Weather Alert in California
Red Flag Warning issued July 24 at 11:37AM PDT until July 24 at 11:00PM PDT by NWS Eureka CA
AREAS AFFECTED: Lower Middle Klamath; Hoopa
DESCRIPTION: ...SCATTERED DRY THUNDERSTORMS POSSIBLE THIS AFTERNOON AND EVENING AND FRIDAY ACROSS THE INTERIOR MOUNTAINS... .Scattered dry thunderstorms are forecast to develop in the Klamath Mountains this afternoon and evening. The highest confidence of storms is in Siskiyou, Northern Humboldt, Eastern Del Norte, and Trinity counties. Scattered Thunderstorms are possible again on Friday, with the highest confidence in Trinity County, Eastern Mendocino, and Northern Lake Counties. The National Weather Service in Eureka has cancelled the Fire Weather Watch for Friday. There is still the potential for a few isolated lightning strikes, but they are not expected to be widespread enough for a red flag warning. The Red Flag Warning for Thursday remains in effect. * OUTFLOW WINDS...Gusty and erratic outflow winds up to 50 mph are possible. * IMPACTS...Lightning strikes may start fires.
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 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
Weather Topic: What is Snow?
Home - Education - Precipitation - Snow
Next Topic: Stratocumulus Clouds
Snow is precipitation taking the form of ice crystals. Each ice crystal, or snowflake,
has unique characteristics, but all of them grow in a hexagonal structure.
Snowfall can last for sustained periods of time and result in significant buildup
of snow on the ground.
On the earth's surface, snow starts out light and powdery, but as it begins to melt
it tends to become more granular, producing small bits of ice which have the consistency of
sand. After several cycles of melting and freezing, snow can become very dense
and ice-like, commonly known as snow pack.
Next Topic: Stratocumulus Clouds
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