Weather Alert in Oregon
Red Flag Warning issued September 6 at 5:22AM PDT until September 6 at 11:00PM PDT by NWS Medford OR
AREAS AFFECTED: Umpqua Basin; Umpqua National Forest; Western Rogue Basin including the Illinois Valley; Siskiyou Mountains; Eastern Rogue Valley; Southern Oregon Cascades
DESCRIPTION: The National Weather Service in Medford has issued a Red Flag Warning, which is in effect from 2 PM this afternoon to 11 PM PDT this evening. * IMPACTS...Abundant lightning on dry fuels resulting in the potential for numerous new fire starts. * AFFECTED AREA...In Oregon, portions of Fire Weather Zones 616, 620, and 623, and all of 621, 622, 617. This covers areas mainly along and east of the I-5 corridor to the Cascade Crest, including Roseburg, Grants Pass and Medford. * THUNDERSTORMS...Isolated to scattered thunderstorms expected. Storms are expected to be wet, but lightning strikes outside of precipitation cores may cause many new fire starts. * OUTFLOW WINDS...Gusty and erratic outflow winds of 25 to 35 mph that could travel outward of 25 miles from thunderstorm cores. * DETAILED URL...View the hazard area in detail at https://weather.gov/wrh/hazards?wfo=mfr
INSTRUCTION: Follow all fire restrictions. You can find your county's emergency sign up form as well as links to fire restrictions at weather.gov/medford/wildfire. One less spark, one less wildfire. Be sure you're signed up for your county's emergency alert system. Familiarize yourself with your emergency plan and make sure you listen to emergency services. Visit ready.gov/plan for more information. A Red Flag Warning is issued when we identify weather conditions that promote rapid spread of fire which may become life- threatening. This does not mean there is a fire. These conditions are either occurring now or will begin soon. It is important to have multiple ways to receive information from authorities.
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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
Weather Topic: What are Altostratus Clouds?
Home - Education - Cloud Types - Altostratus Clouds
Next Topic: Cirrocumulus Clouds
Altostratus clouds form at mid to high-level altitudes
(between 2 and 7 km) and are created by a warm, stable air mass which causes
water vapor
to condense as it rise through the atmosphere. Usually altostratus clouds are
featureless sheets characterized by a uniform color.
In some cases, wind punching through the cloud formation may give it a waved
appearance, called altostratus undulatus. Altostratus clouds
are commonly seen with other cloud formations accompanying them.
Next Topic: Cirrocumulus Clouds
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