Weather Alert in Washington
Hydrologic Outlook issued March 18 at 2:55PM PDT by NWS Pendleton OR
AREAS AFFECTED: Kittitas Valley; Upper Slopes of the Eastern Washington Cascades Crest; Lower Slopes of the Eastern Washington Cascades Crest
DESCRIPTION: ESFPDT Moderate to heavy rain is expected this week along the Washington Cascade crest. With temperatures remaining above freezing at night and warming into the 40s during the day, increased snowmelt is expected as well. The rain and snow melt will increase water levels in rivers and streams flowing off the Cascades. The Naches River at Naches is expected to remain above action stage then rise above minor flood stage Friday afternoon through Sunday morning. The Naches River at Cliffdell and the Yakima River at Umtanum are expected to remain above action stage through at least Sunday but are not expected to reach minor flood stage. The Yakima River at Easton is expected to rise just above action stage Friday night and Saturday morning. Please monitor the latest river forecasts from the National Weather Service for additional information.
INSTRUCTION: N/A
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Weather Topic: What are Hole Punch Clouds?
Home - Education - Cloud Types - Hole Punch Clouds
Next Topic: Mammatus Clouds
A hole punch cloud is an unusual occurrence when a disk-shaped
hole appears in a cirrostratus, cirrocumulus, or altocumulus cloud.
When part of the cloud forms ice crystals, water droplets in the surrounding area
of the cloud evaporate. The effect of this process produces a large elliptical
gap in the cloud. The hole punch cloud formation is rare, but it is not specific
to any geographic area.
Other names which have been used to describe this phenomena include fallstreak hole,
skypunch, and cloud hole.
Next Topic: Mammatus Clouds
Weather Topic: What are Nimbostratus Clouds?
Home - Education - Cloud Types - Nimbostratus Clouds
Next Topic: Precipitation
A nimbostratus cloud is similar to a stratus cloud in its formless,
smooth appearance. However, a nimbostratus cloud is darker than a stratus cloud,
because it is thicker.
Unlike a stratus cloud, a nimbostratus cloud typically brings with it the threat
of moderate to heavy precipitation. In some cases, the precipitation may evaporate
before reaching the ground, a phenomenon known as virga.
Next Topic: Precipitation
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