Weather Alert in California
Special Weather Statement issued August 23 at 10:27AM PDT by NWS Los Angeles/Oxnard CA
AREAS AFFECTED: Santa Clarita Valley; Central Ventura County Valleys; Southern Ventura County Mountains; Northern Ventura County Mountains; Interstate 5 Corridor; Western San Gabriel Mountains and Highway 14 Corridor; Western Antelope Valley Foothills; Antelope Valley
DESCRIPTION: At 1025 AM PDT, Doppler radar was tracking a strong thunderstorm near Lake Hughes, or 16 miles north of Santa Clarita, moving northwest at 25 mph. HAZARD...Erratic wind gusts of 35 to 50 mph. SOURCE...Radar indicated. IMPACT...Gusty winds could knock down tree limbs and blow around unsecured objects. Within the next hour, this storm will likely affect the following areas of northeastern Ventura and northwestern Los Angeles Counties...Pyramid Lake, Interstate 5 over the Grapevine, Gorman, Frazier Mountain, Highway 138 between Quail Lake and Lancaster, and Castaic Lake.
INSTRUCTION: If outdoors, consider seeking shelter inside a building. Frequent cloud to ground lightning is occurring with this storm. Lightning can strike 10 miles away from a thunderstorm. Seek a safe shelter inside a building or vehicle. This storm may intensify. Continue to monitor the situation through local media sources and the National Weather Service.
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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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