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 Cumulonimbus Clouds?
Home - Education - Cloud Types - Cumulonimbus Clouds
Next Topic: Cumulus Clouds
The final form taken by a growing cumulus cloud is the
cumulonimbus cloud, which is very tall and dense.
The tower of a cumulonimbus cloud can soar 23 km into the atmosphere, although
most commonly they stop growing at an altitude of 6 km.
Even small cumulonimbus clouds appear very large in comparison to other cloud types.
They can signal the approach of stormy weather, such as thunderstorms or blizzards.
Next Topic: Cumulus Clouds
Weather Topic: What is Drizzle?
Home - Education - Precipitation - Drizzle
Next Topic: Evaporation
Drizzle is precipitation in the form of water droplets which are
smaller than raindrops.
Drizzle is characterized by fine, gently falling droplets and typically does not
impact human habitation in a negative way. The exception to this is freezing drizzle,
a condition where drizzle freezes immediately upon reaching earth's surface.
Freezing drizzle is still less dangerous than freezing rain, but can
potentially result in hazardous road conditions.
Next Topic: Evaporation
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