Weather Alert in Oregon
Red Flag Warning issued July 29 at 2:26PM MDT until July 31 at 12:00AM MDT by NWS Boise ID
AREAS AFFECTED: Burns BLM; Southern Grasslands
DESCRIPTION: ...RED FLAG WARNING FOR LIGHTNING THROUGH THIS EVENING... ...RED FLAG WARNING FOR LIGHTNING WEDNESDAY AFTERNOON AND EVENING... .Scattered thunderstorms with abundant lightning will develop this afternoon and evening across portions of southeast Oregon. Storms will redevelop Wednesday afternoon and evening. While some storms will produce wetting rainfall, areas outside of thunderstorm cores will be especially susceptible to new starts. Gusty outflow winds up to 60 mph are possible near storms. The National Weather Service in Boise has issued a Red Flag Warning for lightning, which is in effect from 2 PM to 11 PM PDT Wednesday. * AFFECTED AREA...In Oregon, Fire Weather Zones 670 Burns BLM and 672 Southern Grasslands. * TIMING...For the first Red Flag Warning, until 11 PM PDT this evening. For the second Red Flag Warning, from 2 PM to 11 PM PDT Wednesday. * THUNDERSTORMS...Scattered. * OUTFLOW WINDS...Gusty erratic winds up to 60 mph. * IMPACTS...Any fire that develops will catch and spread quickly. Outdoor burning is not recommended.
INSTRUCTION: A Red Flag Warning means that critical fire weather conditions are either occurring now, or will occur shortly.
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Weather Topic: What are Nimbostratus Clouds?
Home - Education - Cloud Types - Nimbostratus Clouds
Next Topic: Precipitation
A nimbostratus cloud is similar to a stratus cloud in its formless,
smooth appearance. However, a nimbostratus cloud is darker than a stratus cloud,
because it is thicker.
Unlike a stratus cloud, a nimbostratus cloud typically brings with it the threat
of moderate to heavy precipitation. In some cases, the precipitation may evaporate
before reaching the ground, a phenomenon known as virga.
Next Topic: Precipitation
Weather Topic: What is Rain?
Home - Education - Precipitation - Rain
Next Topic: Shelf Clouds
Precipitation in the form of water droplets is called rain.
Rain generally has a tendency to fall with less intensity over a greater period
of time, and when rainfall is more severe it is usually less sustained.
Rain is the most common form of precipitation and happens with greater frequency
depending on the season and regional influences. Cities have been shown to have
an observable effect on rainfall, due to an effect called the urban heat island.
Compared to upwind, monthly rainfall between twenty and forty miles downwind of
cities is 30% greater.
Next Topic: Shelf Clouds
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