Weather Alert in Oregon
Red Flag Warning issued September 5 at 2:32PM PDT until September 5 at 11:00PM PDT by NWS Pendleton OR
AREAS AFFECTED: John Day Valley; Central Blue Mountains; Southern Blue Mountains; Western Forested Blue Mountains; Central Mountains of Oregon; Northern Deschutes National Forest; Southern Deschutes National Forest
DESCRIPTION: ...ISOLATED TO SCATTERED THUNDERSTORMS IN CENTRAL AND EASTERN OREGON TODAY... .Isolated to scattered thunderstorms capable of producing abundant cloud-to-ground lightning are forecast through this evening for much of central and eastern Oregon. Some storms will produce a wetting rain. * AFFECTED AREA...Fire Weather Zones 696 John Day Valley, 697 Central Blue Mountains, 698 Southern Blue Mountains, 699 Western Forested Blue Mountains, 700 Central Mountains of Oregon, 704 Northern Deschutes National Forest and 705 Southern Deschutes National Forest. * TIMING...Until 11 PM PDT this evening. * IMPACTS...Any fire that develops will catch and spread quickly. Outdoor burning is not recommended. * THUNDERSTORMS...Isolated to scattered thunderstorms capable of producing abundant cloud-to-ground lightning and gusty outflow winds. * OUTFLOW WINDS...Gusts up to 50 mph.
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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North America Water Vapor (Moisture)
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Weather Topic: What is Snow?
Home - Education - Precipitation - Snow
Next Topic: Stratocumulus Clouds
Snow is precipitation taking the form of ice crystals. Each ice crystal, or snowflake,
has unique characteristics, but all of them grow in a hexagonal structure.
Snowfall can last for sustained periods of time and result in significant buildup
of snow on the ground.
On the earth's surface, snow starts out light and powdery, but as it begins to melt
it tends to become more granular, producing small bits of ice which have the consistency of
sand. After several cycles of melting and freezing, snow can become very dense
and ice-like, commonly known as snow pack.
Next Topic: Stratocumulus Clouds
Weather Topic: What are Stratus Clouds?
Home - Education - Cloud Types - Stratus Clouds
Next Topic: Wall Clouds
Stratus clouds are similar to altostratus clouds, but form at a
lower altitude and are identified by their fog-like appearance, lacking the
distinguishing features of most clouds.
Stratus clouds are wider than most clouds, and their base has a smooth, uniform
look which is lighter in color than a nimbostratus cloud.
The presence of a stratus cloud indicates the possibility of minor precipitation,
such as drizzle, but heavier precipitation does not typically arrive in the form
of a stratus cloud.
Next Topic: Wall Clouds
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