Weather Alert in Oregon
Red Flag Warning issued September 5 at 1:38PM MDT until September 5 at 10:00PM MDT by NWS Boise ID
AREAS AFFECTED: Steens Mountain; Southern Grasslands
DESCRIPTION: ...RED FLAG WARNING FOR SOUTHEAST OREGON DUE TO ABUNDANT LIGHTNING AND GUSTY THUNDERSTORM OUTFLOWS THIS AFTERNOON AND EVENING... .Scattered thunderstorms capable of producing abundant lightning are forecast Friday afternoon and evening over southeastern Oregon. Gusty outflows to 50 mph may continue well into the evening and travel a large distance away from thunderstorms. The National Weather Service in Boise has issued a Red Flag Warning for lightning, which is in effect until 9 PM PDT this evening. * AFFECTED AREA...In Oregon, Fire Weather Zones 671 Steens Mountain and 672 Southern Grasslands. * TIMING...Until 9 PM PDT this evening. * THUNDERSTORMS...Scattered coverage with abundant lightning. * OUTFLOW WINDS...Gusty erratic winds up to 50 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 Mammatus Clouds?
Home - Education - Cloud Types - Mammatus Clouds
Next Topic: Nimbostratus Clouds
A mammatus cloud is a cloud with a unique feature which resembles
a web of pouches hanging along the base of the cloud.
In the United States, mammatus clouds tend to form in the warmer months, commonly
in the Midwest and eastern regions.
While they usually form at the bottom of a cumulonimbis cloud, they can also form
under altostratus, altocumulus, stratocumulus, and cirrus clouds. Mammatus clouds
warn that severe weather is close.
Next Topic: Nimbostratus Clouds
Weather Topic: What is Precipitation?
Home - Education - Precipitation - Precipitation
Next Topic: Rain
Precipitation can refer to many different forms of water that
may fall from clouds. Precipitation occurs after a cloud has become saturated to
the point where its water particles are more dense than the air below the cloud.
In most cases, precipitation will reach the ground, but it is not uncommon for
precipitation to evaporate before it reaches the earth's surface.
When precipitation evaporates before it contacts the ground it is called Virga.
Graupel, hail, sleet, rain, drizzle, and snow are forms of precipitation, but fog
and mist are not considered precipitation because the water vapor which
constitutes them isn't dense enough to fall to the ground.
Next Topic: Rain
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