Weather Alert in Washington
Hydrologic Outlook issued August 14 at 12:20PM PDT by NWS Seattle WA
AREAS AFFECTED: Clallam, WA; Grays Harbor, WA; Island, WA; Jefferson, WA; King, WA; Kitsap, WA; Lewis, WA; Mason, WA; Pierce, WA; San Juan, WA; Skagit, WA; Snohomish, WA; Thurston, WA; Whatcom, WA
DESCRIPTION: ESFSEW A frontal system will move across the area Friday into Saturday across western Washington. Through Saturday afternoon, 3-5 inches of rain are expected across the mountains, with 0.5-1.5 inches expected through the lowlands. Very dry antecedent conditions has left the area soils dry and hard. This amount of rainfall in one storm will not have much time to soak into the very dry soil, which will result in heavy surface runoff. Impacts are uncertain due to how much moisture will be able to be absorbed by the soil. Several different threats are expected with this storm, which are detailed below. *Urban and urban-like flooding will be possible in flat areas and roadways. *Some small streams and creeks may become swollen due to rapid runoff while others may remain lower if the channel bed is able to absorb the water efficiently. *Rivers will not flood, but will undergo rapid rises to unusually high levels for this time of year, some of which may reach daily record crests. This will pose a threat to those engaged in recreational activities in and along river channels. *Burn scars will have the potential to undergo impacts, but the probability is low. Impacts may include flash flooding, debris flows, rock falls, and other falling debris. *Those engaging in recreational activities in the mountains may face challenges to where high water may make forest roads and trails difficult to traverse. Please monitor the latest forecasts from the National Weather Service for additional information.
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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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