge of cumulonimbus clouds.

Next Topic: Altocumulus Clouds