Weather Alert in California
Red Flag Warning issued June 29 at 12:26PM PDT until July 1 at 8:00PM PDT by NWS Sacramento CA
AREAS AFFECTED: Eastern Portion of Shasta/Trinity NF; Burney Basin and Northeast Plateau in Shasta County Including Northwest Lassen NF north of Lassen NP; Southeast Edge Shasta/Trinity NF and Western Portions of Tehama/Glenn RU; Eastern Mendocino NF
DESCRIPTION: The National Weather Service in Sacramento has issued a Red Flag Warning for thunderstorms and strong outflow winds, which is in effect from 11 AM Monday to 8 PM PDT Tuesday. The Fire Weather Watch is no longer in effect. * Affected Area...Fire Zone 213 Eastern Portion of Shasta/Trinity NF, Fire Zone 214 Burney Basin and Northeast Plateau in Shasta County Including Northwest Lassen NF north of Lassen NP, Fire Zone 263 Southeast Edge Shasta-Trinity NF and Western Portions of Tehama-Glenn Unit and Fire Zone 279 Eastern Mendocino NF. * Thunderstorms...Isolated to scattered coverage of a mix of wet and dry thunderstorms expected. Lightning strikes may also occur outside of main precipitation cores. Highest chances for thunderstorms in the afternoon and evening hours. * Outflow Winds...Gusty and erratic outflow winds could occur near any thunderstorm development. * Impacts...Lightning can create new fire starts and may combine with gusty outflow winds to cause a fire to rapidly grow in size and intensity.
INSTRUCTION: A Red Flag Warning means that critical fire weather conditions are either occurring now, or will shortly. A combination of lightning from dry thunderstorms on dry fuels can contribute to new fire starts.
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Weather Topic: What is Sleet?
Home - Education - Precipitation - Sleet
Next Topic: Snow
Sleet is a form of precipitation in which small ice pellets are the primary
components. These ice pellets are smaller and more translucent than hailstones,
and harder than graupel. Sleet is caused by specific atmospheric conditions and
therefore typically doesn't last for extended periods of time.
The condition which leads to sleet formation requires a warmer body of air to be
wedged in between two sub-freezing bodies of air. When snow falls through a warmer
layer of air it melts, and as it falls through the next sub-freezing body of air
it freezes again, forming ice pellets known as sleet. In some cases, water
droplets don't have time to freeze before reaching the surface and the result is
freezing rain.
Next Topic: Snow
Weather Topic: What are Stratocumulus Clouds?
Home - Education - Cloud Types - Stratocumulus Clouds
Next Topic: Stratus Clouds
Stratocumulus clouds are similar to altocumulus clouds in their
fluffy appearance, but have a slightly darker shade due to their additional mass.
A good way to distinguish the two cloud types is to hold your hand out and measure
the size of an individual cloud; if it is the size of your thumb it is generally
an altocumulus cloud, if it is the size of your hand it is generally a
stratocumulus cloud.
It is uncommon for stratocumulus clouds to produce precipitation, but if they do
it is usually a light rain or snow.
Next Topic: Stratus Clouds
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