Weather Alert in Oregon
Special Weather Statement issued September 6 at 4:14PM PDT by NWS Pendleton OR
AREAS AFFECTED: East Slopes of the Oregon Cascades; North Central Oregon; Central Oregon
DESCRIPTION: At 412 PM PDT, Doppler radar was tracking a cluster of strong thunderstorms along the crest of the Cascades that are all moving slowly north at 15 mph. They are near Sisters, or 12 miles west of Redmond extending northward past Mount Jefferson and west of Warm Springs. HAZARD...Wind gusts up to 40 mph and penny size hail. SOURCE...Radar indicated. IMPACT...Gusty winds could knock down tree limbs and blow around unsecured objects. Minor hail damage to vegetation is possible. Locations impacted include... Redmond, Madras, Sisters, Culver, Metolius, Warm Springs Reservation, Wamic, Warm Springs, Tygh Valley, Wapinitia, Pine Grove, Camp Sherman, Simnasho, and Black Butte Ranch. This includes the following highways in Oregon... U.S. Highway 20 east of Albany between mile markers 82 and 89. U.S. Highway 26 east of Portland between mile markers 66 and 71.
INSTRUCTION: If outdoors, consider seeking shelter inside a building.
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Weather Topic: What are Fractus Clouds?
Home - Education - Cloud Types - Fractus Clouds
Next Topic: Freezing Rain
A fractus cloud (scud) is a fragmented, tattered cloud which has
likely been sheared off of another cloud. They are accessory clouds, meaning they
develop from parent clouds, and are named in a way which describes the original
cloud which contained them.
Fractus clouds which have originated from cumulus clouds are referred to as
cumulus fractus, while fractus clouds which have originated from stratus clouds
are referred to as stratus fractus. Under certain conditions a fractus cloud might
merge with another cloud, or develop into a cumulus cloud, but usually a
fractus cloud seen by itself will dissipate rapidly.
They are often observed on the leading and trailing edges of storm clouds,
and are a display of wind activity.
Next Topic: Freezing Rain
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
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