Weather Alert in Oregon
Red Flag Warning issued August 3 at 7:42AM PDT until August 3 at 8:00PM PDT by NWS Pendleton OR
AREAS AFFECTED: Southern Blue Mountains
DESCRIPTION: ...ISOLATED TO WIDELY SCATTERED DRY THUNDERSTORMS THIS AFTERNOON... .A mix of scattered wet and isolated dry thunderstorms will develop across the eastern mountains this afternoon into the early evening. The driest thunderstorms are expected to develop across the Southern Blue Mountains. Abundant lightning with gusty outflow winds will be possible with any storm, resulting in increased potential for wildfire starts and rapid spread on existing fires. The National Weather Service in Pendleton has issued a Red Flag Warning for abundant lightning, which is in effect from 2 PM this afternoon to 8 PM PDT this evening. * AFFECTED AREA...Fire Weather Zone 698 Southern Blue Mountains. * TIMING...From 2 PM this afternoon to 8 PM PDT this evening. * IMPACTS...Any fire that develops will catch and spread quickly. Outdoor burning is not recommended. * THUNDERSTORMS...Abundant lightning and isolated dry thunderstorms. * OUTFLOW WINDS...Gusty, erratic winds 45 to 55 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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Weather Topic: What are Stratocumulus Clouds?
Home - Education - Cloud Types - Stratocumulus Clouds
Next Topic: Stratus Clouds
Stratocumulus clouds are similar to altocumulus clouds in their
fluffy appearance, but have a slightly darker shade due to their additional mass.
A good way to distinguish the two cloud types is to hold your hand out and measure
the size of an individual cloud; if it is the size of your thumb it is generally
an altocumulus cloud, if it is the size of your hand it is generally a
stratocumulus cloud.
It is uncommon for stratocumulus clouds to produce precipitation, but if they do
it is usually a light rain or snow.
Next Topic: Stratus Clouds
Weather Topic: What are Wall Clouds?
Home - Education - Cloud Types - Wall Clouds
Next Topic: Altocumulus Clouds
A wall cloud forms underneath the base of a cumulonimbus cloud,
and can be a hotbed for deadly tornadoes.
Wall clouds are formed by air flowing into the cumulonimbus clouds, which can
result in the wall cloud descending from the base of the cumulonimbus cloud, or
rising fractus clouds which join to the base of the storm cloud as the wall cloud
takes shape.
Wall clouds can be very large, and in the Northern Hemisphere they generally
form at the southern edge of cumulonimbus clouds.
Next Topic: Altocumulus Clouds
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