Weather Alert in Oregon
Heat Advisory issued September 1 at 2:22PM PDT until September 3 at 9:00PM PDT by NWS Portland OR
AREAS AFFECTED: West Columbia River Gorge I-84 Corridor; Upper Hood River Valley; Central Columbia River Gorge I-84 Corridor; West Columbia River Gorge - SR 14; Central Columbia River Gorge - SR 14
DESCRIPTION: * WHAT...Afternoon high temperatures in the mid to upper 90s and overnight low temperatures in the mid 60s to lower 70s expected. * WHERE...Western and Central Columbia River Gorge and the Hood River Valley. * WHEN...From noon Tuesday to 9 PM PDT Wednesday. * IMPACTS...Hot temperatures may cause heat illnesses. * ADDITIONAL DETAILS...Increasing high clouds may limit high temperatures a bit on Wednesday when compared to Tuesday. However, probabilities for high temperatures above 90 degrees on Wednesday are high, ranging from 80-90%.
INSTRUCTION: Drink plenty of fluids, stay in a cool place during the heat of the day, stay out of the sunshine, and check up on relatives and neighbors. For those without air conditioning, use fans to keep air moving. Keeps windows closed during the day and open at night, unless air quality is degraded due to wildfire smoke. Take extra precautions when outside. Wear lightweight and loose fitting clothing. Try to limit strenuous activities to early morning or evening. Take action when you see symptoms of heat exhaustion and heat stroke. Do not leave young children and pets in unattended vehicles. Car interiors will reach lethal temperatures in a matter of minutes.
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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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