Weather Alert in Washington
Red Flag Warning issued September 3 at 4:40PM PDT until September 4 at 9:00PM PDT by NWS Pendleton OR
AREAS AFFECTED: East Washington South Central Cascade Mountains
DESCRIPTION: ...RED FLAG WARNING IN EFFECT FOR ABUNDANT LIGHTNING THROUGH WEDNESDAY EVENING FOR FIRE WEATHER ZONE OR705... ...RED FLAG WARNING IN EFFECT FOR HOT, DRY, AND UNSTABLE CONDITIONS THROUGH THURSDAY EVENING FOR FIRE WEATHER ZONE WA695... The National Weather Service in Pendleton has issued a Red Flag Warning for hot, dry, and unstable conditions, which is in effect until 9 PM PDT Thursday. * AFFECTED AREA...Fire Weather Zone 695 East Washington South Central Cascade Mountains. * Relative Humidities: Minimum 10 to 20 percent. Humidity recoveries of 25 to 35 percent on mid-slopes within thermal belts. * Temperatures: 95 to 100 valleys. 85 to 90 mountains. * TIMING...Until 9 PM PDT Thursday. * IMPACTS...Hot, dry, and unstable conditions will lead to the potential for rapid fire growth on new or existing fires.
INSTRUCTION: A Red Flag Warning means that critical fire weather conditions are either occurring now, or will shortly. A combination of strong winds, low relative humidity, and warm temperatures can contribute to extreme fire behavior.
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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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