Weather Alert in Oregon
High Wind Watch issued February 20 at 9:42PM PST until February 22 at 10:00PM PST by NWS Pendleton OR
AREAS AFFECTED: Foothills of the Northern Blue Mountains of Oregon
DESCRIPTION: * WHAT...Southeast winds 30 to 40 mph with gusts up to 60 mph possible. * WHERE...Foothills of the Northern Blue Mountains of Oregon. * WHEN...From Saturday evening through Sunday evening. * IMPACTS...Damaging winds could blow down trees and power lines. Widespread power outages are possible. Travel could be difficult, especially for high profile vehicles. * ADDITIONAL DETAILS...Strongest winds are expected along the slopes and base of the northern Blue Mountains, including along Interstate 84 in the vicinity of Cabbage Hill. Significantly lighter winds are forecast away from the mountains in Pendleton, Pilot Rock, and Milton-Freewater.
INSTRUCTION: Monitor the latest forecasts and warnings for updates.
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Weather Topic: What is Sleet?
Home - Education - Precipitation - 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
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