Weather Alert in Oregon
Red Flag Warning issued July 29 at 2:15PM PDT until July 31 at 11:00AM PDT by NWS Pendleton OR
AREAS AFFECTED: Central Mountains of Oregon; Southern Deschutes National Forest
DESCRIPTION: ...RED FLAG WARNING IN EFFECT FROM 2 PM TO 11 PM PDT TUESDAY FOR ABUNDANT LIGHTNING FOR FIRE WEATHER ZONES OR697, OR698, OR699, OR700, AND OR705... ...RED FLAG WARNING IN EFFECT FROM 1 PM WEDNESDAY TO 11 AM THURSDAY FOR ABUNDANT LIGHTNING FOR FIRE WEATHER ZONES OR700, OR704, AND OR705... ...RED FLAG WARNING IN EFFECT FROM 1 PM TO 9 PM WEDNESDAY FOR ABUNDANT LIGHTNING FOR FIRE WEATHER ZONE WA695... .Multiple rounds of showers and thunderstorms are forecast through Friday. While some of these storms may produce wetting rains, their high-based nature will increase the probability of isolated (today) to scattered (Wednesday) dry thunderstorms. Showers and thunderstorms will be capable of producing gusty and erratic outflow winds up to 60 mph. ...RED FLAG WARNING IN EFFECT FROM 1 PM WEDNESDAY TO 11 AM PDT THURSDAY FOR ABUNDANT LIGHTNING FOR FIRE WEATHER ZONES OR700 AND OR705... The National Weather Service in Pendleton has issued a Red Flag Warning for abundant lightning, which is in effect from 1 PM Wednesday to 11 AM PDT Thursday. The Fire Weather Watch is no longer in effect. * AFFECTED AREA...Fire Weather Zones 700 Central Mountains of Oregon and 705 Southern Deschutes National Forest. * TIMING...For the first Red Flag Warning, until 11 PM PDT this evening. For the second Red Flag Warning, from 1 PM Wednesday to 11 AM PDT Thursday. * IMPACTS...Any fire that develops will catch and spread quickly. Outdoor burning is not recommended. * THUNDERSTORMS...Abundant lightning and isolated to scattered dry thunderstorms. * OUTFLOW WINDS...Gusty, erratic winds with gusts up to 60 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 is Sleet?
Home - Education - Precipitation - Sleet
Next Topic: Snow
Sleet is a form of precipitation in which small ice pellets are the primary
components. These ice pellets are smaller and more translucent than hailstones,
and harder than graupel. Sleet is caused by specific atmospheric conditions and
therefore typically doesn't last for extended periods of time.
The condition which leads to sleet formation requires a warmer body of air to be
wedged in between two sub-freezing bodies of air. When snow falls through a warmer
layer of air it melts, and as it falls through the next sub-freezing body of air
it freezes again, forming ice pellets known as sleet. In some cases, water
droplets don't have time to freeze before reaching the surface and the result is
freezing rain.
Next Topic: Snow
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
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