Weather Alert in California
Red Flag Warning issued June 30 at 1:28PM PDT until July 1 at 8:00PM PDT by NWS Medford OR
AREAS AFFECTED: Western Klamath National Forest; Central Siskiyou County Including Shasta Valley; Siskiyou County from the Cascade Mountains East and South to Mt Shasta
DESCRIPTION: The National Weather Service in Medford has upgraded the Fire Weather Watch to a Red Flag Warning, which is in effect from 2 PM to 8 PM PDT Tuesday. * IMPACTS...Given the long stretch of dry and hot and very conditions, lightning efficiency will be high to very high for fire starts. Any fires that develop will likely spread rapidly. * AFFECTED AREA...All of Fire Weather Zones 280, 281, and 284. * THUNDERSTORMS...Isolated to scattered thunderstorms. Lightning strikes outside of precipitation cores are possible, and cause for concern. * OUTFLOW WINDS...Gust up to 35 mph. These outflow winds can travel up to 50 miles away from the thunderstorm that caused it. * ADDITIONAL INFORMATION...Storms will tend to be isolated to start then increasing during the afternoon into the early evening hours both Monday and Tuesday. Thunderstorms are expected to trend wetter later in the afternoon and early evening both Monday and Tuesday, but remain a mix of wet and dry storms. * DETAILED URL...View the hazard area in detail at https://www.wrh.noaa.gov/map/?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 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
Weather Topic: What are Shelf Clouds?
Home - Education - Cloud Types - Shelf Clouds
Next Topic: Sleet
A shelf cloud is similar to a wall cloud, but forms at the front
of a storm cloud, instead of at the rear, where wall clouds form.
A shelf cloud is caused by a series of events set into motion by the advancing
storm; first, cool air settles along the ground where precipitation has just fallen.
As the cool air is brought in, the warmer air is displaced, and rises above it,
because it is less dense. When the warmer air reaches the bottom of the storm cloud,
it begins to cool again, and the resulting condensation is a visible shelf cloud.
Next Topic: Sleet
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