Weather Alert in Washington
Hydrologic Outlook issued March 19 at 3:35PM PDT by NWS Pendleton OR
AREAS AFFECTED: Kittitas Valley; Yakima Valley; Lower Columbia Basin of Washington; Simcoe Highlands; Upper Slopes of the Eastern Washington Cascades Crest; Lower Slopes of the Eastern Washington Cascades Crest
DESCRIPTION: ESFPDT Moderate to heavy rain is expected to continue along the Washington Cascade crest through Friday night. With temperatures remaining above freezing at night and warming into the 40s during the day, increased snowmelt is expected to continue 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 minor flood stage through Sunday evening while briefly reaching moderate flood stage on Saturday. The Naches River at Cliffdell and several locations on the Yakima River are either above action stage or are expected to reach action stage at times through this weekend. Further downstream, the Yakima River at Kiona is expected to move above action stage Friday afternoon through Tuesday and briefly rise to just above minor flood stage Sunday afternoon. Please monitor the latest river forecasts from the National Weather Service for additional information.
INSTRUCTION: N/A
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Weather Topic: What is Graupel?
Home - Education - Precipitation - Graupel
Next Topic: Hail
Graupel is a form of precipitation that is created by atmospheric conditions
which cause supercooled water droplets to contact snow crystals and freeze to
their surface.
Sometimes known as soft hail or snow pellets, graupel is delicate and easily
destroyed by touch. Whereas hail usually falls during severe weather, graupel
doesn't require such conditions to form, and can form in mild precipitation
similar to situations which produce snowfall.
Next Topic: Hail
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
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